Cryo-EM structure of the Photosystem I - LHCI supercomplex from Coelastrella sp.
Resolution: 2.81 Å
EM Method: Single-particle
Fitted PDBs: 8cmo
Q-score: 0.537
Fadeeva M, Klaiman D, Nelson N
To Be Published
- Photosystem i p700 chlorophyll a apoprotein a1 psaa (82 kDa, Protein from Coelastrella)
- Phylloquinone (450 Da, Ligand)
- Photosystem i reaction center subunit ii psad (16 kDa, Protein from Coelastrella)
- Light-harvesting protein of photosystem i lhca9 (20 kDa, Protein from Coelastrella)
- Chlorophyll a isomer (893 Da, Ligand)
- Light-harvesting protein of photosystem i lhca4 (22 kDa, Protein from Coelastrella)
- Chlorophyll a (893 Da, Ligand)
- (2r)-2-hydroxy-3-(phosphonooxy)propyl (9e)-octadec-9-enoate (436 Da, Ligand)
- Chlorophyll b (907 Da, Ligand)
- Photosystem i reaction centre subunit xi psal (12 kDa, Protein from Coelastrella)
- 1,2-distearoyl-monogalactosyl-diglyceride (787 Da, Ligand)
- Octanoic acid (caprylic acid) (144 Da, Ligand)
- 1,2-diacyl-glycerol-3-sn-phosphate (704 Da, Ligand)
- Light-harvesting protein of photosystem i lhca6 (24 kDa, Protein from Coelastrella)
- Light-harvesting protein of photosystem i lhca1 (20 kDa, Protein from Coelastrella)
- 1,2-dipalmitoyl-phosphatidyl-glycerole (722 Da, Ligand)
- (3r,3'r,6s)-4,5-didehydro-5,6-dihydro-beta,beta-carotene-3,3'-diol (568 Da, Ligand)
- Beta-carotene (536 Da, Ligand)
- Photosystem i reaction center subunit viii psai (4 kDa, Protein from Coelastrella)
- Phosphatidylinositol (887 Da, Ligand)
- Light-harvesting protein of photosystem i lhca2 partial (7 kDa, Protein from Coelastrella)
- Photosystem i reaction center subunit iv psae (6 kDa, Protein from Coelastrella)
- Sphingosine (299 Da, Ligand)
- Calcium ion (40 Da, Ligand)
- Lauric acid (200 Da, Ligand)
- Coelastrella sp. photosystem i (900 kDa, Complex from Coelastrella)
- (2s)-3-{[(r)-(2-aminoethoxy)(hydroxy)phosphoryl]oxy}-2-hydroxypropyl hexadecanoate (453 Da, Ligand)
- Light-harvesting protein of photosystem i lhca3 (23 kDa, Protein from Coelastrella)
- (1~{s})-3,5,5-trimethyl-4-[(1~{e},3~{e},5~{e},7~{e},9~{e},11~{e},13~{e},15~{e},17~{e})-3,7,12,16-tetramethyl-18-[(4~{s})-2,6,6-trimethyl-4-oxidanyl-cyclohexen-1-yl]octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]cyclohex-3-en-1-ol (568 Da, Ligand)
- Photosystem i subunit vii psac (8 kDa, Protein from Coelastrella)
- Water (18 Da, Ligand)
- 1,2-di-o-acyl-3-o-[6-deoxy-6-sulfo-alpha-d-glucopyranosyl]-sn-glycerol (795 Da, Ligand)
- Diacyl glycerol (625 Da, Ligand)
- Light-harvesting protein of photosystem i lhca7 (24 kDa, Protein from Coelastrella)
- Photosystem i p700 chlorophyll a apoprotein a2 psab (81 kDa, Protein from Coelastrella)
- Photosystem i reaction center subunit v psag (9 kDa, Protein from Coelastrella)
- Iron/sulfur cluster (351 Da, Ligand)
- Digalactosyl diacyl glycerol (dgdg) (949 Da, Ligand)
- Photosystem i subunit ix psaj (4 kDa, Protein from Coelastrella)
- Light-harvesting protein of photosystem i lhca8 (22 kDa, Protein from Coelastrella)
- Light-harvesting protein of photosystem i lhca5 (24 kDa, Protein from Coelastrella)
- (3r)-beta,beta-caroten-3-ol (552 Da, Ligand)
- Photosystem i reaction center subunit iii psaf (17 kDa, Protein from Coelastrella)
- Dodecyl-beta-d-maltoside (510 Da, Ligand)
- Photosystem i reaction center subunit x psak (8 kDa, Protein from Coelastrella)
Photosystem I assembly intermediate of Avena sativa
Resolution: 2.2 Å
EM Method: Single-particle
Fitted PDBs: 8bcv
Q-score: 0.645
Naschberger A, Amunts A, Nelson N
To Be Published
- Photosystem i reaction center subunit x (13 kDa, Protein from Avena sativa)
- Phylloquinone (450 Da, Ligand)
- Photosystem i reaction center subunit viii (3 kDa, Protein from Avena sativa)
- Chlorophyll a isomer (893 Da, Ligand)
- Photosystem i reaction center subunit v (15 kDa, Protein from Avena sativa)
- Chlorophyll a (893 Da, Ligand)
- Chlorophyll b (907 Da, Ligand)
- 1,2-distearoyl-monogalactosyl-diglyceride (787 Da, Ligand)
- 1,2-dipalmitoyl-phosphatidyl-glycerole (722 Da, Ligand)
- (3r,3'r,6s)-4,5-didehydro-5,6-dihydro-beta,beta-carotene-3,3'-diol (568 Da, Ligand)
- Beta-carotene (536 Da, Ligand)
- Photosystem i reaction center subunit vi (10 kDa, Protein from Avena sativa)
- Chlorophyll a-b binding protein 3, chloroplastic (29 kDa, Protein from Avena sativa)
- Photosystem i p700 chlorophyll a apoprotein a2 (82 kDa, Protein from Avena sativa)
- Chlorophyll a-b binding protein 4, chloroplastic (27 kDa, Protein from Avena sativa)
- Antheraxanthin (584 Da, Ligand)
- Assembly intermediate of psi from avena sativa (Complex from Avena sativa)
- (1~{s})-3,5,5-trimethyl-4-[(1~{e},3~{e},5~{e},7~{e},9~{e},11~{e},13~{e},15~{e},17~{e})-3,7,12,16-tetramethyl-18-[(4~{s})-2,6,6-trimethyl-4-oxidanyl-cyclohexen-1-yl]octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]cyclohex-3-en-1-ol (568 Da, Ligand)
- Photosystem i p700 chlorophyll a apoprotein a1 (83 kDa, Protein from Avena sativa)
- Photosystem i reaction center subunit iv (15 kDa, Protein from Avena sativa)
- Photosystem i reaction center subunit xi (22 kDa, Protein from Avena sativa)
- Water (18 Da, Ligand)
- Dodecyl-alpha-d-maltoside (510 Da, Ligand)
- Chlorophyll a-b binding protein 1, chloroplastic (26 kDa, Protein from Avena sativa)
- Iron/sulfur cluster (351 Da, Ligand)
- Photosystem i iron-sulfur center (8 kDa, Protein from Avena sativa)
- Photosystem i reaction center subunit iii (19 kDa, Protein from Avena sativa)
- Photosystem i reaction center subunit ix (5 kDa, Protein from Avena sativa)
- Digalactosyl diacyl glycerol (dgdg) (949 Da, Ligand)
- Chlorophyll a-b binding protein 2, chloroplastic (22 kDa, Protein from Avena sativa)
- (3s,5r,6s,3's,5'r,6's)-5,6,5',6'-diepoxy-5,6,5',6'- tetrahydro-beta,beta-carotene-3,3'-diol (600 Da, Ligand)
- Photosystem i reaction center subunit ii (22 kDa, Protein from Avena sativa)
Chlamydomonas reinhardtii TSP9 mutant small Photosystem I complex
Resolution: 2.52 Å
EM Method: Single-particle
Fitted PDBs: 7r3k
Q-score: 0.633
Schwartz T, Fadeeva M, Klaiman D, Nelson N
Biomolecules (2023) 13 [ DOI: doi:10.3390/biom13030537 Pubmed: 36979472 ]
- Photosystem i p700 chlorophyll a apoprotein a2 (82 kDa, Protein from Chlamydomonas reinhardtii)
- Chlorophyll a-b binding protein, chloroplastic (32 kDa, Protein from Chlamydomonas reinhardtii)
- Phylloquinone (450 Da, Ligand)
- Chlorophyll a isomer (893 Da, Ligand)
- Chlorophyll a-b binding protein, chloroplastic (lhca4) (28 kDa, Protein from Chlamydomonas reinhardtii)
- Chlorophyll a (893 Da, Ligand)
- Chlorophyll a-b binding protein, chloroplastic (27 kDa, Protein from Chlamydomonas reinhardtii)
- Chlorophyll b (907 Da, Ligand)
- Photosystem i reaction center subunit ix (4 kDa, Protein from Chlamydomonas reinhardtii)
- 1,2-distearoyl-monogalactosyl-diglyceride (787 Da, Ligand)
- 1,2-diacyl-glycerol-3-sn-phosphate (704 Da, Ligand)
- 1,2-dipalmitoyl-phosphatidyl-glycerole (722 Da, Ligand)
- (3r,3'r,6s)-4,5-didehydro-5,6-dihydro-beta,beta-carotene-3,3'-diol (568 Da, Ligand)
- Palmitic acid (256 Da, Ligand)
- Beta-carotene (536 Da, Ligand)
- Photosystem i reaction center subunit v, chloroplastic (13 kDa, Protein from Chlamydomonas reinhardtii)
- Sphingosine (299 Da, Ligand)
- Calcium ion (40 Da, Ligand)
- Lauric acid (200 Da, Ligand)
- Photosystem i reaction center subunit iii, chloroplastic (24 kDa, Protein from Chlamydomonas reinhardtii)
- Photosystem i iron-sulfur center (8 kDa, Protein from Chlamydomonas reinhardtii)
- (1~{s})-3,5,5-trimethyl-4-[(1~{e},3~{e},5~{e},7~{e},9~{e},11~{e},13~{e},15~{e},17~{e})-3,7,12,16-tetramethyl-18-[(4~{s})-2,6,6-trimethyl-4-oxidanyl-cyclohexen-1-yl]octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]cyclohex-3-en-1-ol (568 Da, Ligand)
- Chlorophyll a-b binding protein, chloroplastic (25 kDa, Protein from Chlamydomonas reinhardtii)
- Chlorophyll a-b binding protein, chloroplastic (23 kDa, Protein from Chlamydomonas reinhardtii)
- Photosystem i reaction center subunit viii (10 kDa, Protein from Chlamydomonas reinhardtii)
- Water (18 Da, Ligand)
- Photosystem i p700 chlorophyll a apoprotein a1 (83 kDa, Protein from Chlamydomonas reinhardtii)
- 1,2-di-o-acyl-3-o-[6-deoxy-6-sulfo-alpha-d-glucopyranosyl]-sn-glycerol (795 Da, Ligand)
- Diacyl glycerol (625 Da, Ligand)
- Photosystem i reaction center subunit iv, chloroplastic (10 kDa, Protein from Chlamydomonas reinhardtii)
- Iron/sulfur cluster (351 Da, Ligand)
- Digalactosyl diacyl glycerol (dgdg) (949 Da, Ligand)
- Chlorophyll a-b binding protein, chloroplastic (26 kDa, Protein from Chlamydomonas reinhardtii)
- Chlorophyll a-b binding protein, chloroplastic (28 kDa, Protein from Chlamydomonas reinhardtii)
- C. reinhardtii photosystem i supercomplex (780 kDa, Complex from Chlamydomonas reinhardtii)
- (3r)-beta,beta-caroten-3-ol (552 Da, Ligand)
- Photosystem i reaction center subunit psak, chloroplastic (11 kDa, Protein from Chlamydomonas reinhardtii)
- Photosystem i reaction center subunit ii, chloroplastic (21 kDa, Protein from Chlamydomonas reinhardtii)
- Ergosterol (396 Da, Ligand)
- Dodecyl-beta-d-maltoside (510 Da, Ligand)
Unstacked compact Dunaliella PSII
Resolution: 2.43 Å
EM Method: Single-particle
Fitted PDBs: 7pi0
Q-score: 0.623
Caspy I, Fadeeva M, Mazor Y, Nelson N
eLife (2023) 12 [ Pubmed: 36799903 DOI: doi:10.7554/eLife.81150 ]
- Fe (ii) ion (55 Da, Ligand)
- Photosystem ii reaction center protein l (4 kDa, Protein from Dunaliella salina)
- (1r,3r)-6-{(3e,5e,7e,9e,11e,13e,15e,17e)-18-[(1s,4r,6r)-4-hydroxy-2,2,6-trimethyl-7-oxabicyclo[4.1.0]hept-1-yl]-3,7,12,16-tetramethyloctadeca-1,3,5,7,9,11,13,15,17-nonaenylidene}-1,5,5-trimethylcyclohexane-1,3-diol (600 Da, Ligand)
- Cp29 (21 kDa, Protein from Dunaliella salina)
- Chlorophyll a (893 Da, Ligand)
- Chlorophyll b (907 Da, Ligand)
- Psbo (25 kDa, Protein from Dunaliella salina)
- 1,2-distearoyl-monogalactosyl-diglyceride (787 Da, Ligand)
- 1,2-diacyl-glycerol-3-sn-phosphate (704 Da, Ligand)
- Sodium ion (22 Da, Ligand)
- 2,3-dimethyl-5-(3,7,11,15,19,23,27,31,35-nonamethyl-2,6,10,14,18,22,26,30,34-hexatriacontanonaenyl-2,5-cyclohexadiene-1,4-dione-2,3-dimethyl-5-solanesyl-1,4-benzoquinone (749 Da, Ligand)
- 1,2-dipalmitoyl-phosphatidyl-glycerole (722 Da, Ligand)
- (3r,3'r,6s)-4,5-didehydro-5,6-dihydro-beta,beta-carotene-3,3'-diol (568 Da, Ligand)
- Beta-carotene (536 Da, Ligand)
- Photosystem ii cp43 reaction center protein (49 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein i (3 kDa, Protein from Dunaliella salina)
- Pheophytin a (871 Da, Ligand)
- Sphingosine (299 Da, Ligand)
- Photosystem ii reaction center protein t (3 kDa, Protein from Dunaliella salina)
- Chlorophyll a-b binding protein, chloroplastic (23 kDa, Protein from Dunaliella salina)
- Cytochrome b559 subunit beta (3 kDa, Protein from Dunaliella salina)
- Psbu (3 kDa, Protein from Dunaliella salina)
- (2s)-3-{[(r)-(2-aminoethoxy)(hydroxy)phosphoryl]oxy}-2-hydroxypropyl hexadecanoate (453 Da, Ligand)
- Lhcii m3 (24 kDa, Protein from Dunaliella salina)
- Psbw (4 kDa, Protein from Dunaliella salina)
- Ca-mn4-o5 cluster (339 Da, Ligand)
- (1~{s})-3,5,5-trimethyl-4-[(1~{e},3~{e},5~{e},7~{e},9~{e},11~{e},13~{e},15~{e},17~{e})-3,7,12,16-tetramethyl-18-[(4~{s})-2,6,6-trimethyl-4-oxidanyl-cyclohexen-1-yl]octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]cyclohex-3-en-1-ol (568 Da, Ligand)
- Cp26 (26 kDa, Protein from Dunaliella salina)
- Cytochrome b559 subunit alpha (8 kDa, Protein from Dunaliella salina)
- Water (18 Da, Ligand)
- Photosystem ii reaction center protein j (3 kDa, Protein from Dunaliella salina)
- 1,2-di-o-acyl-3-o-[6-deoxy-6-sulfo-alpha-d-glucopyranosyl]-sn-glycerol (795 Da, Ligand)
- Photosystem ii reaction center protein h (7 kDa, Protein from Dunaliella salina)
- Diacyl glycerol (625 Da, Ligand)
- Psbx (2 kDa, Protein from Dunaliella salina)
- Photosystem ii d2 protein (38 kDa, Protein from Dunaliella salina)
- Photosystem ii protein d1 (37 kDa, Protein from Dunaliella salina)
- Digalactosyl diacyl glycerol (dgdg) (949 Da, Ligand)
- Protoporphyrin ix containing fe (616 Da, Ligand)
- Chloride ion (35 Da, Ligand)
- Phosphatidylethanolamine (734 Da, Ligand)
- Photosystem ii reaction center protein ycf12 (3 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein k (4 kDa, Protein from Dunaliella salina)
- (3s,5r,6s,3's,5'r,6's)-5,6,5',6'-diepoxy-5,6,5',6'- tetrahydro-beta,beta-carotene-3,3'-diol (600 Da, Ligand)
- Dunaliella salina photosystem ii complex (Complex from Dunaliella salina)
- Bicarbonate ion (61 Da, Ligand)
- (3r)-beta,beta-caroten-3-ol (552 Da, Ligand)
- Psbp (20 kDa, Protein from Dunaliella salina)
- Psbm (3 kDa, Protein from Dunaliella salina)
- Lhcii m1 (23 kDa, Protein from Dunaliella salina)
- Dodecyl-beta-d-maltoside (510 Da, Ligand)
- Photosystem ii cp47 reaction center protein (53 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein z (6 kDa, Protein from Dunaliella salina)
Unstacked stretched Dunaliella PSII
Resolution: 2.78 Å
EM Method: Single-particle
Fitted PDBs: 7pi5
Q-score: 0.542
Caspy I, Fadeeva M, Mazor Y, Nelson N
eLife (2023) 12 [ Pubmed: 36799903 DOI: doi:10.7554/eLife.81150 ]
- (1r,3r)-6-{(3e,5e,7e,9e,11e,13e,15e,17e)-18-[(1s,4r,6r)-4-hydroxy-2,2,6-trimethyl-7-oxabicyclo[4.1.0]hept-1-yl]-3,7,12,16-tetramethyloctadeca-1,3,5,7,9,11,13,15,17-nonaenylidene}-1,5,5-trimethylcyclohexane-1,3-diol (600 Da, Ligand)
- Cp29 (21 kDa, Protein from Dunaliella salina)
- 1,2-distearoyl-monogalactosyl-diglyceride (787 Da, Ligand)
- Beta-carotene (536 Da, Ligand)
- Photosystem ii cp43 reaction center protein (49 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein h (7 kDa, Protein from Dunaliella salina)
- 1,2-di-o-acyl-3-o-[6-deoxy-6-sulfo-alpha-d-glucopyranosyl]-sn-glycerol (795 Da, Ligand)
- Photosystem ii d2 protein (38 kDa, Protein from Dunaliella salina)
- Digalactosyl diacyl glycerol (dgdg) (949 Da, Ligand)
- (3r,3'r,6s)-4,5-didehydro-5,6-dihydro-beta,beta-carotene-3,3'-diol (568 Da, Ligand)
- Photosystem ii reaction center protein k (4 kDa, Protein from Dunaliella salina)
- Hypothetical protein (2 kDa, Protein from Dunaliella salina)
- Protoporphyrin ix containing fe (616 Da, Ligand)
- Lhcii m1 (23 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein z (6 kDa, Protein from Dunaliella salina)
- Lhcii m3 (24 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein i (3 kDa, Protein from Dunaliella salina)
- Cp26 (26 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein l (4 kDa, Protein from Dunaliella salina)
- Glycerol (92 Da, Ligand)
- 2,3-dimethyl-5-(3,7,11,15,19,23,27,31,35-nonamethyl-2,6,10,14,18,22,26,30,34-hexatriacontanonaenyl-2,5-cyclohexadiene-1,4-dione-2,3-dimethyl-5-solanesyl-1,4-benzoquinone (749 Da, Ligand)
- Psbu (3 kDa, Protein from Dunaliella salina)
- Dunaliella salina photosystem ii complex (Complex from Dunaliella salina)
- (3r)-beta,beta-caroten-3-ol (552 Da, Ligand)
- Sodium ion (22 Da, Ligand)
- 1,2-diacyl-glycerol-3-sn-phosphate (704 Da, Ligand)
- Chlorophyll b (907 Da, Ligand)
- (3s,5r,6s,3's,5'r,6's)-5,6,5',6'-diepoxy-5,6,5',6'- tetrahydro-beta,beta-carotene-3,3'-diol (600 Da, Ligand)
- Photosystem ii reaction center protein ycf12 (3 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein m (3 kDa, Protein from Dunaliella salina)
- Psbp (20 kDa, Protein from Dunaliella salina)
- Chloride ion (35 Da, Ligand)
- Trimethyl-[(2~{r})-1-oxidanyl-1-oxidanylidene-4-[(2~{s})-2-[(1~{s})-1-oxidanyloctadecoxy]-3-[(1~{r})-1-oxidanyloctadecoxy]propoxy]butan-2-yl]azanium (773 Da, Ligand)
- Psii 6.1 kda protein (4 kDa, Protein from Dunaliella salina)
- Cytochrome b559 subunit alpha (8 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein t (3 kDa, Protein from Dunaliella salina)
- Pheophytin a (871 Da, Ligand)
- Ca-mn4-o5 cluster (339 Da, Ligand)
- Bicarbonate ion (61 Da, Ligand)
- Photosystem ii cp47 reaction center protein (53 kDa, Protein from Dunaliella salina)
- Psbo (25 kDa, Protein from Dunaliella salina)
- Chlorophyll a (893 Da, Ligand)
- Fe (ii) ion (55 Da, Ligand)
- Diacyl glycerol (625 Da, Ligand)
- (1~{s})-3,5,5-trimethyl-4-[(1~{e},3~{e},5~{e},7~{e},9~{e},11~{e},13~{e},15~{e},17~{e})-3,7,12,16-tetramethyl-18-[(4~{s})-2,6,6-trimethyl-4-oxidanyl-cyclohexen-1-yl]octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]cyclohex-3-en-1-ol (568 Da, Ligand)
- Water (18 Da, Ligand)
- Chlorophyll a-b binding protein, chloroplastic (23 kDa, Protein from Dunaliella salina)
- Cytochrome b559 subunit beta (3 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein j (3 kDa, Protein from Dunaliella salina)
- Photosystem ii protein d1 (37 kDa, Protein from Dunaliella salina)
- 1,2-dipalmitoyl-phosphatidyl-glycerole (722 Da, Ligand)
- Sphingosine (299 Da, Ligand)
- (2s)-3-{[(r)-(2-aminoethoxy)(hydroxy)phosphoryl]oxy}-2-hydroxypropyl hexadecanoate (453 Da, Ligand)
Stacked compact Dunaliella PSII
Resolution: 3.6 Å
EM Method: Single-particle
Fitted PDBs: 7pin
Q-score: 0.328
Caspy I, Fadeeva M, Mazor Y, Nelson N
eLife (2023) 12 [ Pubmed: 36799903 DOI: doi:10.7554/eLife.81150 ]
- Tripalmitoylglycerol (807 Da, Ligand)
- (1r,3r)-6-{(3e,5e,7e,9e,11e,13e,15e,17e)-18-[(1s,4r,6r)-4-hydroxy-2,2,6-trimethyl-7-oxabicyclo[4.1.0]hept-1-yl]-3,7,12,16-tetramethyloctadeca-1,3,5,7,9,11,13,15,17-nonaenylidene}-1,5,5-trimethylcyclohexane-1,3-diol (600 Da, Ligand)
- Phosphatidylethanolamine (734 Da, Ligand)
- Psbj (3 kDa, Protein from Dunaliella salina)
- 1,2-distearoyl-monogalactosyl-diglyceride (787 Da, Ligand)
- Beta-carotene (536 Da, Ligand)
- Photosystem ii cp43 reaction center protein (49 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein h (7 kDa, Protein from Dunaliella salina)
- 1,2-di-o-acyl-3-o-[6-deoxy-6-sulfo-alpha-d-glucopyranosyl]-sn-glycerol (795 Da, Ligand)
- Photosystem ii d2 protein (38 kDa, Protein from Dunaliella salina)
- Digalactosyl diacyl glycerol (dgdg) (949 Da, Ligand)
- (3r,3'r,6s)-4,5-didehydro-5,6-dihydro-beta,beta-carotene-3,3'-diol (568 Da, Ligand)
- Photosystem ii reaction center protein k (4 kDa, Protein from Dunaliella salina)
- Protoporphyrin ix containing fe (616 Da, Ligand)
- Lhcii m1 (23 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein z (6 kDa, Protein from Dunaliella salina)
- Ergosterol (396 Da, Ligand)
- Lhcii m3 (24 kDa, Protein from Dunaliella salina)
- Psbm (3 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein i (3 kDa, Protein from Dunaliella salina)
- Cp26 (26 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein l (4 kDa, Protein from Dunaliella salina)
- 2,3-dimethyl-5-(3,7,11,15,19,23,27,31,35-nonamethyl-2,6,10,14,18,22,26,30,34-hexatriacontanonaenyl-2,5-cyclohexadiene-1,4-dione-2,3-dimethyl-5-solanesyl-1,4-benzoquinone (749 Da, Ligand)
- Glycerol (92 Da, Ligand)
- Psbu (3 kDa, Protein from Dunaliella salina)
- Dunaliella salina photosystem ii complex (Complex from Dunaliella salina)
- 1,2-diacyl-glycerol-3-sn-phosphate (704 Da, Ligand)
- Psbx (2 kDa, Protein from Dunaliella salina)
- Sodium ion (22 Da, Ligand)
- (3r)-beta,beta-caroten-3-ol (552 Da, Ligand)
- Psbw (4 kDa, Protein from Dunaliella salina)
- Chlorophyll b (907 Da, Ligand)
- (3s,5r,6s,3's,5'r,6's)-5,6,5',6'-diepoxy-5,6,5',6'- tetrahydro-beta,beta-carotene-3,3'-diol (600 Da, Ligand)
- Photosystem ii reaction center protein ycf12 (3 kDa, Protein from Dunaliella salina)
- Psbp (20 kDa, Protein from Dunaliella salina)
- Chloride ion (35 Da, Ligand)
- Trimethyl-[(2~{r})-1-oxidanyl-1-oxidanylidene-4-[(2~{s})-2-[(1~{s})-1-oxidanyloctadecoxy]-3-[(1~{r})-1-oxidanyloctadecoxy]propoxy]butan-2-yl]azanium (773 Da, Ligand)
- Cytochrome b559 subunit alpha (8 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein t (3 kDa, Protein from Dunaliella salina)
- Pheophytin a (871 Da, Ligand)
- Ca-mn4-o5 cluster (339 Da, Ligand)
- Cp29 (21 kDa, Protein from Dunaliella salina)
- Bicarbonate ion (61 Da, Ligand)
- Photosystem ii cp47 reaction center protein (53 kDa, Protein from Dunaliella salina)
- Psbo (25 kDa, Protein from Dunaliella salina)
- Chlorophyll a (893 Da, Ligand)
- Fe (ii) ion (55 Da, Ligand)
- Diacyl glycerol (625 Da, Ligand)
- (1~{s})-3,5,5-trimethyl-4-[(1~{e},3~{e},5~{e},7~{e},9~{e},11~{e},13~{e},15~{e},17~{e})-3,7,12,16-tetramethyl-18-[(4~{s})-2,6,6-trimethyl-4-oxidanyl-cyclohexen-1-yl]octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]cyclohex-3-en-1-ol (568 Da, Ligand)
- Chlorophyll a-b binding protein, chloroplastic (23 kDa, Protein from Dunaliella salina)
- Cytochrome b559 subunit beta (3 kDa, Protein from Dunaliella salina)
- Photosystem ii protein d1 (37 kDa, Protein from Dunaliella salina)
- 1,2-dipalmitoyl-phosphatidyl-glycerole (722 Da, Ligand)
- Dodecyl-beta-d-maltoside (510 Da, Ligand)
- Sphingosine (299 Da, Ligand)
- (2s)-3-{[(r)-(2-aminoethoxy)(hydroxy)phosphoryl]oxy}-2-hydroxypropyl hexadecanoate (453 Da, Ligand)
Stacked stretched Dunaliella PSII
Resolution: 4.0 Å
EM Method: Single-particle
Fitted PDBs: 7piw
Q-score: 0.236
Caspy I, Fadeeva M, Mazor Y, Nelson N
eLife (2023) 12 [ Pubmed: 36799903 DOI: doi:10.7554/eLife.81150 ]
- Photosystem ii cp43 reaction center protein (49 kDa, Protein from Green alga, Protococcus salinus)
- Cp29 (21 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein h (7 kDa, Protein from Green alga, Protococcus salinus)
- (1r,3r)-6-{(3e,5e,7e,9e,11e,13e,15e,17e)-18-[(1s,4r,6r)-4-hydroxy-2,2,6-trimethyl-7-oxabicyclo[4.1.0]hept-1-yl]-3,7,12,16-tetramethyloctadeca-1,3,5,7,9,11,13,15,17-nonaenylidene}-1,5,5-trimethylcyclohexane-1,3-diol (600 Da, Ligand)
- Tripalmitoylglycerol (807 Da, Ligand)
- Photosystem ii reaction center protein k (4 kDa, Protein from Green alga, Protococcus salinus)
- Photosystem ii cp47 reaction center protein (53 kDa, Protein from Green alga, Protococcus salinus)
- Phosphatidylethanolamine (734 Da, Ligand)
- Photosystem ii reaction center protein m (3 kDa, Protein from Green alga, Protococcus salinus)
- Beta-carotene (536 Da, Ligand)
- 1,2-distearoyl-monogalactosyl-diglyceride (787 Da, Ligand)
- 1,2-di-o-acyl-3-o-[6-deoxy-6-sulfo-alpha-d-glucopyranosyl]-sn-glycerol (795 Da, Ligand)
- Digalactosyl diacyl glycerol (dgdg) (949 Da, Ligand)
- (3r,3'r,6s)-4,5-didehydro-5,6-dihydro-beta,beta-carotene-3,3'-diol (568 Da, Ligand)
- Protoporphyrin ix containing fe (616 Da, Ligand)
- Lhcii m1 (23 kDa, Protein from Dunaliella salina)
- Ergosterol (396 Da, Ligand)
- Lhcii m3 (24 kDa, Protein from Dunaliella salina)
- Lhcii m2 (23 kDa, Protein from Dunaliella salina)
- Cp26 (26 kDa, Protein from Dunaliella salina)
- 2,3-dimethyl-5-(3,7,11,15,19,23,27,31,35-nonamethyl-2,6,10,14,18,22,26,30,34-hexatriacontanonaenyl-2,5-cyclohexadiene-1,4-dione-2,3-dimethyl-5-solanesyl-1,4-benzoquinone (749 Da, Ligand)
- Glycerol (92 Da, Ligand)
- Psbu (3 kDa, Protein from Dunaliella salina)
- Dunaliella salina photosystem ii complex (Complex from Dunaliella salina)
- (3r)-beta,beta-caroten-3-ol (552 Da, Ligand)
- Psbx (2 kDa, Protein from Dunaliella salina)
- Sodium ion (22 Da, Ligand)
- 1,2-diacyl-glycerol-3-sn-phosphate (704 Da, Ligand)
- Psbw (4 kDa, Protein from Dunaliella salina)
- Photosystem ii protein d1 (37 kDa, Protein from Green alga, Protococcus salinus)
- Chlorophyll b (907 Da, Ligand)
- (3s,5r,6s,3's,5'r,6's)-5,6,5',6'-diepoxy-5,6,5',6'- tetrahydro-beta,beta-carotene-3,3'-diol (600 Da, Ligand)
- Psbp (20 kDa, Protein from Dunaliella salina)
- Chloride ion (35 Da, Ligand)
- Trimethyl-[(2~{r})-1-oxidanyl-1-oxidanylidene-4-[(2~{s})-2-[(1~{s})-1-oxidanyloctadecoxy]-3-[(1~{r})-1-oxidanyloctadecoxy]propoxy]butan-2-yl]azanium (773 Da, Ligand)
- Photosystem ii reaction center protein t (3 kDa, Protein from Green alga, Protococcus salinus)
- Cytochrome b559 subunit beta (3 kDa, Protein from Green alga, Protococcus salinus)
- Photosystem ii reaction center protein l (4 kDa, Protein from Green alga, Protococcus salinus)
- Ca-mn4-o5 cluster (339 Da, Ligand)
- Pheophytin a (871 Da, Ligand)
- Bicarbonate ion (61 Da, Ligand)
- Photosystem ii reaction center protein m (3 kDa, Protein from Green alga, Protococcus salinus)
- Photosystem ii d2 protein (38 kDa, Protein from Green alga, Protococcus salinus)
- Psbo (25 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein i (3 kDa, Protein from Green alga, Protococcus salinus)
- Cp29 (21 kDa, Protein from Dunaliella salina)
- Chlorophyll a (893 Da, Ligand)
- Photosystem ii reaction center protein j (3 kDa, Protein from Green alga, Protococcus salinus)
- Psbz (6 kDa, Protein from Dunaliella salina)
- Fe (ii) ion (55 Da, Ligand)
- Cytochrome b559 subunit alpha (8 kDa, Protein from Green alga, Protococcus salinus)
- Diacyl glycerol (625 Da, Ligand)
- (1~{s})-3,5,5-trimethyl-4-[(1~{e},3~{e},5~{e},7~{e},9~{e},11~{e},13~{e},15~{e},17~{e})-3,7,12,16-tetramethyl-18-[(4~{s})-2,6,6-trimethyl-4-oxidanyl-cyclohexen-1-yl]octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]cyclohex-3-en-1-ol (568 Da, Ligand)
- 1,2-dipalmitoyl-phosphatidyl-glycerole (722 Da, Ligand)
- Dodecyl-beta-d-maltoside (510 Da, Ligand)
- Sphingosine (299 Da, Ligand)
- (2s)-3-{[(r)-(2-aminoethoxy)(hydroxy)phosphoryl]oxy}-2-hydroxypropyl hexadecanoate (453 Da, Ligand)
- Photosystem ii reaction center protein ycf12 (3 kDa, Protein from Green alga, Protococcus salinus)
Unstacked compact Dunaliella PSII
Resolution: 3.61 Å
EM Method: Single-particle
Fitted PDBs: 7pnk
Q-score: 0.381
Caspy I, Fadeeva M, Mazor Y, Nelson N
eLife (2023) 12 [ Pubmed: 36799903 DOI: doi:10.7554/eLife.81150 ]
- Fe (ii) ion (55 Da, Ligand)
- Photosystem ii reaction center protein z (6 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein l (4 kDa, Protein from Dunaliella salina)
- Trimethyl-[(2~{r})-1-oxidanyl-1-oxidanylidene-4-[(2~{s})-2-[(1~{s})-1-oxidanyloctadecoxy]-3-[(1~{r})-1-oxidanyloctadecoxy]propoxy]butan-2-yl]azanium (773 Da, Ligand)
- (1r,3r)-6-{(3e,5e,7e,9e,11e,13e,15e,17e)-18-[(1s,4r,6r)-4-hydroxy-2,2,6-trimethyl-7-oxabicyclo[4.1.0]hept-1-yl]-3,7,12,16-tetramethyloctadeca-1,3,5,7,9,11,13,15,17-nonaenylidene}-1,5,5-trimethylcyclohexane-1,3-diol (600 Da, Ligand)
- Psbp (20 kDa, Protein from Green alga, Protococcus salinus)
- Chlorophyll a (893 Da, Ligand)
- Chlorophyll b (907 Da, Ligand)
- 1,2-distearoyl-monogalactosyl-diglyceride (787 Da, Ligand)
- 1,2-diacyl-glycerol-3-sn-phosphate (704 Da, Ligand)
- 2,3-dimethyl-5-(3,7,11,15,19,23,27,31,35-nonamethyl-2,6,10,14,18,22,26,30,34-hexatriacontanonaenyl-2,5-cyclohexadiene-1,4-dione-2,3-dimethyl-5-solanesyl-1,4-benzoquinone (749 Da, Ligand)
- 1,2-dipalmitoyl-phosphatidyl-glycerole (722 Da, Ligand)
- (3r,3'r,6s)-4,5-didehydro-5,6-dihydro-beta,beta-carotene-3,3'-diol (568 Da, Ligand)
- Psbw (4 kDa, Protein from Green alga, Protococcus salinus)
- Beta-carotene (536 Da, Ligand)
- Photosystem ii cp43 reaction center protein (49 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein i (3 kDa, Protein from Dunaliella salina)
- Psbx (2 kDa, Protein from Green alga, Protococcus salinus)
- Pheophytin a (871 Da, Ligand)
- Sphingosine (299 Da, Ligand)
- Tripalmitoylglycerol (807 Da, Ligand)
- Cp26 (26 kDa, Protein from Green alga, Protococcus salinus)
- Photosystem ii reaction center protein t (3 kDa, Protein from Dunaliella salina)
- Chlorophyll a-b binding protein, chloroplastic (23 kDa, Protein from Dunaliella salina)
- Cytochrome b559 subunit beta (3 kDa, Protein from Dunaliella salina)
- (2s)-3-{[(r)-(2-aminoethoxy)(hydroxy)phosphoryl]oxy}-2-hydroxypropyl hexadecanoate (453 Da, Ligand)
- Ca-mn4-o5 cluster (339 Da, Ligand)
- (1~{s})-3,5,5-trimethyl-4-[(1~{e},3~{e},5~{e},7~{e},9~{e},11~{e},13~{e},15~{e},17~{e})-3,7,12,16-tetramethyl-18-[(4~{s})-2,6,6-trimethyl-4-oxidanyl-cyclohexen-1-yl]octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]cyclohex-3-en-1-ol (568 Da, Ligand)
- Chlorophyll a-b binding protein of lhcii type i, chloroplastic (24 kDa, Protein from Green alga, Protococcus salinus)
- Cytochrome b559 subunit alpha (8 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein j (3 kDa, Protein from Dunaliella salina)
- 1,2-di-o-acyl-3-o-[6-deoxy-6-sulfo-alpha-d-glucopyranosyl]-sn-glycerol (795 Da, Ligand)
- Photosystem ii reaction center protein h (7 kDa, Protein from Dunaliella salina)
- Diacyl glycerol (625 Da, Ligand)
- Photosystem ii d2 protein (38 kDa, Protein from Dunaliella salina)
- Photosystem ii protein d1 (37 kDa, Protein from Dunaliella salina)
- Digalactosyl diacyl glycerol (dgdg) (949 Da, Ligand)
- Protoporphyrin ix containing fe (616 Da, Ligand)
- Chloride ion (35 Da, Ligand)
- Phosphatidylethanolamine (734 Da, Ligand)
- Photosystem ii reaction center protein ycf12 (3 kDa, Protein from Dunaliella salina)
- Lhcii m1 (23 kDa, Protein from Green alga, Protococcus salinus)
- Photosystem ii reaction center protein k (4 kDa, Protein from Dunaliella salina)
- Photosystem ii reaction center protein m (3 kDa, Protein from Dunaliella salina)
- (3s,5r,6s,3's,5'r,6's)-5,6,5',6'-diepoxy-5,6,5',6'- tetrahydro-beta,beta-carotene-3,3'-diol (600 Da, Ligand)
- Dunaliella salina photosystem ii complex (Complex from Dunaliella salina)
- Glycerol (92 Da, Ligand)
- Psbu (3 kDa, Protein from Green alga, Protococcus salinus)
- Bicarbonate ion (61 Da, Ligand)
- (3r)-beta,beta-caroten-3-ol (552 Da, Ligand)
- Photosystem ii cp47 reaction center protein (53 kDa, Protein from Dunaliella salina)
- Psbo (25 kDa, Protein from Green alga, Protococcus salinus)
Red alga C.merolae Photosystem I
Resolution: 3.1 Å
EM Method: Single-particle
Fitted PDBs: 7blz
Q-score: 0.547
Nelson N, Klaiman D, Hippler M
To Be Published
- Photosystem i reaction center subunit xi (14 kDa, Protein from Red alga)
- Phylloquinone (450 Da, Ligand)
- Photosystem i iron-sulfur center (8 kDa, Protein from Red alga)
- Chlorophyll a isomer (893 Da, Ligand)
- Photosystem i reaction center subunit ix (4 kDa, Protein from Red alga)
- Chlorophyll a (893 Da, Ligand)
- Photosystem i (Complex from Cyanidioschyzon merolae strain 10D)
- 1,2-diacyl-glycerol-3-sn-phosphate (704 Da, Ligand)
- 1,2-dipalmitoyl-phosphatidyl-glycerole (722 Da, Ligand)
- Beta-carotene (536 Da, Ligand)
- Photosystem i p700 chlorophyll a apoprotein a1 (82 kDa, Protein from Red alga)
- Phosphatidylinositol (887 Da, Ligand)
- Photosystem i p700 chlorophyll a apoprotein a2 (15 kDa, Protein from Red alga)
- Calcium ion (40 Da, Ligand)
- Photosystem i reaction center subunit xii (2 kDa, Protein from Red alga)
- Similar to light harvesting protein (19 kDa, Protein from Red alga)
- Lhcr3 (19 kDa, Protein from Red alga)
- Photosystem i reaction center subunit viii (3 kDa, Protein from Red alga)
- (1~{s})-3,5,5-trimethyl-4-[(1~{e},3~{e},5~{e},7~{e},9~{e},11~{e},13~{e},15~{e},17~{e})-3,7,12,16-tetramethyl-18-[(4~{s})-2,6,6-trimethyl-4-oxidanyl-cyclohexen-1-yl]octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]cyclohex-3-en-1-ol (568 Da, Ligand)
- Psi-f (17 kDa, Protein from Red alga)
- Water (18 Da, Ligand)
- Photosystem i iron-sulfur center subunit vii (6 kDa, Protein from Red alga)
- Diacyl glycerol (625 Da, Ligand)
- Photosystem i p700 chlorophyll a apoprotein a2 (81 kDa, Protein from Red alga)
- Dodecyl-alpha-d-maltoside (510 Da, Ligand)
- Iron/sulfur cluster (351 Da, Ligand)
- Digalactosyl diacyl glycerol (dgdg) (949 Da, Ligand)
- (1s)-2-{[{[(2r)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(palmitoyloxy)methyl]ethyl stearate (751 Da, Ligand)
- Phosphatidylethanolamine (734 Da, Ligand)
- Psi-k (5 kDa, Protein from Red alga)
- (3r)-beta,beta-caroten-3-ol (552 Da, Ligand)
- Ergosterol (396 Da, Ligand)
- Similar to chlorophyll a/b-binding protein, cp24 (19 kDa, Protein from Red alga)
- Psao (10 kDa, Protein from Red alga)
Photosystem I of a temperature sensitive mutant Chlamydomonas reinhardtii
Resolution: 3.15 Å
EM Method: Single-particle
Fitted PDBs: 7blx
Q-score: 0.536
Caspy I, Schwartz T, Bayro-Kaiser V, Fadeeva M, Kessel A, Ben-Tal N, Nelson N
Commun Biol (2021) 4 pp. 1380- [ DOI: doi:10.1038/s42003-021-02911-7 ]
- Photosystem i reaction center subunit psak, chloroplastic (8 kDa, Protein from Chlamydomonas smithii)
- Phylloquinone (450 Da, Ligand)
- Chlorophyll a isomer (893 Da, Ligand)
- Chlorophyll a (893 Da, Ligand)
- (2r)-2-hydroxy-3-(phosphonooxy)propyl (9e)-octadec-9-enoate (436 Da, Ligand)
- Chlorophyll b (907 Da, Ligand)
- 1,2-distearoyl-monogalactosyl-diglyceride (787 Da, Ligand)
- Octanoic acid (caprylic acid) (144 Da, Ligand)
- 1,2-diacyl-glycerol-3-sn-phosphate (704 Da, Ligand)
- Chlorophyll a-b binding protein, chloroplastic (25 kDa, Protein from Chlamydomonas smithii)
- 1,2-dipalmitoyl-phosphatidyl-glycerole (722 Da, Ligand)
- (3r,3'r,6s)-4,5-didehydro-5,6-dihydro-beta,beta-carotene-3,3'-diol (568 Da, Ligand)
- Palmitic acid (256 Da, Ligand)
- Beta-carotene (536 Da, Ligand)
- Photosystem i reaction center subunit ii, chloroplastic (16 kDa, Protein from Chlamydomonas reinhardtii)
- Sphingosine (299 Da, Ligand)
- Chlorophyll a-b binding protein, chloroplastic (24 kDa, Protein from Chlamydomonas reinhardtii)
- Calcium ion (40 Da, Ligand)
- Photosystem i of temperature sensitive chlamydomonas reinhardtii (890 kDa, Complex from Chlamydomonas reinhardtii)
- Lauric acid (200 Da, Ligand)
- Chlorophyll a-b binding protein, chloroplastic (23 kDa, Protein from Chlamydomonas smithii)
- (2s)-3-{[(r)-(2-aminoethoxy)(hydroxy)phosphoryl]oxy}-2-hydroxypropyl hexadecanoate (453 Da, Ligand)
- Photosystem i p700 chlorophyll a apoprotein a1 (82 kDa, Protein from Chlamydomonas reinhardtii)
- Chlorophyll a-b binding protein, chloroplastic (23 kDa, Protein from Chlamydomonas smithii)
- (1~{s})-3,5,5-trimethyl-4-[(1~{e},3~{e},5~{e},7~{e},9~{e},11~{e},13~{e},15~{e},17~{e})-3,7,12,16-tetramethyl-18-[(4~{s})-2,6,6-trimethyl-4-oxidanyl-cyclohexen-1-yl]octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]cyclohex-3-en-1-ol (568 Da, Ligand)
- Psi subunit v (12 kDa, Protein from Chlamydomonas reinhardtii)
- Photosystem i reaction center subunit iii, chloroplastic (17 kDa, Protein from Chlamydomonas reinhardtii)
- Chlorophyll a-b binding protein, chloroplastic (23 kDa, Protein from Chlamydomonas reinhardtii)
- Chlorophyll a-b binding protein, chloroplastic (23 kDa, Protein from Chlamydomonas smithii)
- Photosystem i reaction center subunit iv, chloroplastic (7 kDa, Protein from Chlamydomonas reinhardtii)
- Water (18 Da, Ligand)
- Photosystem i reaction center subunit v, chloroplastic (9 kDa, Protein from Chlamydomonas reinhardtii)
- 1,2-di-o-acyl-3-o-[6-deoxy-6-sulfo-alpha-d-glucopyranosyl]-sn-glycerol (795 Da, Ligand)
- Diacyl glycerol (625 Da, Ligand)
- Chlorophyll a-b binding protein, chloroplastic (20 kDa, Protein from Chlamydomonas reinhardtii)
- Iron/sulfur cluster (351 Da, Ligand)
- Digalactosyl diacyl glycerol (dgdg) (949 Da, Ligand)
- Photosystem i iron-sulfur center (8 kDa, Protein from Chlamydomonas reinhardtii)
- Photosystem i reaction center subunit ix (4 kDa, Protein from Chlamydomonas reinhardtii)
- Photosystem i reaction center subunit viii (3 kDa, Protein from Chlamydomonas reinhardtii)
- Photosystem i p700 chlorophyll a apoprotein a2 (81 kDa, Protein from Chlamydomonas smithii)
- (3~{e},5~{e},7~{e})-6-methyl-8-[(6~{r})-2,2,6-trimethylcyclohexyl]octa-3,5,7-trien-2-one (260 Da, Ligand)
- (3r)-beta,beta-caroten-3-ol (552 Da, Ligand)
- Dodecyl-beta-d-maltoside (510 Da, Ligand)