Cryo-EM structure of CPD-stalled Pol II in complex with Rad26 (engaged state)
Resolution: 3.5 Å
EM Method: Single-particle
Fitted PDBs: 8tug
Q-score: 0.382
Sarsam RD, Xu J, Lahiri I, Gong W, Li Q, Oh J, Zhou Z, Hou P, Chong J, Hao N, Li S, Wang D, Leschziner AE
PNAS (2024) 121 pp. e2314245121-e2314245121 [ Pubmed: 38194460 DOI: doi:10.1073/pnas.2314245121 ]
- Dna (ts) (14 kDa, DNA from synthetic construct)
- Cryo-em structure of cpd lesion containing rna polymerase ii elongation complex with rad26 (engaged state) (Complex from Saccharomyces cerevisiae)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc3 (16 kDa, Protein from Saccharomyces cerevisiae)
- Zinc ion (65 Da, Ligand)
- Dna-directed rna polymerase ii subunit rpb3 (35 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb4 (25 kDa, Protein from Saccharomyces cerevisiae)
- Dna repair and recombination protein rad26 (42 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases ii subunit rpabc5 (8 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase subunit beta (138 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb7 (19 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc2 (17 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb11 (13 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc1 (25 kDa, Protein from Saccharomyces cerevisiae)
- Rna (3 kDa, RNA from synthetic construct)
- Dna-directed rna polymerase ii subunit rpb9 (14 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases ii subunit rpabc4 (7 kDa, Protein from Saccharomyces cerevisiae)
- Magnesium ion (24 Da, Ligand)
- Dna-directed rna polymerase ii subunit rpb1 (191 kDa, Protein from Saccharomyces cerevisiae)
- Dna (nts) (14 kDa, DNA from synthetic construct)
Cryo-EM structure of CPD-stalled Pol II in complex with Rad26 (open state)
Resolution: 3.7 Å
EM Method: Single-particle
Fitted PDBs: 8tvp
Q-score: 0.357
Sarsam RD, Xu J, Lahiri I, Gong W, Li Q, Oh J, Zhou Z, Hou P, Chong J, Hao N, Li S, Wang D, Leschziner AE
PNAS (2024) 121 pp. e2314245121-e2314245121 [ Pubmed: 38194460 DOI: doi:10.1073/pnas.2314245121 ]
- Dna (ts) (14 kDa, DNA from synthetic construct)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc3 (16 kDa, Protein from Saccharomyces cerevisiae)
- Zinc ion (65 Da, Ligand)
- Dna-directed rna polymerase ii subunit rpb3 (35 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb4 (25 kDa, Protein from Saccharomyces cerevisiae)
- Dna repair and recombination protein rad26 (36 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases ii subunit rpabc5 (8 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase subunit beta (138 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb7 (19 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc2 (17 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb11 (13 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc1 (25 kDa, Protein from Saccharomyces cerevisiae)
- Rna (3 kDa, RNA from synthetic construct)
- Dna-directed rna polymerase ii subunit rpb9 (14 kDa, Protein from Saccharomyces cerevisiae)
- Cryo-em structure of cpd lesion containing rna polymerase ii elongation complex with rad26 (Complex from Saccharomyces cerevisiae)
- Dna-directed rna polymerases ii subunit rpabc4 (7 kDa, Protein from Saccharomyces cerevisiae)
- Magnesium ion (24 Da, Ligand)
- Dna-directed rna polymerase ii subunit rpb1 (191 kDa, Protein from Saccharomyces cerevisiae)
- Dna (nts) (14 kDa, DNA from synthetic construct)
Cryo-EM structure of CPD stalled 10-subunit Pol II in complex with Rad26
Resolution: 4.6 Å
EM Method: Single-particle
Fitted PDBs: 8tvq
Q-score: 0.247
Sarsam RD, Xu J, Lahiri I, Gong W, Li Q, Oh J, Zhou Z, Hou P, Chong J, Hao N, Li S, Wang D, Leschziner AE
PNAS (2024) 121 pp. e2314245121-e2314245121 [ Pubmed: 38194460 DOI: doi:10.1073/pnas.2314245121 ]
- Dna (ts) (14 kDa, DNA from synthetic construct)
- Dna repair and recombination protein rad26 (36 kDa, Protein from Saccharomyces cerevisiae)
- Zinc ion (65 Da, Ligand)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc2 (17 kDa, Protein from Saccharomyces cerevisiae)
- Rna (3 kDa, RNA from synthetic construct)
- Dna-directed rna polymerase ii subunit rpb9 (14 kDa, Protein from Saccharomyces cerevisiae)
- Cryo-em structure of cpd lesion containing 10 subunit rna polymerase ii elongation complex with rad26 (Complex from Saccharomyces cerevisiae)
- Dna-directed rna polymerases ii subunit rpabc5 (8 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb11 (13 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases ii subunit rpabc4 (7 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase subunit beta (138 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc3 (16 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb1 (191 kDa, Protein from Saccharomyces cerevisiae)
- Magnesium ion (24 Da, Ligand)
- Dna-directed rna polymerase ii subunit rpb3 (35 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc1 (25 kDa, Protein from Saccharomyces cerevisiae)
- Dna (nts) (14 kDa, DNA from synthetic construct)
Cryo-EM structure of backtracked Pol II in complex with Rad26
Resolution: 4.4 Å
EM Method: Single-particle
Fitted PDBs: 8tvs
Q-score: 0.305
Sarsam RD, Xu J, Lahiri I, Gong W, Li Q, Oh J, Zhou Z, Hou P, Chong J, Hao N, Li S, Wang D, Leschziner AE
PNAS (2024) 121 pp. e2314245121-e2314245121 [ Pubmed: 38194460 DOI: doi:10.1073/pnas.2314245121 ]
- Dna (ts) (14 kDa, DNA from synthetic construct)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc3 (16 kDa, Protein from Saccharomyces cerevisiae)
- Zinc ion (65 Da, Ligand)
- Dna-directed rna polymerase ii subunit rpb3 (35 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb4 (25 kDa, Protein from Saccharomyces cerevisiae)
- Dna repair and recombination protein rad26 (36 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases ii subunit rpabc5 (8 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase subunit beta (138 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb7 (19 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc2 (17 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb11 (13 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase subunit (191 kDa, Protein from Saccharomyces cerevisiae)
- Cryo-em structure of backtracked rna polymerase ii elongation complex with rad26 (Complex from Saccharomyces cerevisiae)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc1 (25 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb9 (14 kDa, Protein from Saccharomyces cerevisiae)
- Rna (5 kDa, RNA from synthetic construct)
- Dna-directed rna polymerases ii subunit rpabc4 (7 kDa, Protein from Saccharomyces cerevisiae)
- Magnesium ion (24 Da, Ligand)
- Dna (nts) (14 kDa, DNA from synthetic construct)
Cryo-EM structure of backtracked Pol II
Resolution: 3.7 Å
EM Method: Single-particle
Fitted PDBs: 8tvv
Q-score: 0.37
Sarsam RD, Xu J, Lahiri I, Gong W, Li Q, Oh J, Zhou Z, Hou P, Chong J, Hao N, Li S, Wang D, Leschziner AE
PNAS (2024) 121 pp. e2314245121-e2314245121 [ Pubmed: 38194460 DOI: doi:10.1073/pnas.2314245121 ]
- Dna (ts) (14 kDa, DNA from synthetic construct)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc1 (25 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb7 (19 kDa, Protein from Saccharomyces cerevisiae)
- Zinc ion (65 Da, Ligand)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc2 (17 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb9 (14 kDa, Protein from Saccharomyces cerevisiae)
- Rna (5 kDa, RNA from synthetic construct)
- Dna-directed rna polymerases ii subunit rpabc4 (7 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases ii subunit rpabc5 (8 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb11 (13 kDa, Protein from Saccharomyces cerevisiae)
- Magnesium ion (24 Da, Ligand)
- Dna-directed rna polymerase subunit beta (138 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc3 (16 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb1 (191 kDa, Protein from Saccharomyces cerevisiae)
- Dna (nts) (14 kDa, DNA from synthetic construct)
- Cryo-em structure of backtracked rna polymerase ii elongation complex with rad26 (Complex from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb3 (35 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb4 (25 kDa, Protein from Saccharomyces cerevisiae)
Cryo-EM structure of CPD-stalled Pol II (conformation 1)
Resolution: 3.6 Å
EM Method: Single-particle
Fitted PDBs: 8tvw
Q-score: 0.385
Sarsam RD, Xu J, Lahiri I, Gong W, Li Q, Oh J, Zhou Z, Hou P, Chong J, Hao N, Li S, Wang D, Leschziner AE
PNAS (2024) 121 pp. e2314245121-e2314245121 [ Pubmed: 38194460 DOI: doi:10.1073/pnas.2314245121 ]
- Dna-directed rna polymerases i, ii, and iii subunit rpabc1 (25 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb7 (19 kDa, Protein from Saccharomyces cerevisiae)
- Zinc ion (65 Da, Ligand)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc2 (17 kDa, Protein from Saccharomyces cerevisiae)
- Rna (3 kDa, RNA from synthetic construct)
- Dna-directed rna polymerase ii subunit rpb9 (14 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases ii subunit rpabc4 (7 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases ii subunit rpabc5 (8 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb11 (13 kDa, Protein from Saccharomyces cerevisiae)
- Magnesium ion (24 Da, Ligand)
- Dna-directed rna polymerase subunit beta (138 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc3 (16 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb1 (191 kDa, Protein from Saccharomyces cerevisiae)
- Dna (nts) (14 kDa, DNA from synthetic construct)
- Cryo-em structure of rna polymerase ii elongation complex containing cpd lesion (Complex from Saccharomyces cerevisiae)
- Dna (ts) (14 kDa, DNA from synthetic construct)
- Dna-directed rna polymerase ii subunit rpb3 (35 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb4 (25 kDa, Protein from Saccharomyces cerevisiae)
Cryo-EM structure of CPD-stalled Pol II (Conformation 2)
Resolution: 3.7 Å
EM Method: Single-particle
Fitted PDBs: 8tvx
Q-score: 0.359
Sarsam RD, Xu J, Lahiri I, Gong W, Li Q, Oh J, Zhou Z, Hou P, Chong J, Hao N, Li S, Wang D, Leschziner AE
PNAS (2024) 121 pp. e2314245121-e2314245121 [ Pubmed: 38194460 DOI: doi:10.1073/pnas.2314245121 ]
- Dna-directed rna polymerases i, ii, and iii subunit rpabc1 (25 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb7 (19 kDa, Protein from Saccharomyces cerevisiae)
- Zinc ion (65 Da, Ligand)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc2 (17 kDa, Protein from Saccharomyces cerevisiae)
- Rna (3 kDa, RNA from synthetic construct)
- Dna-directed rna polymerase ii subunit rpb9 (14 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases ii subunit rpabc4 (7 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases ii subunit rpabc5 (8 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb11 (13 kDa, Protein from Saccharomyces cerevisiae)
- Magnesium ion (24 Da, Ligand)
- Dna-directed rna polymerase subunit beta (138 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc3 (16 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb1 (191 kDa, Protein from Saccharomyces cerevisiae)
- Dna (nts) (14 kDa, DNA from synthetic construct)
- Cryo-em structure of rna polymerase ii elongation complex containing cpd lesion (Complex from Saccharomyces cerevisiae)
- Dna (ts) (14 kDa, DNA from synthetic construct)
- Dna-directed rna polymerase ii subunit rpb3 (35 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb4 (25 kDa, Protein from Saccharomyces cerevisiae)
Resolution: 3.1 Å
EM Method: Single-particle
Fitted PDBs: 8tvy
Q-score: 0.433
Sarsam RD, Xu J, Lahiri I, Gong W, Li Q, Oh J, Zhou Z, Hou P, Chong J, Hao N, Li S, Wang D, Leschziner AE
PNAS (2024) 121 pp. e2314245121-e2314245121 [ Pubmed: 38194460 DOI: doi:10.1073/pnas.2314245121 ]
- Dna (ts) (14 kDa, DNA from synthetic construct)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc3 (16 kDa, Protein from Saccharomyces cerevisiae)
- Rad26 isoform 1 (124 kDa, Protein from Saccharomyces cerevisiae)
- Zinc ion (65 Da, Ligand)
- Dna-directed rna polymerase ii subunit rpb3 (35 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb4 (25 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases ii subunit rpabc5 (8 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase subunit beta (138 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb7 (19 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc2 (17 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb11 (13 kDa, Protein from Saccharomyces cerevisiae)
- Cryo-em structure of cpd lesion containing rna polymerase ii elongation complex with rad26 and elf1 (closed state) (Complex from Saccharomyces cerevisiae)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc1 (25 kDa, Protein from Saccharomyces cerevisiae)
- Rna (3 kDa, RNA from synthetic construct)
- Dna-directed rna polymerase ii subunit rpb9 (14 kDa, Protein from Saccharomyces cerevisiae)
- Transcription elongation factor 1 homolog (9 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases ii subunit rpabc4 (7 kDa, Protein from Saccharomyces cerevisiae)
- Magnesium ion (24 Da, Ligand)
- Dna-directed rna polymerase ii subunit rpb1 (191 kDa, Protein from Saccharomyces cerevisiae)
- Dna (nts) (14 kDa, DNA from synthetic construct)
RNA polymerase II elongation complex arrested at a CPD lesion
Resolution: 3.1 Å
EM Method: Single-particle
Fitted PDBs: 6o6c
Q-score: 0.435
Lahiri I, Xu J, Han BG, Oh J, Wang D, DiMaio F, Leschziner AE
J Struct Biol (2019) 207 pp. 270-278 [ DOI: doi:10.1016/j.jsb.2019.06.004 Pubmed: 31200019 ]
- Rna polymerase ii elongation complex stalled at a cpd lesion (Complex from Saccharomyces cerevisiae)
- Rna (5'-r(p*ap*up*cp*gp*ap*gp*ap*gp*g)-3') (2 kDa, RNA from Saccharomyces cerevisiae)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc1 (25 kDa, Protein from Saccharomyces cerevisiae)
- Zinc ion (65 Da, Ligand)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc2 (17 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb9 (14 kDa, Protein from Saccharomyces cerevisiae)
- Dna (5'-d(p*gp*gp*ap*gp*ap*ap*gp*gp*ap*gp*cp*ap*gp*ap*gp*c)-3') (5 kDa, DNA from Saccharomyces cerevisiae)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc4 (7 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb11 (13 kDa, Protein from Saccharomyces cerevisiae)
- Dna (27-mer) (8 kDa, DNA from Saccharomyces cerevisiae)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc3 (16 kDa, Protein from Saccharomyces cerevisiae)
- Magnesium ion (24 Da, Ligand)
- Dna-directed rna polymerase ii subunit rpb1 (191 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb2 (138 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc5 (8 kDa, Protein from Saccharomyces cerevisiae)
- Dna-directed rna polymerase ii subunit rpb3 (35 kDa, Protein from Saccharomyces cerevisiae)
Ternary complex of RNA Pol II, transcription scaffold and Rad26
Resolution: 5.8 Å
EM Method: Single-particle
Fitted PDBs: 5vvr
Q-score: 0.174
Xu J, Lahiri I, Wang W, Wier A, Cianfrocco MA, Chong J, Hare AA, Dervan PB, DiMaio F, Leschziner AE, Wang D
Nature (2017) 551 pp. 653-657 [ DOI: doi:10.1038/nature24658 Pubmed: 29168508 ]
- Dna-directed rna polymerases i, ii, and iii subunit rpabc2 (17 kDa, Protein from Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
- Dna (nts) (14 kDa, DNA from Saccharomyces cerevisiae)
- Dna (ts) (14 kDa, DNA from Saccharomyces cerevisiae)
- Zinc ion (65 Da, Ligand)
- Ternary complex of rna pol ii, transcription scaffold and rad26 (Complex from Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
- Dna-directed rna polymerase ii subunit rpb11 (13 kDa, Protein from Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
- Dna-directed rna polymerases i, ii, and iii subunit rpabc4 (7 kDa, Protein from Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
- Dna-directed rna polymerases i, ii, and iii subunit rpabc5 (8 kDa, Protein from Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
- Dna-directed rna polymerase ii subunit rpb7 (19 kDa, Protein from Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
- Dna-directed rna polymerase ii subunit rpb9 (14 kDa, Protein from Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
- Dna-directed rna polymerase ii subunit rpb1 (191 kDa, Protein from Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
- Dna-directed rna polymerase ii subunit rpb2 (138 kDa, Protein from Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
- Rna (3 kDa, RNA from Saccharomyces cerevisiae)
- Dna-directed rna polymerases i, ii, and iii subunit rpabc1 (25 kDa, Protein from Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
- Dna-directed rna polymerase ii subunit rpb4 (25 kDa, Protein from Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
- Magnesium ion (24 Da, Ligand)
- Dna-directed rna polymerase ii subunit rpb3 (35 kDa, Protein from Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
- Dna repair and recombination protein rad26 (124 kDa, Protein from Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
- Dna-directed rna polymerases i, ii, and iii subunit rpabc3 (16 kDa, Protein from Saccharomyces cerevisiae (strain ATCC 204508 / S288c))