Structure analysis

Cryo-EM structure of the human spliceosome just prior to exon ligation at 3.6 angstrom

Electron Microscopy
3.6Å resolution
Source organism: Homo sapiens
Assembly composition:
hetero 50-mer (preferred)
Entry contents: 36 distinct polypeptide molecules
4 distinct RNA molecules

Assemblies

Assembly 1 (preferred)
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Multimeric state: hetero 50-mer
Accessible surface area: 619244.53 Å2
Buried surface area: 234130.04 Å2
Dissociation area: 1,483.94 Å2
Dissociation energy (ΔGdiss): -13.65 kcal/mol
Dissociation entropy (TΔSdiss): 27.66 kcal/mol
Symmetry number: 1
PDBe Complex ID: PDB-CPX-127362

Macromolecules

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Chain: E
Length: 357 amino acids
Theoretical weight: 39.36 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: Q96DI7 (Residues: 1-357; Coverage: 100%)
Gene names: PRP8BP, SFP38, SNRNP40, WDR57
Pfam: WD domain, G-beta repeat
InterPro:

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Chain: I
Length: 855 amino acids
Theoretical weight: 100.15 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: Q9HCS7 (Residues: 1-855; Coverage: 100%)
Gene names: HCNP, KIAA1177, PP3898, SYF1, XAB2
Pfam: Tetratricopeptide repeat
InterPro:

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Chain: J
Length: 848 amino acids
Theoretical weight: 100.61 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: Q9BZJ0 (Residues: 1-848; Coverage: 100%)
Gene names: CGI-201, CRN, CRNKL1, MSTP021
Pfam: HAT (Half-A-TPR) repeat
InterPro:

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Chain: K
Length: 225 amino acids
Theoretical weight: 26.16 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: O75934 (Residues: 1-225; Coverage: 100%)
Gene names: BCAS2, DAM1
Pfam: Breast carcinoma amplified sequence 2 (BCAS2)
InterPro: Pre-mRNA-splicing factor SPF27

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Chain: M
Length: 243 amino acids
Theoretical weight: 28.78 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: O95926 (Residues: 1-243; Coverage: 100%)
Gene names: CBPIN, GCIPIP, SYF2
Pfam: SYF2 splicing factor
InterPro: mRNA splicing factor SYF2

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Chain: N
Length: 144 amino acids
Theoretical weight: 17.03 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: P41223 (Residues: 1-144; Coverage: 100%)
Gene names: BUD31, EDG2
Pfam: Pre-mRNA-splicing factor BUD31
InterPro:

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Chain: P
Length: 229 amino acids
Theoretical weight: 26.67 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: Q9P013 (Residues: 1-229; Coverage: 100%)
Gene names: AD-002, C11orf5, CWC15, HSPC148
Pfam: Cwf15/Cwc15 cell cycle control protein
InterPro: Pre-mRNA-splicing factor Cwf15/Cwc15

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Chain: R
Length: 536 amino acids
Theoretical weight: 61.77 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: Q13573 (Residues: 1-536; Coverage: 100%)
Gene names: SKIIP, SKIP, SNW1
Pfam: SKIP/SNW domain
InterPro:

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Chain: T
Length: 514 amino acids
Theoretical weight: 57.28 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: O43660 (Residues: 1-514; Coverage: 100%)
Gene name: PLRG1
Pfam: WD domain, G-beta repeat
InterPro:

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Chain: U
Length: 2752 amino acids
Theoretical weight: 300.26 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: Q9UQ35 (Residues: 1-2752; Coverage: 100%)
Gene names: HSPC075, KIAA0324, SRL300, SRM300, SRRM2
Pfam: cwf21 domain
InterPro:

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Chain: V
Length: 908 amino acids
Theoretical weight: 105.65 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: Q9HCG8 (Residues: 1-908; Coverage: 100%)
Gene names: CWC22, KIAA1604, NCM
Pfam:
InterPro:

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Chain: W
Length: 579 amino acids
Theoretical weight: 65.61 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: O60508 (Residues: 1-579; Coverage: 100%)
Gene names: CDC40, EHB3, PRP17, PRPF17
Pfam: WD domain, G-beta repeat
InterPro:

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Chain: X
Length: 184 amino acids
Theoretical weight: 21.04 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: Q9H875 (Residues: 1-184; Coverage: 100%)
Gene name: PRKRIP1
Pfam: Protein of unknown function (DUF1168)
InterPro: PRKR-interacting protein 1

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Chain: Z
Length: 586 amino acids
Theoretical weight: 68.51 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: O95391 (Residues: 1-586; Coverage: 100%)
Gene name: SLU7
Pfam: Pre-mRNA splicing Prp18-interacting factor
InterPro:

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Chains: a, h
Length: 126 amino acids
Theoretical weight: 13.94 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: P62318 (Residues: 1-126; Coverage: 100%)
Gene name: SNRPD3
Pfam: LSM domain
InterPro:

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Chains: b, i
Length: 231 amino acids
Theoretical weight: 23.69 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: P14678 (Residues: 1-229; Coverage: 95%)
  • Best match: P14678-2 (Residues: 1-231)
Gene names: COD, SNRPB, SNRPB1
Pfam: LSM domain
InterPro:

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Chains: c, j
Length: 119 amino acids
Theoretical weight: 13.31 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: P62314 (Residues: 1-119; Coverage: 100%)
Gene name: SNRPD1
Pfam: LSM domain
InterPro:

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Chains: d, k
Length: 118 amino acids
Theoretical weight: 13.55 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: P62316 (Residues: 1-118; Coverage: 100%)
Gene names: SNRPD1, SNRPD2
Pfam: LSM domain
InterPro:

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Chains: f, m
Length: 86 amino acids
Theoretical weight: 9.73 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: P62306 (Residues: 1-86; Coverage: 100%)
Gene names: PBSCF, SNRPF
Pfam: LSM domain
InterPro:

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Chains: e, l
Length: 92 amino acids
Theoretical weight: 10.82 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: P62304 (Residues: 1-92; Coverage: 100%)
Gene name: SNRPE
Pfam: LSM domain
InterPro:

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Chains: g, n
Length: 76 amino acids
Theoretical weight: 8.51 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: P62308 (Residues: 1-76; Coverage: 100%)
Gene names: PBSCG, SNRPG
Pfam: LSM domain
InterPro:

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Chain: o
Length: 255 amino acids
Theoretical weight: 28.46 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: P09661 (Residues: 1-255; Coverage: 100%)
Gene name: SNRPA1
Pfam: Leucine-rich repeat
InterPro:

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Chain: v
Length: 148 amino acids
Theoretical weight: 17.3 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: Q96A72 (Residues: 1-148; Coverage: 100%)
Gene names: MAGOH2, MAGOHB
Pfam: Mago nashi protein
InterPro:

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Chain: w
Length: 174 amino acids
Theoretical weight: 19.93 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: Q9Y5S9 (Residues: 1-174; Coverage: 100%)
Gene names: HSPC114, MDS014, RBM8, RBM8A
Pfam: RNA recognition motif
InterPro:

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Chain: x
Length: 703 amino acids
Theoretical weight: 76.38 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: O15234 (Residues: 1-703; Coverage: 100%)
Gene names: CASC3, MLN51
Pfam: CASC3/Barentsz eIF4AIII binding
InterPro:

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Name: U5 snRNA
Representative chains: B
Length: 117 nucleotides
Theoretical weight: 37.25 KDa
Rfam: U5 spliceosomal RNA

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Name: U6 snRNA
Representative chains: F
Length: 107 nucleotides
Theoretical weight: 34.4 KDa
Rfam: U6 spliceosomal RNA

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Name: pre-mRNA
Representative chains: G
Length: 275 nucleotides
Theoretical weight: 87.98 KDa

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Name: Homo sapiens small nuclear RNA (U2) gene
Representative chains: H
Length: 188 nucleotides
Theoretical weight: 60.19 KDa
Rfam: U2 spliceosomal RNA

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