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6QW6

Structure of the human U5.U4/U6 tri-snRNP at 2.9A resolution.

This is a non-PDB format compatible entry.
Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A
(X)
U4/U6.U5 small nuclear ribonucleoprotein 27 kDa proteinpolymer15518915.41UniProt (Q8WVK2)
Pfam (PF08648)
Homo sapiens (Human)U4/U6.U5-27K,Nucleic acid-binding protein RY-1,U4/U6.U5 tri-snRNP-associated 27 kDa protein,27K,U4/U6.U5 tri-snRNP-associated protein 3
2B
(4)
U4 snRNApolymer14646997.71Homo sapiens (Human)
3C, O
(41, 51)
Small nuclear ribonucleoprotein Sm D1polymer11913310.72UniProt (P62314)
Pfam (PF01423)
Homo sapiens (Human)Sm-D1,Sm-D autoantigen,snRNP core protein D1
4D, P
(42, 52)
Small nuclear ribonucleoprotein Sm D2polymer11813551.92UniProt (P62316)
Pfam (PF01423)
Homo sapiens (Human)Sm-D2,snRNP core protein D2
5E, Q
(43, 53)
Small nuclear ribonucleoprotein Sm D3polymer12613940.32UniProt (P62318)
Pfam (PF01423)
Homo sapiens (Human)Sm-D3,snRNP core protein D3
6F
(4A)
U4/U6 small nuclear ribonucleoprotein Prp3polymer68377669.21UniProt (O43395)
Pfam (PF01480)
Pfam (PF08572)
Pfam (PF06544)
Homo sapiens (Human)Pre-mRNA-splicing factor 3,hPrp3,U4/U6 snRNP 90 kDa protein
7G
(4B)
U4/U6 small nuclear ribonucleoprotein Prp4polymer52258536.11UniProt (O43172)
Pfam (PF00400)
Pfam (PF08799)
Homo sapiens (Human)PRP4 homolog,hPrp4,U4/U6 snRNP 60 kDa protein,WD splicing factor Prp4
8H
(4C)
U4/U6 small nuclear ribonucleoprotein Prp31polymer49955529.01UniProt (Q8WWY3)
Pfam (PF01798)
Pfam (PF09785)
Homo sapiens (Human)Pre-mRNA-processing factor 31,Serologically defined breast cancer antigen NY-BR-99,U4/U6 snRNP 61 kDa protein,hPrp31
9I
(4D)
NHP2-like protein 1polymer12814191.51UniProt (P55769)
Pfam (PF01248)
Homo sapiens (Human)High mobility group-like nuclear protein 2 homolog 1,OTK27,SNU13 homolog,hSNU13,U4/U6.U5 small nuclear ribonucleoprotein SNU13,U4/U6.U5 tri-snRNP 15.5 kDa protein
10J, Y
(4b, 5b)
Small nuclear ribonucleoprotein-associated proteins B and B'polymer24024642.12UniProt (P14678)
Pfam (PF01423)
Homo sapiens (Human)snRNP-B,Sm protein B/B',SmB/B'
11K, Z
(4e, 5e)
Small nuclear ribonucleoprotein Epolymer9210817.62UniProt (P62304)
Pfam (PF01423)
Homo sapiens (Human)snRNP-E,Sm protein E,SmE
12AA, L
(4f, 5f)
Small nuclear ribonucleoprotein Fpolymer869734.22UniProt (P62306)
Pfam (PF01423)
Homo sapiens (Human)snRNP-F,Sm protein F,SmF
13BA, M
(4g, 5g)
Small nuclear ribonucleoprotein Gpolymer768508.12UniProt (P62308)
Pfam (PF01423)
Homo sapiens (Human)snRNP-G,Sm protein G,SmG
14N
(5)
U5 snRNApolymer11737254.91Homo sapiens (Human)
15R
(5A)
Pre-mRNA-processing-splicing factor 8polymer2311271508.31UniProt (Q6P2Q9)
Pfam (PF08082)
Pfam (PF08083)
Pfam (PF10598)
Pfam (PF10597)
Pfam (PF10596)
Pfam (PF12134)
Pfam (PF01398)
Pfam (PF08084)
Homo sapiens (Human)220 kDa U5 snRNP-specific protein,PRP8 homolog,Splicing factor Prp8,p220
16S
(5B)
U5 small nuclear ribonucleoprotein 200 kDa helicasepolymer2136244823.41UniProt (O75643)
Pfam (PF21188)
Pfam (PF18149)
Pfam (PF00270)
Pfam (PF00271)
Pfam (PF23445)
Pfam (PF02889)
Homo sapiens (Human)Activating signal cointegrator 1 complex subunit 3-like 1,BRR2 homolog,U5 snRNP-specific 200 kDa protein,U5-200KD
17T
(5C)
116 kDa U5 small nuclear ribonucleoprotein componentpolymer85395836.81UniProt (Q15029)
Pfam (PF00009)
Pfam (PF03144)
Pfam (PF14492)
Pfam (PF03764)
Pfam (PF00679)
Homo sapiens (Human)Elongation factor Tu GTP-binding domain-containing protein 2,SNU114 homolog,hSNU114,U5 snRNP-specific protein,116 kDa,U5-116 kDa
18U
(5D)
Thioredoxin-like protein 4Apolymer14216807.31UniProt (P83876)
Pfam (PF02966)
Homo sapiens (Human)DIM1 protein homolog,Spliceosomal U5 snRNP-specific 15 kDa protein,Thioredoxin-like U5 snRNP protein U5-15kD
19V
(5J)
Pre-mRNA-processing factor 6polymer941107092.21UniProt (O94906)
Pfam (PF06424)
Pfam (PF14559)
Pfam (PF13432)
Homo sapiens (Human)Androgen receptor N-terminal domain-transactivating protein 1,ANT-1,PRP6 homolog,U5 snRNP-associated 102 kDa protein,U5-102 kDa protein
20W
(5O)
U5 small nuclear ribonucleoprotein 40 kDa proteinpolymer35739359.51UniProt (Q96DI7)
Pfam (PF00400)
Homo sapiens (Human)U5-40K,38 kDa-splicing factor,Prp8-binding protein,hPRP8BP,U5 snRNP-specific 40 kDa protein,WD repeat-containing protein 57
21X
(5X)
Probable ATP-dependent RNA helicase DDX23polymer82095785.11UniProt (Q9BUQ8)
Pfam (PF25430)
Pfam (PF00270)
Pfam (PF00271)
Homo sapiens (Human)100 kDa U5 snRNP-specific protein,DEAD box protein 23,PRP28 homolog,U5-100kD
22CA
(6)
U6 snRNApolymer8828342.91Homo sapiens (Human)
23DA
(62)
U6 snRNA-associated Sm-like protein LSm2polymer9510847.51UniProt (Q9Y333)
Pfam (PF01423)
Homo sapiens (Human)Protein G7b,Small nuclear ribonuclear protein D homolog,snRNP core Sm-like protein Sm-x5
24EA
(63)
U6 snRNA-associated Sm-like protein LSm3polymer10211859.41UniProt (P62310)
Pfam (PF01423)
Homo sapiens (Human)
25FA
(64)
U6 snRNA-associated Sm-like protein LSm4polymer13915375.81UniProt (Q9Y4Z0)
Pfam (PF01423)
Homo sapiens (Human)Glycine-rich protein,GRP
26GA
(65)
U6 snRNA-associated Sm-like protein LSm5polymer919945.41UniProt (Q9Y4Y9)
Pfam (PF01423)
Homo sapiens (Human)
27HA
(66)
U6 snRNA-associated Sm-like protein LSm6polymer809139.61UniProt (P62312)
Pfam (PF01423)
Homo sapiens (Human)
28IA
(67)
U6 snRNA-associated Sm-like protein LSm7polymer10311617.41UniProt (Q9UK45)
Pfam (PF01423)
Homo sapiens (Human)
29JA
(68)
U6 snRNA-associated Sm-like protein LSm8polymer9610410.61UniProt (O95777)
Pfam (PF01423)
Homo sapiens (Human)
30KA
(R)
RNA-binding protein 42polymer48050477.91UniProt (Q9BTD8)
Pfam (PF00076)
Homo sapiens (Human)RNA-binding motif protein 42
31LA
(S)
U4/U6.U5 tri-snRNP-associated protein 1polymer80090414.11UniProt (O43290)
Pfam (PF19252)
Pfam (PF03343)
Homo sapiens (Human)SNU66 homolog,hSnu66,Squamous cell carcinoma antigen recognized by T-cells 1,hSART-1,U4/U6.U5 tri-snRNP-associated 110 kDa protein
32MA
(U)
U4/U6.U5 tri-snRNP-associated protein 2polymer55564408.41UniProt (Q53GS9)
Pfam (PF02148)
Pfam (PF00443)
Homo sapiens (Human)Inactive ubiquitin-specific peptidase 39,SAD1 homolog,U4/U6.U5 tri-snRNP-associated 65 kDa protein,65K
33NA
(5A)
INOSITOL HEXAKISPHOSPHATEnon-polymer660.01Chemie (IHP)
34OA
(5C)
MAGNESIUM IONnon-polymer24.31Chemie (MG)
35PA
(5C)
GUANOSINE-5'-TRIPHOSPHATEnon-polymer523.21Chemie (GTP)
36QA
(U)
ZINC IONnon-polymer65.41Chemie (ZN)
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains39
Total formula weight1682155.3
Non-Polymers*Number of molecules4
Total formula weight1272.9
All*Total formula weight1683428.3
*Water molecules are not included.

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PDB entries from 2026-01-21

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