4PJO

Minimal U1 snRNP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.209 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of human U1 snRNP, a small nuclear ribonucleoprotein particle, reveals the mechanism of 5' splice site recognition.

Kondo, Y.Oubridge, C.van Roon, A.M.Nagai, K.

(2015) Elife 4

  • DOI: https://doi.org/10.7554/eLife.04986
  • Primary Citation of Related Structures:  
    4PJO, 4PKD

  • PubMed Abstract: 

    U1 snRNP binds to the 5' exon-intron junction of pre-mRNA and thus plays a crucial role at an early stage of pre-mRNA splicing. We present two crystal structures of engineered U1 sub-structures, which together reveal at atomic resolution an almost complete network of protein-protein and RNA-protein interactions within U1 snRNP, and show how the 5' splice site of pre-mRNA is recognised by U1 snRNP. The zinc-finger of U1-C interacts with the duplex between pre-mRNA and the 5'-end of U1 snRNA. The binding of the RNA duplex is stabilized by hydrogen bonds and electrostatic interactions between U1-C and the RNA backbone around the splice junction but U1-C makes no base-specific contacts with pre-mRNA. The structure, together with RNA binding assays, shows that the selection of 5'-splice site nucleotides by U1 snRNP is achieved predominantly through basepairing with U1 snRNA whilst U1-C fine-tunes relative affinities of mismatched 5'-splice sites.


  • Organizational Affiliation

    Structural Studies Division, MRC Laboratory of Molecular Biology, Cambridge, United Kingdom.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Small nuclear ribonucleoprotein Sm D3A,
HA [auth o],
L [auth a],
W [auth O]
126Homo sapiensMutation(s): 0 
Gene Names: SNRPD3
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Find proteins for P62318 (Homo sapiens)
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PHAROS:  P62318
GTEx:  ENSG00000100028 
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UniProt GroupP62318
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Small nuclear ribonucleoprotein-associated proteins B and B'B,
IA [auth p],
M [auth b],
X [auth P]
95Homo sapiensMutation(s): 0 
Gene Names: SNRPBCODSNRPB1
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Find proteins for P14678 (Homo sapiens)
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PHAROS:  P14678
GTEx:  ENSG00000125835 
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UniProt GroupP14678
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Small nuclear ribonucleoprotein Sm D1C,
JA [auth q],
N [auth c],
Y [auth Q]
91Homo sapiensMutation(s): 0 
Gene Names: SNRPD1
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PHAROS:  P62314
GTEx:  ENSG00000167088 
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UniProt GroupP62314
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Small nuclear ribonucleoprotein Sm D2D,
KA [auth r],
O [auth d],
Z [auth R]
118Homo sapiensMutation(s): 0 
Gene Names: SNRPD2
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PHAROS:  P62316
GTEx:  ENSG00000125743 
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UniProt GroupP62316
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Small nuclear ribonucleoprotein EAA [auth S],
E,
LA [auth s],
P [auth e]
92Homo sapiensMutation(s): 0 
Gene Names: SNRPE
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PHAROS:  P62304
GTEx:  ENSG00000182004 
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UniProt GroupP62304
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
Small nuclear ribonucleoprotein FBA [auth T],
F,
MA [auth t],
Q [auth f]
75Homo sapiensMutation(s): 0 
Gene Names: SNRPFPBSCF
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PHAROS:  P62306
GTEx:  ENSG00000139343 
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UniProt GroupP62306
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
Small nuclear ribonucleoprotein GCA [auth U],
G,
NA [auth u],
R [auth g]
76Homo sapiensMutation(s): 0 
Gene Names: SNRPGPBSCG
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Find proteins for P62308 (Homo sapiens)
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GTEx:  ENSG00000143977 
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UniProt GroupP62308
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
U1 small nuclear ribonucleoprotein 70 kDaDA [auth N],
H [auth K],
OA [auth n],
S [auth k]
60Homo sapiensMutation(s): 0 
Gene Names: SNRNP70RNPU1ZRPU1SNRP70U1AP1
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Find proteins for P08621 (Homo sapiens)
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PHAROS:  P08621
GTEx:  ENSG00000104852 
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UniProt GroupP08621
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
U1 small nuclear ribonucleoprotein CEA [auth M],
I [auth L],
PA [auth m],
T [auth l]
61Homo sapiensMutation(s): 0 
Gene Names: SNRPC
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Find proteins for P09234 (Homo sapiens)
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PHAROS:  P09234
GTEx:  ENSG00000124562 
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UniProt GroupP09234
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Entity ID: 10
MoleculeChains LengthOrganismImage
U1 RNA variant (48-MER) with 4-helix junction replaced by kissing loop (HIV-1 (Mal) DIS) and shorter stem-loop 4.FA [auth 3],
J [auth 1],
QA [auth 4],
U [auth 2]
60Homo sapiens
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Entity ID: 11
MoleculeChains LengthOrganismImage
RNA (5'-R(*AP*GP*GP*UP*AP*AP*GP*UP*CP*C)-3')GA [auth Y],
K [auth X],
RA [auth y],
V [auth x]
10Homo sapiens
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Small Molecules
Ligands 7 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
EPE
Query on EPE

Download Ideal Coordinates CCD File 
HB [auth 2],
TA [auth 1]
4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
C8 H18 N2 O4 S
JKMHFZQWWAIEOD-UHFFFAOYSA-N
SO4
Query on SO4

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AC [auth y]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
ZN
Query on ZN

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FB [auth l],
NB [auth M],
SA [auth L],
UB [auth m]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
EOH
Query on EOH

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VB [auth 4]ETHANOL
C2 H6 O
LFQSCWFLJHTTHZ-UHFFFAOYSA-N
K
Query on K

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CB [auth 1]
DB [auth b]
EB [auth b]
MB [auth Q]
SB [auth 3]
CB [auth 1],
DB [auth b],
EB [auth b],
MB [auth Q],
SB [auth 3],
TB [auth 3]
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
CL
Query on CL

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XB [auth 4]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
MG
Query on MG

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AB [auth 1]
BB [auth 1]
GB [auth l]
IB [auth 2]
JB [auth 2]
AB [auth 1],
BB [auth 1],
GB [auth l],
IB [auth 2],
JB [auth 2],
KB [auth 2],
LB [auth 2],
OB [auth 3],
PB [auth 3],
QB [auth 3],
RB [auth 3],
UA [auth 1],
VA [auth 1],
WA [auth 1],
WB [auth 4],
XA [auth 1],
YA [auth 1],
YB [auth y],
ZA [auth 1],
ZB [auth y]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.209 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 120.359α = 90
b = 172.627β = 90
c = 256.322γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
Aimlessdata scaling
PHASERphasing
Cootmodel building
REFMACrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-12-31
    Type: Initial release
  • Version 1.1: 2015-01-14
    Changes: Database references
  • Version 1.2: 2023-12-20
    Changes: Data collection, Database references, Derived calculations, Refinement description