5H1K

Crystal structure of WD40 repeat domains of Gemin5 in complex with 13-nt U4 snRNA fragment


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.172 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

Structural basis for snRNA recognition by the double-WD40 repeat domain of Gemin5

Jin, W.Wang, Y.Liu, C.P.Yang, N.Jin, M.Cong, Y.Wang, M.Xu, R.M.

(2016) Genes Dev 30: 2391-2403

  • DOI: https://doi.org/10.1101/gad.291377.116
  • Primary Citation of Related Structures:  
    5H1J, 5H1K, 5H1L, 5H1M

  • PubMed Abstract: 

    Assembly of the spliceosomal small nuclear ribonucleoparticle (snRNP) core requires the participation of the multisubunit SMN (survival of motor neuron) complex, which contains SMN and several Gemin proteins. The SMN and Gemin2 subunits directly bind Sm proteins, and Gemin5 is required for snRNP biogenesis and has been implicated in snRNA recognition. The RNA sequence required for snRNP assembly includes the Sm site and an adjacent 3' stem-loop, but a precise understanding of Gemin5's RNA-binding specificity is lacking. Here we show that the N-terminal half of Gemin5, which is composed of two juxtaposed seven-bladed WD40 repeat domains, recognizes the Sm site. The tandem WD40 repeat domains are rigidly held together to form a contiguous RNA-binding surface. RNA-contacting residues are located mostly on loops between β strands on the apical surface of the WD40 domains. Structural and biochemical analyses show that base-stacking interactions involving four aromatic residues and hydrogen bonding by a pair of arginines are crucial for specific recognition of the Sm sequence. We also show that an adenine immediately 5' to the Sm site is required for efficient binding and that Gemin5 can bind short RNA oligos in an alternative mode. Our results provide mechanistic understandings of Gemin5's snRNA-binding specificity as well as valuable insights into the molecular mechanism of RNA binding by WD40 repeat proteins in general.


  • Organizational Affiliation

    National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China.


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Gem-associated protein 5
A, B
734Homo sapiensMutation(s): 0 
Gene Names: GEMIN5
UniProt & NIH Common Fund Data Resources
Find proteins for Q8TEQ6 (Homo sapiens)
Explore Q8TEQ6 
Go to UniProtKB:  Q8TEQ6
PHAROS:  Q8TEQ6
GTEx:  ENSG00000082516 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8TEQ6
Sequence Annotations
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  • Reference Sequence

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains LengthOrganismImage
U4 snRNA (5'-R(*GP*CP*AP*AP*UP*UP*UP*UP*UP*GP*AP*CP*A)-3')
C, D
13Homo sapiens
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.172 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 98.654α = 90
b = 107.191β = 90
c = 151.48γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of ChinaChina31570747
National Natural Science Foundation of ChinaChina31622020
National Natural Science Foundation of ChinaChina31430018
National Natural Science Foundation of ChinaChina31521002
Beijing Natural Science FoundationChina5164038
Strategic Priority Research Program of Chinese Academy of SciencesChinaXDB08010100

Revision History  (Full details and data files)

  • Version 1.0: 2016-11-23
    Type: Initial release
  • Version 1.1: 2016-12-07
    Changes: Database references
  • Version 1.2: 2017-10-18
    Changes: Author supporting evidence, Database references
  • Version 1.3: 2023-11-08
    Changes: Data collection, Database references, Refinement description