3UAI

Structure of the Shq1-Cbf5-Nop10-Gar1 complex from Saccharomyces cerevisiae


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.06 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.222 

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Literature

Structure of the Shq1-Cbf5-Nop10-Gar1 complex and implications for H/ACA RNP biogenesis and dyskeratosis congenita

Li, S.Duan, J.Li, D.Ma, S.Ye, K.

(2011) EMBO J 30: 5010-5020

  • DOI: 10.1038/emboj.2011.427
  • Primary Citation of Related Structures:  
    3UAH, 3UAI

  • PubMed Abstract: 
  • Shq1 is a conserved protein required for the biogenesis of eukaryotic H/ACA ribonucleoproteins (RNPs), including human telomerase. We report the structure of the Shq1-specific domain alone and in complex with H/ACA RNP proteins Cbf5, Nop10 and Gar1. The Shq1-specific domain adopts a novel helical fold and primarily contacts the PUA domain and the otherwise disordered C-terminal extension (CTE) of Cbf5 ...

    Shq1 is a conserved protein required for the biogenesis of eukaryotic H/ACA ribonucleoproteins (RNPs), including human telomerase. We report the structure of the Shq1-specific domain alone and in complex with H/ACA RNP proteins Cbf5, Nop10 and Gar1. The Shq1-specific domain adopts a novel helical fold and primarily contacts the PUA domain and the otherwise disordered C-terminal extension (CTE) of Cbf5. The structure shows that dyskeratosis congenita mutations found in the CTE of human Cbf5 likely interfere with Shq1 binding. However, most mutations in the PUA domain are not located at the Shq1-binding surface and also have little effect on the yeast Cbf5-Shq1 interaction. Shq1 binds Cbf5 independently of the H/ACA RNP proteins Nop10, Gar1 and Nhp2 and the assembly factor Naf1, but shares an overlapping binding surface with H/ACA RNA. Shq1 point mutations that disrupt Cbf5 interaction suppress yeast growth particularly at elevated temperatures. Our results suggest that Shq1 functions as an assembly chaperone that protects the Cbf5 protein complexes from non-specific RNA binding and aggregation before assembly of H/ACA RNA.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, College of Life Sciences, Beijing Normal University, Beijing, China.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
H/ACA ribonucleoprotein complex subunit 4A400Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: CBF5YLR175WL9470.11
EC: 5.4.99
UniProt
Find proteins for P33322 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  P33322
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UniProt GroupP33322
Protein Feature View
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
H/ACA ribonucleoprotein complex subunit 3B58Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: NOP10YHR072W-A
UniProt
Find proteins for Q6Q547 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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UniProt GroupQ6Q547
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
H/ACA ribonucleoprotein complex subunit 1C114Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: GAR1YHR089C
UniProt
Find proteins for P28007 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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UniProt GroupP28007
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Protein SHQ1D366Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: SHQ1YIL104C
UniProt
Find proteins for P40486 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  P40486
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UniProt GroupP40486
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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.06 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.222 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 100.995α = 90
b = 100.995β = 90
c = 272.329γ = 90
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

  • Released Date: 2011-12-14 
  • Deposition Author(s): Ye, K.

Revision History  (Full details and data files)

  • Version 1.0: 2011-12-14
    Type: Initial release
  • Version 1.1: 2013-06-26
    Changes: Database references