3ZV0

Structure of the SHQ1P-CBF5P complex

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.180 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

The H/Aca Rnp Assembly Factor Shq1 Functions as an RNA Mimic.

Walbott, H., Machado-Pinilla, R., Liger, D., Blaud, M., Rety, S., Grozdanov, P.N., Godin, K., Van Tilbeurgh, H., Varani, G., Meier, U.T., Leulliot, N.

(2011) Genes Dev 25: 2398

  • DOI: 10.1101/gad.176834.111
  • Primary Citation of Related Structures:  
    3ZUZ, 3ZV0

  • PubMed Abstract: 

    • SHQ1 is an essential assembly factor for H/ACA ribonucleoproteins (RNPs) required for ribosome biogenesis, pre-mRNA splicing, and telomere maintenance. SHQ1 binds dyskerin/NAP57, the catalytic subunit of human H/ACA RNPs, and this interaction is modulated by mutations causing X-linked dyskeratosis congenita ...

    SHQ1 is an essential assembly factor for H/ACA ribonucleoproteins (RNPs) required for ribosome biogenesis, pre-mRNA splicing, and telomere maintenance. SHQ1 binds dyskerin/NAP57, the catalytic subunit of human H/ACA RNPs, and this interaction is modulated by mutations causing X-linked dyskeratosis congenita. We report the crystal structure of the C-terminal domain of yeast SHQ1, Shq1p, and its complex with yeast dyskerin/NAP57, Cbf5p, lacking its catalytic domain. The C-terminal domain of Shq1p interacts with the RNA-binding domain of Cbf5p and, through structural mimicry, uses the RNA-protein-binding sites to achieve a specific protein-protein interface. We propose that Shq1p operates as a Cbf5p chaperone during RNP assembly by acting as an RNA placeholder, thereby preventing Cbf5p from nonspecific RNA binding before association with an H/ACA RNA and the other core RNP proteins.

    Organizational Affiliation: 

    Institut de Biochimie et de Biophysique Moléculaire et Cellulaire, Université de Paris-Sud, Orsay Cedex, France.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN SHQ1A, B369Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: SHQ1, YIL104C
UniProt
Find proteins for P40486 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P40486 
Go to UniProtKB:  P40486
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP40486
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
H/ACA RIBONUCLEOPROTEIN COMPLEX SUBUNIT 4C, D195Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: CBF5, YLR175W, L9470.11
EC: 5.4.99
UniProt
Find proteins for P33322 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P33322 
Go to UniProtKB:  P33322
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP33322
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.180 
  • Space Group: P 4 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 154.06α = 90
b = 154.06β = 90
c = 121.59γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-11-30
    Type: Initial release
  • Version 1.1: 2019-02-27
    Changes: Data collection, Experimental preparation, Other