Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 131.17 kDa 
• Atom Count: 7978 
• Modelled Residue Count: 963 
• Deposited Residue Count: 1128 
• Unique protein chains: 2

3ZV0

Structure of the SHQ1P-CBF5P complex

• DOI: 10.2210/pdb3ZV0/pdb

• Classification: CELL CYCLE
• Organism(s): Saccharomyces cerevisiae S288C
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2011-07-22 Released: 2011-11-30 
• Deposition Author(s): Walbott, H., Machado-Pinilla, R., Liger, D., Blaud, M., Rety, S., Grozdanov, P.N., Godin, K., vanTilbeurgh, H., Varani, G., Meier, U.T., Leulliot, N.

---

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 

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

• PubMed: 22085966 
• 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. 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

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN SHQ1	A, B	369	Saccharomyces cerevisiae S288C	Mutation(s): 0  Gene Names: SHQ1, YIL104C
Find proteins for P40486 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore P40486  Go to UniProtKB:  P40486

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
H/ACA RIBONUCLEOPROTEIN COMPLEX SUBUNIT 4	C, D	195	Saccharomyces cerevisiae S288C	Mutation(s): 0  Gene Names: CBF5, YLR175W, L9470.11 EC: 5.4.99
Find proteins for P33322 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore P33322  Go to UniProtKB:  P33322

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GOL	A, B, C, D	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

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 = 154.06	α = 90
b = 154.06	β = 90
c = 121.59	γ = 90

Software Package:

Software Name	Purpose
BUSTER	refinement
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2011-07-22 
• Released Date: 2011-11-30 
Deposition Author(s): Walbott, H., Machado-Pinilla, R., Liger, D., Blaud, M., Rety, S., Grozdanov, P.N., Godin, K., vanTilbeurgh, H., Varani, G., Meier, U.T., Leulliot, N.

Revision History  

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