5YC2

Crystal structure of inner membrane protein Bqt4 in complex with telomeric protein Rap1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.704 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.202 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural insights into chromosome attachment to the nuclear envelope by an inner nuclear membrane protein Bqt4 in fission yeast.

Hu, C.Inoue, H.Sun, W.Takeshita, Y.Huang, Y.Xu, Y.Kanoh, J.Chen, Y.

(2019) Nucleic Acids Res. 47: 1573-1584

  • DOI: 10.1093/nar/gky1186
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The dynamic association of chromosomes with the nuclear envelope (NE) is essential for chromosome maintenance. Schizosaccharomyces pombe inner nuclear membrane protein Bqt4 plays a critical role in connecting telomeres to the NE, mainly through a dir ...

    The dynamic association of chromosomes with the nuclear envelope (NE) is essential for chromosome maintenance. Schizosaccharomyces pombe inner nuclear membrane protein Bqt4 plays a critical role in connecting telomeres to the NE, mainly through a direct interaction with the telomeric protein Rap1. Bqt4 also interacts with Lem2 for pericentric heterochromatin maintenance. How Bqt4 coordinates the interactions with different proteins to exert their functions is unclear. Here, we report the crystal structures of the N-terminal domain of Bqt4 in complexes with Bqt4-binding motifs from Rap1, Lem2, and Sad1. The structural, biochemical and cellular analyses reveal that the N-terminal domain of Bqt4 is a protein-interaction module that recognizes a consensus motif and plays essential roles in telomere-NE association and meiosis progression. Phosphorylation of Bqt4-interacting proteins may act as a switch to regulate these interactions during cell cycles. Our studies provide structural insights into the identification and regulation of Bqt4-mediated interactions.


    Organizational Affiliation

    Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka 565-0871, Japan.,School of Life Science and Technology, Shanghai Tech University, 100 Haike Road, Shanghai 201210, P.R. China.,State Key Laboratory of Molecular Biology, National Center for Protein Science Shanghai, Shanghai Science Research Center, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences; University of Chinese Academy of Sciences, 333 Haike Road, Shanghai 201210, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ubiquitin-like protein SMT3,Bouquet formation protein 4
A, C
207Schizosaccharomyces pombe (strain 972 / ATCC 24843)Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
This entity is chimeric
Mutation(s): 1 
Gene Names: bqt4, SMT3
Find proteins for O60158 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Go to UniProtKB:  O60158
Find proteins for Q12306 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q12306
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
DNA-binding protein rap1
B, D
18Schizosaccharomyces pombe (strain 972 / ATCC 24843)Mutation(s): 0 
Gene Names: rap1
Find proteins for Q96TL7 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Go to UniProtKB:  Q96TL7
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.704 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.202 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 32.154α = 94.92
b = 51.293β = 100.56
c = 79.669γ = 105.00
Software Package:
Software NamePurpose
HKL-2000data collection
Cootmodel building
PHENIXrefinement
PDB_EXTRACTdata extraction
PHASERphasing
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2017-09-06 
  • Released Date: 2018-11-14 
  • Deposition Author(s): Chen, Y., Hu, C.

Revision History 

  • Version 1.0: 2018-11-14
    Type: Initial release
  • Version 1.1: 2018-12-05
    Type: Data collection, Database references
  • Version 1.2: 2019-07-10
    Type: Data collection, Database references