5YCA

Crystal structure of inner membrane protein Bqt4 in complex with LEM2

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.57 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 

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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:  
    5YC2, 5YCA, 6A6W

  • 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 direct interaction with the telomeric protein Rap1 ...

    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: 

    School of Life Science and Technology, Shanghai Tech University, 100 Haike Road, Shanghai 201210, P.R. China.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ubiquitin-like protein SMT3,Bouquet formation protein 4A207Saccharomyces cerevisiae S288C, Schizosaccharomyces pombe 972h-
This entity is chimeric		Mutation(s): 1 
Gene Names: SMT3, YDR510W, D9719.15, bqt4, SPBC19C7.10
UniProt
Find proteins for Q12306 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q12306 
Go to UniProtKB:  Q12306
Find proteins for O60158 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Explore O60158 
Go to UniProtKB:  O60158
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Lap-Emerin-Man domain protein 2B [auth C]20Schizosaccharomyces pombe 972h-Mutation(s): 0 
Gene Names: lem2, heh1, SPAC18G6.10
UniProt
Find proteins for Q10109 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Explore Q10109 
Go to UniProtKB:  Q10109
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.57 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 43.868α = 90
b = 53.128β = 90
c = 109.566γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
Cootmodel building
PHASERphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

  • Deposited Date: 2017-09-07 
  • Released Date: 2018-11-14 
    • Deposition Author(s): Chen, Y., Hu, C.

Revision History  (Full details and data files)

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