4B7Y

Crystal structure of the MSL1-MSL2 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.25 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.245 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Msl1-Mediated Dimerization of the Dosage Compensation Complex is Essential for Male X-Chromosome Regulation in Drosophila.

Hallacli, E.Lipp, M.Georgiev, P.Spielman, C.Cusack, S.Akhtar, A.Kadlec, J.

(2012) Mol Cell 48: 587

  • DOI: https://doi.org/10.1016/j.molcel.2012.09.014
  • Primary Citation of Related Structures:  
    4B7Y, 4B86

  • PubMed Abstract: 

    The Male-Specific Lethal (MSL) complex regulates dosage compensation of the male X chromosome in Drosophila. Here, we report the crystal structure of its MSL1/MSL2 core, where two MSL2 subunits bind to a dimer formed by two molecules of MSL1. Analysis of structure-based mutants revealed that MSL2 can only interact with the MSL1 dimer, but MSL1 dimerization is MSL2 independent. We show that Msl1 is a substrate for Msl2 E3 ubiquitin ligase activity. ChIP experiments revealed that Msl1 dimerization is essential for targeting and spreading of the MSL complex on X-linked genes; however, Msl1 binding to promoters of male and female cells is independent of the dimer status and other MSL proteins. Finally, we show that loss of Msl1 dimerization leads to male-specific lethality. We propose that Msl1-mediated dimerization of the entire MSL complex is required for Msl2 binding, X chromosome recognition, and spreading along the X chromosome.


  • Organizational Affiliation

    Max-Planck-Institut für Immunbiologie und Epigenetik, Stübeweg 51, 79108 Freiburg im Breisgau, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
MALE-SPECIFIC LETHAL 1 HOMOLOG
A, B
44Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q68DK7 (Homo sapiens)
Explore Q68DK7 
Go to UniProtKB:  Q68DK7
PHAROS:  Q68DK7
GTEx:  ENSG00000188895 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ68DK7
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
MALE-SPECIFIC LETHAL 2 HOMOLOG
C, D
116Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9HCI7 (Homo sapiens)
Explore Q9HCI7 
Go to UniProtKB:  Q9HCI7
PHAROS:  Q9HCI7
GTEx:  ENSG00000174579 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9HCI7
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.25 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.245 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 100.99α = 90
b = 100.99β = 90
c = 88.65γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-02-06
    Type: Initial release
  • Version 1.1: 2023-12-20
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description