4B86

Crystal structure of the MSL1-MSL2 complex (3.5A)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.256 
  • R-Value Observed: 0.258 

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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: 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 ...

    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)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
MALE-SPECIFIC LETHAL 1 HOMOLOG ABEFIJ59Homo sapiensMutation(s): 0 
Gene Names: MSL1MSL1L1
Find proteins for Q68DK7 (Homo sapiens)
Explore Q68DK7 
Go to UniProtKB:  Q68DK7
NIH Common Fund Data Resources
PHAROS:  Q68DK7
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
MALE-SPECIFIC LETHAL 2 HOMOLOG CDGHKL116Homo sapiensMutation(s): 0 
Gene Names: MSL2KIAA1585MSL2L1RNF184
EC: 2.3.2
Find proteins for Q9HCI7 (Homo sapiens)
Explore Q9HCI7 
Go to UniProtKB:  Q9HCI7
NIH Common Fund Data Resources
PHAROS:  Q9HCI7
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.256 
  • R-Value Observed: 0.258 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 104.65α = 90
b = 182.21β = 90
c = 89.47γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
SHELXDphasing
SHARPphasing
REFMACrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-02-06
    Type: Initial release