2H4Q

Crystal structure of a M-loop deletion variant of MENT in the cleaved conformation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.189 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

X-ray crystal structure of MENT: evidence for functional loop-sheet polymers in chromatin condensation.

McGowan, S.Buckle, A.M.Irving, J.A.Ong, P.C.Bashtannyk-Puhalovich, T.A.Kan, W.T.Henderson, K.N.Bulynko, Y.A.Popova, E.Y.Smith, A.I.Bottomley, S.P.Rossjohn, J.Grigoryev, S.A.Pike, R.N.Whisstock, J.C.

(2006) EMBO J 25: 3144-3155

  • DOI: 10.1038/sj.emboj.7601201
  • Primary Citation of Related Structures:  
    2DUT, 2H4P, 2H4Q, 2H4R

  • PubMed Abstract: 
  • Most serpins are associated with protease inhibition, and their ability to form loop-sheet polymers is linked to conformational disease and the human serpinopathies. Here we describe the structural and functional dissection of how a unique serpin, the non-histone architectural protein, MENT (Myeloid and Erythroid Nuclear Termination stage-specific protein), participates in DNA and chromatin condensation ...

    Most serpins are associated with protease inhibition, and their ability to form loop-sheet polymers is linked to conformational disease and the human serpinopathies. Here we describe the structural and functional dissection of how a unique serpin, the non-histone architectural protein, MENT (Myeloid and Erythroid Nuclear Termination stage-specific protein), participates in DNA and chromatin condensation. Our data suggest that MENT contains at least two distinct DNA-binding sites, consistent with its simultaneous binding to the two closely juxtaposed linker DNA segments on a nucleosome. Remarkably, our studies suggest that the reactive centre loop, a region of the MENT molecule essential for chromatin bridging in vivo and in vitro, is able to mediate formation of a loop-sheet oligomer. These data provide mechanistic insight into chromatin compaction by a non-histone architectural protein and suggest how the structural plasticity of serpins has adapted to mediate physiological, rather than pathogenic, loop-sheet linkages.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria, Australia.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Heterochromatin-associated protein MENTA382Gallus gallusMutation(s): 1 
Gene Names: ment-1SERPINB10MENT
UniProt
Find proteins for O73790 (Gallus gallus)
Explore O73790 
Go to UniProtKB:  O73790
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Heterochromatin-associated protein MENTB34Gallus gallusMutation(s): 0 
Gene Names: ment-1SERPINB10MENT
UniProt
Find proteins for O73790 (Gallus gallus)
Explore O73790 
Go to UniProtKB:  O73790
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.189 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 150.194α = 90
b = 150.194β = 90
c = 175.485γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
CrystalCleardata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-07-18
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-11-10
    Changes: Database references