4K6J

Human cohesin inhibitor WapL


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6205 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.184 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure of the human cohesin inhibitor Wapl.

Ouyang, Z.Zheng, G.Song, J.Borek, D.M.Otwinowski, Z.Brautigam, C.A.Tomchick, D.R.Rankin, S.Yu, H.

(2013) Proc.Natl.Acad.Sci.USA 110: 11355-11360

  • DOI: 10.1073/pnas.1304594110

  • PubMed Abstract: 
  • Cohesin, along with positive regulators, establishes sister-chromatid cohesion by forming a ring to circle chromatin. The wings apart-like protein (Wapl) is a key negative regulator of cohesin and forms a complex with precocious dissociation of siste ...

    Cohesin, along with positive regulators, establishes sister-chromatid cohesion by forming a ring to circle chromatin. The wings apart-like protein (Wapl) is a key negative regulator of cohesin and forms a complex with precocious dissociation of sisters protein 5 (Pds5) to promote cohesin release from chromatin. Here we report the crystal structure and functional characterization of human Wapl. Wapl contains a flexible, variable N-terminal region (Wapl-N) and a conserved C-terminal domain (Wapl-C) consisting of eight HEAT (Huntingtin, Elongation factor 3, A subunit, and target of rapamycin) repeats. Wapl-C folds into an elongated structure with two lobes. Structure-based mutagenesis maps the functional surface of Wapl-C to two distinct patches (I and II) on the N lobe and a localized patch (III) on the C lobe. Mutating critical patch I residues weaken Wapl binding to cohesin and diminish sister-chromatid resolution and cohesin release from mitotic chromosomes in human cells and Xenopus egg extracts. Surprisingly, patch III on the C lobe does not contribute to Wapl binding to cohesin or its known regulators. Although patch I mutations reduce Wapl binding to intact cohesin, they do not affect Wapl-Pds5 binding to the cohesin subcomplex of sister chromatid cohesion protein 1 (Scc1) and stromal antigen 2 (SA2) in vitro, which is instead mediated by Wapl-N. Thus, Wapl-N forms extensive interactions with Pds5 and Scc1-SA2. Wapl-C interacts with other cohesin subunits and possibly unknown effectors to trigger cohesin release from chromatin.


    Related Citations: 
    • Phosphorylation-enabled binding of SGO1-PP2A to cohesin protects sororin and centromeric cohesion during mitosis.
      Liu, H.,Rankin, S.,Yu, H.
      (2013) Nat.Cell Biol. 15: 40


    Organizational Affiliation

    Howard Hughes Medical Institute, Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Wings apart-like protein homolog
A, B
568Homo sapiensMutation(s): 0 
Gene Names: WAPL (FOE, KIAA0261, WAPAL)
Find proteins for Q7Z5K2 (Homo sapiens)
Go to Gene View: WAPL
Go to UniProtKB:  Q7Z5K2
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
ACT
Query on ACT

Download SDF File 
Download CCD File 
A
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6205 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.184 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 107.540α = 90.00
b = 107.540β = 90.00
c = 300.608γ = 90.00
Software Package:
Software NamePurpose
HKL-3000data reduction
MLPHAREphasing
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
HKL-3000data scaling
PHENIXrefinement
CrystalCleardata collection
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-06-19
    Type: Initial release
  • Version 1.1: 2013-07-03
    Type: Database references
  • Version 1.2: 2013-07-24
    Type: Database references
  • Version 1.3: 2017-10-25
    Type: Author supporting evidence, Refinement description