4K92

A Cryptic TOG Domain with a Distinct Architecture Underlies CLASP-Dependent Bipolar Spindle Formation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.005 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.183 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A cryptic TOG domain with a distinct architecture underlies CLASP-dependent bipolar spindle formation.

Leano, J.B.Rogers, S.L.Slep, K.C.

(2013) Structure 21: 939-950

  • DOI: 10.1016/j.str.2013.04.018

  • PubMed Abstract: 
  • CLASP is a key regulator of microtubule (MT) dynamics and bipolar mitotic spindle structure with CLASP mutants displaying a distinctive monopolar spindle phenotype. It has been postulated that cryptic TOG domains underlie CLASP’s ability to regulate ...

    CLASP is a key regulator of microtubule (MT) dynamics and bipolar mitotic spindle structure with CLASP mutants displaying a distinctive monopolar spindle phenotype. It has been postulated that cryptic TOG domains underlie CLASP’s ability to regulate MT dynamics. Here, we report the crystal structure of a cryptic TOG domain (TOG2) from human CLASP1, demonstrating the presence of a TOG array in the CLASP family. Strikingly, CLASP1 TOG2 exhibits a convex architecture across the tubulin-binding surface that contrasts with the flat tubulin-binding surface of XMAP215 family TOG domains. Mutations in key conserved TOG2 determinants abrogate the ability of CLASP mutants to rescue bipolar spindle formation in Drosophila cells depleted of endogenous CLASP. These findings highlight the common mechanistic use of TOG domains in XMAP215 and CLASP families to regulate MT dynamics and suggest that differential TOG domain architecture may confer distinct functions to these critical cytoskeletal regulators.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, NC 27599, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CLIP-associating protein 1
A, B
273Homo sapiensMutation(s): 0 
Gene Names: CLASP1 (KIAA0622, MAST1)
Find proteins for Q7Z460 (Homo sapiens)
Go to Gene View: CLASP1
Go to UniProtKB:  Q7Z460
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.005 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.183 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 62.284α = 90.00
b = 66.492β = 90.00
c = 138.934γ = 90.00
Software Package:
Software NamePurpose
PHENIXmodel building
PHENIXphasing
HKL-2000data reduction
SERGUIdata collection
HKL-2000data scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-06-12
    Type: Initial release
  • Version 1.1: 2013-09-04
    Type: Database references