6B5D

Structural Basis for Katanin Self-Assembly


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.211 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Structural basis for disassembly of katanin heterododecamers.

Nithianantham, S.McNally, F.J.Al-Bassam, J.

(2018) J Biol Chem 293: 10590-10605

  • DOI: 10.1074/jbc.RA117.001215
  • Primary Citation of Related Structures:  
    6B5D, 6B5C

  • PubMed Abstract: 
  • The reorganization of microtubules in mitosis, meiosis, and development requires the microtubule-severing activity of katanin. Katanin is a heterodimer composed of an A TPase a ssociated with diverse cellular a ctivities (AAA) subunit and a regulatory subunit ...

    The reorganization of microtubules in mitosis, meiosis, and development requires the microtubule-severing activity of katanin. Katanin is a heterodimer composed of an A TPase a ssociated with diverse cellular a ctivities (AAA) subunit and a regulatory subunit. Microtubule severing requires ATP hydrolysis by katanin's conserved AAA ATPase domains. Whereas other AAA ATPases form stable hexamers, we show that katanin forms only a monomer or dimers of heterodimers in solution. Katanin oligomers consistent with hexamers of heterodimers or heterododecamers were only observed for an ATP hydrolysis-deficient mutant in the presence of ATP. X-ray structures of katanin's AAA ATPase in monomeric nucleotide-free and pseudo-oligomeric ADP-bound states revealed conformational changes in the AAA subdomains that explained the structural basis for the instability of the katanin heterododecamer. We propose that the rapid dissociation of katanin AAA oligomers may lead to an autoinhibited state that prevents inappropriate microtubule severing or that cyclical disassembly into heterodimers may critically contribute to the microtubule-severing mechanism.


    Organizational Affiliation

    From the Department of Molecular Cellular Biology University of California, Davis, California 95616 jawdat@ucdavis.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Meiotic spindle formation protein mei-1A309Caenorhabditis elegansMutation(s): 0 
Gene Names: mei-1T01G9.5
EC: 3.6.4.3 (PDB Primary Data), 5.6.1.1 (UniProt)
UniProt
Find proteins for P34808 (Caenorhabditis elegans)
Explore P34808 
Go to UniProtKB:  P34808
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP (Subject of Investigation/LOI)
Query on ADP

Download Ideal Coordinates CCD File 
B [auth A]ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
AL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.211 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 98.83α = 90
b = 98.83β = 90
c = 75.08γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata scaling
PDB_EXTRACTdata extraction
iMOSFLMdata reduction
SCALAdata scaling
SHELXCDphasing
Cootmodel building

Structure Validation

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Ligand Structure Quality Assessment  



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM110283

Revision History  (Full details and data files)

  • Version 1.0: 2018-05-23
    Type: Initial release
  • Version 1.1: 2018-07-18
    Changes: Data collection, Database references, Source and taxonomy
  • Version 1.2: 2020-01-01
    Changes: Author supporting evidence