2BQQ

X-ray Structure of the N-terminal Domain of Human Doublecortin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.173 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The Dc-Module of Doublecortin: Dynamics, Domain Boundaries, and Functional Implications.

Cierpicki, T.Kim, M.H.Cooper, D.R.Derewenda, U.Bushweller, J.H.Derewenda, Z.S.

(2006) Proteins 64: 874

  • DOI: 10.1002/prot.21068

  • PubMed Abstract: 
  • The doublecortin-like (DC) domains, which usually occur in tandem, constitute novel microtubule-binding modules. They were first identified in doublecortin (DCX), a protein expressed in migrating neurons, and in the doublecortin-like kinase (DCLK). T ...

    The doublecortin-like (DC) domains, which usually occur in tandem, constitute novel microtubule-binding modules. They were first identified in doublecortin (DCX), a protein expressed in migrating neurons, and in the doublecortin-like kinase (DCLK). They are also found in other proteins, including the RP1 gene product which-when mutated-causes a form of inherited blindness. We previously reported an X-ray structure of the N-terminal DC domain of DCLK (N-DCLK), and a solution structure of an analogous module of human doublecortin (N-DCX). These studies showed that the DC domain has a tertiary fold closely reminiscent of ubiquitin and similar to several GTPase-binding domains. We now report an X-ray structure of a mutant of N-DCX, in which the C-terminal fragment (residues 139-147) unexpectedly shows an altered, "open" conformation. However, heteronuclear NMR data show that this C-terminal fragment is only transiently open in solution, and assumes a predominantly "closed" conformation. While the "open" conformation may be artificially stabilized by crystal packing interactions, the observed switching between the "open" and "closed" conformations, which shortens the linker between the two DC-domains by approximately 20 A, is likely to be of functional importance in the control of tubulin polymerization and microtubule bundling by doublecortin.


    Organizational Affiliation

    Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville 22908-0736, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NEURONAL MIGRATION PROTEIN DOUBLECORTIN
A
113Homo sapiensMutation(s): 2 
Gene Names: DCX (DBCN, LISX)
Find proteins for O43602 (Homo sapiens)
Go to Gene View: DCX
Go to UniProtKB:  O43602
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.173 
  • Space Group: I 4 2 2
Unit Cell:
Length (Å)Angle (°)
a = 61.655α = 90.00
b = 61.655β = 90.00
c = 116.020γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data reduction
AMoREphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-07-19
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance
  • Version 1.2: 2013-10-02
    Type: Data collection, Database references, Derived calculations, Structure summary
  • Version 1.3: 2015-04-01
    Type: Structure summary