4H1G

Structure of Candida albicans Kar3 motor domain fused to maltose-binding protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.169 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the Candida albicans Kar3 kinesin motor domain fused to maltose-binding protein.

Delorme, C.Joshi, M.Allingham, J.S.

(2012) Biochem.Biophys.Res.Commun. 428: 427-432

  • DOI: 10.1016/j.bbrc.2012.10.101

  • PubMed Abstract: 
  • In the human fungal pathogen Candida albicans, the Kinesin-14 motor protein Kar3 (CaKar3) is critical for normal mitotic division, nuclear fusion during mating, and morphogenic transition from the commensal yeast form to the virulent hyphal form. As ...

    In the human fungal pathogen Candida albicans, the Kinesin-14 motor protein Kar3 (CaKar3) is critical for normal mitotic division, nuclear fusion during mating, and morphogenic transition from the commensal yeast form to the virulent hyphal form. As a first step towards detailed characterization of this motor of potential medical significance, we have crystallized and determined the X-ray structure of the motor domain of CaKar3 as a maltose-binding protein (MBP) fusion. The structure shows strong conservation of overall motor domain topology to other Kar3 kinesins, but with some prominent differences in one of the motifs that compose the nucleotide-binding pocket and the surface charge distribution. The MBP and Kar3 modules are arranged such that MBP interacts with the Kar3 motor domain core at the same site where the neck linker of conventional kinesins docks during the "ATP state" of the mechanochemical cycle. This site differs from the Kar3 neck-core interface in the recent structure of the ScKar3Vik1 heterodimer. The position of MBP is also completely distinct from the Vik1 subunit in this complex. This may suggest that the site of MBP interaction on the CaKar3 motor domain provides an interface for the neck, or perhaps a partner subunit, at an intermediate state of its motile cycle that has not yet been observed for Kinesin-14 motors.


    Organizational Affiliation

    Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada K7L 3N6.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Maltose binding protein-CaKar3 motor domain fusion protein
A
715Escherichia coli (strain K12)Candida albicans (strain WO-1)
This entity is chimeric
Gene Names: malE,
Find proteins for P0AEX9 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AEX9
Find proteins for C4YKK8 (Candida albicans (strain WO-1))
Go to UniProtKB:  C4YKK8
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

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Download CCD File 
A
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
MTT
Query on MTT

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Download CCD File 
A
MALTOTETRAOSE
C24 H42 O21
LUEWUZLMQUOBSB-ZLBHSGTGSA-N
 Ligand Interaction
EDO
Query on EDO

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Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.169 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 49.463α = 90.00
b = 74.927β = 96.44
c = 98.673γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PHENIXrefinement
PDB_EXTRACTdata extraction
Locallydata collection
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-10-10
    Type: Initial release
  • Version 1.1: 2013-05-08
    Type: Database references
  • Version 1.2: 2017-08-02
    Type: Refinement description, Source and taxonomy