1P5S

STRUCTURE AND FUNCTION OF THE CALPONIN-HOMOLOGY DOMAIN OF AN IQGAP PROTEIN FROM SCHIZOSACCHAROMYCES POMBE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.22 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.199 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure, crystal packing and molecular dynamics of the calponin-homology domain of Schizosaccharomyces pombe Rng2.

Wang, C.H.Balasubramanian, M.K.Dokland, T.

(2004) Acta Crystallogr D Biol Crystallogr 60: 1396-1403

  • DOI: 10.1107/S0907444904012983
  • Primary Citation of Related Structures:  
    1P2X, 1P5S

  • PubMed Abstract: 
  • Schizosaccharomyces pombe Rng2 is an IQGAP protein that is essential for the assembly of an actomyosin ring during cytokinesis. Rng2 contains an amino-terminal calponin-homology (CH) domain, 11 IQ repeats and a RasGAP-homology domain. CH domains are known mainly for their ability to bind F-actin, although they have other ligands in vivo and there are only few examples of actin-binding single CH domains ...

    Schizosaccharomyces pombe Rng2 is an IQGAP protein that is essential for the assembly of an actomyosin ring during cytokinesis. Rng2 contains an amino-terminal calponin-homology (CH) domain, 11 IQ repeats and a RasGAP-homology domain. CH domains are known mainly for their ability to bind F-actin, although they have other ligands in vivo and there are only few examples of actin-binding single CH domains. The structures of several CH domains have already been reported, but this is only the third report of an actin-binding protein that contains a single CH domain (the structures of calponin and EB1 have been reported previously). The 2.21 A resolution crystal structure of the amino-terminal 190 residues of Rng2 from Br- and Hg-derivatives includes 40 residues (150-190) carboxyl-terminal to the CH domain that resemble neither the extended conformation seen in utrophin, nor the compact conformation seen in fimbrin, although residues 154-160 form an unstructured coil which adopts a substructure similar to dystrophin residues 240-246 in the carboxyl-terminal portion of the CH2 domain. This region wraps around the stretch of residues that would be equivalent to the proposed actin-binding site ABS1 and ABS2 from dystrophin. This distinctive feature is absent from previously published CH-domain structures. Another feature revealed by comparing the two derivatives is the presence of two loop conformations between Tyr92 and Arg99.


    Organizational Affiliation

    Institute of Molecular and Cell Biology, 61 Biopolis Drive (Proteos), Singapore 138673, Singapore. chernhoe@imcb.a-star.edu.sg



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ras GTPase-activating-like protein rng2A203Schizosaccharomyces pombeMutation(s): 0 
Gene Names: RNG2 OR SPAC4F8.13C
UniProt
Find proteins for O14188 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Explore O14188 
Go to UniProtKB:  O14188
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HG
Query on HG

Download Ideal Coordinates CCD File 
B [auth A], C [auth A], D [auth A], E [auth A]MERCURY (II) ION
Hg
BQPIGGFYSBELGY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.22 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.199 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 30.884α = 90
b = 68.666β = 102.51
c = 35.309γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
SHARPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-05-11
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance