1RTP

REFINED X-RAY STRUCTURE OF RAT PARVALBUMIN, A MAMMALIAN ALPHA-LINEAGE PARVALBUMIN, AT 2.0 A RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Observed: 0.181 

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This is version 1.3 of the entry. See complete history


Literature

Refined crystal structure of rat parvalbumin, a mammalian alpha-lineage parvalbumin, at 2.0 A resolution.

McPhalen, C.A.Sielecki, A.R.Santarsiero, B.D.James, M.N.

(1994) J Mol Biol 235: 718-732

  • DOI: 10.1006/jmbi.1994.1023
  • Primary Citation of Related Structures:  
    1RTP

  • PubMed Abstract: 
  • We present here the X-ray crystal structure of the rat alpha-parvalbumin from fast twitch muscle. This protein (M(r) 11.8 kDa) crystallizes in space group P2(1)2(1)2(1) with unit cell dimensions of a = 34.3 A, b = 55.0 A, c = 156.1 A and three molecules in the asymmetric unit ...

    We present here the X-ray crystal structure of the rat alpha-parvalbumin from fast twitch muscle. This protein (M(r) 11.8 kDa) crystallizes in space group P2(1)2(1)2(1) with unit cell dimensions of a = 34.3 A, b = 55.0 A, c = 156.1 A and three molecules in the asymmetric unit. The protein structure was solved by the molecular replacement method and has been refined to a crystallographic R-factor [formula: see text] of 0.181 for all reflections with I/sigma(I) > or = 2 (I = intensity) between 8.0 and 2.0 A resolution. The molecules located most easily in the molecular replacement rotation function had lower overall thermal motion parameters and higher numbers of intermolecular crystal packing contacts. The overall fold of the polypeptide chain for the rat alpha-parvalbumin is similar to other known parvalbumin structures (root-mean-square deviations in alpha-carbon atom positions range from 0.60 to 0.87 A). There are two Ca(2+)-binding sites in parvalbumins, and there is some evidence for a third ion-binding site, adjacent to the CD site, in the rat species. The level of structural variability among the best-ordered regions of the three independent rat alpha-parvalbumin molecules in the crystallographic asymmetric unit is two to three times higher than the mean coordinate error (0.10 A), indicating flexibility in the molecule. Sequence differences between alpha and beta-lineage parvalbumins result in repacking of the hydrophobic core and some shifts in the protein backbone. The shifts are localized, however, and entire helices do not shift as rigid units.


    Organizational Affiliation

    Department of Biochemistry, University of Alberta, Edmonton, Canada.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ALPHA-PARVALBUMIN 123109Rattus rattusMutation(s): 0 
Find proteins for P02625 (Rattus norvegicus)
Explore P02625 
Go to UniProtKB:  P02625
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Observed: 0.181 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 34.3α = 90
b = 55β = 90
c = 156.1γ = 90
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1994-01-31
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Derived calculations, Other