2PCY

THE CRYSTAL STRUCTURE OF POPLAR APOPLASTOCYANIN AT 1.8-ANGSTROMS RESOLUTION. THE GEOMETRY OF THE COPPER-BINDING SITE IS CREATED BY THE POLYPEPTIDE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Work: 0.160 

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This is version 1.3 of the entry. See complete history

Literature

The crystal structure of poplar apoplastocyanin at 1.8-A resolution. The geometry of the copper-binding site is created by the polypeptide

Garrett, T.P.Clingeleffer, D.J.Guss, J.M.Rogers, S.J.Freeman, H.C.

(1984) J.Biol.Chem. 259: 2822-2825


  • PubMed Abstract: 
  • The three-dimensional structure of apoplastocyanin from poplar leaves (Populus nigra var. italica) has been determined by x-ray diffraction at 1.8-A resolution. The structure closely resembles that of the holoprotein. In particular, the positions of ...

    The three-dimensional structure of apoplastocyanin from poplar leaves (Populus nigra var. italica) has been determined by x-ray diffraction at 1.8-A resolution. The structure closely resembles that of the holoprotein. In particular, the positions of the copper-binding residues in the apo- and holoproteins differ by only 0.1-0.3 A. This indicates that the irregular geometry of the "type 1" copper site is imposed upon the metal atom by the polypeptide moiety. A 180 degrees rotation of one solvent-exposed histidine imidazole ring about C beta-C gamma appears to facilitate access to the copper site. The close structural similarity between apo-, Cu-(II)-, and Cu(I)-plastocyanin was initially demonstrated by means of electron density difference maps. Two series of restrained least squares refinement calculations for apoplastocyanin, originating from different sets of atomic positional parameters, were carried out in parallel. Both refinements converged to the same model which, when fully refined, had a residual R = 0.16. Forty-two water molecules were located during the refinement.


    Related Citations: 
    • X-Ray Crystal Structure Analysis of Plastocyanin at 2.7 Angstroms Resolution
      Colman, P.M.,Freeman, H.C.,Guss, J.M.,Murata, M.,Norris, V.A.,Ramshaw, J.A.M.,Venkatappa, M.P.
      (1978) Nature 272: 319
    • Structure of Oxidized Poplar Plastocyanin at 1.6 Angstroms Resolution
      Guss, J.M.,Freeman, H.C.
      (1983) J.Mol.Biol. 169: 521



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PLASTOCYANIN
A
99Populus nigraMutation(s): 0 
Gene Names: PETE
Find proteins for P00299 (Populus nigra)
Go to UniProtKB:  P00299
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Work: 0.160 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 29.530α = 90.00
b = 46.800β = 90.00
c = 57.950γ = 90.00
Software Package:
Software NamePurpose
RESTRAINEDrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1984-02-02
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations, Other