1NIN

PLASTOCYANIN FROM ANABAENA VARIABILIS, NMR, 20 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structure of reduced plastocyanin from the blue-green alga Anabaena variabilis.

Badsberg, U.Jorgensen, A.M.Gesmar, H.Led, J.J.Hammerstad, J.M.Jespersen, L.L.Ulstrup, J.

(1996) Biochemistry 35: 7021-7031

  • DOI: 10.1021/bi960621y

  • PubMed Abstract: 
  • The three-dimensional solution structure of plastocyanin from Anabaena variabilis (A.v.PCu) has been determined by nuclear magnetic resonance spectroscopy. Sixty structures were calculated by distance geometry from 1141 distance restraints and 46 dih ...

    The three-dimensional solution structure of plastocyanin from Anabaena variabilis (A.v.PCu) has been determined by nuclear magnetic resonance spectroscopy. Sixty structures were calculated by distance geometry from 1141 distance restraints and 46 dihedral angle restraints. The distance geometry structures were optimized by simulated annealing and restrained energy minimization. The average rms deviation from the mean structure for the 20 structures with the lowest total energy is 1.25 A for the backbone atoms and 1.75 A for all heavy atoms. Overall, the global tertiary fold of A.v.PCu resembles those of other plastocyanins which have been structurally characterized by X-ray diffraction and NMR methods. This holds even though A.v.PCu is longer than any other known plastocyanins, contains far less invariant amino acid residues, and has an overall charge that differs considerably from those of other plastocyanins (+1 vs -9 +/- 1 at pH > or = 7). The most striking feature of the A.v. PCu structure is the absence of the beta-turn, formed at the remote site by residues (58)-(61) in most higher plant plastocyanins. The displacement caused by the absence of this turn is compensated for by an extension of the small helix [from Ala53(51) to Ser60(58) in A.v.PCu] found in other plastocyanins. Moreover, the extra residues of A.v.PCu from Pro77 to Asp79 form an appended loop. These two features allow A.v.PCu to retain almost the same global fold as observed in other plastocyanins. From a comparison with the structures of other plastocyanins it is concluded that the lack of negatively charged residues at the remote site, rather than the specific structure of A.v.PCu, is the main reason for the failure of the remote site of this plastocyanin to function as a significant electron transfer site.


    Organizational Affiliation

    Department of Chemistry, University of Copenhagen, H. C. Orsted Institute, Denmark.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PLASTOCYANIN
A
105Anabaena variabilisGene Names: petE
Find proteins for P0C178 (Anabaena variabilis)
Go to UniProtKB:  P0C178
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CU
Query on CU

Download SDF File 
Download CCD File 
A
COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 
  • Olderado: 1NIN Olderado
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORphasing
X-PLORrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-10-14
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance