1PHN

STRUCTURE OF PHYCOCYANIN FROM CYANIDIUM CALDARIUM AT 1.65A RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.183 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of C-phycocyanin from Cyanidium caldarium provides a new perspective on phycobilisome assembly.

Stec, B.Troxler, R.F.Teeter, M.M.

(1999) Biophys J 76: 2912-2921

  • DOI: 10.1016/S0006-3495(99)77446-1
  • Primary Citation of Related Structures:  
    1PHN

  • PubMed Abstract: 
  • The crystal structure of the light-harvesting protein phycocyanin from the cyanobacterium Cyanidium caldarium with novel crystal packing has been solved at 1.65-A resolution. The structure has been refined to an R value of 18.3% with excellent backbo ...

    The crystal structure of the light-harvesting protein phycocyanin from the cyanobacterium Cyanidium caldarium with novel crystal packing has been solved at 1.65-A resolution. The structure has been refined to an R value of 18.3% with excellent backbone and side-chain stereochemical parameters. In crystals of phycocyanin used in this study, the hexamers are offset rather than aligned as in other phycocyanins that have been crystallized to date. Analysis of this crystal's unique packing leads to a proposal for phycobilisome assembly in vivo and for a more prominent role for chromophore beta-155. This new role assigned to chromophore beta-155 in phycocyanin sheds light on the numerical relationships among and function of external chromophores found in phycoerythrins and phycoerythrocyanins.


    Organizational Affiliation

    Department of Chemistry, Merkert Chemistry Building, Boston College, Chestnut Hill, Massachusetts 02167, USA. stec@bioc.rice.edu



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PHYCOCYANINA162Cyanidium caldariumMutation(s): 0 
Find proteins for P00306 (Galdieria sulphuraria)
Explore P00306 
Go to UniProtKB:  P00306
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PHYCOCYANINB172Cyanidium caldariumMutation(s): 0 
Find proteins for P00311 (Galdieria sulphuraria)
Explore P00311 
Go to UniProtKB:  P00311
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CYC
Query on CYC

Download CCD File 
A, B
PHYCOCYANOBILIN
C33 H40 N4 O6
VXTXPYZGDQPMHK-GMXXPEQVSA-N
 Ligand Interaction
PEB
Query on PEB

Download CCD File 
B
PHYCOERYTHROBILIN
C33 H40 N4 O6
NKCBCVIFPXGHAV-WAVSMFBNSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MEN
Query on MEN
BL-PEPTIDE LINKINGC5 H10 N2 O3ASN
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.183 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 106.42α = 90
b = 106.42β = 90
c = 176.18γ = 120
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
SDMSdata reduction
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-09-17
    Type: Initial release
  • Version 1.1: 2008-03-25
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance