Document Detail

Structural and functional properties of the cyanobacterial photosystem I complex.
MedLine Citation:
PMID:  2505837     Owner:  NLM     Status:  MEDLINE    
Photosystem I (PSI) complexes have been isolated from two cyanobacterial strains, Synechococcus sp. PCC 7002 and 6301. These complexes contain six to seven low molecular mass subunits in addition to the two high molecular mass subunits previously shown to bind the primary reaction center components. Chemical cross-linking of ferredoxin to the complex identified a 17.5-kDa subunit as the ferredoxin-binding protein in the Synechococcus sp. PCC 6301-PSI complex. The amino acid sequence of this subunit, deduced from the DNA sequence of the gene, confirmed its identity as the psaD gene product. A 17-kDa subunit cross-links to the electron donor, cytochrome c-553, in a manner analogous to the cross-linking of plastocyanin to the higher plant PSI complex. Using antibodies raised against the spinach psaC gene product (a 9-kDa subunit which binds Fe-S centers A and B), we identified an analogous protein in the cyanobacterial PSI complex.
R M Wynn; J Omaha; R Malkin
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Biochemistry     Volume:  28     ISSN:  0006-2960     ISO Abbreviation:  Biochemistry     Publication Date:  1989 Jun 
Date Detail:
Created Date:  1989-10-13     Completed Date:  1989-10-13     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0370623     Medline TA:  Biochemistry     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  5554-60     Citation Subset:  IM    
Division of Molecular Plant Biology, University of California, Berkeley 94720.
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MeSH Terms
Amino Acid Sequence
Chlorophyll / genetics,  isolation & purification,  metabolism*
Cyanobacteria / genetics,  metabolism*
Light-Harvesting Protein Complexes
Macromolecular Substances
Molecular Sequence Data
Molecular Weight
Photosynthetic Reaction Center Complex Proteins
Photosystem I Protein Complex
Plant Proteins / genetics,  isolation & purification,  metabolism*
Sequence Homology, Nucleic Acid
Species Specificity
Reg. No./Substance:
0/Light-Harvesting Protein Complexes; 0/Macromolecular Substances; 0/Photosynthetic Reaction Center Complex Proteins; 0/Photosystem I Protein Complex; 0/Plant Proteins; 1406-65-1/Chlorophyll

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