InterPro domain: IPR023618
General Information
- Identifier IPR023618
- Description Photosystem I PsaG/PsaK domain, chloroplastic
- Number of genes 275
- Gene duplication stats Loading...
- Associated GO terms GO:0009522 GO:0015979
Abstract
Photosystem I (PSI) [ 1 ] is an integral membrane protein complex that uses light energy to mediate electron transfer from plastocyanin to ferredoxin. It is found in the chloroplasts of plants and cyanobacteria. PSI is composed of at least 14 different subunits, two of which, PSI-G (gene psaG) and PSI-K (gene psaK), are small hydrophobic proteins of about 7 to 9 Kd and evolutionary related [ 2 ]. Both seem to contain two transmembrane regions. Cyanobacteria contain only PSI-K.
The domain represented by this entry consists of an alpha orthogonal bundle and it is found in photosystem I subunits PsaG and PsaK from chloroplasts.
1. Structure, function and organization of the Photosystem I reaction center complex. Biochim. Biophys. Acta 895, 167-204
2. The PSI-K subunit of photosystem I from barley (Hordeum vulgare L.). Evidence for a gene duplication of an ancestral PSI-G/K gene. J. Biol. Chem. 268, 18912-6