Homologous Superfamily

Photosystem I PsaG/PsaK domain, chloroplastic (IPR023618)

Short name: PSI_PsaG/PsaK_dom

Overlapping entries


Photosystem I (PSI) [PMID: 3333014] 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 [PMID: 8360180]. 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.

GO terms

Biological Process

GO:0015979 photosynthesis

Molecular Function

GO:0016168 chlorophyll binding

Cellular Component

GO:0009522 photosystem I

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.