Homologous Superfamily

Photosystem I, reaction centre subunit PsaD superfamily (IPR036579)

Short name: PsaD_sf

Overlapping entries


PsaD is a small, extrinsic polypeptide located on the stromal side (cytoplasmic side in cyanobacteria) of the photosystem I reaction centre complex. It is required for native assembly of PSI reaction clusters and is implicated in the electrostatic binding of ferredoxin within the reaction centre [PMID: 9692933]. PsaD forms a dimer in solution which is bound by PsaE however PsaD is monomeric in its native complexed PSI environment [PMID: 9692933].

Structurally, PsaD has a beta-BETA(2)-beta-alpha-beta(2) fold with antiparallel sheet packed against helix, has BETA-hairpin on the same side and has an irregular C-terminal tail.

GO terms

Biological Process

GO:0015979 photosynthesis

Molecular Function

No terms assigned in this category.

Cellular Component

GO:0009522 photosystem I
GO:0009538 photosystem I reaction center

Contributing signatures

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