id: Pfam:PF03479
pfam_id: PF03479
name: Plants and Prokaryotes Conserved (PCC) domain
short_name: PCC
seed_status: EX_DUF
characterization_status: UNSCORED
curation_status: SEEDED
source_url: https://www.ebi.ac.uk/interpro/api/entry/pfam/PF03479
counters:
  proteins: 19177
  matches: 19300
  proteomes: 3910
  taxa: 7806
  structures: 7
  alphafold_models: 15108
  domain_architectures: 165
provenance:
  snapshot_id: interpro-pfam-duf-2026-10-10
  path: data/worklists/interpro-pfam-duf-2026-10-10.json
  sha256: 17fb625876c9326ed284263a47bcd84e0d7844a31c040dc06cd2260c36f1c383
  generated_at: '2026-10-10T07:44:21.614711Z'
  source_url: https://www.ebi.ac.uk/interpro/api/entry/pfam/
interpro_id: InterPro:IPR005175
description: This is a Plants and Prokaryotes Conserved (PPC) domain found in proteins that contain AT-hook
  motifs [pfam:PF02178] which strongly suggests a DNA-binding function for the proteins as a whole. Proteins
  with PPC domains are found in Bacteria, Archaea and the plant kingdom [[cite:PUB00074814],[cite:PUB00040306]].The
  PPC domain has a single alpha-helix packed against an antiparallel beta-sheet, which is formed by five
  beta-strands. There are three highly conserved histidine residues, eg at 117, 119 and 133 in [swissprot:Q46QL5]
  which appear to form a zinc-binding site, and the domain has been observed to form homotrimers. The
  domain co-occurs with a thioredoxin-like domain in uncharacterized cyanobacterial proteins [[cite:PUB00040306]].