id: Pfam:PF11854
pfam_id: PF11854
name: Putative outer membrane beta-barrel porin, MtrB/PioB
short_name: MtrB_PioB
seed_status: EX_DUF
characterization_status: UNSCORED
curation_status: SEEDED
source_url: https://www.ebi.ac.uk/interpro/api/entry/pfam/PF11854
counters:
  proteins: 523
  matches: 525
  proteomes: 318
  taxa: 611
  structures: 1
  alphafold_models: 311
  domain_architectures: 2
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:IPR020016
description: MtrB-PioB is a family of bacterial putative outer membrane porins. This family, is secreted
  as part of the pio (phototrophic iron oxidation) operon that has been found to couple the oxidation
  of ferrous iron [Fe(II)] to reductive CO2 fixation using light energy. PioABC is found in Rhodopseudomonas
  palustris and MtrB-PioB is likely to be a beta-barrel porin. Similar to other outer membrane porins,
  PioB and MtrB are predicted to have long loops protruding into the extracellular space and short turns
  on the periplasmic side [[cite:PUB00045463]].