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This family includes proteins from organisms that are not known to contain magnetosomes suggesting that this family of proteins have a broader function.","domain_architectures":25,"interpro_id":"IPR019109","known_evidence_count":null,"matches":10011,"name":"Magnetosome magnetite crystal formation protein family","partial_evidence_count":null,"pfam_id":"PF09685","proteins":10008,"proteomes":6722,"short_name":"MamF_MmsF","source_url":"https://www.ebi.ac.uk/interpro/api/entry/pfam/PF09685","structures":0,"taxa":9680,"unknown_status":"EX_DUF"},"inputs":{"cross_mech":"cross-mech-duf-examples-2026-10-10","members":"pfam-uniprot-uniref90-2026-10-07","protein_examples":"duf-protein-examples-2026-10-13","worklist":"interpro-pfam-duf-2026-10-10"},"members":[],"metadata":{"curation_status":"SEEDED","local_source":"source/data/families/PF09685.yaml","record":{"characterization_status":"UNSCORED","counters":{"alphafold_models":6286,"domain_architectures":25,"matches":10011,"proteins":10008,"proteomes":6722,"structures":0,"taxa":9680},"curation_status":"SEEDED","description":"This entry represents the magnetosome MamF/MmsF protein family found in magnetotactic bacteria. These membrane proteins are involved in magnetite crystal formation within magnetosome organelles. They are not essential for biomineralization, but play a major role in controlling the size and shape of magnetite crystals. Loss of these proteins results in crystals that are approximately 75% of wild-type size with altered morphology. They are multi-pass membrane proteins associated with the magnetosome membrane and exhibit cumulative, partially redundant functions in regulating crystal growth. 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