Protein ACCUMULATION AND REPLICATION OF CHLOROPLASTS 6, chloroplastic

UniProtKB accession:  Q9FIG9

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Component of the plastid division machinery consisting in a binary fission accomplished by the simultaneous constriction of the FtsZ ring on the stromal side of the inner envelope membrane, and the ARC5 ring on the cytosolic side of the outer envelope membrane (PubMed:28248291, PubMed:29466386). Involved in the initiation of proplastid and plastid division (including chloroplasts, statoliths and leukoplasts) (PubMed:29466386). Promotes the assembly and/or stabilization of the plastid-dividing FtsZ ring, functioning as an antagonistic regulator of FtsZ dynamics against CDP1 and facilitating MCD1 positioning to membrane tethered FtsZ filaments to form the chloroplast Z-Ring; inhibits GDP-induced disassembly of FTSZ2 but enables ARC3 binding to FTSZ2-1 (PubMed:29466386, PubMed:29967285, PubMed:29769312, PubMed:29138260). Relays plastid division site position between stroma and outer surface via interactions with the stromal FtsZ ring and the outer membrane PDV2 that recruits cytoplasmic ARC5 ring (PubMed:28248291). Required for plastid equatorial positioning of PDV2 and ARC5. May contribute to gravitropism in stems and hypocotyls. Seems to influence stromule (stroma-filled tubular extensions of the plastid envelope membrane) length and frequency.