Chloroplast protein import component Toc86/159 (IPR005690)

Short name: Toc86_159

Overlapping homologous superfamilies


Family relationships



Two integral outer envelope GTPases, Toc34 and Toc86, are proposed to regulate the recognition and translocation of nuclear-encoded preproteins during the early stages of protein import into chloroplasts. The long precursor of the 86K protein (corresponding to a native protein of 159 kDa termed Toc159) is proposed to have three domains. The N-terminal A-domain is acidic, repetitive, weakly conserved, readily removed by proteolysis during chloroplast isolation, and not required for protein translocation [PMID: 10712545]. The other domains are designated G (GTPase) and M (membrane anchor) [PMID: 10712545]. The signature for this family includes most of the G domain and all of M.

GO terms

Biological Process

No terms assigned in this category.

Molecular Function

GO:0016817 hydrolase activity, acting on acid anhydrides

Cellular Component

No terms assigned in this category.

Contributing signatures

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