Peptide transporter 3 (IPR031124)

Short name: Pept-3

Overlapping homologous superfamilies


Family relationships


This is a family of oligopeptide transporters nematodes (round worms) which includes oligopeptide transporter 3 (OPT3) from Caenorhabditis elegans. OPT3 can mediate the H+-coupled transport of peptides, but functions mainly as a H(+) channel. It is expressed exclusively in neurons. OPT3 probably plays an important role in the maintenance of H(+) homeostasis and in the clearance of peptides arising from neuropeptide metabolism [PMID: 10734106].

GO terms

Biological Process

GO:0042938 dipeptide transport
GO:1902600 proton transmembrane transport

Molecular Function

GO:0071916 dipeptide transmembrane transporter activity
GO:0015252 proton channel activity

Cellular Component

No terms assigned in this category.

Contributing signatures

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