Translocon-associated protein subunit beta (IPR008856)

Short name: TRAP_beta

Overlapping homologous superfamilies


Family relationships



This family consists of several eukaryotic translocon-associated protein beta (TRAPB) or signal sequence receptor beta subunit (SSR-beta) proteins. The normal translocation of nascent polypeptides into the lumen of the endoplasmic reticulum (ER) is thought to be aided in part by a translocon-associated protein (TRAP) complex consisting of 4 protein subunits. The association of mature proteins with the ER and Golgi, or other intracellular locales, such as lysosomes, depends on the initial targeting of the nascent polypeptide to the ER membrane. A similar scenario must also exist for proteins destined for secretion [PMID: 11204460].

GO terms

Biological Process

No terms assigned in this category.

Molecular Function

No terms assigned in this category.

Cellular Component

GO:0005783 endoplasmic reticulum
GO:0016021 integral component of membrane

Contributing signatures

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