Formin-binding protein 1 (IPR028532)

Short name: FNBP1/FBP17

Overlapping homologous superfamilies


Family relationships



Formin-binding protein 1 (FNBP1, also known as formin-binding protein 17) contains a N-terminal FER-CIP4 homology (FCH) domain and a C-terminal SH3 domain. It belongs to the CIP4 (Cdc42 interacting protein-4) subfamily of the F-BAR protein family. F-BAR proteins (F for FCH, Fer-CIP4 homology domain) are proteins with an extended CIP4-Fer domain. The F-BAR proteins have been implicated in cell membrane processes such as membrane invagination, tubulation and endocytosis [PMID: 23384583]. FNBP1 was originally isolated as a molecule that binds to the proline-rich region of formin [PMID: 8605874]. It induces tubular membrane invaginations and participates in endocytosis [PMID: 15252009]. It interacts with sorting nexin, SNX2, and is linked to acute myelogeneous leukemia [PMID: 11438682].

GO terms

Biological Process

GO:0006897 endocytosis

Molecular Function

No terms assigned in this category.

Cellular Component

No terms assigned in this category.

Contributing signatures

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