The Yip1 integral membrane domain contains four transmembrane alpha helices. The domain is characterised by the motifs DLYGP and GY. The Yip1 protein is a golgi protein involved in vesicular transport that interacts with GTPases [1].

1: Specific binding to a novel and essential Golgi membrane protein (Yip1p) functionally links the transport GTPases Ypt1p and Ypt31p. Yang X, Matern HT, Gallwitz D; EMBO J 1998;17:4954-4963. PMID:9724632