A member of the syntaxin 18 complex
BNIPs belong to the proapoptotic BH3-only protein family. Three isoforms have been described so far. BNIP 1
is involved in the maintenance of ER-integrity. It is a member of the syntaxin 18
complex which is involved in membrane trafficking between the ER and Golgi. Four different BNIP 1 splice variants have been described so far, one of which contains a highly conserved BH3 domain. All BNIP 1 variants are able to interact with the apoptosis regulators BCL2 and BCL2L1.