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Available structures
PDB Ortholog search: PDBe RCSB
Aliases VAPB, ALS8, VAMP-B, VAP-B, VAMP (vesicle-associated membrane protein)-associated protein B and C, VAMP associated protein B and C
External IDs MGI: 1928744 HomoloGene: 36163 GeneCards: VAPB
RNA expression pattern
PBB GE VAPB 202549 at fs.png

PBB GE VAPB 202550 s at fs.png
More reference expression data
Species Human Mouse
RefSeq (mRNA)



RefSeq (protein)



Location (UCSC) Chr 20: 58.39 – 58.45 Mb Chr 2: 173.74 – 173.78 Mb
PubMed search [1] [2]
View/Edit Human View/Edit Mouse

Vesicle-associated membrane protein-associated protein B/C is a protein that in humans is encoded by the VAPB gene.[3][4] The VAPB gene is found on the 20th human chromosome. Together with VAPA, it forms the VAP protein family.


The protein encoded by this gene is a type IV membrane protein found in plasma and intracellular vesicle membranes. The encoded protein is found as a homodimer and as a heterodimer with VAPA. This protein also can interact with VAMP1 and VAMP2 and may be involved in vesicle trafficking.[4]

Like VAPA, VAPB binds to proteins that contain a FFAT motif.[5] Considerable interest in VAPB has arisen because mutations in this protein are associated with rare, familial forms of Motor Neurone Disease (also called Amyotrophic Lateral Sclerosis and Lou Gehrig's disease).[6]


  1. ^ "Human PubMed Reference:". 
  2. ^ "Mouse PubMed Reference:". 
  3. ^ Nishimura Y, Hayashi M, Inada H, Tanaka T (Jan 1999). "Molecular cloning and characterization of mammalian homologues of vesicle-associated membrane protein-associated (VAMP-associated) proteins". Biochemical and Biophysical Research Communications. 254 (1): 21–6. PMID 9920726. doi:10.1006/bbrc.1998.9876. 
  4. ^ a b "Entrez Gene: VAPB VAMP (vesicle-associated membrane protein)-associated protein B and C". 
  5. ^ Loewen CJ, Roy A, Levine TP (May 2003). "A conserved ER targeting motif in three families of lipid binding proteins and in Opi1p binds VAP". The EMBO Journal. 22 (9): 2025–35. PMC 156073Freely accessible. PMID 12727870. doi:10.1093/emboj/cdg201. 
  6. ^ Nishimura AL, Mitne-Neto M, Silva HC, Richieri-Costa A, Middleton S, Cascio D, Kok F, Oliveira JR, Gillingwater T, Webb J, Skehel P, Zatz M (Nov 2004). "A mutation in the vesicle-trafficking protein VAPB causes late-onset spinal muscular atrophy and amyotrophic lateral sclerosis". American Journal of Human Genetics. 75 (5): 822–31. PMC 1182111Freely accessible. PMID 15372378. doi:10.1086/425287. 

Further reading[edit]