BAR domains are dimerisation, lipid binding and curvature sensing modules found in many different protein families. A BAR domain with an additional N-terminal amphipathic helix (an N-BAR) can drive membrane curvature. These N-BAR domains are found in amphiphysin, endophilin, BRAP and Nadrin. BAR domains are also frequently found alongside domains that determine lipid specificity, like Pfam:PF00169 and Pfam:PF00787 domains in beta centaurins and sorting nexins respectively.

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2: BAR domains as sensors of membrane curvature: the amphiphysin BAR structure. Peter BJ, Kent HM, Mills IG, Vallis Y, Butler PJ, Evans PR, McMahon HT; Science. 2004;303:495-499. PMID:14645856

3: Mechanism of endophilin N-BAR domain-mediated membrane curvature. Gallop JL, Jao CC, Kent HM, Butler PJ, Evans PR, Langen R, McMahon HT; EMBO J. 2006;25:2898-2910. PMID:16763559

4: Crystal structure of the endophilin-A1 BAR domain. Weissenhorn W; J Mol Biol. 2005;351:653-661. PMID:16023669