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Apoptosis. 2009 Nov;14(11):1255-65. doi: 10.1007/s10495-009-0402-2.

LFG: a candidate apoptosis regulatory gene family.

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Boston University, MA 02215, USA.


The expanding wealth of human, model and other organism's genomic data has allowed the identification of a distinct gene family of apoptotic related genes. Most of these genes are currently unannotated or have been subsumed under two questionably related gene families in the past. For example the transmembrane Bax inhibitor 1 (BI1) motif family has been reported to play a role in apoptosis and to consist of at least seven mammalian protein genes, GRINA, BI1, Lfg/FAIM2, Ghitm, RESC1/Tmbim1, GAAP/Tmbim4, and Tmbm1b. However, a detailed sequence and phylogenetic analysis shows that only five of these form a clear and unique protein family. This now provides information for understanding and investigating the biological roles of these proteins across a wide range of tissues in model organisms. The evolutionary relationships among these genes provide a powerful prospective for extrapolating to human conditions.

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