Protein superfamily

A protein superfamily is the largest grouping (clade) of proteins for which common ancestry can be inferred (see homology). Usually this common ancestry is inferred from structural alignment^[1] and mechanistic similarity, even if no sequence similarity is evident.^[2] Sequence homology can then be deduced even if not apparent (due to low sequence similarity). Superfamilies typically contain several protein families which show sequence similarity within each family. The term protein clan is commonly used for protease and glycosyl hydrolases superfamilies based on the MEROPS and CAZy classification systems.^[2]^[3]

^ Holm L, Rosenström P (July 2010). "Dali server: conservation mapping in 3D". Nucleic Acids Research. 38 (Web Server issue): W545–9. doi:10.1093/nar/gkq366. PMC 2896194. PMID 20457744.
^ ^a ^b Rawlings ND, Barrett AJ, Bateman A (January 2012). "MEROPS: the database of proteolytic enzymes, their substrates and inhibitors". Nucleic Acids Research. 40 (Database issue): D343–50. doi:10.1093/nar/gkr987. PMC 3245014. PMID 22086950.
^ Henrissat B, Bairoch A (June 1996). "Updating the sequence-based classification of glycosyl hydrolases". The Biochemical Journal. 316 (Pt 2): 695–6. doi:10.1042/bj3160695. PMC 1217404. PMID 8687420.

[:1-1] Holm L, Rosenström P (July 2010). "Dali server: conservation mapping in 3D". Nucleic Acids Research. 38 (Web Server issue): W545–9. doi:10.1093/nar/gkq366. PMC 2896194. PMID 20457744.

[merops-2] Rawlings ND, Barrett AJ, Bateman A (January 2012). "MEROPS: the database of proteolytic enzymes, their substrates and inhibitors". Nucleic Acids Research. 40 (Database issue): D343–50. doi:10.1093/nar/gkr987. PMC 3245014. PMID 22086950.

[Henrissat_1996-3] Henrissat B, Bairoch A (June 1996). "Updating the sequence-based classification of glycosyl hydrolases". The Biochemical Journal. 316 (Pt 2): 695–6. doi:10.1042/bj3160695. PMC 1217404. PMID 8687420.

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