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HAD hydrolase-like protein
HAD family hydrolase
This family is structurally different from the alpha/beta hydrolase family (Pfam:PF00561). This family includes L-2-haloacid dehalogenase, epoxide hydrolases and phosphatases. The structure of the family consists of two domains. One is an inserted four helix bundle, which is the least well conserved region of the alignment, between residues 16 and 96 of Swiss:P24069. The rest of the fold is composed of the core alpha/beta domain [1]. Those members with the characteristic DxD triad at the N-terminus are probably phosphatidylglycerolphosphate (PGP) phosphatases involved in cardiolipin biosynthesis in the mitochondria [2]. [1]. 8702766. Crystal structure of L-2-haloacid dehalogenase from Pseudomonas. sp. YL. An alpha/beta hydrolase structure that is different from. the alpha/beta hydrolase fold.. Hisano T, Hata Y, Fujii T, Liu JQ, Kurihara T, Esaki N, Soda K;. J Biol Chem 1996;271:20322-20330.. [2]. 20485265. A mitochondrial phosphatase required for cardiolipin. biosynthesis: the PGP phosphatase Gep4.. Osman C, Haag M, Wieland FT, Brugger B, Langer T;. EMBO J. 2010;29:1976-1987 (from Pfam)
GMP/IMP nucleotidase
HAD-IA family hydrolase
This HMM represents part of one structural subfamily of the Haloacid Dehalogenase (HAD) superfamily of aspartate-nucleophile hydrolases. The superfamily is defined by the presence of three short catalytic motifs (PMID:7966317). HAD subfamilies are defined (PMID:11601995) based on the location and the observed or predicted fold of a so-called "capping domain" (PMID:10956028), or the absence of such a domain. Subfamily I consists of sequences in which the capping domain is found in between the first and second catalytic motifs. The Subfamily IA and IB capping domains are predicted by PSI-PRED to consist of an alpha helical bundle. This model represents variant 3 of subfamily IA, in which the HAD superfamily's third catalytic motif takes the form hhhhDDxxx(x)s, where _s_ refers to a small amino acid and _h_ to a hydrophobic one.
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