PROSITE documentation PDOC50837
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{PDOC50837} {PS50837; NACHT} {BEGIN} ******************************* * NACHT-NTPase domain profile * ******************************* The NACHT domain is a 300 to 400 residue predicted nucleoside triphosphatase (NTPase) domain, which is found in animal, fungal and bacterial proteins. The NACHT domain has been named after NAIP, CIITA, HET-E and TP1. It is found in association with other domains, such as the CARD domain (see <PDOC50209>), the DAPIN domain (see <PDOC50824>), the HEAT repeat (see <PDOC50077>), the WD repeat (see <PDOC00574>), the leucine-rich repeat (LRR) or the BIR repeat (see <PDOC00987) [1]. The NACHT domain consists of seven distinct conserved motifs, including the ATP/GTPase specific P-loop (see <PDOC00017>), the Mg(2+)-binding site (Walker A and B motifs, respectively) and five more specific motifs. The unique features of the NACHT domain include the prevalence of 'tiny' residues (glycine, alanine or serine) directly C-terminal of the Mg(2+)-coordinating aspartate in the Walker B motif, in place of a second acidic residue prevalent in other NTPases. A second acidic residue is typically found in the NACHT- containing proteins two positions downstream. Furthermore, the distal motif VII contains a conserved pattern of polar, aromatic and hydrophobic residues that is not seen in any other NTPase family [1]. Some proteins known to contain a NACHT domain are listed below: - Mammalian neuronal apoptosis inhibitor protein (NAIP). - Mammalian MHC class II transcription activator (CIITA). - Mammalian telomerase-associated protein (TP1). - Human CARD4 (NOD1), a pro-apoptotic protein, which activate NF-kappaB. - Streptomyces coelicolor predicted NTPases. - Synechocystis sp predicted NTPase. - Podosporina anserina incompatibility locus protein (HET-E). The profile we developed covers the entire NACHT domain. -Sequences known to belong to this class detected by the profile: ALL. -Other sequence(s) detected in Swiss-Prot: NONE. -Last update: January 2002 / First entry. [ 1] Koonin E.V., Aravind L. "The NACHT family - a new group of predicted NTPases implicated in apoptosis and MHC transcription activation." Trends Biochem. Sci. 25:223-224(2000). PubMed=10782090 -------------------------------------------------------------------------------- PROSITE is copyrighted by the SIB Swiss Institute of Bioinformatics and distributed under the Creative Commons Attribution-NonCommercial-NoDerivatives (CC BY-NC-ND 4.0) License, see https://prosite.expasy.org/prosite_license.html -------------------------------------------------------------------------------- {END}