Glutamine aminotransferase (GAT, glutaminase) domain of glutamine-dependent NAD synthetases ...
2-238
1.13e-11
Glutamine aminotransferase (GAT, glutaminase) domain of glutamine-dependent NAD synthetases (class 7 and 8 nitrilases); Glutamine-dependent NAD synthetases are bifunctional enzymes, which have an N-terminal GAT domain and a C-terminal NAD+ synthetase domain. The GAT domain is a glutaminase (EC 3.5.1.2) which hydrolyses L-glutamine to L-glutamate and ammonia. The ammonia is used by the NAD+ synthetase domain in the ATP-dependent amidation of nicotinic acid adenine dinucleotide. Glutamine aminotransferases are categorized depending on their active site residues into different unrelated classes. This class of GAT domain belongs to a larger nitrilase superfamily comprised of nitrile- or amide-hydrolyzing enzymes and amide-condensing enzymes, which depend on a Glu-Lys-Cys catalytic triad. This superfamily has been classified in the literature based on global and structure based sequence analysis into thirteen different enzyme classes (referred to as 1-13), this subgroup corresponds to classes 7 and 8. Members of this superfamily generally form homomeric complexes, the basic building block of which is a homodimer. Mycobacterium tuberculosis glutamine-dependent NAD+ synthetase forms a homooctamer.
Pssm-ID: 143594 [Multi-domain] Cd Length: 261 Bit Score: 65.57 E-value: 1.13e-11
Glutamine aminotransferase (GAT, glutaminase) domain of glutamine-dependent NAD synthetases ...
2-238
1.13e-11
Glutamine aminotransferase (GAT, glutaminase) domain of glutamine-dependent NAD synthetases (class 7 and 8 nitrilases); Glutamine-dependent NAD synthetases are bifunctional enzymes, which have an N-terminal GAT domain and a C-terminal NAD+ synthetase domain. The GAT domain is a glutaminase (EC 3.5.1.2) which hydrolyses L-glutamine to L-glutamate and ammonia. The ammonia is used by the NAD+ synthetase domain in the ATP-dependent amidation of nicotinic acid adenine dinucleotide. Glutamine aminotransferases are categorized depending on their active site residues into different unrelated classes. This class of GAT domain belongs to a larger nitrilase superfamily comprised of nitrile- or amide-hydrolyzing enzymes and amide-condensing enzymes, which depend on a Glu-Lys-Cys catalytic triad. This superfamily has been classified in the literature based on global and structure based sequence analysis into thirteen different enzyme classes (referred to as 1-13), this subgroup corresponds to classes 7 and 8. Members of this superfamily generally form homomeric complexes, the basic building block of which is a homodimer. Mycobacterium tuberculosis glutamine-dependent NAD+ synthetase forms a homooctamer.
Pssm-ID: 143594 [Multi-domain] Cd Length: 261 Bit Score: 65.57 E-value: 1.13e-11
Uncharacterized subgroup of the nitrilase superfamily (putative class 13 nitrilases); The ...
2-235
7.02e-07
Uncharacterized subgroup of the nitrilase superfamily (putative class 13 nitrilases); The nitrilase superfamily is comprised of nitrile- or amide-hydrolyzing enzymes and amide-condensing enzymes, which depend on a Glu-Lys-Cys catalytic triad. This superfamily has been classified in the literature based on global and structure based sequence analysis into thirteen different enzyme classes (referred to as 1-13). Class 13 represents proteins that at the time were difficult to place in a distinct similarity group; this subgroup represents either a new class or one that was included previously in class 13. Members of this superfamily generally form homomeric complexes, the basic building block of which is a homodimer.
Pssm-ID: 143609 Cd Length: 261 Bit Score: 51.16 E-value: 7.02e-07
Uncharacterized subgroup of the nitrilase superfamily (putative class 13 nitrilases); The ...
2-268
1.34e-05
Uncharacterized subgroup of the nitrilase superfamily (putative class 13 nitrilases); The nitrilase superfamily is comprised of nitrile- or amide-hydrolyzing enzymes and amide-condensing enzymes, which depend on a Glu-Lys-Cys catalytic triad. This superfamily has been classified in the literature based on global and structure based sequence analysis into thirteen different enzyme classes (referred to as 1-13). Class 13 represents proteins that at the time were difficult to place in a distinct similarity group; this subgroup represents either a new class or one that was included previously in class 13. Members of this superfamily generally form homomeric complexes, the basic building block of which is a homodimer.
Pssm-ID: 143608 Cd Length: 258 Bit Score: 47.36 E-value: 1.34e-05
NAD(+) synthase; NAD(+) synthase (EC 6.3.5.1), a homodimer, catalyzes the final step in the de ...
252-316
3.59e-03
NAD(+) synthase; NAD(+) synthase (EC 6.3.5.1), a homodimer, catalyzes the final step in the de novo nicotinamide adenine dinucleotide (NAD(+)) biosynthesis, an amide transfer from either ammonia or glutamine to nicotinic acid adenine dinucleotide (NaAD). The conversion of NaAD to NAD(+) occurs via a NAD-adenylate intermediate and requires ATP and Mg(2+). The intermediate is subsequently cleaved into NAD(+) and AMP. In many prokaryotes, such as Escherichia coli, NAD synthase consists of a single domain and is strictly ammonia dependent. In contrast, eukaryotes and other prokaryotes have an additional N-terminal amidohydrolase domain that prefer glutamine. Interestingly, NAD(+) synthases in these prokaryotes, can also utilize ammonia as an amide source.
Pssm-ID: 467484 [Multi-domain] Cd Length: 248 Bit Score: 39.46 E-value: 3.59e-03
Database: CDSEARCH/cdd Low complexity filter: no Composition Based Adjustment: yes E-value threshold: 0.01
References:
Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
of the residues that compose this conserved feature have been mapped to the query sequence.
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Functional characterization of the conserved domain architecture found on the query.
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This image shows a graphical summary of conserved domains identified on the query sequence.
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if a domain or superfamily has been annotated with functional sites (conserved features),
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click on the bars or triangles to view your query sequence embedded in a multiple sequence alignment of the proteins used to develop the corresponding domain model.
The table lists conserved domains identified on the query sequence. Click on the plus sign (+) on the left to display full descriptions, alignments, and scores.
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Concise Display shows only the best scoring domain model, in each hit category listed below except non-specific hits, for each region on the query sequence.
(labeled illustration) Standard Display shows only the best scoring domain model from each source, in each hit category listed below for each region on the query sequence.
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