P-loop NTPase (nucleoside triphosphate hydrolase) family protein contains two conserved sequence signatures, the Walker A motif (the P-loop proper) and Walker B motif which bind, respectively, the beta and gamma phosphate moieties of the bound nucleotide (typically ATP or GTP), and a Mg(2+) cation
P-loop containing Nucleoside Triphosphate Hydrolases; Members of the P-loop NTPase domain ...
24-297
3.94e-138
P-loop containing Nucleoside Triphosphate Hydrolases; Members of the P-loop NTPase domain superfamily are characterized by a conserved nucleotide phosphate-binding motif, also referred to as the Walker A motif (GxxxxGK[S/T], where x is any residue), and the Walker B motif (hhhh[D/E], where h is a hydrophobic residue). The Walker A and B motifs bind the beta-gamma phosphate moiety of the bound nucleotide (typically ATP or GTP) and the Mg2+ cation, respectively. The P-loop NTPases are involved in diverse cellular functions, and they can be divided into two major structural classes: the KG (kinase-GTPase) class which includes Ras-like GTPases and its circularly permutated YlqF-like; and the ASCE (additional strand catalytic E) class which includes ATPase Binding Cassette (ABC), DExD/H-like helicases, 4Fe-4S iron sulfur cluster binding proteins of NifH family, RecA-like F1-ATPases, and ATPases Associated with a wide variety of Activities (AAA). Also included are a diverse set of nucleotide/nucleoside kinase families.
The actual alignment was detected with superfamily member PRK09435:
Pssm-ID: 476819 Cd Length: 332 Bit Score: 393.42 E-value: 3.94e-138
methylmalonic aciduria associated protein; Methylmalonyl Co-A mutase-associated GTPase MeaB and its human homolog, methylmalonic aciduria associated protein (MMAA) are metallochaperones that function as a G-protein chaperone that assists AdoCbl cofactor delivery to the methylmalonyl-CoA mutase (MCM) and reactivation of the enzyme during catalysis. A member of the family, Escherichia coli ArgK, was previously thought to be a membrane ATPase which is required for transporting arginine, ornithine and lysine into the cells by the arginine and ornithine (AO system) and lysine, arginine and ornithine (LAO) transport systems.
Pssm-ID: 349768 Cd Length: 252 Bit Score: 342.24 E-value: 3.21e-119
Methylmalonyl Co-A mutase-associated GTPase MeaB; Family members were previously thought to be ...
25-264
1.96e-95
Methylmalonyl Co-A mutase-associated GTPase MeaB; Family members were previously thought to be ArgK proteins acting as ATPase enzymes and kinases. They are now believed to be methylmalonyl Co-A mutase-associated GTPase MeaB. Structural studies of MeaB and the human ortholog (methylmalonyl associated protein A) MMAA, reveal alpha-helical domains at the N- and C-termini as well as a Ras-like GTPase domain. Mutational analysis of MeaB, show prohibited growth in Methylobacterium due to the inability to convert methylmalonyl-CoA to succinyl-CoA caused by an inactive form of methylmalonyl-CoA mutatase (mcm). In humans, mutations in (MMAA) are associated with the fatal disease methylmalonyl aciduria.
Pssm-ID: 281323 [Multi-domain] Cd Length: 272 Bit Score: 282.79 E-value: 1.96e-95
LAO/AO transport system ATPase; In E. coli, mutation of this kinase blocks phosphorylation of ...
25-293
5.33e-85
LAO/AO transport system ATPase; In E. coli, mutation of this kinase blocks phosphorylation of two transporter system periplasmic binding proteins and consequently inhibits those transporters. This kinase is also found in Gram-positive bacteria, archaea, and the roundworm C. elegans. It may have a more general, but still unknown function. Mutations have also been found that do not phosphorylate the periplasmic binding proteins, yet still allow transport. The ATPase activity of this protein seems to be necessary, however. [Transport and binding proteins, Amino acids, peptides and amines, Regulatory functions, Protein interactions]
Pssm-ID: 129833 [Multi-domain] Cd Length: 300 Bit Score: 257.01 E-value: 5.33e-85
ATPases associated with a variety of cellular activities; AAA - ATPases associated with a ...
26-126
3.29e-03
ATPases associated with a variety of cellular activities; AAA - ATPases associated with a variety of cellular activities. This profile/alignment only detects a fraction of this vast family. The poorly conserved N-terminal helix is missing from the alignment.
Pssm-ID: 214640 [Multi-domain] Cd Length: 148 Bit Score: 37.35 E-value: 3.29e-03
methylmalonic aciduria associated protein; Methylmalonyl Co-A mutase-associated GTPase MeaB and its human homolog, methylmalonic aciduria associated protein (MMAA) are metallochaperones that function as a G-protein chaperone that assists AdoCbl cofactor delivery to the methylmalonyl-CoA mutase (MCM) and reactivation of the enzyme during catalysis. A member of the family, Escherichia coli ArgK, was previously thought to be a membrane ATPase which is required for transporting arginine, ornithine and lysine into the cells by the arginine and ornithine (AO system) and lysine, arginine and ornithine (LAO) transport systems.
Pssm-ID: 349768 Cd Length: 252 Bit Score: 342.24 E-value: 3.21e-119
Methylmalonyl Co-A mutase-associated GTPase MeaB; Family members were previously thought to be ...
25-264
1.96e-95
Methylmalonyl Co-A mutase-associated GTPase MeaB; Family members were previously thought to be ArgK proteins acting as ATPase enzymes and kinases. They are now believed to be methylmalonyl Co-A mutase-associated GTPase MeaB. Structural studies of MeaB and the human ortholog (methylmalonyl associated protein A) MMAA, reveal alpha-helical domains at the N- and C-termini as well as a Ras-like GTPase domain. Mutational analysis of MeaB, show prohibited growth in Methylobacterium due to the inability to convert methylmalonyl-CoA to succinyl-CoA caused by an inactive form of methylmalonyl-CoA mutatase (mcm). In humans, mutations in (MMAA) are associated with the fatal disease methylmalonyl aciduria.
Pssm-ID: 281323 [Multi-domain] Cd Length: 272 Bit Score: 282.79 E-value: 1.96e-95
LAO/AO transport system ATPase; In E. coli, mutation of this kinase blocks phosphorylation of ...
25-293
5.33e-85
LAO/AO transport system ATPase; In E. coli, mutation of this kinase blocks phosphorylation of two transporter system periplasmic binding proteins and consequently inhibits those transporters. This kinase is also found in Gram-positive bacteria, archaea, and the roundworm C. elegans. It may have a more general, but still unknown function. Mutations have also been found that do not phosphorylate the periplasmic binding proteins, yet still allow transport. The ATPase activity of this protein seems to be necessary, however. [Transport and binding proteins, Amino acids, peptides and amines, Regulatory functions, Protein interactions]
Pssm-ID: 129833 [Multi-domain] Cd Length: 300 Bit Score: 257.01 E-value: 5.33e-85
SIMIBI (signal recognition particle, MinD and BioD)-class NTPases; SIMIBI (after signal ...
28-122
1.20e-04
SIMIBI (signal recognition particle, MinD and BioD)-class NTPases; SIMIBI (after signal recognition particle, MinD, and BioD), consists of signal recognition particle (SRP) GTPases, the assemblage of MinD-like ATPases, which are involved in protein localization, chromosome partitioning, and membrane transport, and a group of metabolic enzymes with kinase or related phosphate transferase activity. Functionally, proteins in this superfamily use the energy from hydrolysis of NTP to transfer electron or ion.
Pssm-ID: 349751 [Multi-domain] Cd Length: 107 Bit Score: 40.49 E-value: 1.20e-04
CobW/HypB/UreG, nucleotide-binding domain; This domain is found in HypB, a hydrogenase ...
26-200
5.95e-04
CobW/HypB/UreG, nucleotide-binding domain; This domain is found in HypB, a hydrogenase expression / formation protein, and UreG a urease accessory protein. Both these proteins contain a P-loop nucleotide binding motif. HypB has GTPase activity and is a guanine nucleotide binding protein. It is not known whether UreG binds GTP or some other nucleotide. Both enzymes are involved in nickel binding. HypB can store nickel and is required for nickel dependent hydrogenase expression. UreG is required for functional incorporation of the urease nickel metallocenter. GTP hydrolysis may required by these proteins for nickel incorporation into other nickel proteins. This family of domains also contains P47K, a Pseudomonas chlororaphis protein needed for nitrile hydratase expression, and the cobW gene product, which may be involved in cobalamin biosynthesis in Pseudomonas denitrificans.
Pssm-ID: 396860 Cd Length: 179 Bit Score: 39.93 E-value: 5.95e-04
ATPases associated with a variety of cellular activities; AAA - ATPases associated with a ...
26-126
3.29e-03
ATPases associated with a variety of cellular activities; AAA - ATPases associated with a variety of cellular activities. This profile/alignment only detects a fraction of this vast family. The poorly conserved N-terminal helix is missing from the alignment.
Pssm-ID: 214640 [Multi-domain] Cd Length: 148 Bit Score: 37.35 E-value: 3.29e-03
An uncharacterized, circularly permuted subfamily of the Ras GTPases; This family represents ...
11-68
3.96e-03
An uncharacterized, circularly permuted subfamily of the Ras GTPases; This family represents archaeal GTPase typified by the protein MJ1464 from Methanococcus jannaschii. The members of this family show a circular permutation of the GTPase signature motifs so that C-terminal strands 5, 6, and 7 (strands 6 contain the NKxD motif) are relocated to the N terminus.
Pssm-ID: 206752 [Multi-domain] Cd Length: 157 Bit Score: 37.30 E-value: 3.96e-03
Circularly permuted YlqF GTPase; Proteins of the YlqF family contain all sequence motifs ...
5-56
4.41e-03
Circularly permuted YlqF GTPase; Proteins of the YlqF family contain all sequence motifs typical of the vast class of P-loop-containing GTPases, but show a circular permutation, with a G4-G1-G3 pattern of motifs as opposed to the regular G1-G3-G4 pattern seen in most GTPases. The YlqF subfamily is represented in all eukaryotes as well as a phylogenetically diverse array of bacteria (including gram-positive bacteria, proteobacteria, Synechocystis, Borrelia, and Thermotoga).
Pssm-ID: 206749 [Multi-domain] Cd Length: 171 Bit Score: 37.12 E-value: 4.41e-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.
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