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 ...
6-675
0e+00
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 TIGR03754:
Pssm-ID: 476819 Cd Length: 643 Bit Score: 718.76 E-value: 0e+00
conjugative coupling factor TraD, TOL family; Members of this protein are assigned by homology ...
6-675
0e+00
conjugative coupling factor TraD, TOL family; Members of this protein are assigned by homology to the TraD family of conjugative coupling factor. This particular clade serves as a marker for an extended gene region that occurs occasionally on plasmids, including the toluene catabolism TOL plasmid. More commonly, the gene region is chromosomal, flanked by various markers of conjugative transfer and insertion.
Pssm-ID: 274767 Cd Length: 643 Bit Score: 718.76 E-value: 0e+00
TraM recognition site of TraD and TraG; This family includes both TraG and TraD as well as ...
523-653
1.52e-12
TraM recognition site of TraD and TraG; This family includes both TraG and TraD as well as VirD4 proteins. TraG is essential for DNA transfer in bacterial conjugation. These proteins are thought to mediate interactions between the DNA-processing (Dtr) and the mating pair formation (Mpf) systems. This domain interacts with the relaxosome component TraM via the latter's tetramerization domain. TraD is a hexameric ring ATPase that forms the cytoplasmic face of the conjugative pore.
Pssm-ID: 432726 [Multi-domain] Cd Length: 125 Bit Score: 64.98 E-value: 1.52e-12
TrwB/TraG/TraD/VirD4 family of bacterial conjugation proteins; The TraG/TraD/VirD4 family are ...
470-588
1.93e-08
TrwB/TraG/TraD/VirD4 family of bacterial conjugation proteins; The TraG/TraD/VirD4 family are bacterial conjugation proteins involved in type IV secretion (T4S) systems, versatile bacterial secretion systems mediating transport of protein and/or DNA. They are present in gram-negative and gram-positive bacteria, as well as archaea. They form hexameric rings and belong to the RecA-like NTPases superfamily, which also includes the NTP binding domain of F1 and V1 H(+)ATPases, DnaB and related helicases as well as bacterial RecA and related eukaryotic and archaeal recombinases.
Pssm-ID: 410871 [Multi-domain] Cd Length: 144 Bit Score: 53.76 E-value: 1.93e-08
conjugative coupling factor TraD, TOL family; Members of this protein are assigned by homology ...
6-675
0e+00
conjugative coupling factor TraD, TOL family; Members of this protein are assigned by homology to the TraD family of conjugative coupling factor. This particular clade serves as a marker for an extended gene region that occurs occasionally on plasmids, including the toluene catabolism TOL plasmid. More commonly, the gene region is chromosomal, flanked by various markers of conjugative transfer and insertion.
Pssm-ID: 274767 Cd Length: 643 Bit Score: 718.76 E-value: 0e+00
conjugative coupling factor TraD, SXT/TOL subfamily; Members of this protein family are the ...
6-671
0e+00
conjugative coupling factor TraD, SXT/TOL subfamily; Members of this protein family are the putative conjugative coupling factor, TraD (or TraG), rather distantly related to the well-characterized TraD of the F plasmid. Members are associated with conjugative-transposon-like mobile genetic elements of the class that includes SXT, an antibiotic resistance transfer element in some Vibrio cholerae strains. [Mobile and extrachromosomal element functions, Other]
Pssm-ID: 274760 [Multi-domain] Cd Length: 634 Bit Score: 623.91 E-value: 0e+00
TraM recognition site of TraD and TraG; This family includes both TraG and TraD as well as ...
523-653
1.52e-12
TraM recognition site of TraD and TraG; This family includes both TraG and TraD as well as VirD4 proteins. TraG is essential for DNA transfer in bacterial conjugation. These proteins are thought to mediate interactions between the DNA-processing (Dtr) and the mating pair formation (Mpf) systems. This domain interacts with the relaxosome component TraM via the latter's tetramerization domain. TraD is a hexameric ring ATPase that forms the cytoplasmic face of the conjugative pore.
Pssm-ID: 432726 [Multi-domain] Cd Length: 125 Bit Score: 64.98 E-value: 1.52e-12
TrwB/TraG/TraD/VirD4 family of bacterial conjugation proteins; The TraG/TraD/VirD4 family are ...
470-588
1.93e-08
TrwB/TraG/TraD/VirD4 family of bacterial conjugation proteins; The TraG/TraD/VirD4 family are bacterial conjugation proteins involved in type IV secretion (T4S) systems, versatile bacterial secretion systems mediating transport of protein and/or DNA. They are present in gram-negative and gram-positive bacteria, as well as archaea. They form hexameric rings and belong to the RecA-like NTPases superfamily, which also includes the NTP binding domain of F1 and V1 H(+)ATPases, DnaB and related helicases as well as bacterial RecA and related eukaryotic and archaeal recombinases.
Pssm-ID: 410871 [Multi-domain] Cd Length: 144 Bit Score: 53.76 E-value: 1.93e-08
TrwB/TraG/TraD/VirD4 family of bacterial conjugation proteins; The TraG/TraD/VirD4 family are ...
197-234
2.43e-08
TrwB/TraG/TraD/VirD4 family of bacterial conjugation proteins; The TraG/TraD/VirD4 family are bacterial conjugation proteins involved in type IV secretion (T4S) systems, versatile bacterial secretion systems mediating transport of protein and/or DNA. They are present in gram-negative and gram-positive bacteria, as well as archaea. They form hexameric rings and belong to the RecA-like NTPases superfamily, which also includes the NTP binding domain of F1 and V1 H(+)ATPases, DnaB and related helicases as well as bacterial RecA and related eukaryotic and archaeal recombinases.
Pssm-ID: 410871 [Multi-domain] Cd Length: 144 Bit Score: 53.38 E-value: 2.43e-08
Type IV secretion-system coupling protein DNA-binding domain; The plasmid conjugative coupling ...
195-662
3.88e-08
Type IV secretion-system coupling protein DNA-binding domain; The plasmid conjugative coupling protein TrwB forms hexamers from six structurally very similar protomers. This hexamer contains a central channel running from the cytosolic pole (made up by the AADs) to the membrane pole ending at the transmembrane pore shaped by 12 transmembrane helices, rendering an overall mushroom-like structure. The TrwB_AAD (all-alpha domain) domain appears to be the DNA-binding domain of the structure. TrwB, a basic integral inner-membrane nucleoside-triphosphate-binding protein, is the structural prototype for the type IV secretion system coupling proteins, a family of proteins essential for macromolecular transport between cells and export.
Pssm-ID: 431268 [Multi-domain] Cd Length: 386 Bit Score: 56.15 E-value: 3.88e-08
Helicase HerA, central domain; This entry represents the central domain found in archaeal ...
197-257
6.76e-03
Helicase HerA, central domain; This entry represents the central domain found in archaeal proteins such as DNA double-strand break repair helicase HerA (EC:3.6.4.12). HerA is a helicase which is able to utilize either 3' or 5' single-stranded DNA extensions for loading and subsequent DNA duplex unwinding. It forms a complex with NurA nuclease, this complex has the 5'-3' DNA end resection activity and is essential for cell viability in the crenarchaeon Sulfolobus islandicus. This domain includes the the central RecA-like catalytic core and a flanking four-helix bundle. The function of this prokaryotic domain is unknown. It contains several conserved aspartates and histidines that could be metal ligands.
Pssm-ID: 376671 [Multi-domain] Cd Length: 220 Bit Score: 38.89 E-value: 6.76e-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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