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 ...
3-508
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 pfam05872:
Pssm-ID: 476819 [Multi-domain] Cd Length: 503 Bit Score: 644.48 E-value: 0e+00
Helicase HerA-like C-terminal; HerA is a DNA helicase able to utilize either 3' or 5' ...
3-508
0e+00
Helicase HerA-like C-terminal; HerA is a DNA helicase 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 entry represents the C-terminal domain of HerA which seems to be involved in the conversion of ATP hydrolysis into DNA translocation.
Pssm-ID: 428657 [Multi-domain] Cd Length: 503 Bit Score: 644.48 E-value: 0e+00
TrwB/TraG/TraD/VirD4 family of bacterial conjugation proteins; The TraG/TraD/VirD4 family are ...
240-317
5.68e-04
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: 40.28 E-value: 5.68e-04
Helicase HerA-like C-terminal; HerA is a DNA helicase able to utilize either 3' or 5' ...
3-508
0e+00
Helicase HerA-like C-terminal; HerA is a DNA helicase 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 entry represents the C-terminal domain of HerA which seems to be involved in the conversion of ATP hydrolysis into DNA translocation.
Pssm-ID: 428657 [Multi-domain] Cd Length: 503 Bit Score: 644.48 E-value: 0e+00
AAA-like domain; This family of domains contain a P-loop motif that is characteriztic of the ...
266-370
1.73e-04
AAA-like domain; This family of domains contain a P-loop motif that is characteriztic of the AAA superfamily. Many of the proteins in this family are conjugative transfer proteins, including VirB4 components of the Type IV secretory pathway and conjugal transfer protein TrbE. This entry includes the arcaheal Vir4/HerA homolog CedB, a membrane-bound protein that is highly induced upon UV treatment and essential for DNA transfer between Sulfolobus cells.
Pssm-ID: 315512 [Multi-domain] Cd Length: 362 Bit Score: 43.92 E-value: 1.73e-04
TrwB/TraG/TraD/VirD4 family of bacterial conjugation proteins; The TraG/TraD/VirD4 family are ...
240-317
5.68e-04
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: 40.28 E-value: 5.68e-04
The AAA+ (ATPases Associated with a wide variety of cellular Activities) superfamily ...
14-86
1.77e-03
The AAA+ (ATPases Associated with a wide variety of cellular Activities) superfamily represents an ancient group of ATPases belonging to the ASCE (for additional strand, catalytic E) division of the P-loop NTPase fold. The ASCE division also includes ABC, RecA-like, VirD4-like, PilT-like, and SF1/2 helicases. Members of the AAA+ ATPases function as molecular chaperons, ATPase subunits of proteases, helicases, or nucleic-acid stimulated ATPases. The AAA+ proteins contain several distinct features in addition to the conserved alpha-beta-alpha core domain structure and the Walker A and B motifs of the P-loop NTPases.
Pssm-ID: 99707 [Multi-domain] Cd Length: 151 Bit Score: 39.05 E-value: 1.77e-03
TrwB/TraG/TraD/VirD4 family of bacterial conjugation proteins; The TraG/TraD/VirD4 family are ...
25-63
2.00e-03
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: 38.74 E-value: 2.00e-03
Type IV secretion-system coupling protein DNA-binding domain; The plasmid conjugative coupling ...
24-63
7.59e-03
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: 38.82 E-value: 7.59e-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.
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