Cdc6/Cdc18 family protein contains an N-terminal AAA+ ATPase domain and a C-terminal winged-helix (WH) domain, similar to human cell division control protein 6 homolog that is involved in the initiation of DNA replication
orc1/cdc6 family replication initiation protein; Members of this protein family are found ...
168-515
8.54e-43
orc1/cdc6 family replication initiation protein; Members of this protein family are found exclusively in the archaea. This set of DNA binding proteins shows homology to the origin recognition complex subunit 1/cell division control protein 6 family in eukaryotes. Several members may be found in genome and interact with each other. [DNA metabolism, DNA replication, recombination, and repair]
Pssm-ID: 274354 [Multi-domain] Cd Length: 365 Bit Score: 156.64 E-value: 8.54e-43
CDC6, C terminal; The C terminal domain of CDC6 assumes a winged helix fold, with a five ...
464-544
1.23e-16
CDC6, C terminal; The C terminal domain of CDC6 assumes a winged helix fold, with a five alpha-helical bundle (alpha15-alpha19) structure, backed on one side by three beta strands (beta6-beta8). It has been shown that this domain acts as a DNA-localisation factor, however its exact function is, as yet, unknown. Putative functions include: (1) mediation of protein-protein interactions and (2) regulation of nucleotide binding and hydrolysis. Mutagenesis studies have shown that this domain is essential for appropriate Cdc6 activity.
Pssm-ID: 215013 [Multi-domain] Cd Length: 84 Bit Score: 74.98 E-value: 1.23e-16
Winged-helix domain of essential DNA replication protein Cell division control protein (Cdc6), ...
457-540
4.13e-16
Winged-helix domain of essential DNA replication protein Cell division control protein (Cdc6), which mediates DNA binding; This model characterizes the winged-helix, C-terminal domain of the Cell division control protein (Cdc6_C). Cdc6 (also known as Cell division cycle 6 or Cdc18) functions as a regulator at the early stages of DNA replication, by helping to recruit and load the Minichromosome Maintenance Complex (MCM) onto DNA and may have additional roles in the control of mitotic entry. Precise duplication of chromosomal DNA is required for genomic stability during replication. Cdc6 has an essential role in DNA replication and irregular expression of Cdc6 may lead to genomic instability. Cdc6 over-expression is observed in many cancerous lesions. DNA replication begins when an origin recognition complex (ORC) binds to a replication origin site on the chromatin. Studies indicate that Cdc6 interacts with ORC through the Orc1 subunit, and that this association increases the specificity of the ORC-origins interaction. Further studies suggest that hydrolysis of Cdc6-bound ATP promotes the association of the replication licensing factor Cdt1 with origins through an interaction with Orc6 and this in turn promotes the loading of MCM2-7 helicase onto chromatin. The MCM2-7 complex promotes the unwinding of DNA origins, and the binding of additional factors to initiate the DNA replication. S-Cdk (S-phase cyclin and cyclin-dependent kinase complex) prevents rereplication by causing the Cdc6 protein to dissociate from ORC and prevents the Cdc6 and MCM proteins from reassembling at any origin. By phosphorylating Cdc6, S-Cdk also triggers Cdc6's ubiquitination. The Cdc6 protein is composed of three domains, an N-terminal AAA+ domain with Walker A and B, and Sensor-1 and -2 motifs. The central region contains a conserved nucleotide binding/ATPase domain and is a member of the ATPase superfamily. The C-terminal domain (Cdc6_C) is a conserved winged-helix domain that possibly mediates protein-protein interactions or direct DNA interactions. Cdc6 is conserved in eukaryotes, and related genes are found in Archaea. The winged helix fold structure of Cdc6_C is similar to the structures of other eukaryotic replication initiators without apparent sequence similarity.
Pssm-ID: 176573 [Multi-domain] Cd Length: 87 Bit Score: 73.42 E-value: 4.13e-16
CDC6, C terminal winged helix domain; The C terminal domain of CDC6 assumes a winged helix ...
464-543
7.10e-16
CDC6, C terminal winged helix domain; The C terminal domain of CDC6 assumes a winged helix fold, with a five alpha-helical bundle (alpha15-alpha19) structure, backed on one side by three beta strands (beta6-beta8). It has been shown that this domain acts as a DNA-localization factor, however its exact function is, as yet, unknown. Putative functions include: (1) mediation of protein-protein interactions and (2) regulation of nucleotide binding and hydrolysis. Mutagenesis studies have shown that this domain is essential for appropriate Cdc6 activity.
Pssm-ID: 462672 Cd Length: 84 Bit Score: 72.62 E-value: 7.10e-16
orc1/cdc6 family replication initiation protein; Members of this protein family are found ...
168-515
8.54e-43
orc1/cdc6 family replication initiation protein; Members of this protein family are found exclusively in the archaea. This set of DNA binding proteins shows homology to the origin recognition complex subunit 1/cell division control protein 6 family in eukaryotes. Several members may be found in genome and interact with each other. [DNA metabolism, DNA replication, recombination, and repair]
Pssm-ID: 274354 [Multi-domain] Cd Length: 365 Bit Score: 156.64 E-value: 8.54e-43
CDC6, C terminal; The C terminal domain of CDC6 assumes a winged helix fold, with a five ...
464-544
1.23e-16
CDC6, C terminal; The C terminal domain of CDC6 assumes a winged helix fold, with a five alpha-helical bundle (alpha15-alpha19) structure, backed on one side by three beta strands (beta6-beta8). It has been shown that this domain acts as a DNA-localisation factor, however its exact function is, as yet, unknown. Putative functions include: (1) mediation of protein-protein interactions and (2) regulation of nucleotide binding and hydrolysis. Mutagenesis studies have shown that this domain is essential for appropriate Cdc6 activity.
Pssm-ID: 215013 [Multi-domain] Cd Length: 84 Bit Score: 74.98 E-value: 1.23e-16
Winged-helix domain of essential DNA replication protein Cell division control protein (Cdc6), ...
457-540
4.13e-16
Winged-helix domain of essential DNA replication protein Cell division control protein (Cdc6), which mediates DNA binding; This model characterizes the winged-helix, C-terminal domain of the Cell division control protein (Cdc6_C). Cdc6 (also known as Cell division cycle 6 or Cdc18) functions as a regulator at the early stages of DNA replication, by helping to recruit and load the Minichromosome Maintenance Complex (MCM) onto DNA and may have additional roles in the control of mitotic entry. Precise duplication of chromosomal DNA is required for genomic stability during replication. Cdc6 has an essential role in DNA replication and irregular expression of Cdc6 may lead to genomic instability. Cdc6 over-expression is observed in many cancerous lesions. DNA replication begins when an origin recognition complex (ORC) binds to a replication origin site on the chromatin. Studies indicate that Cdc6 interacts with ORC through the Orc1 subunit, and that this association increases the specificity of the ORC-origins interaction. Further studies suggest that hydrolysis of Cdc6-bound ATP promotes the association of the replication licensing factor Cdt1 with origins through an interaction with Orc6 and this in turn promotes the loading of MCM2-7 helicase onto chromatin. The MCM2-7 complex promotes the unwinding of DNA origins, and the binding of additional factors to initiate the DNA replication. S-Cdk (S-phase cyclin and cyclin-dependent kinase complex) prevents rereplication by causing the Cdc6 protein to dissociate from ORC and prevents the Cdc6 and MCM proteins from reassembling at any origin. By phosphorylating Cdc6, S-Cdk also triggers Cdc6's ubiquitination. The Cdc6 protein is composed of three domains, an N-terminal AAA+ domain with Walker A and B, and Sensor-1 and -2 motifs. The central region contains a conserved nucleotide binding/ATPase domain and is a member of the ATPase superfamily. The C-terminal domain (Cdc6_C) is a conserved winged-helix domain that possibly mediates protein-protein interactions or direct DNA interactions. Cdc6 is conserved in eukaryotes, and related genes are found in Archaea. The winged helix fold structure of Cdc6_C is similar to the structures of other eukaryotic replication initiators without apparent sequence similarity.
Pssm-ID: 176573 [Multi-domain] Cd Length: 87 Bit Score: 73.42 E-value: 4.13e-16
CDC6, C terminal winged helix domain; The C terminal domain of CDC6 assumes a winged helix ...
464-543
7.10e-16
CDC6, C terminal winged helix domain; The C terminal domain of CDC6 assumes a winged helix fold, with a five alpha-helical bundle (alpha15-alpha19) structure, backed on one side by three beta strands (beta6-beta8). It has been shown that this domain acts as a DNA-localization factor, however its exact function is, as yet, unknown. Putative functions include: (1) mediation of protein-protein interactions and (2) regulation of nucleotide binding and hydrolysis. Mutagenesis studies have shown that this domain is essential for appropriate Cdc6 activity.
Pssm-ID: 462672 Cd Length: 84 Bit Score: 72.62 E-value: 7.10e-16
The AAA+ (ATPases Associated with a wide variety of cellular Activities) superfamily ...
178-330
5.44e-10
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: 57.93 E-value: 5.44e-10
ATPase family associated with various cellular activities (AAA); AAA family proteins often ...
198-338
3.58e-08
ATPase family associated with various cellular activities (AAA); AAA family proteins often perform chaperone-like functions that assist in the assembly, operation, or disassembly of protein complexes.
Pssm-ID: 459627 [Multi-domain] Cd Length: 130 Bit Score: 52.21 E-value: 3.58e-08
ATPases associated with a variety of cellular activities; AAA - ATPases associated with a ...
196-330
7.24e-07
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: 48.91 E-value: 7.24e-07
DEXS-box helicase domain of RecD and similar proteins; RecD is a member of the RecBCD (EC 3.1. ...
179-315
6.11e-03
DEXS-box helicase domain of RecD and similar proteins; RecD is a member of the RecBCD (EC 3.1.11.5, Exonuclease V) complex. It is the alpha chain of the complex and functions as a 3'-5' helicase. The RecBCD enzyme is both a helicase that unwinds, or separates the strands of DNA, and a nuclease that makes single-stranded nicks in DNA. RecD is a member of the DEAD-like helicase superfamily, a diverse family of proteins involved in ATP-dependent RNA or DNA unwinding. This domain contains the ATP-binding region.
Pssm-ID: 350691 [Multi-domain] Cd Length: 155 Bit Score: 37.53 E-value: 6.11e-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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