1QHG
STRUCTURE OF DNA HELICASE MUTANT WITH ADPNP
External Resource: Annotation
Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage
Chains | Domain Info | Class | Fold | Superfamily | Family | Domain | Species | Provenance Source (Version) |
---|---|---|---|---|---|---|---|---|
A | d1qhga1 | Alpha and beta proteins (a/b) | P-loop containing nucleoside triphosphate hydrolases | P-loop containing nucleoside triphosphate hydrolases | Tandem AAA-ATPase domain | DEXX box DNA helicase | (Geobacillus stearothermophilus ) [TaxId: 1422 ], | SCOPe (2.08) |
Domain Annotation: SCOP2 Classification SCOP2 Database Homepage
Domain Annotation: ECOD Classification ECOD Database Homepage
Chains | Family Name | Domain Identifier | Architecture | Possible Homology | Homology | Topology | Family | Provenance Source (Version) |
---|---|---|---|---|---|---|---|---|
A | UvrD-helicase | e1qhgA3 | A: a/b three-layered sandwiches | X: P-loop domains-like | H: P-loop domains-related | T: P-loop containing nucleoside triphosphate hydrolases | F: UvrD-helicase | ECOD (1.6) |
A | UvrD_C | e1qhgA4 | A: a/b three-layered sandwiches | X: P-loop domains-like | H: P-loop domains-related | T: P-loop containing nucleoside triphosphate hydrolases | F: UvrD_C | ECOD (1.6) |
Domain Annotation: CATH CATH Database Homepage
Chain | Domain | Class | Architecture | Topology | Homology | Provenance Source (Version) |
---|---|---|---|---|---|---|
A | 3.40.50.300 | Alpha Beta | 3-Layer(aba) Sandwich | Rossmann fold | P-loop containing nucleotide triphosphate hydrolases | CATH (4.3.0) |
A | 1.10.10.160 | Mainly Alpha | Orthogonal Bundle | Arc Repressor Mutant, subunit A | CATH (4.3.0) | |
A | 1.10.486.10 | Mainly Alpha | Orthogonal Bundle | PCRA | domain 4 | CATH (4.3.0) |
Protein Family Annotation Pfam Database Homepage
Chains | Accession | Name | Description | Comments | Source |
---|---|---|---|---|---|
PF13361 | UvrD-like helicase C-terminal domain (UvrD_C) | UvrD-like helicase C-terminal domain | This domain is found at the C-terminus of a wide variety of helicase enzymes. This domain has a AAA-like structural fold. | Domain | |
PF00580 | UvrD/REP helicase N-terminal domain (UvrD-helicase) | UvrD/REP helicase N-terminal domain | The Rep family helicases are composed of four structural domains. The Rep family function as dimers. REP helicases catalyse ATP dependent unwinding of double stranded DNA to single stranded DNA. Swiss:P23478, Swiss:P08394 have large insertions near t ... | Domain |
Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage
InterPro: Protein Family Classification InterPro Database Homepage
Chains | Accession | Name | Type |
---|---|---|---|
IPR014017 | UvrD-like DNA helicase, C-terminal | Domain | |
IPR014016 | UvrD-like helicase, ATP-binding domain | Domain | |
IPR005751 | ATP-dependent DNA helicase PcrA | Family | |
IPR000212 | DNA helicase, UvrD/REP type | Family | |
IPR013986 | DExx box DNA helicase domain superfamily | Homologous Superfamily | |
IPR027417 | P-loop containing nucleoside triphosphate hydrolase | Homologous Superfamily |
Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage
Chains | Enzyme Name | Description | Catalytic Residues |
---|---|---|---|
DNA helicase M-CSA #833 | PcrA DNA helicase is a 3'-5' DNA helicase. It is a single-stranded DNA (ssDNA)-dependent ATPase that uses the free energy of ATP hydrolysis to unwind duplex DNA. PcrA is known to be essential in some species, such as Bacillus subtilis and Staphylococcus aureus, with roles in DNA repair and rolling circle replication. This annotation covers the ATPase activity of PcrA. The conformational changes brought about through ATP binding, hydrolysis and subsequent release allow PcrA to bind to DNA and unwind the helix. In particular a Glutamine residue that binds to the gamma phosphate of ATP is part of the motif III switch which bridges the ATPase domain and the DNA binding domain. So the binding of the gamma phosphate and its cleavage from the ATP in the ATPase domain can result in conformational changes in the DNA binding domain which enables PcrA to bind to DNA. | Defined by 6 residues: LYS:A-37THR:A-38ASP:A-223GLU:A-224GLN:A-254ARG:A-610 | |