Annotations: 3AAF

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	Winged helix DNA-binding domain	8057669	3000034	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Winged helix DNA-binding domain	8057669	3000034	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	RQC	e3aafB1	A: alpha arrays	X: HTH	H: HTH	T: winged	F: RQC	ECOD (1.6)
A	RQC	e3aafA1	A: alpha arrays	X: HTH	H: HTH	T: winged	F: RQC	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	1.10.10.10	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain	CATH (4.3.0)
A	1.10.10.10	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Werner syndrome ATP-dependent helicase	cation binding manganese ion binding transition metal ion binding ion binding binding metal ion binding small molecule binding ATP-dependent activity, acting on DNA forked DNA-dependent helicase activity DNA helicase activity catalytic activity, acting on DNA catalytic activity, acting on a nucleic acid helicase activity catalytic activity cation binding manganese ion binding transition metal ion binding ion binding binding metal ion binding small molecule binding ATP-dependent activity, acting on DNA forked DNA-dependent helicase activity DNA helicase activity catalytic activity, acting on DNA catalytic activity, acting on a nucleic acid helicase activity catalytic activity ATP-dependent activity telomeric G-quadruplex DNA binding DNA binding sequence-specific DNA binding G-quadruplex DNA binding organic cyclic compound binding nucleic acid binding telomeric DNA binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding nuclease activity hydrolase activity, acting on ester bonds 3'-5' exonuclease activity hydrolase activity exonuclease activity protein-containing complex binding DNA secondary structure binding four-way junction DNA binding 3'-5' DNA helicase activity bubble DNA binding Y-form DNA binding chromatin binding mismatch repair complex binding MutLalpha complex binding magnesium ion binding flap-structured DNA binding 3'-flap-structured DNA binding identical protein binding protein binding protein homodimerization activity protein dimerization activity oxidized DNA binding oxidized purine DNA binding damaged DNA binding 8-hydroxy-2'-deoxyguanosine DNA binding telomeric D-loop binding D-loop DNA binding four-way junction helicase activity isomerase activity pyrophosphatase activity ATP hydrolysis activity ribonucleoside triphosphate phosphatase activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity, acting on acid anhydrides	cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process nucleobase-containing compound metabolic process DNA-templated DNA replication DNA replication DNA-templated DNA replication maintenance of fidelity metabolic process primary metabolic process DNA metabolic process macromolecule metabolic process cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process nucleobase-containing compound metabolic process DNA-templated DNA replication DNA replication DNA-templated DNA replication maintenance of fidelity metabolic process primary metabolic process DNA metabolic process macromolecule metabolic process replication fork processing nucleic acid metabolic process replicative senescence cellular metabolic process cellular component organization G-quadruplex DNA unwinding organelle organization DNA geometric change chromosome organization DNA conformation change cellular component organization or biogenesis formation of extrachromosomal circular DNA telomere organization telomere maintenance cellular component biogenesis cellular component assembly telomere maintenance via telomere trimming t-circle formation cellular senescence DNA duplex unwinding regulation of biological process positive regulation of nucleobase-containing compound metabolic process positive regulation of strand invasion DNA recombination biological regulation positive regulation of biological process regulation of macromolecule metabolic process DNA strand invasion regulation of primary metabolic process positive regulation of metabolic process positive regulation of DNA metabolic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process regulation of strand invasion regulation of metabolic process regulation of DNA metabolic process cellular response to nutrient levels response to nutrient levels response to starvation cellular response to starvation base-excision repair DNA repair cellular response to ionizing radiation cellular response to radiation cellular response to environmental stimulus response to ionizing radiation cellular response to gamma radiation response to radiation response to abiotic stimulus cellular response to abiotic stimulus response to gamma radiation protein localization localization cellular localization protein localization to nucleolus protein localization to organelle cellular macromolecule localization macromolecule localization protein localization to nucleus telomeric loop disassembly telomeric D-loop disassembly multicellular organismal process determination of adult lifespan double-strand break repair recombinational repair double-strand break repair via homologous recombination nuclear DNA replication cell cycle DNA replication telomere maintenance via semi-conservative replication cell cycle cell cycle process response to oxidative stress cellular biosynthetic process nucleobase-containing compound biosynthetic process DNA synthesis involved in DNA repair macromolecule biosynthetic process nucleic acid biosynthetic process biosynthetic process DNA biosynthetic process response to light stimulus response to UV-C response to UV positive regulation of molecular function regulation of molecular function positive regulation of hydrolase activity regulation of catalytic activity regulation of hydrolase activity positive regulation of catalytic activity DNA unwinding involved in DNA replication regulation of growth growth regulation of growth rate	membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen cellular anatomical entity intracellular membrane-bounded organelle intracellular organelle lumen nuclear speck nuclear body intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen cellular anatomical entity intracellular membrane-bounded organelle intracellular organelle lumen nuclear speck nuclear body intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen cytoplasm intracellular non-membrane-bounded organelle chromosome non-membrane-bounded organelle chromosome, telomeric region chromosomal region nucleolus centrosome microtubule organizing center cytoskeleton microtubule cytoskeleton replication fork
C, D	DNA (5'-D(APCPCPCPTPAPAPTPTPAPGPGPGPT)-3')	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR036397	Ribonuclease H superfamily	Homologous Superfamily
A, B	IPR002121	HRDC domain	Domain
A, B	IPR011545	DEAD/DEAH box helicase domain	Domain
A, B	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
A, B	IPR010997	HRDC-like superfamily	Homologous Superfamily
A, B	IPR001650	Helicase, C-terminal domain-like	Domain
A, B	IPR036388	Winged helix-like DNA-binding domain superfamily	Homologous Superfamily
A, B	IPR014001	Helicase superfamily 1/2, ATP-binding domain	Domain
A, B	IPR036390	Winged helix DNA-binding domain superfamily	Homologous Superfamily
A, B	IPR029491	Helicase Helix-turn-helix domain	Domain
A, B	IPR004589	DNA helicase, ATP-dependent, RecQ type	Family
A, B	IPR032284	ATP-dependent DNA helicase RecQ, zinc-binding domain	Domain
A, B	IPR012337	Ribonuclease H-like superfamily	Homologous Superfamily
A, B	IPR002562	3'-5' exonuclease domain	Domain
A, B	IPR018982	RQC domain	Domain
A, B	IPR044876	HRDC domain superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B	Pharos: Q14191	Werner syndrome colorectal cancer osteosarcoma premature aging syndrome thyroid gland carcinoma Bloom syndrome Hutchinson-Gilford progeria syndrome lung cancer metabolic syndrome X peripheral nervous system disease prostate cancer cancer diabetes mellitus intellectual disability medulloblastoma Werner syndrome colorectal cancer osteosarcoma premature aging syndrome thyroid gland carcinoma Bloom syndrome Hutchinson-Gilford progeria syndrome lung cancer metabolic syndrome X peripheral nervous system disease prostate cancer cancer diabetes mellitus intellectual disability medulloblastoma osteogenesis imperfecta peripheral neuropathy psoriasis cataract DNA repair disease large cell medulloblastoma meningioma

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.