6WH1 | pdb_00006wh1

Structure of the complex of human DNA ligase III-alpha and XRCC1 BRCT domains

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d6wh1a_	Alpha and beta proteins (a/b)	BRCT domain	BRCT domain	DNA-repair protein XRCC1	DNA-repair protein XRCC1	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d6wh1b_	Alpha and beta proteins (a/b)	BRCT domain	BRCT domain	DNA ligase	automated matches	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	BRCT domain-like	8044009	3000159	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	BRCT domain-like	8034117	3000159	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)
A	PTCB-BRCT	e6wh1A1	A: a/b three-layered sandwiches	X: BRCT domain (From Topology)	H: BRCT domain (From Topology)	T: BRCT domain	F: PTCB-BRCT	ECOD (1.6)
B	LIG3_BRCT	e6wh1B1	A: a/b three-layered sandwiches	X: BRCT domain (From Topology)	H: BRCT domain (From Topology)	T: BRCT domain	F: LIG3_BRCT	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00533	BRCA1 C Terminus (BRCT) domain (BRCT)	BRCA1 C Terminus (BRCT) domain	The BRCT domain is found predominantly in proteins involved in cell cycle checkpoint functions responsive to DNA damage. The BRCT domain of XRCC1 forms a homodimer in the crystal structure. This suggests that pairs of BRCT domains associate as homo- ...	The BRCT domain is found predominantly in proteins involved in cell cycle checkpoint functions responsive to DNA damage. The BRCT domain of XRCC1 forms a homodimer in the crystal structure. This suggests that pairs of BRCT domains associate as homo- or heterodimers. BRCT domains are often found as tandem-repeat pairs [2]. Structures of the BRCA1 BRCT domains revealed a basis for a widely utilised head-to-tail BRCT-BRCT oligomerisation mode [3]. This conserved tandem BRCT architecture facilitates formation of the canonical BRCT phospho-peptide interaction cleft at a groove between the BRCT domains. Disease associated missense and nonsense mutations in the BRCA1 BRCT domains disrupt peptide binding by directly occluding this peptide binding groove, or by disrupting key conserved BRCT core folding determinants [5].	Domain
B	PF16759	DNA ligase 3 BRCT domain (LIG3_BRCT)	DNA ligase 3 BRCT domain	The BRCT domain of DNA ligase 3 (LIG3) binds to the C-terminal BRCT domain of the scaffolding protein X-ray repair cross-complementing protein 1 (XRCC1) and mediates homo- and heterodimerisation [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	X-ray repair cross complementing protein 1 variant	DNA binding oxidized DNA binding binding damaged DNA binding nucleic acid binding endonuclease activity catalytic activity, acting on a nucleic acid hydrolase activity 3' overhang single-stranded DNA endodeoxyribonuclease activity single-stranded DNA endodeoxyribonuclease activity DNA nuclease activity DNA endonuclease activity hydrolase activity, acting on ester bonds catalytic activity, acting on DNA DNA binding oxidized DNA binding binding damaged DNA binding nucleic acid binding endonuclease activity catalytic activity, acting on a nucleic acid hydrolase activity 3' overhang single-stranded DNA endodeoxyribonuclease activity single-stranded DNA endodeoxyribonuclease activity DNA nuclease activity DNA endonuclease activity hydrolase activity, acting on ester bonds catalytic activity, acting on DNA nuclease activity catalytic activity ADP-D-ribose modification-dependent protein binding protein binding modification-dependent protein binding poly-ADP-D-ribose binding carbohydrate derivative binding enzyme binding	regulation of molecular function regulation of catalytic activity negative regulation of transferase activity biological regulation negative regulation of molecular function negative regulation of catalytic activity regulation of transferase activity negative regulation of protein ADP-ribosylation regulation of protein ADP-ribosylation developmental process multicellular organismal process head development forebrain development animal organ development regulation of molecular function regulation of catalytic activity negative regulation of transferase activity biological regulation negative regulation of molecular function negative regulation of catalytic activity regulation of transferase activity negative regulation of protein ADP-ribosylation regulation of protein ADP-ribosylation developmental process multicellular organismal process head development forebrain development animal organ development brain development nervous system development pallium development multicellular organism development central nervous system development anatomical structure development telencephalon development hippocampus development limbic system development system development cellular response to stimulus telomere maintenance in response to DNA damage negative regulation of telomere maintenance regulation of cellular process response to stimulus regulation of cellular response to stress negative regulation of biological process telomere organization regulation of primary metabolic process nucleobase-containing compound metabolic process negative regulation of chromosome organization negative regulation of nucleobase-containing compound metabolic process negative regulation of telomere maintenance in response to DNA damage regulation of nucleobase-containing compound metabolic process regulation of biological process negative regulation of cellular component organization negative regulation of metabolic process primary metabolic process DNA metabolic process regulation of chromosome organization regulation of organelle organization telomere maintenance telomere capping regulation of response to stimulus metabolic process macromolecule metabolic process regulation of metabolic process regulation of DNA metabolic process regulation of telomere maintenance regulation of cellular component organization regulation of protection from non-homologous end joining at telomere cellular component organization cellular response to stress response to stress regulation of response to stress negative regulation of cellular process cellular component organization or biogenesis negative regulation of macromolecule metabolic process regulation of telomere maintenance in response to DNA damage negative regulation of response to stimulus protection from non-homologous end joining at telomere chromosome organization regulation of macromolecule metabolic process negative regulation of protection from non-homologous end joining at telomere nucleic acid metabolic process organelle organization negative regulation of organelle organization DNA damage response cellular process negative regulation of telomere capping negative regulation of DNA metabolic process regulation of telomere capping DNA recombination mitotic recombination telomeric DNA-containing double minutes formation telomere maintenance via recombination single strand break repair DNA repair base-excision repair regulation of base-excision repair regulation of DNA repair response to oxidative stress response to chemical response to oxygen-containing compound response to hydroperoxide double-strand break repair double-strand break repair via nonhomologous end joining	membrane-bounded organelle protein-containing complex intracellular anatomical structure nucleus nuclear protein-containing complex intracellular membrane-bounded organelle intracellular organelle cellular anatomical structure organelle nucleotide-excision repair complex ERCC4-ERCC1 complex membrane-enclosed lumen intracellular membraneless organelle nucleolus membrane-bounded organelle protein-containing complex intracellular anatomical structure nucleus nuclear protein-containing complex intracellular membrane-bounded organelle intracellular organelle cellular anatomical structure organelle nucleotide-excision repair complex ERCC4-ERCC1 complex membrane-enclosed lumen intracellular membraneless organelle nucleolus intracellular organelle lumen organelle lumen membraneless organelle nuclear lumen nucleoplasm chromatin chromosome chromosome, telomeric region chromosomal region site of DNA damage
B	DNA ligase 3 alpha	ligase activity, forming phosphoric ester bonds catalytic activity, acting on DNA catalytic activity, acting on a nucleic acid catalytic activity DNA ligase activity ligase activity DNA ligase (ATP) activity binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding ligase activity, forming phosphoric ester bonds catalytic activity, acting on DNA catalytic activity, acting on a nucleic acid catalytic activity DNA ligase activity ligase activity DNA ligase (ATP) activity binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding DNA binding nucleic acid binding cation binding transition metal ion binding zinc ion binding metal ion binding	DNA-templated DNA replication lagging strand elongation primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process DNA strand elongation DNA replication metabolic process cellular process DNA strand elongation involved in DNA replication macromolecule metabolic process regulation of cellular process negative regulation of biological process DNA-templated DNA replication lagging strand elongation primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process DNA strand elongation DNA replication metabolic process cellular process DNA strand elongation involved in DNA replication macromolecule metabolic process regulation of cellular process negative regulation of biological process mitochondrial DNA metabolic process regulation of primary metabolic process negative regulation of DNA-templated DNA replication negative regulation of cellular process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process negative regulation of macromolecule metabolic process regulation of biological process negative regulation of DNA replication negative regulation of metabolic process biological regulation regulation of macromolecule metabolic process mitochondrial DNA replication negative regulation of mitochondrial DNA replication regulation of DNA-templated DNA replication negative regulation of DNA metabolic process regulation of mitochondrial DNA replication negative regulation of mitochondrial DNA metabolic process regulation of metabolic process regulation of mitochondrial DNA metabolic process regulation of DNA metabolic process regulation of DNA replication cell division nucleobase-containing compound biosynthetic process macromolecule biosynthetic process nucleic acid biosynthetic process biosynthetic process DNA biosynthetic process cellular response to stimulus double-strand break repair response to stimulus DNA recombination cellular response to stress DNA damage response response to stress recombinational repair double-strand break repair via homologous recombination DNA repair base-excision repair mitochondrial DNA repair base-excision repair, gap-filling double-strand break repair via nonhomologous end joining double-strand break repair via alternative nonhomologous end joining cellular component organization organelle organization cellular component organization or biogenesis mitochondrion organization	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle protein-containing complex catalytic complex nucleus nuclear protein-containing complex DNA ligase III-XRCC1 complex membrane-enclosed lumen membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle protein-containing complex catalytic complex nucleus nuclear protein-containing complex DNA ligase III-XRCC1 complex membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen mitochondrial matrix

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR008979	Galactose-binding-like domain superfamily	Homologous Superfamily
A	IPR045080	XRCC1, first (central) BRCT domain	Domain
A	IPR001357	BRCT domain	Domain
A	IPR002706	DNA-repair protein Xrcc1, N-terminal	Domain
A	IPR036420	BRCT domain superfamily	Homologous Superfamily
B	IPR036599	DNA ligase, ATP-dependent, N-terminal domain superfamily	Homologous Superfamily
B	IPR036957	Zinc finger, PARP-type superfamily	Homologous Superfamily
B	IPR001357	BRCT domain	Domain
B	IPR012310	DNA ligase, ATP-dependent, central	Domain
B	IPR012308	DNA ligase, ATP-dependent, N-terminal	Domain
B	IPR036420	BRCT domain superfamily	Homologous Superfamily
B	IPR016059	DNA ligase, ATP-dependent, conserved site	Conserved Site
B	IPR000977	DNA ligase, ATP-dependent	Family
B	IPR031916	DNA ligase 3, BRCT domain	Domain
B	IPR001510	Zinc finger, PARP-type	Domain
B	IPR050191	ATP-dependent DNA ligase	Family
B	IPR012340	Nucleic acid-binding, OB-fold	Homologous Superfamily
B	IPR012309	DNA ligase, ATP-dependent, C-terminal	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: P18887	esophageal squamous cell carcinoma mixed glioma prostate cancer spinocerebellar ataxia, autosomal recessive 26 Erythema stomatitis malignant glioma osteosarcoma cancer gastric neoplasm malignant mesothelioma mesothelioma neurodegenerative disease benign mesothelioma childhood acute lymphoblastic leukemia esophageal squamous cell carcinoma mixed glioma prostate cancer spinocerebellar ataxia, autosomal recessive 26 Erythema stomatitis malignant glioma osteosarcoma cancer gastric neoplasm malignant mesothelioma mesothelioma neurodegenerative disease benign mesothelioma childhood acute lymphoblastic leukemia glioma lung carcinoma schizophrenia xeroderma pigmentosum colorectal cancer gastric cancer hereditary diffuse gastric adenocarcinoma medulloblastoma
B	Pharos: P49916	atypical teratoid rhabdoid tumor large cell medulloblastoma medulloblastoma primitive neuroectodermal tumor spina bifida breast cancer lung cancer non-small cell lung carcinoma psoriasis subependymal giant cell astrocytoma colorectal cancer malignant mesothelioma osteosarcoma rheumatoid arthritis

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 R01GM157729.