Annotations: 4WJA

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	XRCC4 N-terminal domain-like	8053699	3001319	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	XRCC4 N-terminal domain-like	8053699	3001319	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	PAXX_1st	e4wjaA2	A: beta barrels	X: XRCC4, N-terminal domain-like	H: XRCC4, N-terminal domain (From Topology)	T: XRCC4, N-terminal domain	F: PAXX_1st	ECOD (1.6)
A	PAXX_2nd	e4wjaA3	A: alpha arrays	X: HTH	H: HTH	T: HTH motif inserted in other structures	F: PAXX_2nd	ECOD (1.6)
A	PAXX_3rd	e4wjaA1	A: alpha duplicates or obligate multimers	X: XRCC4 C-terminal oligomerization domain (From Topology)	H: XRCC4 C-terminal oligomerization domain (From Topology)	T: XRCC4 C-terminal oligomerization domain	F: PAXX_3rd	ECOD (1.6)
B	PAXX_1st	e4wjaB2	A: beta barrels	X: XRCC4, N-terminal domain-like	H: XRCC4, N-terminal domain (From Topology)	T: XRCC4, N-terminal domain	F: PAXX_1st	ECOD (1.6)
B	PAXX_2nd	e4wjaB3	A: alpha arrays	X: HTH	H: HTH	T: HTH motif inserted in other structures	F: PAXX_2nd	ECOD (1.6)
B	PAXX_3rd	e4wjaB1	A: alpha duplicates or obligate multimers	X: XRCC4 C-terminal oligomerization domain (From Topology)	H: XRCC4 C-terminal oligomerization domain (From Topology)	T: XRCC4 C-terminal oligomerization domain	F: PAXX_3rd	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF15384	PAXX, PAralog of XRCC4 and XLF, also called C9orf142 (PAXX)	PAXX, PAralog of XRCC4 and XLF, also called C9orf142	PAXX is a set of eukaryotic proteins that belong to the XRCC4 superfamily of DNA-double-strand break-repair proteins. PAXX interacts directly with DSB-repair protein Ku and is recruited to DNA-damage sites in cells thus functioning with XRCC4 and XLF ...	PAXX is a set of eukaryotic proteins that belong to the XRCC4 superfamily of DNA-double-strand break-repair proteins. PAXX interacts directly with DSB-repair protein Ku and is recruited to DNA-damage sites in cells thus functioning with XRCC4 and XLF to bring about DSB repair and cell survival in response to DSB-inducing agents [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Uncharacterized protein C9orf142	identical protein binding protein binding binding protein homodimerization activity protein dimerization activity molecular adaptor activity DNA polymerase binding enzyme binding	cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process double-strand break repair double-strand break repair via nonhomologous end joining primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process metabolic process macromolecule metabolic process cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process double-strand break repair double-strand break repair via nonhomologous end joining primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process metabolic process macromolecule metabolic process DNA repair	protein-containing complex nonhomologous end joining complex catalytic complex intracellular protein-containing complex DNA repair complex cellular anatomical structure intracellular anatomical structure cytoplasm intracellular organelle site of double-strand break organelle membraneless organelle site of DNA damage intracellular membraneless organelle protein-containing complex nonhomologous end joining complex catalytic complex intracellular protein-containing complex DNA repair complex cellular anatomical structure intracellular anatomical structure cytoplasm intracellular organelle site of double-strand break organelle membraneless organelle site of DNA damage intracellular membraneless organelle chromosome membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR027873	Protein PAXX	Family
A, B	IPR054134	Protein PAXX, N-terminal domain	Domain

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.