1K8G

Crystal Structure of the N-terminal domain of Oxytricha nova telomere end binding protein alpha subunit both uncomplexed and complexed with telomeric ssDNA

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
C [auth A]	d1k8ga1	All beta proteins	OB-fold	Nucleic acid-binding proteins	Single strand DNA-binding domain, SSB	Telomere end binding protein alpha subunit	(Sterkiella nova ) [TaxId: 200597 ],	SCOPe (2.08)
D [auth B]	d1k8gb1	All beta proteins	OB-fold	Nucleic acid-binding proteins	Single strand DNA-binding domain, SSB	Telomere end binding protein alpha subunit	(Sterkiella nova ) [TaxId: 200597 ],	SCOPe (2.08)
E [auth C]	d1k8gc1	All beta proteins	OB-fold	Nucleic acid-binding proteins	Single strand DNA-binding domain, SSB	Telomere end binding protein alpha subunit	(Sterkiella nova ) [TaxId: 200597 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
C [auth A]	SCOP2B Superfamily	Nucleic acid-binding proteins	8034296	3000135	SCOP2B (2022-06-29)
C [auth A]	SCOP2B Superfamily	Nucleic acid-binding proteins	8034298	3000135	SCOP2B (2022-06-29)
D [auth B]	SCOP2B Superfamily	Nucleic acid-binding proteins	8034296	3000135	SCOP2B (2022-06-29)
D [auth B]	SCOP2B Superfamily	Nucleic acid-binding proteins	8034298	3000135	SCOP2B (2022-06-29)
E [auth C]	SCOP2B Superfamily	Nucleic acid-binding proteins	8034298	3000135	SCOP2B (2022-06-29)
E [auth C]	SCOP2B Superfamily	Nucleic acid-binding proteins	8034296	3000135	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)
C [auth A]	SoSSB_OBF_like	e1k8gA2	A: beta barrels	X: OB-fold	H: Nucleic acid-binding proteins (From Topology)	T: Nucleic acid-binding proteins	F: SoSSB_OBF_like	ECOD (1.6)
C [auth A]	POT1	e1k8gA1	A: beta barrels	X: OB-fold	H: Nucleic acid-binding proteins (From Topology)	T: Nucleic acid-binding proteins	F: POT1	ECOD (1.6)
D [auth B]	SoSSB_OBF_like	e1k8gB2	A: beta barrels	X: OB-fold	H: Nucleic acid-binding proteins (From Topology)	T: Nucleic acid-binding proteins	F: SoSSB_OBF_like	ECOD (1.6)
D [auth B]	POT1	e1k8gB1	A: beta barrels	X: OB-fold	H: Nucleic acid-binding proteins (From Topology)	T: Nucleic acid-binding proteins	F: POT1	ECOD (1.6)
E [auth C]	SoSSB_OBF_like	e1k8gC2	A: beta barrels	X: OB-fold	H: Nucleic acid-binding proteins (From Topology)	T: Nucleic acid-binding proteins	F: SoSSB_OBF_like	ECOD (1.6)
E [auth C]	POT1	e1k8gC1	A: beta barrels	X: OB-fold	H: Nucleic acid-binding proteins (From Topology)	T: Nucleic acid-binding proteins	F: POT1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C [auth A]	2.40.50.140	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)	Nucleic acid-binding proteins	CATH (4.3.0)
D [auth B]	2.40.50.140	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)	Nucleic acid-binding proteins	CATH (4.3.0)
E [auth C]	2.40.50.140	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)	Nucleic acid-binding proteins	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C [auth A], D [auth B], E [auth C]	PF02765	Telomeric single stranded DNA binding POT1/CDC13 (POT1)	Telomeric single stranded DNA binding POT1/CDC13	This domain binds single stranded telomeric DNA and adopts an OB fold [1]. It includes the proteins POT1 and CDC13 which have been shown to regulate telomere length, replication and capping [2-4]. POT1 is one component of the shelterin complex that ...	This domain binds single stranded telomeric DNA and adopts an OB fold [1]. It includes the proteins POT1 and CDC13 which have been shown to regulate telomere length, replication and capping [2-4]. POT1 is one component of the shelterin complex that protects telomere-ends from attack by DNA-repair mechanisms [5,6].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth D], B [auth E]	5'-D(TPTPGPGPGP*G)-3'	-	-	-
C [auth A], D [auth B], E [auth C]	Telomere-Binding Protein alpha Subunit	sequence-specific DNA binding DNA binding binding organic cyclic compound binding sequence-specific single stranded DNA binding single-stranded telomeric DNA binding single-stranded DNA binding nucleic acid binding telomeric DNA binding	telomere organization chromosome organization primary metabolic process DNA metabolic process nucleic acid metabolic process telomere maintenance cellular component organization nucleobase-containing compound metabolic process organic cyclic compound metabolic process organelle organization organic substance metabolic process telomere capping cellular process metabolic process telomere organization chromosome organization primary metabolic process DNA metabolic process nucleic acid metabolic process telomere maintenance cellular component organization nucleobase-containing compound metabolic process organic cyclic compound metabolic process organelle organization organic substance metabolic process telomere capping cellular process metabolic process cellular component organization or biogenesis macromolecule metabolic process	protein-containing complex membrane-bounded organelle intracellular organelle intracellular anatomical structure organelle nucleus intracellular membrane-bounded organelle cellular anatomical entity protein-DNA complex chromosome chromosomal region telomere cap complex intracellular non-membrane-bounded organelle chromosome, telomeric repeat region protein-containing complex membrane-bounded organelle intracellular organelle intracellular anatomical structure organelle nucleus intracellular membrane-bounded organelle cellular anatomical entity protein-DNA complex chromosome chromosomal region telomere cap complex intracellular non-membrane-bounded organelle chromosome, telomeric repeat region chromosome, telomeric region non-membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C [auth A], D [auth B], E [auth C]	IPR028389	Protection of telomeres protein 1	Family
C [auth A], D [auth B], E [auth C]	IPR012340	Nucleic acid-binding, OB-fold	Homologous Superfamily
C [auth A], D [auth B], E [auth C]	IPR011564	Telomeric single stranded DNA binding POT1/Cdc13	Domain
C [auth A], D [auth B], E [auth C]	IPR003415	Telomere-binding protein, alpha subunit, Spirotrichea	Family

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.