2I0Q

Crystal structure of a telomere single-strand DNA-protein complex from O. nova with full-length alpha and beta telomere proteins

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)
B [auth A]	d2i0qa1	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)
C [auth B]	d2i0qb1	All beta proteins	OB-fold	Nucleic acid-binding proteins	Single strand DNA-binding domain, SSB	Core domain of telomere end binding protein beta 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)
B [auth A]	SCOP2B Superfamily	Nucleic acid-binding proteins	8034298	3000135	SCOP2B (2022-06-29)
B [auth A]	SCOP2B Superfamily	Nucleic acid-binding proteins	8034296	3000135	SCOP2B (2022-06-29)
B [auth A]	SCOP2B Superfamily	Nucleic acid-binding proteins	8034300	3000135	SCOP2B (2022-06-29)
C [auth B]	SCOP2B Superfamily	Nucleic acid-binding proteins	8034301	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)
B [auth A]	POT1_1	e2i0qA3	A: beta barrels	X: OB-fold	H: Nucleic acid-binding proteins (From Topology)	T: Nucleic acid-binding proteins	F: POT1_1	ECOD (1.6)
B [auth A]	SoSSB_OBF_like	e2i0qA2	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)
B [auth A]	POT1	e2i0qA1	A: beta barrels	X: OB-fold	H: Nucleic acid-binding proteins (From Topology)	T: Nucleic acid-binding proteins	F: POT1	ECOD (1.6)
C [auth B]	TEBP_beta	e2i0qB1	A: beta barrels	X: OB-fold	H: Nucleic acid-binding proteins (From Topology)	T: Nucleic acid-binding proteins	F: TEBP_beta	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B [auth A]	2.40.50.140	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)	Nucleic acid-binding proteins	CATH (4.3.0)
C [auth B]	2.40.200.10	Mainly Beta	Beta Barrel	Telomere-binding Protein Beta Subunit	Chain B	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B [auth A]	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
C [auth B]	PF07404	Telomere-binding protein beta subunit (TEBP beta) (TEBP_beta)	Telomere-binding protein beta subunit (TEBP beta)	This domain represents the OB fold from several telomere-binding protein beta subunits which appear to be specific to the family Oxytrichidae. Telomeres are specialised protein-DNA complexes that compose the ends of eukaryotic chromosomes. Telomeres ...	This domain represents the OB fold from several telomere-binding protein beta subunits which appear to be specific to the family Oxytrichidae. Telomeres are specialised protein-DNA complexes that compose the ends of eukaryotic chromosomes. Telomeres protect chromosome termini from degradation and recombination and act together with telomerase to ensure complete genome replication. TEBP beta forms a complex with TEBP alpha and this complex is able to recognise and bind ssDNA to form a sequence-specific, telomeric nucleoprotein complex that caps the very 3' ends of chromosomes [1, 2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth D]	5'-D(GPGPGPTPTPTPTPGPGPGP*G)-3'	-	-	-
B [auth A]	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	cellular metabolic process telomere organization chromosome organization cellular nitrogen compound metabolic process 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 heterocycle metabolic process telomere capping cellular metabolic process telomere organization chromosome organization cellular nitrogen compound metabolic process 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 heterocycle metabolic process telomere capping nitrogen compound metabolic process cellular process metabolic process cellular component organization or biogenesis macromolecule metabolic process cellular aromatic compound 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
C [auth B]	Telomere-binding protein beta 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	cellular metabolic process telomere organization chromosome organization cellular nitrogen compound metabolic process 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 heterocycle metabolic process telomere capping cellular metabolic process telomere organization chromosome organization cellular nitrogen compound metabolic process 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 heterocycle metabolic process telomere capping nitrogen compound metabolic process cellular process metabolic process cellular component organization or biogenesis macromolecule metabolic process cellular aromatic compound 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
B [auth A]	IPR028389	Protection of telomeres protein 1	Family
B [auth A]	IPR012340	Nucleic acid-binding, OB-fold	Homologous Superfamily
B [auth A]	IPR011564	Telomeric single stranded DNA binding POT1/Cdc13	Domain
B [auth A]	IPR003415	Telomere-binding protein, alpha subunit, Spirotrichea	Family
C [auth B]	IPR023113	Telomere-binding protein, beta subunit domain superfamily	Homologous Superfamily
C [auth B]	IPR012340	Nucleic acid-binding, OB-fold	Homologous Superfamily
C [auth B]	IPR010874	Telomere-binding protein subunit beta	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.