Annotations: 3KJO

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Nucleic acid-binding proteins	8043959	3000135	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Nucleic acid-binding proteins	8043961	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)
A	POT1PC_1	e3kjoA2	A: beta barrels	X: OB-fold	H: Nucleic acid-binding proteins (From Topology)	T: Nucleic acid-binding proteins	F: POT1PC_1	ECOD (1.6)
A	POT1	e3kjoA1	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)
A	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
A	PF16686	ssDNA-binding domain of telomere protection protein (POT1PC)	ssDNA-binding domain of telomere protection protein	POT1PC is the ssDNA-binding domain on a family of fungal telomere protection protein 1 proteins. POT1PC is able to accommodate heterogeneous ssDNA ligands. Pot1 proteins are the proteins responsible for binding to and protecting the 3' single-stran ...	POT1PC is the ssDNA-binding domain on a family of fungal telomere protection protein 1 proteins. POT1PC is able to accommodate heterogeneous ssDNA ligands. Pot1 proteins are the proteins responsible for binding to and protecting the 3' single-stranded DNA (ssDNA) overhang at most eukaryotic telomeres [1].	Domain
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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Protection of telomeres protein 1	sequence-specific DNA binding DNA binding binding organic cyclic compound binding nucleic acid binding telomeric DNA binding G-rich strand telomeric DNA binding sequence-specific single stranded DNA binding single-stranded telomeric DNA binding single-stranded DNA binding oxidized DNA binding oxidized purine DNA binding damaged DNA binding 8-hydroxy-2'-deoxyguanosine DNA binding sequence-specific DNA binding DNA binding binding organic cyclic compound binding nucleic acid binding telomeric DNA binding G-rich strand telomeric DNA binding sequence-specific single stranded DNA binding single-stranded telomeric DNA binding single-stranded DNA binding oxidized DNA binding oxidized purine DNA binding damaged DNA binding 8-hydroxy-2'-deoxyguanosine DNA binding G-rich single-stranded DNA binding DNA secondary structure binding telomeric D-loop binding D-loop DNA binding protein binding enzyme binding DEAD/H-box RNA helicase binding enzyme regulator activity molecular function inhibitor activity molecular function regulator activity enzyme inhibitor activity telomerase inhibitor activity	cellular biosynthetic process telomere organization RNA-templated DNA biosynthetic process nucleobase-containing compound metabolic process telomere maintenance via telomere lengthening cellular component organization nucleic acid biosynthetic process cellular component organization or biogenesis telomere maintenance via telomerase cellular metabolic process chromosome organization primary metabolic process DNA metabolic process nucleobase-containing compound biosynthetic process cellular biosynthetic process telomere organization RNA-templated DNA biosynthetic process nucleobase-containing compound metabolic process telomere maintenance via telomere lengthening cellular component organization nucleic acid biosynthetic process cellular component organization or biogenesis telomere maintenance via telomerase cellular metabolic process chromosome organization primary metabolic process DNA metabolic process nucleobase-containing compound biosynthetic process macromolecule biosynthetic process nucleic acid metabolic process telomere maintenance organelle organization biosynthetic process metabolic process cellular process macromolecule metabolic process DNA biosynthetic process regulation of telomere maintenance regulation of cellular component organization regulation of cellular process regulation of DNA biosynthetic process regulation of primary metabolic process regulation of nucleobase-containing compound metabolic process regulation of biosynthetic process regulation of biological process biological regulation regulation of cellular metabolic process regulation of chromosome organization regulation of macromolecule metabolic process regulation of telomere maintenance via telomere lengthening regulation of organelle organization regulation of telomere maintenance via telomerase regulation of cellular biosynthetic process regulation of macromolecule biosynthetic process regulation of metabolic process regulation of DNA metabolic process cellular component biogenesis cellular component assembly telomere assembly telomeric loop disassembly telomeric D-loop disassembly DNA duplex unwinding DNA geometric change DNA conformation change negative regulation of telomere maintenance negative regulation of biological process negative regulation of telomere maintenance via telomerase negative regulation of cellular metabolic process negative regulation of chromosome organization negative regulation of nucleobase-containing compound metabolic process negative regulation of cellular component organization negative regulation of metabolic process negative regulation of cellular biosynthetic process negative regulation of macromolecule biosynthetic process negative regulation of DNA biosynthetic process negative regulation of telomere maintenance via telomere lengthening negative regulation of cellular process negative regulation of macromolecule metabolic process negative regulation of organelle organization negative regulation of biosynthetic process negative regulation of DNA metabolic process positive regulation of organelle organization regulation of ATP-dependent activity positive regulation of cellular component organization regulation of catalytic activity positive regulation of helicase activity positive regulation of ATP-dependent activity positive regulation of biological process positive regulation of molecular function positive regulation of DNA duplex unwinding positive regulation of cellular process positive regulation of catalytic activity regulation of DNA duplex unwinding positive regulation of chromosome organization positive regulation of DNA helicase activity regulation of helicase activity regulation of molecular function regulation of DNA helicase activity establishment of protein localization to telomere protein localization establishment of protein localization cellular localization protein localization to chromosome, telomeric region establishment of localization localization establishment of protein localization to organelle protein localization to chromosome cellular macromolecule localization macromolecule localization protein localization to organelle establishment of protein localization to chromosome positive regulation of DNA strand elongation positive regulation of nucleobase-containing compound metabolic process regulation of DNA strand elongation positive regulation of metabolic process DNA strand elongation positive regulation of DNA metabolic process positive regulation of macromolecule metabolic process cellular response to stimulus regulation of double-strand break repair response to stimulus regulation of cellular response to stress cellular response to stress response to stress regulation of response to stress regulation of double-strand break repair via nonhomologous end joining DNA repair double-strand break repair double-strand break repair via nonhomologous end joining regulation of DNA repair DNA damage response regulation of response to stimulus positive regulation of macromolecule biosynthetic process positive regulation of telomere maintenance via telomere lengthening positive regulation of telomere maintenance positive regulation of telomere maintenance via telomerase positive regulation of cellular metabolic process positive regulation of biosynthetic process positive regulation of DNA biosynthetic process positive regulation of cellular biosynthetic process telomere capping	membrane-bounded organelle protein-containing complex intracellular anatomical structure protein-DNA complex nucleus nuclear protein-containing complex chromosome cellular anatomical entity intracellular membrane-bounded organelle chromosomal region intracellular organelle organelle telomere cap complex intracellular non-membrane-bounded organelle membrane-bounded organelle protein-containing complex intracellular anatomical structure protein-DNA complex nucleus nuclear protein-containing complex chromosome cellular anatomical entity intracellular membrane-bounded organelle chromosomal region intracellular organelle organelle telomere cap complex intracellular non-membrane-bounded organelle chromosome, telomeric repeat region chromosome, telomeric region shelterin complex non-membrane-bounded organelle nuclear telomere cap complex membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen
B	DNA/RNA (5'-D(T)-R(PU)-D(PAPGPGPGPTPTPAPG)-3')	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR032042	Protection of telomeres protein 1, ssDNA-binding domain	Domain
A	IPR011564	Telomeric single stranded DNA binding POT1/Cdc13	Domain
A	IPR048953	Protection of telomeres protein 1, C-terminal insertion domain	Domain
A	IPR028389	Protection of telomeres protein 1	Family
A	IPR012340	Nucleic acid-binding, OB-fold	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: Q9NUX5	melanoma B-cell chronic lymphocytic leukemia melanoma, cutaneous malignant, susceptibility to, 10 lymphoid leukemia anaplastic oligodendroglioma Chromosome Aberrations familial melanoma mixed glioma skin cancer oligodendroglioma skin neoplasm cutaneous melanoma glioma susceptibility 9 malignant glioma ovarian cancer melanoma B-cell chronic lymphocytic leukemia melanoma, cutaneous malignant, susceptibility to, 10 lymphoid leukemia anaplastic oligodendroglioma Chromosome Aberrations familial melanoma mixed glioma skin cancer oligodendroglioma skin neoplasm cutaneous melanoma glioma susceptibility 9 malignant glioma ovarian cancer progressive supranuclear palsy lung cancer medulloblastoma Pick disease glioma lung carcinoma malignant ependymoma plasma cell myeloma chromosomal anomaly

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.