1Z1A

S. cerevisiae Sir1 ORC-interaction domain

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

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d1z1ab_	Alpha and beta proteins (a+b)	ORC1-binding domain	ORC1-binding domain	ORC1-binding domain	Regulatory protein SIR1	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
A	d1z1aa1	Alpha and beta proteins (a+b)	ORC1-binding domain	ORC1-binding domain	ORC1-binding domain	Regulatory protein SIR1	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	ORC1-binding domain	8035551	3000250	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	ORC1-binding domain	8035551	3000250	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	PF11603	e1z1aB1	A: a+b complex topology	X: ORC1-binding domain (From Topology)	H: ORC1-binding domain (From Topology)	T: ORC1-binding domain	F: PF11603	ECOD (1.6)
A	PF11603	e1z1aA1	A: a+b complex topology	X: ORC1-binding domain (From Topology)	H: ORC1-binding domain (From Topology)	T: ORC1-binding domain	F: PF11603	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF11603	Sir1, ORC-binding domain (Sir1)	Sir1, ORC-binding domain	This entry represents the ORC-binding domain of Sir1. Sir1 interacts with the BAH domain of the Orc1 subunit of the origin recognition complex (ORC) resulting in the establishment of silent chromatin at HMR and HML in S.cerevisiae [1]. The amino acid ...	This entry represents the ORC-binding domain of Sir1. Sir1 interacts with the BAH domain of the Orc1 subunit of the origin recognition complex (ORC) resulting in the establishment of silent chromatin at HMR and HML in S.cerevisiae [1]. The amino acids from the ORC interaction region of Sir1 are presented on a conserved, convex surface that forms a complementary interface with the Orc1 BAH domain, critical for transcriptional silencing [1]. Proteins containing this domain also include Y' element ATP-dependent helicase protein 1, which catalyses DNA unwinding and is involved in telomerase-independent telomere maintenance [2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Regulatory protein SIR1	protein-containing complex binding chromatin binding binding	regulation of cellular process cellular biosynthetic process negative regulation of biological process negative regulation of cellular metabolic process protein-DNA complex organization cellular component organization organic substance metabolic process chromatin organization organic substance biosynthetic process negative regulation of cellular process chromatin remodeling cellular component organization or biogenesis negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of cellular process cellular biosynthetic process negative regulation of biological process negative regulation of cellular metabolic process protein-DNA complex organization cellular component organization organic substance metabolic process chromatin organization organic substance biosynthetic process negative regulation of cellular process chromatin remodeling cellular component organization or biogenesis negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of biological process heterochromatin formation protein-containing complex organization epigenetic regulation of gene expression cellular metabolic process negative regulation of metabolic process biological regulation regulation of cellular metabolic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process negative regulation of cellular biosynthetic process regulation of cellular biosynthetic process regulation of gene expression negative regulation of gene expression constitutive heterochromatin formation biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process silent mating-type cassette heterochromatin formation negative regulation of gene expression, epigenetic regulation of macromolecule biosynthetic process metabolic process cellular process macromolecule metabolic process regulation of metabolic process	membrane-bounded organelle intracellular organelle protein-containing complex intracellular anatomical structure organelle chromatin silencing complex nucleus nuclear protein-containing complex intracellular membrane-bounded organelle cellular anatomical entity intracellular non-membrane-bounded organelle chromosome, centromeric region chromosome chromosomal region membrane-bounded organelle intracellular organelle protein-containing complex intracellular anatomical structure organelle chromatin silencing complex nucleus nuclear protein-containing complex intracellular membrane-bounded organelle cellular anatomical entity intracellular non-membrane-bounded organelle chromosome, centromeric region chromosome chromosomal region non-membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR021646	Sir1, ORC-binding domain	Domain
A, B	IPR037240	ORC1-binding domain	Homologous Superfamily

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 R01GM133198.