1ZBX | pdb_00001zbx

Crystal structure of a Orc1p-Sir1p complex

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-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d1zbxb1	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)
B	d1zbxb2	Artifacts	Tags	Tags	Tags	C-terminal Tags	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
A	d1zbxa1	All beta proteins	SH3-like barrel	BAH domain	BAH domain	Origin-recognition complex protein 120kDa subunit, Orc1p	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	SCOP2 Family	ORC1-binding domain	8023171	4000419	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	ORC1-binding domain	8035551	3000250	SCOP2 (2022-06-29)
A	SCOP2B Superfamily	BAH domain	8043289	3001462	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	Sir1	e1zbxB1	A: a+b complex topology	X: ORC1-binding domain (From Topology)	H: ORC1-binding domain (From Topology)	T: ORC1-binding domain	F: Sir1	ECOD (1.6)
A	BAH	e1zbxA1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: BAH	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.30.30.490	Mainly Beta	Roll	SH3 type barrels.	Bromo adjacent homology (BAH) domain	CATH (4.2.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
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
A	PF01426	BAH domain (BAH)	BAH domain	This domain has been called BAH (Bromo adjacent homology) domain and has also been called ELM1 and BAM (Bromo adjacent motif) domain. The function of this domain is unknown but may be involved in protein-protein interaction [3].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B	Regulatory protein SIR1	-	regulation of cellular process negative regulation of biological process cellular component organization cellular component biogenesis cellular component assembly chromatin organization 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 epigenetic regulation of gene expression regulation of cellular process negative regulation of biological process cellular component organization cellular component biogenesis cellular component assembly chromatin organization 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 epigenetic regulation of gene expression negative regulation of metabolic process biological regulation heterochromatin organization regulation of macromolecule metabolic process gene expression macromolecule 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 cellular process negative regulation of gene expression, epigenetic regulation of macromolecule biosynthetic process metabolic process macromolecule metabolic process regulation of metabolic process	membrane-bounded organelle intracellular organelle protein-containing complex cellular anatomical structure intracellular anatomical structure organelle chromatin silencing complex nucleus nuclear protein-containing complex intracellular membrane-bounded organelle membraneless organelle chromosome, centromeric region intracellular membraneless organelle chromosome membrane-bounded organelle intracellular organelle protein-containing complex cellular anatomical structure intracellular anatomical structure organelle chromatin silencing complex nucleus nuclear protein-containing complex intracellular membrane-bounded organelle membraneless organelle chromosome, centromeric region intracellular membraneless organelle chromosome chromosomal region
A	Origin recognition complex subunit 1	DNA binding sequence-specific DNA binding sequence-specific double-stranded DNA binding double-stranded DNA binding binding nucleic acid binding DNA replication origin binding chromatin binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding DNA binding sequence-specific DNA binding sequence-specific double-stranded DNA binding double-stranded DNA binding binding nucleic acid binding DNA replication origin binding chromatin binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding pyrophosphatase activity ATP hydrolysis activity ribonucleoside triphosphate phosphatase activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity hydrolase activity, acting on acid anhydrides catalytic activity ATP-dependent activity cation binding metal ion binding protein-containing complex binding nucleosome binding	cellular response to stimulus regulation of cellular process regulation of cell cycle phase transition response to stimulus signaling G2/M transition of mitotic cell cycle negative regulation of biological process negative regulation of cell cycle cell cycle phase transition intracellular signal transduction mitotic cell cycle negative regulation of mitotic cell cycle cell communication mitotic G2/M transition checkpoint regulation of mitotic cell cycle cellular response to stimulus regulation of cellular process regulation of cell cycle phase transition response to stimulus signaling G2/M transition of mitotic cell cycle negative regulation of biological process negative regulation of cell cycle cell cycle phase transition intracellular signal transduction mitotic cell cycle negative regulation of mitotic cell cycle cell communication mitotic G2/M transition checkpoint regulation of mitotic cell cycle mitotic DNA integrity checkpoint signaling negative regulation of cellular process negative regulation of cell cycle phase transition signal transduction cell cycle DNA replication checkpoint signaling regulation of cell cycle cell cycle process cell cycle G2/M phase transition regulation of biological process mitotic DNA replication checkpoint signaling negative regulation of mitotic cell cycle phase transition regulation of G2/M transition of mitotic cell cycle regulation of cell cycle process biological regulation DNA integrity checkpoint signaling regulation of cell cycle G2/M phase transition negative regulation of cell cycle process cell cycle checkpoint signaling regulation of mitotic cell cycle phase transition mitotic cell cycle checkpoint signaling mitotic cell cycle process negative regulation of cell cycle G2/M phase transition cellular process negative regulation of G2/M transition of mitotic cell cycle mitotic cell cycle phase transition nucleobase-containing compound metabolic process DNA-templated DNA replication DNA replication DNA replication initiation metabolic process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process chromosome organization maintenance of DNA repeat elements cellular component organization maintenance of rDNA organelle organization cellular component organization or biogenesis pre-replicative complex assembly nuclear DNA replication cell cycle DNA replication cellular component biogenesis protein-DNA complex organization cellular component assembly protein-containing complex assembly pre-replicative complex assembly involved in nuclear cell cycle DNA replication protein-containing complex organization pre-replicative complex assembly involved in cell cycle DNA replication protein-DNA complex assembly chromatin organization chromatin remodeling negative regulation of macromolecule metabolic process regulation of biosynthetic process heterochromatin formation epigenetic regulation of gene expression negative regulation of metabolic process heterochromatin organization regulation of macromolecule metabolic process gene expression macromolecule 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 regulation of metabolic process nucleosome organization	membrane-bounded organelle DNA replication preinitiation complex protein-containing complex intracellular anatomical structure protein-DNA complex nucleus membrane-enclosed lumen nuclear protein-containing complex intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle cellular anatomical structure nucleoplasm organelle lumen membrane-bounded organelle DNA replication preinitiation complex protein-containing complex intracellular anatomical structure protein-DNA complex nucleus membrane-enclosed lumen nuclear protein-containing complex intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle cellular anatomical structure nucleoplasm organelle lumen organelle nuclear lumen pre-replicative complex nuclear pre-replicative complex nuclear origin of replication recognition complex intracellular membraneless organelle nuclear chromosome chromosome origin recognition complex membraneless organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B	IPR021646	Sir1, ORC-binding domain	Domain
B	IPR037240	ORC1-binding domain	Homologous Superfamily
A	IPR041083	AAA lid domain	Domain
A	IPR001025	Bromo adjacent homology (BAH) domain	Domain
A	IPR003593	AAA+ ATPase domain	Domain
A	IPR003959	ATPase, AAA-type, core	Domain
A	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
A	IPR043151	Bromo adjacent homology (BAH) domain superfamily	Homologous Superfamily
A	IPR048867	Origin recognition complex subunit 1, C-terminal domain	Domain
A	IPR050311	Origin recognition complex 1/Cell division control protein 6	Family

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.