Annotations: 3ZCO

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF22344	e3zcoA1	A: alpha arrays	X: HTH	H: HTH	T: winged	F: PF22344	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.10.2450	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF22344	Regulatory protein SIR3, C-terminal domain (SIR3_C)	Regulatory protein SIR3, C-terminal domain	This domain is found at the C-terminal end of Regulatory protein SIR3 from Saccharomyces cerevisiae and similar fungal proteins. SIR3 is essential for gene silencing. It is organised into a highly conserved N-terminal BAH domain (Pfam:PF01426), a C - ...	This domain is found at the C-terminal end of Regulatory protein SIR3 from Saccharomyces cerevisiae and similar fungal proteins. SIR3 is essential for gene silencing. It is organised into a highly conserved N-terminal BAH domain (Pfam:PF01426), a C -terminal AAA+ ATPase-like domain (Pfam:PF17872), plus an extreme C-terminal domain (this entry). This domain form a winged helix-turn-helix (HTH) variant with a strong homodimerisation function but without the ability to bind DNA [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	REGULATORY PROTEIN SIR3	DNA binding sequence-specific DNA binding sequence-specific double-stranded DNA binding double-stranded DNA binding binding organic cyclic compound binding nucleic acid binding DNA replication origin binding protein-containing complex binding chromatin binding identical protein binding protein binding nucleosome binding single-stranded DNA 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 catabolic process cellular biosynthetic process RNA metabolic process negative regulation of cellular metabolic process macromolecule catabolic process nucleobase-containing compound metabolic process RNA catabolic process negative regulation of macromolecule metabolic process regulation of biosynthetic process mRNA catabolic process nuclear-transcribed mRNA catabolic process cellular metabolic process negative regulation of metabolic process nuclear-transcribed mRNA catabolic process, non-stop decay regulation of cellular metabolic process primary metabolic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process mRNA metabolic process negative regulation of cellular biosynthetic process nucleic acid metabolic process nucleobase-containing compound catabolic process regulation of cellular biosynthetic process regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process nucleic acid catabolic process regulation of macromolecule biosynthetic process metabolic process macromolecule metabolic process regulation of metabolic process localization telomere localization telomere tethering at nuclear periphery chromosome localization organelle localization DNA-templated DNA replication DNA replication DNA replication initiation DNA metabolic process protein-DNA complex organization cellular component organization chromatin organization chromatin remodeling cellular component organization or biogenesis heterochromatin formation protein-containing complex organization epigenetic regulation of gene expression constitutive heterochromatin formation silent mating-type cassette heterochromatin formation negative regulation of gene expression, epigenetic cellular localization establishment of protein-containing complex localization to telomere cellular macromolecule localization macromolecule localization establishment of localization protein-containing complex localization subtelomeric heterochromatin formation telomere organization chromosome organization organelle organization double-strand break repair double-strand break repair via nonhomologous end joining cellular response to stress DNA damage response response to stress DNA repair	membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle nucleus membrane-enclosed lumen nucleolus intracellular organelle lumen organelle lumen intracellular non-membrane-bounded organelle membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle nucleus membrane-enclosed lumen nucleolus intracellular organelle lumen organelle lumen intracellular non-membrane-bounded organelle nuclear lumen non-membrane-bounded organelle protein-containing complex nuclear origin of replication recognition complex nuclear protein-containing complex nuclear chromosome chromosome origin recognition complex chromatin silencing complex protein-DNA complex chromatin heterochromatin chromosome, telomeric region chromosomal region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR041083	AAA lid domain	Domain
A	IPR001025	Bromo adjacent homology (BAH) domain	Domain
A	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
A	IPR043151	Bromo adjacent homology (BAH) domain superfamily	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.