Annotations: 7F4E

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	DHS-like NAD/FAD-binding domain	8039531	3001728	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	I-set	e7f4eA1	A: a/b three-layered sandwiches	X: RNase A-like	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: I-set	ECOD (v294.1)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF02146	Sir2 family (SIR2)	Sir2 family	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B [auth C]	Histone H3	DNA binding binding nucleic acid binding protein heterodimerization activity protein binding protein dimerization activity structural molecule activity structural constituent of chromatin oxidoreductase activity, acting on metal ions oxidoreductase activity oxidoreductase activity, acting on metal ions, NAD or NADP as acceptor cupric reductase (NADH) activity catalytic activity	nucleolar large rRNA transcription by RNA polymerase I RNA metabolic process primary metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process biosynthetic process transcription by RNA polymerase I rRNA transcription nucleolar large rRNA transcription by RNA polymerase I RNA metabolic process primary metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process biosynthetic process transcription by RNA polymerase I rRNA transcription metabolic process cellular process macromolecule metabolic process rRNA metabolic process regulation of cellular process regulation of primary metabolic process regulation of RNA metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of biological process biological regulation regulation of macromolecule metabolic process regulation of gene expression regulation of macromolecule biosynthetic process regulation of DNA-templated transcription regulation of metabolic process inorganic ion homeostasis homeostatic process intracellular copper ion homeostasis copper ion homeostasis cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis aerobic respiration cellular respiration energy derivation by oxidation of organic compounds generation of precursor metabolites and energy positive regulation of DNA-templated transcription positive regulation of biological process positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of biosynthetic process positive regulation of macromolecule metabolic process positive regulation of transcription by RNA polymerase I positive regulation of cellular process regulation of transcription by RNA polymerase I positive regulation of RNA metabolic process positive regulation of RNA biosynthetic process developmental process sexual sporulation resulting in formation of a cellular spore sexual reproduction reproductive process meiotic cell cycle developmental process involved in reproduction sporulation resulting in formation of a cellular spore anatomical structure morphogenesis sexual sporulation anatomical structure formation involved in morphogenesis anatomical structure development sporulation cell cycle cellular response to stimulus global genome nucleotide-excision repair response to stimulus DNA metabolic process cellular response to stress nucleotide-excision repair DNA damage response response to stress DNA repair cellular component organization chromatin organization cellular component organization or biogenesis	membrane-bounded organelle protein-containing complex intracellular anatomical structure nucleus membrane-enclosed lumen nuclear protein-containing complex intracellular membraneless organelle transcription regulator complex intracellular membrane-bounded organelle nucleolus intracellular organelle lumen intracellular organelle cellular anatomical structure RNA polymerase I upstream activating factor complex membrane-bounded organelle protein-containing complex intracellular anatomical structure nucleus membrane-enclosed lumen nuclear protein-containing complex intracellular membraneless organelle transcription regulator complex intracellular membrane-bounded organelle nucleolus intracellular organelle lumen intracellular organelle cellular anatomical structure RNA polymerase I upstream activating factor complex RNA polymerase I transcription regulator complex organelle lumen organelle membraneless organelle nuclear lumen CENP-A containing chromatin protein-DNA complex nucleosome chromosome chromatin chromosomal region chromosome, centromeric core domain CENP-A containing nucleosome chromosome, centromeric region
A	NAD-dependent protein deacetylase HST2	NAD+ binding NAD binding binding nucleotide binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding heterocyclic compound binding small molecule binding deacetylase activity protein lysine deacetylase activity catalytic activity, acting on a protein NAD+ binding NAD binding binding nucleotide binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding heterocyclic compound binding small molecule binding deacetylase activity protein lysine deacetylase activity catalytic activity, acting on a protein acyltransferase activity histone deacetylase activity, NAD-dependent deacylase activity transferase activity NAD-dependent protein lysine deacylase activity histone deacetylase activity NAD-dependent protein lysine deacetylase activity histone modifying activity acyltransferase activity, transferring groups other than amino-acyl groups catalytic activity histone H4K16 deacetylase activity, NAD-dependent histone H4K deacetylase activity cation binding metal ion binding	regulation of DNA recombination regulation of cellular process negative regulation of biological process regulation of mitotic recombination regulation of primary metabolic process nucleobase-containing compound metabolic process negative regulation of cellular process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process negative regulation of macromolecule metabolic process negative regulation of mitotic recombination regulation of biological process DNA recombination negative regulation of metabolic process regulation of DNA recombination regulation of cellular process negative regulation of biological process regulation of mitotic recombination regulation of primary metabolic process nucleobase-containing compound metabolic process negative regulation of cellular process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process negative regulation of macromolecule metabolic process negative regulation of mitotic recombination regulation of biological process DNA recombination negative regulation of metabolic process biological regulation mitotic recombination primary metabolic process DNA metabolic process regulation of macromolecule metabolic process nucleic acid metabolic process negative regulation of DNA recombination metabolic process cellular process negative regulation of DNA metabolic process macromolecule metabolic process regulation of metabolic process regulation of DNA metabolic process nucleolar chromatin organization cellular component organization cellular component biogenesis cellular component assembly chromatin organization chromatin remodeling cellular component organization or biogenesis rDNA heterochromatin formation regulation of biosynthetic process heterochromatin formation epigenetic regulation of gene expression heterochromatin organization gene expression macromolecule biosynthetic process regulation of gene expression negative regulation of gene expression nucleus organization organelle organization biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process nucleolus organization facultative heterochromatin formation negative regulation of gene expression, epigenetic regulation of macromolecule biosynthetic process	cellular anatomical structure intracellular anatomical structure cytoplasm membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B [auth C]	IPR009072	Histone-fold	Homologous Superfamily
B [auth C]	IPR007125	Core Histone H2A/H2B/H3 domain	Domain
B [auth C]	IPR000164	Histone H3/CENP-A	Family
A	IPR026590	Sirtuin family, catalytic core domain	Domain
A	IPR050134	NAD-dependent sirtuin protein deacylases	Family
A	IPR017328	Sirtuin, class I	Family
A	IPR026591	Sirtuin, catalytic core small domain superfamily	Homologous Superfamily
A	IPR003000	Sirtuin family	Family
A	IPR029035	DHS-like NAD/FAD-binding 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 R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.