Annotations: 2HJH

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	8092981	3001728	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	DHS-like NAD/FAD-binding domain	8092981	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	DUF592,SIR2_1st	e2hjhA1	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: DHS-like NAD/FAD-binding domain	F: DUF592,SIR2_1st	ECOD (1.6)
A	SIR2_2nd	e2hjhA2	A: few secondary structure elements	X: Rubredoxin-like	H: Rubredoxin-related	T: Rubredoxin-related	F: SIR2_2nd	ECOD (1.6)
B	DUF592,SIR2_1st	e2hjhB1	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: DHS-like NAD/FAD-binding domain	F: DUF592,SIR2_1st	ECOD (1.6)
B	SIR2_2nd	e2hjhB2	A: few secondary structure elements	X: Rubredoxin-like	H: Rubredoxin-related	T: Rubredoxin-related	F: SIR2_2nd	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.1220	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	TPP-binding domain	CATH (4.3.0)
A	3.30.1600.10	Alpha Beta	2-Layer Sandwich	SIR2/SIRT2 'Small Domain'	SIR2/SIRT2 'Small Domain'	CATH (4.3.0)
B	3.40.50.1220	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	TPP-binding domain	CATH (4.3.0)
B	3.30.1600.10	Alpha Beta	2-Layer Sandwich	SIR2/SIRT2 'Small Domain'	SIR2/SIRT2 'Small Domain'	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	NAD-dependent histone deacetylase SIR2	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 deacetylase activity NAD-dependent histone deacetylase activity protein lysine deacetylase activity catalytic activity, acting on a protein hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in linear amides hydrolase activity 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 deacetylase activity NAD-dependent histone deacetylase activity protein lysine deacetylase activity catalytic activity, acting on a protein hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in linear amides hydrolase activity hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds histone deacetylase activity NAD-dependent histone H3K14 deacetylase activity histone H3K14 deacetylase activity histone H3K deacetylase activity histone modifying activity NAD-dependent protein lysine deacetylase activity catalytic activity NAD-dependent histone H3K9 deacetylase activity histone H3K9 deacetylase activity histone H4K deacetylase activity histone H4K16 deacetylase activity NAD-dependent histone H4K16 deacetylase activity transferase activity NAD+ binding NAD binding nucleotide binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding heterocyclic compound binding small molecule binding cation binding metal ion binding	localization telomere localization telomere tethering at nuclear periphery chromosome localization organelle localization developmental process regulation of biological process regulation of developmental process regulation of reproductive process reproductive process reproductive process in single-celled organism biological regulation regulation of mating type switching developmental process involved in reproduction localization telomere localization telomere tethering at nuclear periphery chromosome localization organelle localization developmental process regulation of biological process regulation of developmental process regulation of reproductive process reproductive process reproductive process in single-celled organism biological regulation regulation of mating type switching developmental process involved in reproduction mating type switching sex determination mating type determination regulation of cellular process cellular biosynthetic process negative regulation of biological process negative regulation of cellular metabolic process cellular component organization chromatin organization negative regulation of cellular process chromatin remodeling cellular component organization or biogenesis negative regulation of macromolecule metabolic process regulation of biosynthetic process heterochromatin formation epigenetic regulation of gene expression cellular metabolic process negative regulation of metabolic process 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 organelle organization chromosome organization sister chromatid cohesion cell cycle cell cycle process regulation of DNA recombination DNA recombination primary metabolic process DNA metabolic process nucleic acid metabolic process regulation of primary metabolic process negative regulation of DNA recombination nucleobase-containing compound metabolic process negative regulation of DNA metabolic process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process regulation of DNA metabolic process regulatory ncRNA-mediated gene silencing 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 regulation of DNA amplification regulation of DNA biosynthetic process nucleic acid biosynthetic process negative regulation of DNA amplification DNA amplification nucleobase-containing compound biosynthetic process DNA biosynthetic process negative regulation of DNA biosynthetic process regulation of biological quality regulation of DNA stability nucleolar chromatin organization rDNA heterochromatin formation nucleus organization nucleolus organization facultative heterochromatin formation negative regulation of DNA replication DNA replication regulation of DNA replication cellular response to stimulus double-strand break repair response to stimulus double-strand break repair via nonhomologous end joining cellular response to stress DNA damage response response to stress DNA repair	membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membrane-bounded organelle cellular anatomical entity nucleolus intracellular organelle lumen intracellular organelle organelle lumen organelle intracellular non-membrane-bounded organelle nuclear lumen non-membrane-bounded organelle membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membrane-bounded organelle cellular anatomical entity nucleolus intracellular organelle lumen intracellular organelle organelle lumen organelle intracellular non-membrane-bounded organelle nuclear lumen non-membrane-bounded organelle RENT complex protein-containing complex nuclear protein-containing complex chromatin silencing complex chromatin chromosome heterochromatin chromosome, telomeric region chromosomal region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR026590	Sirtuin family, catalytic core domain	Domain
A, B	IPR007654	NAD-dependent histone deacetylase Sir2, N-terminal	Domain
A, B	IPR003000	Sirtuin family	Family
A, B	IPR029035	DHS-like NAD/FAD-binding domain superfamily	Homologous Superfamily
A, B	IPR050134	NAD-dependent sirtuin protein deacylases	Family
A, B	IPR026591	Sirtuin, catalytic core small 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.