Annotations: 3HTK

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C	PF22326	e3htkC2	A: alpha bundles	X: Long alpha-hairpin	H: Endosomal sorting complex assembly domains (From Topology)	T: Endosomal sorting complex assembly domains	F: PF22326	ECOD (1.6)
C	PF11789	e3htkC1	A: few secondary structure elements	X: RING/U-box-like	H: RING/U-box-like	T: RING/U-box	F: PF11789	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.5.170	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces		CATH (4.3.0)
B	1.20.5.110	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces		CATH (4.3.0)
C	1.20.120.1010	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)		CATH (4.3.0)
C	3.30.40.10	Alpha Beta	2-Layer Sandwich	Herpes Virus-1	Zinc/RING finger domain, C3HC4 (zinc finger)	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF02463	RecF/RecN/SMC N terminal domain (SMC_N)	RecF/RecN/SMC N terminal domain	This domain is found at the N terminus of SMC proteins. The SMC (structural maintenance of chromosomes) superfamily proteins have ATP-binding domains at the N- and C-termini, and two extended coiled-coil domains separated by a hinge in the middle. T ...	This domain is found at the N terminus of SMC proteins. The SMC (structural maintenance of chromosomes) superfamily proteins have ATP-binding domains at the N- and C-termini, and two extended coiled-coil domains separated by a hinge in the middle. The eukaryotic SMC proteins form two kind of heterodimers: the SMC1/SMC3 and the SMC2/SMC4 types. These heterodimers constitute an essential part of higher order complexes, which are involved in chromatin and DNA dynamics [1]. This family also includes the RecF and RecN proteins that are involved in DNA metabolism and recombination.	Domain
B	PF02463	RecF/RecN/SMC N terminal domain (SMC_N)	RecF/RecN/SMC N terminal domain	This domain is found at the N terminus of SMC proteins. The SMC (structural maintenance of chromosomes) superfamily proteins have ATP-binding domains at the N- and C-termini, and two extended coiled-coil domains separated by a hinge in the middle. T ...	This domain is found at the N terminus of SMC proteins. The SMC (structural maintenance of chromosomes) superfamily proteins have ATP-binding domains at the N- and C-termini, and two extended coiled-coil domains separated by a hinge in the middle. The eukaryotic SMC proteins form two kind of heterodimers: the SMC1/SMC3 and the SMC2/SMC4 types. These heterodimers constitute an essential part of higher order complexes, which are involved in chromatin and DNA dynamics [1]. This family also includes the RecF and RecN proteins that are involved in DNA metabolism and recombination.	Domain
C	PF11789	Zinc-finger of the MIZ type in Nse subunit (zf-Nse)	Zinc-finger of the MIZ type in Nse subunit	Nse1 and Nse2 are novel non-SMC subunits of the fission yeast Smc5-6 DNA repair complex. This family is the zinc-finger domain similar to the MIZ type of zinc-finger [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Structural maintenance of chromosomes protein 5	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound 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 DNA binding damaged DNA binding nucleic acid binding single-stranded DNA binding	nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process resolution of DNA recombination intermediates DNA recombination metabolic process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process protein-DNA complex organization cellular component organization chromatin looping protein-containing complex organization nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process resolution of DNA recombination intermediates DNA recombination metabolic process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process protein-DNA complex organization cellular component organization chromatin looping protein-containing complex organization chromatin organization cellular process cellular component organization or biogenesis chromosome separation cell cycle chromosome segregation cell cycle process cellular response to stimulus double-strand break repair response to stimulus cellular response to stress DNA damage response response to stress recombinational repair double-strand break repair via homologous recombination DNA repair organonitrogen compound metabolic process peptidyl-lysine modification protein sumoylation macromolecule modification peptidyl-amino acid modification protein metabolic process protein modification process post-translational protein modification protein modification by small protein conjugation protein modification by small protein conjugation or removal regulation of telomere maintenance regulation of cellular component organization regulation of cellular process telomere organization regulation of primary metabolic process regulation of nucleobase-containing compound metabolic process regulation of biological process biological regulation chromosome organization regulation of chromosome organization regulation of macromolecule metabolic process regulation of organelle organization telomere maintenance organelle organization regulation of metabolic process regulation of DNA metabolic process	intracellular organelle intracellular anatomical structure organelle intracellular non-membrane-bounded organelle chromosome chromosome, telomeric region cellular anatomical entity chromosomal region non-membrane-bounded organelle protein-containing complex catalytic complex SUMO ligase complex transferase complex Smc5-Smc6 complex intracellular organelle intracellular anatomical structure organelle intracellular non-membrane-bounded organelle chromosome chromosome, telomeric region cellular anatomical entity chromosomal region non-membrane-bounded organelle protein-containing complex catalytic complex SUMO ligase complex transferase complex Smc5-Smc6 complex condensed chromosome membrane-bounded organelle nucleus intracellular membrane-bounded organelle
B	Structural maintenance of chromosomes protein 5	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound 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 DNA binding damaged DNA binding nucleic acid binding single-stranded DNA binding	nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process resolution of DNA recombination intermediates DNA recombination metabolic process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process protein-DNA complex organization cellular component organization chromatin looping protein-containing complex organization nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process resolution of DNA recombination intermediates DNA recombination metabolic process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process protein-DNA complex organization cellular component organization chromatin looping protein-containing complex organization chromatin organization cellular process cellular component organization or biogenesis chromosome separation cell cycle chromosome segregation cell cycle process cellular response to stimulus double-strand break repair response to stimulus cellular response to stress DNA damage response response to stress recombinational repair double-strand break repair via homologous recombination DNA repair organonitrogen compound metabolic process peptidyl-lysine modification protein sumoylation macromolecule modification peptidyl-amino acid modification protein metabolic process protein modification process post-translational protein modification protein modification by small protein conjugation protein modification by small protein conjugation or removal regulation of telomere maintenance regulation of cellular component organization regulation of cellular process telomere organization regulation of primary metabolic process regulation of nucleobase-containing compound metabolic process regulation of biological process biological regulation chromosome organization regulation of chromosome organization regulation of macromolecule metabolic process regulation of organelle organization telomere maintenance organelle organization regulation of metabolic process regulation of DNA metabolic process	intracellular organelle intracellular anatomical structure organelle intracellular non-membrane-bounded organelle chromosome chromosome, telomeric region cellular anatomical entity chromosomal region non-membrane-bounded organelle protein-containing complex catalytic complex SUMO ligase complex transferase complex Smc5-Smc6 complex intracellular organelle intracellular anatomical structure organelle intracellular non-membrane-bounded organelle chromosome chromosome, telomeric region cellular anatomical entity chromosomal region non-membrane-bounded organelle protein-containing complex catalytic complex SUMO ligase complex transferase complex Smc5-Smc6 complex condensed chromosome membrane-bounded organelle nucleus intracellular membrane-bounded organelle
C	E3 SUMO-protein ligase MMS21	aminoacyltransferase activity ubiquitin-like protein transferase activity catalytic activity, acting on a protein acyltransferase activity SUMO transferase activity transferase activity catalytic activity SUMO ligase activity ubiquitin-like protein ligase activity enzyme regulator activity protein kinase inhibitor activity molecular function inhibitor activity molecular function regulator activity enzyme inhibitor activity aminoacyltransferase activity ubiquitin-like protein transferase activity catalytic activity, acting on a protein acyltransferase activity SUMO transferase activity transferase activity catalytic activity SUMO ligase activity ubiquitin-like protein ligase activity enzyme regulator activity protein kinase inhibitor activity molecular function inhibitor activity molecular function regulator activity enzyme inhibitor activity protein kinase regulator activity protein serine/threonine kinase inhibitor activity kinase inhibitor activity kinase regulator activity cation binding transition metal ion binding zinc ion binding ion binding binding metal ion binding small molecule binding	localization DNA double-strand break attachment to nuclear envelope chromosome localization organelle localization chromosome attachment to the nuclear envelope cellular process cell cycle cell cycle process protein-DNA complex organization cellular component organization chromatin looping protein-containing complex organization chromatin organization cellular component organization or biogenesis localization DNA double-strand break attachment to nuclear envelope chromosome localization organelle localization chromosome attachment to the nuclear envelope cellular process cell cycle cell cycle process protein-DNA complex organization cellular component organization chromatin looping protein-containing complex organization chromatin organization cellular component organization or biogenesis cellular response to stimulus double-strand break repair response to stimulus DNA recombination primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process cellular response to stress DNA damage response response to stress recombinational repair metabolic process macromolecule metabolic process double-strand break repair via homologous recombination DNA repair organonitrogen compound metabolic process peptidyl-lysine modification protein sumoylation macromolecule modification peptidyl-amino acid modification protein metabolic process protein modification process post-translational protein modification protein modification by small protein conjugation protein modification by small protein conjugation or removal regulation of telomere maintenance regulation of cellular component organization regulation of cellular process telomere organization regulation of primary metabolic process regulation of nucleobase-containing compound metabolic process regulation of biological process biological regulation chromosome organization regulation of chromosome organization regulation of macromolecule metabolic process regulation of organelle organization telomere maintenance organelle organization regulation of metabolic process regulation of DNA metabolic process	membrane-bounded organelle intracellular organelle organelle envelope intracellular anatomical structure organelle nuclear envelope nucleus cellular anatomical entity intracellular membrane-bounded organelle endomembrane system cytoplasm intracellular non-membrane-bounded organelle chromosome chromosome, telomeric region membrane-bounded organelle intracellular organelle organelle envelope intracellular anatomical structure organelle nuclear envelope nucleus cellular anatomical entity intracellular membrane-bounded organelle endomembrane system cytoplasm intracellular non-membrane-bounded organelle chromosome chromosome, telomeric region chromosomal region non-membrane-bounded organelle protein-containing complex catalytic complex SUMO ligase complex transferase complex Smc5-Smc6 complex condensed chromosome

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR027131	Structural maintenance of chromosomes protein 5	Family
A	IPR003395	RecF/RecN/SMC, N-terminal	Domain
A	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
B	IPR027131	Structural maintenance of chromosomes protein 5	Family
B	IPR003395	RecF/RecN/SMC, N-terminal	Domain
B	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
C	IPR004181	Zinc finger, MIZ-type	Domain
C	IPR013083	Zinc finger, RING/FYVE/PHD-type	Homologous Superfamily
C	IPR026846	E3 SUMO-protein ligase Nse2 (Mms21)	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 R01GM133198.