Annotations: 3T5X

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PCI	e3t5xA4	A: alpha arrays	X: HTH	H: HTH	T: winged	F: PCI	ECOD (1.6)
A	KOG2581	e3t5xA3	A: alpha superhelices	X: Repetitive alpha hairpins	H: ARM repeat (From Topology)	T: ARM repeat	F: KOG2581	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.10.10	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF01399	PCI domain (PCI)	PCI domain	This domain has also been called the PINT motif (Proteasome, Int-6, Nip-1 and TRIP-15) [1].	Domain
B	PF05160	DSS1/SEM1 family (DSS1_SEM1)	DSS1/SEM1 family	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	PCI domain-containing protein 2	DNA binding double-stranded DNA binding binding organic cyclic compound binding nucleic acid binding RNA binding	negative regulation of transcription initiation by RNA polymerase II regulation of cellular process negative regulation of biological process negative regulation of cellular metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription regulation of RNA metabolic process regulation of DNA-templated transcription initiation transcription by RNA polymerase II organic substance biosynthetic process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process negative regulation of transcription initiation by RNA polymerase II regulation of cellular process negative regulation of biological process negative regulation of cellular metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription regulation of RNA metabolic process regulation of DNA-templated transcription initiation transcription by RNA polymerase II organic substance biosynthetic process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process transcription initiation at RNA polymerase II promoter regulation of transcription by RNA polymerase II negative regulation of DNA-templated transcription regulation of biological process negative regulation of transcription by RNA polymerase II cellular metabolic process negative regulation of metabolic process primary metabolic process regulation of cellular metabolic process negative regulation of cellular biosynthetic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process negative regulation of macromolecule biosynthetic process organic cyclic compound biosynthetic process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process negative regulation of RNA metabolic process cellular biosynthetic process RNA metabolic process RNA biosynthetic process nucleic acid biosynthetic process organic substance metabolic process negative regulation of cellular process regulation of RNA biosynthetic process negative regulation of macromolecule metabolic process regulation of biosynthetic process biological regulation regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process DNA-templated transcription initiation regulation of cellular biosynthetic process negative regulation of biosynthetic process cellular process regulation of transcription initiation by RNA polymerase II negative regulation of DNA-templated transcription initiation developmental process negative regulation of hematopoietic progenitor cell differentiation regulation of developmental process cellular developmental process hemopoiesis negative regulation of developmental process cell development regulation of cell differentiation negative regulation of lymphoid progenitor cell differentiation regulation of lymphoid progenitor cell differentiation cell differentiation lymphoid progenitor cell differentiation anatomical structure development negative regulation of cell differentiation regulation of hematopoietic progenitor cell differentiation hematopoietic progenitor cell differentiation immune system development multicellular organism development multicellular organismal process spleen development immune system process animal organ development hematopoietic or lymphoid organ development system development cellular localization nitrogen compound transport nucleocytoplasmic transport transport nuclear transport mRNA transport localization mRNA export from nucleus establishment of localization in cell RNA localization nuclear export nucleobase-containing compound transport RNA transport organic substance transport nucleic acid transport poly(A)+ mRNA export from nucleus intracellular transport establishment of localization RNA export from nucleus establishment of RNA localization macromolecule localization protein-DNA complex organization cellular component organization protein-containing complex organization chromatin organization heterochromatin organization cellular component organization or biogenesis post-transcriptional regulation of gene expression regulation of biological quality RNA catabolic process mRNA catabolic process nucleobase-containing compound catabolic process negative regulation of gene expression nucleic acid catabolic process catabolic process macromolecule catabolic process regulation of mRNA catabolic process regulation of catabolic process mRNA metabolic process organic cyclic compound catabolic process regulation of mRNA stability regulation of RNA stability regulation of mRNA metabolic process organic substance catabolic process negative regulation of programmed cell death regulation of apoptotic process regulation of programmed cell death cell death negative regulation of apoptotic process apoptotic process programmed cell death cellular response to stimulus positive regulation of cell communication regulation of cell cycle phase transition positive regulation of signal transduction response to stimulus positive regulation of cell cycle checkpoint spindle checkpoint signaling negative regulation of cell cycle regulation of signal transduction regulation of mitotic nuclear division intracellular signal transduction negative regulation of mitotic cell cycle cell communication regulation of cell cycle checkpoint negative regulation of mitotic sister chromatid segregation negative regulation of chromosome organization negative regulation of cell cycle phase transition mitotic spindle checkpoint signaling signal transduction cell cycle mitotic sister chromatid separation chromosome segregation negative regulation of sister chromatid segregation mitotic spindle assembly checkpoint signaling negative regulation of cellular component organization regulation of cell cycle process regulation of spindle checkpoint sister chromatid segregation positive regulation of intracellular signal transduction regulation of chromosome organization regulation of organelle organization regulation of mitotic cell cycle phase transition regulation of mitotic sister chromatid segregation mitotic cell cycle process regulation of response to stimulus positive regulation of mitotic cell cycle spindle assembly checkpoint regulation of chromosome separation negative regulation of mitotic nuclear division regulation of chromosome segregation regulation of cellular component organization regulation of mitotic sister chromatid separation regulation of metaphase/anaphase transition of cell cycle regulation of mitotic spindle checkpoint signaling regulation of mitotic cell cycle spindle assembly checkpoint spindle assembly checkpoint signaling positive regulation of biological process cell cycle phase transition regulation of mitotic metaphase/anaphase transition mitotic cell cycle positive regulation of response to stimulus regulation of mitotic cell cycle regulation of intracellular signal transduction mitotic sister chromatid segregation positive regulation of cell cycle process negative regulation of mitotic metaphase/anaphase transition regulation of cell cycle negative regulation of chromosome separation positive regulation of cellular process cell cycle process positive regulation of spindle checkpoint mitotic nuclear division regulation of signaling negative regulation of mitotic cell cycle phase transition organelle fission chromosome organization negative regulation of cell cycle process positive regulation of cell cycle cell cycle checkpoint signaling mitotic cell cycle checkpoint signaling organelle organization nuclear division negative regulation of chromosome segregation chromosome separation negative regulation of organelle organization negative regulation of nuclear division regulation of sister chromatid segregation negative regulation of mitotic sister chromatid separation regulation of nuclear division negative regulation of metaphase/anaphase transition of cell cycle nuclear chromosome segregation metaphase/anaphase transition of mitotic cell cycle regulation of cell communication metaphase/anaphase transition of cell cycle mitotic cell cycle phase transition positive regulation of signaling positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of macromolecule metabolic process positive regulation of nucleobase-containing compound metabolic process positive regulation of RNA metabolic process positive regulation of DNA-templated transcription positive regulation of cellular metabolic process positive regulation of biosynthetic process positive regulation of RNA biosynthetic process positive regulation of cellular biosynthetic process protein localization establishment of protein localization protein transport cellular macromolecule localization transcription elongation by RNA polymerase II DNA-templated transcription elongation transcription-dependent tethering of RNA polymerase II gene DNA at nuclear periphery post-transcriptional tethering of RNA polymerase II gene DNA at nuclear periphery regulation of leukocyte differentiation regulation of leukocyte activation regulation of cell activation mononuclear cell differentiation positive regulation of B cell differentiation lymphocyte differentiation regulation of cell development positive regulation of developmental process positive regulation of cell activation positive regulation of leukocyte activation regulation of immune system process positive regulation of immune system process positive regulation of cell development positive regulation of multicellular organismal process leukocyte differentiation lymphocyte activation leukocyte activation positive regulation of lymphocyte activation regulation of B cell differentiation B cell differentiation positive regulation of hemopoiesis positive regulation of cell differentiation regulation of B cell activation regulation of multicellular organismal process regulation of lymphocyte differentiation regulation of multicellular organismal development B cell activation cell activation positive regulation of B cell activation regulation of hemopoiesis positive regulation of leukocyte differentiation positive regulation of lymphocyte differentiation regulation of lymphocyte activation negative regulation of hydrolase activity negative regulation of proteolysis regulation of catalytic activity negative regulation of catalytic activity negative regulation of endopeptidase activity negative regulation of peptidase activity regulation of proteolysis proteolysis regulation of endopeptidase activity protein metabolic process negative regulation of protein metabolic process regulation of cysteine-type endopeptidase activity organonitrogen compound metabolic process regulation of protein metabolic process regulation of peptidase activity negative regulation of molecular function regulation of molecular function regulation of hydrolase activity negative regulation of cysteine-type endopeptidase activity	membrane-bounded organelle intracellular organelle protein-containing complex intracellular anatomical structure organelle nucleus nuclear protein-containing complex intracellular membrane-bounded organelle cellular anatomical entity transcription export complex 2 cytoplasm endomembrane system organelle envelope nuclear envelope membrane-bounded organelle intracellular organelle protein-containing complex intracellular anatomical structure organelle nucleus nuclear protein-containing complex intracellular membrane-bounded organelle cellular anatomical entity transcription export complex 2 cytoplasm endomembrane system organelle envelope nuclear envelope nuclear pore nuclear basket nuclear pore
B	26S proteasome complex subunit DSS1	-	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 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 cellular process macromolecule metabolic process double-strand break repair via homologous recombination DNA repair organonitrogen compound catabolic process organonitrogen compound metabolic process catabolic process proteolysis involved in protein catabolic process proteasomal protein catabolic process protein catabolic process proteasome-mediated ubiquitin-dependent protein catabolic process macromolecule catabolic process modification-dependent macromolecule catabolic process modification-dependent protein catabolic process proteolysis ubiquitin-dependent protein catabolic process protein metabolic process organic substance catabolic process cellular localization nitrogen compound transport nucleocytoplasmic transport transport cellular biosynthetic process nuclear transport mRNA transport localization mRNA export from nucleus establishment of localization in cell organic substance biosynthetic process RNA localization nuclear export nucleobase-containing compound transport RNA transport organic substance transport cellular metabolic process nucleic acid transport intracellular transport gene expression establishment of localization macromolecule biosynthetic process RNA export from nucleus establishment of RNA localization biosynthetic process macromolecule localization cellular component organization cellular component biogenesis proteasome assembly cellular component assembly protein-containing complex organization protein-containing complex assembly cellular component organization or biogenesis	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol protein-containing complex catalytic complex peptidase complex proteasome complex endopeptidase complex intracellular protein-containing complex proteasome regulatory particle proteasome regulatory particle, lid subcomplex proteasome accessory complex membrane-bounded organelle intracellular anatomical structure cytoplasm cellular anatomical entity cytosol protein-containing complex catalytic complex peptidase complex proteasome complex endopeptidase complex intracellular protein-containing complex proteasome regulatory particle proteasome regulatory particle, lid subcomplex proteasome accessory complex membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR045114	Csn12 family	Family
A	IPR036388	Winged helix-like DNA-binding domain superfamily	Homologous Superfamily
A	IPR000717	Proteasome component (PCI) domain	Domain
B	IPR007834	DSS1/SEM1	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: Q5JVF3	acute myeloid leukemia malignant mesothelioma ovarian cancer atrial fibrillation medulloblastoma brain aneurysm osteosarcoma
B	Pharos: P60896	squamous cell carcinoma bone disease non-small cell lung carcinoma split hand-foot malformation lung cancer osteoporosis medulloblastoma pneumonia subependymal giant cell astrocytoma

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.