Annotations: 3TXN

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d3txna2	All alpha proteins	DNA/RNA-binding 3-helical bundle	'Winged helix' DNA-binding domain	C-terminal part of PCI (proteasome COP9/signalosome eIF3) domains (PINT motif)	Proteasome regulatory subunit Rpn6, C-terminal domain	Fruit fly (Drosophila melanogaster ) [TaxId: 7227 ],	SCOPe (2.08)
A	d3txna1	All alpha proteins	alpha-alpha superhelix	TPR-like	TPR-like repeats from PCI (proteasome / COP9 signalosome / eIF3) domains	Proteasome regulatory subunit Rpn6, N-terminal domain	Fruit fly (Drosophila melanogaster ) [TaxId: 7227 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PCI	e3txnA1	A: alpha arrays	X: HTH	H: HTH	T: winged	F: PCI	ECOD (1.6)
A	KOG1463	e3txnA3	A: alpha superhelices	X: Repetitive alpha hairpins	H: ARM repeat (From Topology)	T: ARM repeat	F: KOG1463	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.25.40.570	Mainly Alpha	Alpha Horseshoe	Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat		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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	26S proteasome regulatory complex subunit p42B	structural molecule activity	catabolic process proteolysis involved in protein catabolic process primary metabolic process protein catabolic process macromolecule catabolic process modification-dependent macromolecule catabolic process modification-dependent protein catabolic process proteolysis ubiquitin-dependent protein catabolic process metabolic process cellular process macromolecule metabolic process protein metabolic process proteasomal protein catabolic process catabolic process proteolysis involved in protein catabolic process primary metabolic process protein catabolic process macromolecule catabolic process modification-dependent macromolecule catabolic process modification-dependent protein catabolic process proteolysis ubiquitin-dependent protein catabolic process metabolic process cellular process macromolecule metabolic process protein metabolic process proteasomal protein catabolic process proteasome-mediated ubiquitin-dependent protein catabolic process	protein-containing complex catalytic complex peptidase complex proteasome complex endopeptidase complex intracellular protein-containing complex proteasome accessory complex intracellular anatomical structure cellular anatomical structure proteasome regulatory particle cytoplasm cytosol proteasome regulatory particle, lid subcomplex membrane-bounded organelle protein-containing complex catalytic complex peptidase complex proteasome complex endopeptidase complex intracellular protein-containing complex proteasome accessory complex intracellular anatomical structure cellular anatomical structure proteasome regulatory particle cytoplasm cytosol proteasome regulatory particle, lid subcomplex 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	IPR050871	26S Proteasome and COP9 Signalosome Components	Family
A	IPR040780	6S proteasome subunit Rpn6, C-terminal helix domain	Domain
A	IPR036390	Winged helix DNA-binding domain superfamily	Homologous Superfamily
A	IPR040773	26S proteasome regulatory subunit Rpn6, N-terminal	Domain
A	IPR000717	Proteasome component (PCI) domain	Domain

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.