Annotations: 5MSK

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF02251,PF02252	e5mskA1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Proteasome activator reg(alpha) (From Topology)	T: Proteasome activator reg(alpha)	F: PF02251,PF02252	ECOD (1.6)
B	PF02251,PF02252	e5mskB1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Proteasome activator reg(alpha) (From Topology)	T: Proteasome activator reg(alpha)	F: PF02251,PF02252	ECOD (1.6)
C	PF02251,PF02252	e5mskC1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Proteasome activator reg(alpha) (From Topology)	T: Proteasome activator reg(alpha)	F: PF02251,PF02252	ECOD (1.6)
D	PF02251,PF02252	e5mskD1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Proteasome activator reg(alpha) (From Topology)	T: Proteasome activator reg(alpha)	F: PF02251,PF02252	ECOD (1.6)
E	PF02251,PF02252	e5mskE1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Proteasome activator reg(alpha) (From Topology)	T: Proteasome activator reg(alpha)	F: PF02251,PF02252	ECOD (1.6)
F	PF02251,PF02252	e5mskF1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Proteasome activator reg(alpha) (From Topology)	T: Proteasome activator reg(alpha)	F: PF02251,PF02252	ECOD (1.6)
G	PF02251,PF02252	e5mskG1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Proteasome activator reg(alpha) (From Topology)	T: Proteasome activator reg(alpha)	F: PF02251,PF02252	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D, E A, B, C, D, E, F, G	PF02252	Proteasome activator PA28, C-terminal (PA28_C)	Proteasome activator PA28, C-terminal	Proteasome activator 28 (PA28), also known as 11s regulator of REG, binds to the 20S proteasome and simulates peptidase activity in an ATP-independent manner. This entry represents a the C-terminal domain found in PA28 subunits, including PA28alpha/b ...	Proteasome activator 28 (PA28), also known as 11s regulator of REG, binds to the 20S proteasome and simulates peptidase activity in an ATP-independent manner. This entry represents a the C-terminal domain found in PA28 subunits, including PA28alpha/beta/gamma (also known as Proteasome activator complex subunit 1-3) [1-4].	Domain
A, B, C, D, E A, B, C, D, E, F, G	PF02251	Proteasome activator PA28, N-terminal (PA28_N)	Proteasome activator PA28, N-terminal	Proteasome activator 28 (PA28), also known as 11s regulator of REG, binds to the 20S proteasome and simulates peptidase activity in an ATP-independent manner. This entry represents a single alpha-helix N-terminal domain found in PA28 subunits, includ ...	Proteasome activator 28 (PA28), also known as 11s regulator of REG, binds to the 20S proteasome and simulates peptidase activity in an ATP-independent manner. This entry represents a single alpha-helix N-terminal domain found in PA28 subunits, including PA28alpha/beta/gamma (also known as Proteasome activator complex subunit 1-3) [1-4].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D, E A, B, C, D, E, F, G	Proteasome activator complex subunit 2	-	catabolic process proteolysis involved in protein catabolic process macromolecule catabolic process regulation of primary metabolic process regulation of proteolysis involved in protein catabolic process regulation of proteolysis proteolysis protein metabolic process organonitrogen compound catabolic process regulation of biological process organonitrogen compound metabolic process regulation of protein metabolic process biological regulation primary metabolic process catabolic process proteolysis involved in protein catabolic process macromolecule catabolic process regulation of primary metabolic process regulation of proteolysis involved in protein catabolic process regulation of proteolysis proteolysis protein metabolic process organonitrogen compound catabolic process regulation of biological process organonitrogen compound metabolic process regulation of protein metabolic process biological regulation primary metabolic process proteasomal protein catabolic process regulation of macromolecule metabolic process protein catabolic process regulation of catabolic process regulation of proteasomal protein catabolic process metabolic process macromolecule metabolic process regulation of metabolic process regulation of protein catabolic process regulation of cell cycle phase transition regulation of cellular process regulation of cell cycle process cell cycle phase transition regulation of cell cycle G1/S phase transition cell cycle G1/S phase transition mitotic cell cycle regulation of mitotic cell cycle phase transition regulation of mitotic cell cycle regulation of G1/S transition of mitotic cell cycle mitotic cell cycle process cellular process cell cycle regulation of cell cycle G1/S transition of mitotic cell cycle cell cycle process mitotic cell cycle phase transition antigen processing and presentation immune system process antigen processing and presentation of exogenous antigen	proteasome accessory complex protein-containing complex intracellular anatomical structure catalytic complex peptidase complex proteasome activator complex proteasome complex endopeptidase complex cellular anatomical entity intracellular protein-containing complex cytoplasm membrane-bounded organelle nucleus membrane-enclosed lumen proteasome accessory complex protein-containing complex intracellular anatomical structure catalytic complex peptidase complex proteasome activator complex proteasome complex endopeptidase complex cellular anatomical entity intracellular protein-containing complex cytoplasm 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, B, C, D, E A, B, C, D, E, F, G	IPR003186	Proteasome activator PA28, C-terminal domain	Domain
A, B, C, D, E A, B, C, D, E, F, G	IPR036252	Proteasome activator superfamily	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F, G	IPR003185	Proteasome activator PA28, N-terminal domain	Domain
A, B, C, D, E A, B, C, D, E, F, G	IPR036997	Proteasome activator PA28, C-terminal domain superfamily	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F, G	IPR009077	Proteasome activator PA28	Family
A, B, C, D, E A, B, C, D, E, F, G	IPR036996	Proteasome activator PA28, N-terminal 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 R01GM133198.