Annotations: 7UJD

PSMD2 Structure bound to MC1 and Fab8/14

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations
Protein Modification Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	MIF4G	e7ujdA1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: MIF4G	ECOD (v294.2)
B [auth C]	MIF4G	e7ujdC1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: MIF4G	ECOD (v294.2)
C [auth D]	MIF4G	e7ujdD1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: MIF4G	ECOD (v294.2)
D [auth E]	MIF4G	e7ujdE1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: MIF4G	ECOD (v294.2)
E [auth F]	MIF4G	e7ujdF1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: MIF4G	ECOD (v294.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.25.10.10	Mainly Alpha	Alpha Horseshoe	Leucine-rich Repeat Variant	Leucine-rich Repeat Variant	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth C]	Light Chain	IGKV1	Kappa	26s proteasome non-atpase regulatory subunit 2	SAbDab (2026-06-12)
C [auth D]	Heavy Chain	IGHV3	-	26s proteasome non-atpase regulatory subunit 2	SAbDab (2026-06-12)
D [auth E]	Light Chain	IGKV1	Kappa	26s proteasome non-atpase regulatory subunit 2	SAbDab (2026-06-12)
E [auth F]	Heavy Chain	IGHV3	-	26s proteasome non-atpase regulatory subunit 2	SAbDab (2026-06-12)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF17781	RPN1 N-terminal domain (RPN1_RPN2_N)	RPN1 N-terminal domain	-	Repeat
A	PF01851	Proteasome/cyclosome repeat (PC_rep)	Proteasome/cyclosome repeat	-	Repeat

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	26S proteasome non-ATPase regulatory subunit 2	enzyme regulator activity molecular function regulator activity	biological process involved in interspecies interaction between organisms response to stimulus immune response response to other organism defense response response to cytokine defense response to symbiont response to external stimulus response to biotic stimulus response to peptide cellular response to type I interferon response to chemical immune system process defense response to other organism response to stress biological process involved in interspecies interaction between organisms response to stimulus immune response response to other organism defense response response to cytokine defense response to symbiont response to external stimulus response to biotic stimulus response to peptide cellular response to type I interferon response to chemical immune system process defense response to other organism response to stress innate immune response cellular response to cytokine stimulus response to external biotic stimulus response to type I interferon catabolic process proteasomal protein catabolic process metabolic process cellular process primary metabolic process protein catabolic process protein metabolic process macromolecule metabolic process macromolecule catabolic process proteasome-mediated ubiquitin-dependent protein catabolic process modification-dependent macromolecule catabolic process modification-dependent protein catabolic process ubiquitin-dependent protein catabolic process regulation of biological process regulation of cellular process regulation of protein metabolic process biological regulation regulation of macromolecule metabolic process regulation of catabolic process regulation of primary metabolic process regulation of proteasomal protein catabolic process regulation of metabolic process regulation of protein catabolic process response to oxidative stress	proteasome accessory complex protein-containing complex intracellular anatomical structure cellular anatomical structure catalytic complex peptidase complex proteasome complex endopeptidase complex intracellular protein-containing complex membrane proteasome regulatory particle proteasome regulatory particle, base subcomplex extracellular exosome membrane-bounded organelle proteasome accessory complex protein-containing complex intracellular anatomical structure cellular anatomical structure catalytic complex peptidase complex proteasome complex endopeptidase complex intracellular protein-containing complex membrane proteasome regulatory particle proteasome regulatory particle, base subcomplex extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle vesicle extracellular membrane-bounded organelle cytoplasm cytosol membrane-enclosed lumen intracellular vesicle ficolin-1-rich granule intracellular membrane-bounded organelle endomembrane system intracellular organelle lumen intracellular organelle organelle lumen cytoplasmic vesicle ficolin-1-rich granule lumen secretory granule secretory vesicle nucleus nucleoplasm nuclear lumen vesicle lumen cytoplasmic vesicle lumen secretory granule lumen membraneless organelle intracellular membraneless organelle proteasome storage granule transport vesicle synapse presynapse synaptic vesicle cell junction exocytic vesicle
B [auth C]	Fab 14 LC CDRs	-	-	-
C [auth D]	Fab 14 HC CDRs	-	-	-
D [auth E]	Fab 8 LC CDRs	-	-	-
E [auth F]	Fab 8 HC CDRs	-	-	-
F [auth Z]	ACY-PHE-PRO-ASP-VAL-SAR-LEU-HIS-ARG-TYR-TRP-GLY-TRP-ASP-CYS-GLY-NH2	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR041433	26S proteasome non-ATPase regulatory subunit RPN1, C-terminal	Domain
A	IPR016024	Armadillo-type fold	Homologous Superfamily
A	IPR002015	Proteasome/cyclosome repeat	Repeat
A	IPR016643	26S proteasome regulatory complex, non-ATPase subcomplex, Rpn1 subunit	Family
A	IPR011989	Armadillo-like helical	Homologous Superfamily
A	IPR040892	RPN1, N-terminal	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	: Q13200	breast cancer ovarian cancer lung cancer psoriasis non-small cell lung carcinoma

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
F [auth Z]	ACY	: AA0441 : (2-aminosuccinimidyl)acetic acid (Asp) MOD:00952 , (2-aminosuccinimidyl)acetic acid (Asn) MOD:01624
F [auth Z]	NH2	: AA0441 , AA0081 , AA0083 , AA0084 , AA0086 , AA0087 , AA0088 , AA0090 , AA0091 , AA0092 , AA0093 , AA0095 , AA0096 , AA0097 , AA0098 , AA0099 , AA0100 : (2-aminosuccinimidyl)acetic acid (Asp) MOD:00952 , (2-aminosuccinimidyl)acetic acid (Asn) MOD:01624 , L-alanine amide MOD:00090 , L-asparagine amide MOD:00092 , L-aspartic acid 1-amide MOD:00093 , L-glutamine amide MOD:00095 , L-glutamic acid 1-amide MOD:00096 , glycine amide MOD:00097 , L-isoleucine amide MOD:00099 , L-leucine amide MOD:00100 , L-lysine amide MOD:00101 , L-methionine amide MOD:00102 , L-proline amide MOD:00104 , L-serine amide MOD:00105 , L-threonine amide MOD:00106 , L-tryptophan amide MOD:00107 , L-tyrosine amide MOD:00108 , L-valine amide MOD:00109
F [auth Z]	SAR	Parent Component: GLY : AA0441 , AA0081 , AA0083 , AA0084 , AA0086 , AA0087 , AA0088 , AA0090 , AA0091 , AA0092 , AA0093 , AA0095 , AA0096 , AA0097 , AA0098 , AA0099 , AA0100 , AA0063 : (2-aminosuccinimidyl)acetic acid (Asp) MOD:00952 , (2-aminosuccinimidyl)acetic acid (Asn) MOD:01624 , L-alanine amide MOD:00090 , L-asparagine amide MOD:00092 , L-aspartic acid 1-amide MOD:00093 , L-glutamine amide MOD:00095 , L-glutamic acid 1-amide MOD:00096 , glycine amide MOD:00097 , L-isoleucine amide MOD:00099 , L-leucine amide MOD:00100 , L-lysine amide MOD:00101 , L-methionine amide MOD:00102 , L-proline amide MOD:00104 , L-serine amide MOD:00105 , L-threonine amide MOD:00106 , L-tryptophan amide MOD:00107 , L-tyrosine amide MOD:00108 , L-valine amide MOD:00109 , N-methylglycine MOD:00072

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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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.