Annotations: 8SML

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D	SCOP2B Superfamily	Peptidylarginine deiminase Pad4, middle domain	8039684	3000247	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Pentein	8039686	3000640	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Cupredoxins	8039685	3000886	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Peptidylarginine deiminase Pad4, middle domain	8039684	3000247	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Pentein	8039686	3000640	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Cupredoxins	8039685	3000886	SCOP2B (2022-06-29)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C, F	Heavy Chain	IGHV3	-	protein-arginine deiminase type-4	SAbDab (2025-12-05)
B, E	Light Chain	IGKV1	Kappa	protein-arginine deiminase type-4	SAbDab (2025-12-05)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, D	PF08527	Protein-arginine deiminase (PAD) middle domain (PAD_M)	Protein-arginine deiminase (PAD) middle domain	This family represents the central non-catalytic domain of protein-arginine deiminase. This domain has an immunoglobulin-like fold.	Domain
A, D	PF03068	Protein-arginine deiminase (PAD) (PAD)	Protein-arginine deiminase (PAD)	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C, F	Fab hI365 heavy chain	-	-	-
B, E	Fab hI365 light chain	-	-	-
A, D	Protein-arginine deiminase type-4	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding histone H3 arginine deiminase activity catalytic activity, acting on a protein histone H3R8 arginine deiminase activity histone arginine deiminase activity hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in linear amidines hydrolase activity histone modifying activity protein-arginine deiminase activity cation binding ion binding binding calcium ion binding metal ion binding small molecule binding histone H3 arginine deiminase activity catalytic activity, acting on a protein histone H3R8 arginine deiminase activity histone arginine deiminase activity hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in linear amidines hydrolase activity histone modifying activity protein-arginine deiminase activity catalytic activity hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds histone H3R26 arginine deiminase activity histone H3R2 arginine deiminase activity histone H3R17 arginine deiminase activity identical protein binding protein binding	macromolecule modification metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process protein modification process biological process involved in interspecies interaction between organisms response to stimulus immune response response to other organism defense response defense response to symbiont response to external stimulus macromolecule modification metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process protein modification process biological process involved in interspecies interaction between organisms response to stimulus immune response response to other organism defense response defense response to symbiont response to external stimulus response to biotic stimulus immune system process defense response to other organism response to stress innate immune response response to external biotic stimulus protein-containing complex organization protein-DNA complex assembly cellular component organization protein-DNA complex organization cellular component biogenesis cellular component assembly chromatin organization protein-containing complex assembly chromatin remodeling cellular component organization or biogenesis nucleosome assembly nucleosome organization post-translational protein modification developmental process multicellular organismal process maintenance of cell number stem cell population maintenance	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen protein-containing complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, D	IPR013732	Protein-arginine deiminase (PAD), N-terminal	Domain
A, D	IPR013733	Protein-arginine deiminase (PAD), central domain	Domain
A, D	IPR008972	Cupredoxin	Homologous Superfamily
A, D	IPR038685	PAD, N-terminal domain superfamily	Homologous Superfamily
A, D	IPR013530	Protein-arginine deiminase, C-terminal	Domain
A, D	IPR036556	Protein-arginine deiminase, central domain superfamily	Homologous Superfamily
A, D	IPR004303	Protein-arginine deiminase	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, D	Pharos: Q9UM07	rheumatoid arthritis Mammary Neoplasms, Experimental sarcomatoid carcinoma carcinoma skin basal cell carcinoma osteosarcoma tuberculosis mammary neoplasms, animal psoriasis schizophrenia undifferentiated carcinoma

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.