Annotations: 9J83

Cryo-EM structure of Aquifex aeolicus RseP E18Q mutant in complex with Fab

External Resource: Annotation

Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: PDBTM
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	Catalase	e9j83A01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: Catalase	ECOD (v294.2)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth L]	Light Chain	IGKV6	Kappa	putative zinc metalloprotease aq_1964	SAbDab (2026-05-08)
B [auth H]	Heavy Chain	IGHV7	-	putative zinc metalloprotease aq_1964	SAbDab (2026-05-08)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF02163	Peptidase family M50 (Peptidase_M50)	Peptidase family M50	-	Family
A	PF17820	PDZ domain (PDZ_6)	PDZ domain	This entry represents the PDZ domain from a wide variety of proteins.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D [auth C]	unknown peptide	-	-	-
C [auth L]	L chain of mouse monoclonal antibody IgG 4A9	-	-	-
B [auth H]	VH-CH1 region of mouse monoclonal antibody IgG 4A9	-	-	-
A	Putative zinc metalloprotease aq_1964	peptidase activity catalytic activity, acting on a protein hydrolase activity catalytic activity endopeptidase activity cation binding ion binding binding metal ion binding small molecule binding metalloendopeptidase activity metallopeptidase activity	proteolysis metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process	cell periphery cellular anatomical structure plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR004387	Peptidase M50, putative membrane-associated zinc metallopeptidase	Family
A	IPR041489	PDZ domain 6	Domain
A	IPR008915	Peptidase M50	Domain
A	IPR001478	PDZ domain	Domain
A	IPR036034	PDZ superfamily	Homologous Superfamily

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A	PDBTM	Annotated as membrane protein by PDBTM

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
D [auth C]	UNK
A	FME	Parent Component: MET : AA0021 , AA0566 : N-formyl-L-methionine residue MOD:00030 , N-formyl-L-methionine (Met) MOD:00482 , N-[(L-histidin-1'-yl)methyl]-L-methionine (fMet) MOD:01890 , N-[(L-histidin-1'-yl)methyl]-L-methionine (Met) MOD:01891
A	SNN	Parent Component: ASN : AA0021 , AA0566 , AA0302 , AA0593 : N-formyl-L-methionine residue MOD:00030 , N-formyl-L-methionine (Met) MOD:00482 , N-[(L-histidin-1'-yl)methyl]-L-methionine (fMet) MOD:01890 , N-[(L-histidin-1'-yl)methyl]-L-methionine (Met) MOD:01891 , L-aspartimide MOD:00307 , 2-(2-aminosuccinimidyl)pentanedioic acid (Asn) MOD:01940 , 2-(2-aminosuccinimidyl)pentanedioic acid (Asp) MOD:01941

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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.