7U5B | pdb_00007u5b

Structure of Human KLK5 bound to anti-KLK5 Fab

External Resource: Annotation

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

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
F [auth I]	Trypsin_1	e7u5bI1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel 2	F: Trypsin_1	ECOD (1.6)
D [auth J]	Trypsin_1	e7u5bJ1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel 2	F: Trypsin_1	ECOD (1.6)
E [auth L]	C1-set_4	e7u5bL2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_4	ECOD (1.6)
E [auth L]	V-set	e7u5bL1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set	ECOD (1.6)
B	C1-set_4	e7u5bB2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_4	ECOD (1.6)
B	V-set	e7u5bB1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set	ECOD (1.6)
C [auth H]	V-set_8	e7u5bH2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_8	ECOD (1.6)
C [auth H]	C1-set_1	e7u5bH1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_1	ECOD (1.6)
A	V-set_8	e7u5bA2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_8	ECOD (1.6)
A	C1-set_1	e7u5bA1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
F [auth I]	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (utative)
D [auth J]	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (utative)
E [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
C [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
A	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B, E [auth L]	Light Chain	IGKV1	Kappa	kallikrein-5	SAbDab (2025-12-05)
A, C [auth H]	Heavy Chain	IGHV3	-	kallikrein-5	SAbDab (2025-12-05)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D [auth J], F [auth I]	Kallikrein-5	peptidase activity catalytic activity, acting on a protein hydrolase activity catalytic activity serine hydrolase activity serine-type peptidase activity serine-type endopeptidase activity endopeptidase activity	cellular response to stimulus positive regulation of cell communication regulation of biological process regulation of signaling regulation of cellular process positive regulation of signal transduction response to stimulus signaling biological regulation positive regulation of biological process regulation of signal transduction positive regulation of G protein-coupled receptor signaling pathway cell communication positive regulation of response to stimulus regulation of response to stimulus cellular response to stimulus positive regulation of cell communication regulation of biological process regulation of signaling regulation of cellular process positive regulation of signal transduction response to stimulus signaling biological regulation positive regulation of biological process regulation of signal transduction positive regulation of G protein-coupled receptor signaling pathway cell communication positive regulation of response to stimulus regulation of response to stimulus regulation of cell communication G protein-coupled receptor signaling pathway cellular process signal transduction regulation of G protein-coupled receptor signaling pathway positive regulation of cellular process positive regulation of signaling developmental process anatomical structure morphogenesis odontogenesis of dentin-containing tooth anatomical structure formation involved in morphogenesis anatomical structure development odontogenesis animal organ development amelogenesis animal organ morphogenesis multicellular organismal process epithelium development keratinization epidermal cell differentiation cellular developmental process epidermis development tissue development cell death epithelial cell differentiation skin development cell differentiation keratinocyte differentiation programmed cell death cornification biosynthetic process metabolic process primary metabolic process protein metabolic process macromolecule metabolic process gene expression macromolecule biosynthetic process protein maturation regulation of humoral immune response antibacterial peptide production regulation of immune effector process positive regulation of response to biotic stimulus positive regulation of macromolecule biosynthetic process response to biotic stimulus positive regulation of metabolic process antimicrobial humoral immune response mediated by antimicrobial peptide positive regulation of immune response response to bacterium regulation of immune system process positive regulation of macromolecule metabolic process positive regulation of immune system process response to other organism immune response response to external stimulus immune effector process regulation of gene expression defense response to other organism positive regulation of defense response positive regulation of production of molecular mediator of immune response regulation of immune response regulation of macromolecule biosynthetic process regulation of production of molecular mediator of immune response regulation of metabolic process regulation of defense response humoral immune response regulation of response to biotic stimulus biological process involved in interspecies interaction between organisms regulation of response to external stimulus regulation of antibacterial peptide production antimicrobial humoral response defense response to bacterium positive regulation of defense response to bacterium positive regulation of antimicrobial peptide production positive regulation of humoral immune response positive regulation of response to external stimulus positive regulation of biosynthetic process antimicrobial peptide production response to stress regulation of response to stress positive regulation of immune effector process response to external biotic stimulus production of molecular mediator of immune response regulation of biosynthetic process regulation of defense response to bacterium regulation of antimicrobial humoral response defense response defense response to symbiont antibacterial humoral response regulation of macromolecule metabolic process positive regulation of antimicrobial humoral response regulation of antimicrobial peptide production positive regulation of gene expression immune system process positive regulation of antibacterial peptide production cellular component organization cellular component disassembly extracellular matrix disassembly extracellular matrix organization cellular component organization or biogenesis extracellular structure organization external encapsulating structure organization proteolysis	cellular anatomical structure extracellular region intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle intracellular vesicle intracellular membrane-bounded organelle epidermal lamellar body endomembrane system intracellular organelle lamellar body cytoplasmic vesicle organelle cellular anatomical structure extracellular region intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle intracellular vesicle intracellular membrane-bounded organelle epidermal lamellar body endomembrane system intracellular organelle lamellar body cytoplasmic vesicle organelle secretory granule secretory vesicle vesicle extracellular space
B, E [auth L]	anti-KLK5 Fab Light Chain	-	-	-
A, C [auth H]	anti-KLK5 Fab Heavy Chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
D [auth J], F [auth I]	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
D [auth J], F [auth I]	IPR001314	Peptidase S1A, chymotrypsin family	Family
D [auth J], F [auth I]	IPR033116	Serine proteases, trypsin family, serine active site	Active Site
D [auth J], F [auth I]	IPR001254	Serine proteases, trypsin domain	Domain
D [auth J], F [auth I]	IPR043504	Peptidase S1, PA clan, chymotrypsin-like fold	Homologous Superfamily
D [auth J], F [auth I]	IPR018114	Serine proteases, trypsin family, histidine active site	Active Site

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
D [auth J], F [auth I]	Pharos: Q9Y337	prostate cancer astrocytic tumor breast carcinoma invasive ductal breast carcinoma oligodendroglioma Prostatic Neoplasms atopic eczema diabetes mellitus malignant ependymoma rosacea breast cancer esophageal adenocarcinoma Netherton syndrome prostate 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.