3H0T | pdb_00003h0t

Hepcidin-Fab complex

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations
Membrane Protein Annotation: OPM

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
C	d3h0tc_	Peptides	Antimicrobial beta-hairpin	Antimicrobial beta-hairpin	Hepcidin	Hepcidin	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d3h0ta2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d3h0ta1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B		e3h0tB1	A: Alpha-beta plaits	X: Origin of replication-binding domains	H: Origin of replication-binding domains	T: Glyco_hydro_3	F:	ECOD (20:10:01)
A		e3h0tA1	A: Alpha-beta plaits	X: Immunoglobulin-related	H: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	T: Calx-beta	F:	ECOD (20:10:01)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
B	Antibody Fab Fragment	VH-CH1	Homo sapiens (human)	IGHV6-101, IGHV6-102, IGHJ101, IGHG101, IGHG102, IGHG104	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_LAMBDA	IMGT (202609-0)
A	Antibody Fab Fragment	L-LAMBDA	Homo sapiens (human)	IGLV6-5701, IGLJ201, IGLJ302, IGLJ301, IGLC201, IGLC202, IGLC3*04	V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA	IG	FAB-GAMMA-1_LAMBDA	IMGT (202609-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B	Heavy Chain	IGHV6	-	hepcidin	SAbDab (2026-03-13)
A	Light Chain	IGLV6	Lambda	hepcidin	SAbDab (2026-03-13)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C	Hepcidin	hormone activity molecular function activator activity molecular function regulator activity signaling receptor regulator activity receptor ligand activity signaling receptor activator activity transporter regulator activity	intracellular iron ion homeostasis inorganic ion homeostasis cellular homeostasis chemical homeostasis homeostatic process intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis multicellular organismal process system process regulation of biological process regulation of intestinal absorption intracellular iron ion homeostasis inorganic ion homeostasis cellular homeostasis chemical homeostasis homeostatic process intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis multicellular organismal process system process regulation of biological process regulation of intestinal absorption digestive system process negative regulation of intestinal absorption regulation of system process biological regulation negative regulation of biological process regulation of digestive system process digestion intestinal absorption regulation of multicellular organismal process negative regulation of multicellular organismal process negative regulation of digestive system process response to stimulus immune response immune system process defense response to fungus biological process involved in interspecies interaction between organisms response to other organism defense response response to stress response to external stimulus response to fungus response to external biotic stimulus response to biotic stimulus cellular process disruption of cell in another organism disruption of anatomical structure in another organism killing of cells of another organism cell killing regulation of localization regulation of cellular process transport monoatomic ion transmembrane transport negative regulation of monoatomic ion transport negative regulation of iron ion transmembrane transport negative regulation of transport regulation of monoatomic ion transmembrane transport export across plasma membrane metal ion transport negative regulation of transmembrane transport monoatomic cation transmembrane transport negative regulation of iron export across plasma membrane localization regulation of iron ion transmembrane transport negative regulation of monoatomic ion transmembrane transport negative regulation of cellular process monoatomic ion transport negative regulation of cation transmembrane transport monoatomic cation transport regulation of metal ion transport negative regulation of iron ion transport regulation of iron export across plasma membrane regulation of transport regulation of monoatomic ion transport regulation of iron ion transport iron ion transport export from cell iron ion transmembrane transport establishment of localization transmembrane transport regulation of transmembrane transport transition metal ion transport regulation of monoatomic cation transmembrane transport iron ion export across plasma membrane multicellular organismal-level iron ion homeostasis multicellular organismal-level homeostasis multicellular organismal-level chemical homeostasis RNA metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process regulation of RNA metabolic process transcription by RNA polymerase II negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of transcription by RNA polymerase II negative regulation of DNA-templated transcription negative regulation of transcription by RNA polymerase II negative regulation of metabolic process primary metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process negative regulation of RNA metabolic process positive regulation of proteasomal protein catabolic process catabolic process positive regulation of protein metabolic process positive regulation of biological process proteasome-mediated ubiquitin-dependent protein catabolic process regulation of ubiquitin-dependent protein catabolic process macromolecule catabolic process positive regulation of metabolic process positive regulation of ubiquitin-dependent protein catabolic process modification-dependent macromolecule catabolic process positive regulation of macromolecule metabolic process protein metabolic process positive regulation of cellular process regulation of protein metabolic process proteasomal protein catabolic process protein catabolic process regulation of catabolic process positive regulation of protein catabolic process positive regulation of catabolic process regulation of proteasomal ubiquitin-dependent protein catabolic process modification-dependent protein catabolic process regulation of proteasomal protein catabolic process positive regulation of proteasomal ubiquitin-dependent protein catabolic process ubiquitin-dependent protein catabolic process regulation of protein catabolic process response to metal ion response to iron ion response to chemical defense response to bacterium response to bacterium	cellular anatomical structure extracellular region extracellular space
B	Fab fragment, Heavy chain	-	-	-
A	Fab fragment, Light chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C	IPR010500	Hepcidin	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
C	Pharos: P81172	hereditary hemochromatosis beta thalassemia hemochromatosis type 2B Wilson disease anemia biliary atresia chronic kidney disease Iron Overload hepatocellular carcinoma iron deficiency anemia large cell medulloblastoma primitive neuroectodermal tumor hemochromatosis type 1 iron metabolism disease kidney cancer hereditary hemochromatosis beta thalassemia hemochromatosis type 2B Wilson disease anemia biliary atresia chronic kidney disease Iron Overload hepatocellular carcinoma iron deficiency anemia large cell medulloblastoma primitive neuroectodermal tumor hemochromatosis type 1 iron metabolism disease kidney cancer X-linked mixed deafness with perilymphatic gusher cystic fibrosis glioblastoma hemochromatosis type 2 hereditary persistence of fetal hemoglobin inborn errors of metabolism kidney neoplasm atypical teratoid rhabdoid tumor medulloblastoma cholestasis thalassemia minor dilated cardiomyopathy hemochromatosis type 2A

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
C	OPM	Peptides	Beta-hairpin peptides	Hepcidin	Hepcidin

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.