4QAE

Crystal structure of an engineered lipocalin (Anticalin) in complex with human hepcidin

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
G [auth A]	SCOP2B Superfamily	Lipocalins	8033646	3001332	SCOP2B (2022-06-29)
H [auth B]	SCOP2B Superfamily	Lipocalins	8033646	3001332	SCOP2B (2022-06-29)
I [auth C]	SCOP2B Superfamily	Lipocalins	8033646	3001332	SCOP2B (2022-06-29)
J [auth D]	SCOP2B Superfamily	Lipocalins	8033646	3001332	SCOP2B (2022-06-29)
K [auth E]	SCOP2B Superfamily	Lipocalins	8033646	3001332	SCOP2B (2022-06-29)
L [auth F]	SCOP2B Superfamily	Lipocalins	8033646	3001332	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
G [auth A]	Lipocalin	e4qaeA1	A: beta barrels	X: Lipocalins/Streptavidin	H: Lipocalins (From Topology)	T: Lipocalins	F: Lipocalin	ECOD (1.6)
H [auth B]	Lipocalin	e4qaeB1	A: beta barrels	X: Lipocalins/Streptavidin	H: Lipocalins (From Topology)	T: Lipocalins	F: Lipocalin	ECOD (1.6)
I [auth C]	Lipocalin	e4qaeC1	A: beta barrels	X: Lipocalins/Streptavidin	H: Lipocalins (From Topology)	T: Lipocalins	F: Lipocalin	ECOD (1.6)
J [auth D]	Lipocalin	e4qaeD1	A: beta barrels	X: Lipocalins/Streptavidin	H: Lipocalins (From Topology)	T: Lipocalins	F: Lipocalin	ECOD (1.6)
K [auth E]	Lipocalin	e4qaeE1	A: beta barrels	X: Lipocalins/Streptavidin	H: Lipocalins (From Topology)	T: Lipocalins	F: Lipocalin	ECOD (1.6)
L [auth F]	Lipocalin	e4qaeF1	A: beta barrels	X: Lipocalins/Streptavidin	H: Lipocalins (From Topology)	T: Lipocalins	F: Lipocalin	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
G [auth A]	2.40.128.20	Mainly Beta	Beta Barrel	Lipocalin	Calycin beta-barrel core domain	CATH (4.3.0)
H [auth B]	2.40.128.20	Mainly Beta	Beta Barrel	Lipocalin	Calycin beta-barrel core domain	CATH (4.3.0)
I [auth C]	2.40.128.20	Mainly Beta	Beta Barrel	Lipocalin	Calycin beta-barrel core domain	CATH (4.3.0)
J [auth D]	2.40.128.20	Mainly Beta	Beta Barrel	Lipocalin	Calycin beta-barrel core domain	CATH (4.3.0)
K [auth E]	2.40.128.20	Mainly Beta	Beta Barrel	Lipocalin	Calycin beta-barrel core domain	CATH (4.3.0)
L [auth F]	2.40.128.20	Mainly Beta	Beta Barrel	Lipocalin	Calycin beta-barrel core domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth P], B [auth Q], C [auth R], D [auth S], E [auth T], A [auth P], B [auth Q], C [auth R], D [auth S], E [auth T], F [auth U]	PF06446	Hepcidin (Hepcidin)	Hepcidin	Hepcidin is a antibacterial and antifungal protein expressed in the liver and is also a signaling molecule in iron metabolism. The hepcidin protein is cysteine-rich and forms a distorted beta-sheet with an unusual disulphide bond found at the turn of ...	Hepcidin is a antibacterial and antifungal protein expressed in the liver and is also a signaling molecule in iron metabolism. The hepcidin protein is cysteine-rich and forms a distorted beta-sheet with an unusual disulphide bond found at the turn of the hairpin [1].	Domain
G [auth A], H [auth B], I [auth C], J [auth D], K [auth E], G [auth A], H [auth B], I [auth C], J [auth D], K [auth E], L [auth F]	PF00061	Lipocalin / cytosolic fatty-acid binding protein family (Lipocalin)	Lipocalin / cytosolic fatty-acid binding protein family	Lipocalins are transporters for small hydrophobic molecules, such as lipids, steroid hormones, bilins, and retinoids. The family also encompasses the enzyme prostaglandin D synthase (EC:5.3.99.2). Alignment subsumes both the lipocalin and fatty acid ...	Lipocalins are transporters for small hydrophobic molecules, such as lipids, steroid hormones, bilins, and retinoids. The family also encompasses the enzyme prostaglandin D synthase (EC:5.3.99.2). Alignment subsumes both the lipocalin and fatty acid binding protein signatures from PROSITE. This is supported on structural and functional grounds. The structure is an eight-stranded beta barrel.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth P], B [auth Q], C [auth R], D [auth S], E [auth T], A [auth P], B [auth Q], C [auth R], D [auth S], E [auth T], F [auth U]	Hepcidin	cation binding transition metal ion binding copper ion binding ion binding binding metal ion binding small molecule binding hormone activity protein binding molecular function activator activity signaling receptor binding molecular function regulator activity signaling receptor regulator activity receptor ligand activity cation binding transition metal ion binding copper ion binding ion binding binding metal ion binding small molecule binding hormone activity protein binding molecular function activator activity signaling receptor binding molecular function regulator activity signaling receptor regulator activity receptor ligand activity signaling receptor activator 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 regulation of macrophage activation multicellular organismal process regulation of biological process positive regulation of macrophage activation 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 regulation of macrophage activation multicellular organismal process regulation of biological process positive regulation of macrophage activation regulation of cellular process regulation of leukocyte activation cell activation biological regulation positive regulation of biological process regulation of cell activation myeloid leukocyte activation leukocyte activation macrophage activation positive regulation of cell activation immune system process positive regulation of leukocyte activation positive regulation of multicellular organismal process cellular process regulation of multicellular organismal process regulation of immune system process positive regulation of immune system process positive regulation of cellular process response to stimulus immune response cellular biosynthetic process cellular metabolic process RNA metabolic process primary metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription organic cyclic compound metabolic process nucleic acid biosynthetic process transcription by RNA polymerase II organic substance metabolic process biosynthetic process organic cyclic compound biosynthetic process organic substance biosynthetic process metabolic process macromolecule metabolic process regulation of defense response regulation of response to external stimulus negative regulation of inflammatory response defense response negative regulation of response to stimulus negative regulation of biological process response to external stimulus regulation of inflammatory response regulation of response to stimulus response to stress negative regulation of response to external stimulus regulation of response to stress negative regulation of defense response inflammatory response organonitrogen compound catabolic process organonitrogen compound metabolic process catabolic process protein catabolic process macromolecule catabolic process protein metabolic process organic substance catabolic process multicellular organismal-level iron ion homeostasis multicellular organismal-level homeostasis multicellular organismal-level chemical homeostasis positive regulation of protein metabolic process regulation of primary metabolic process positive regulation of metabolic process positive regulation of macromolecule metabolic process regulation of protein metabolic process regulation of macromolecule metabolic process regulation of catabolic process positive regulation of protein catabolic process positive regulation of catabolic process regulation of metabolic process regulation of protein catabolic process response to metal ion response to iron ion response to chemical response to inorganic substance biological process involved in interspecies interaction between organisms response to other organism response to biotic stimulus defense response to bacterium defense response to other organism response to bacterium response to external biotic stimulus localization cellular localization establishment of localization in cell establishment of localization homeostasis of number of cells myeloid cell homeostasis negative regulation of tissue remodeling negative regulation of bone remodeling regulation of bone remodeling tissue homeostasis regulation of tissue remodeling regulation of bone resorption bone resorption negative regulation of bone resorption tissue remodeling bone remodeling anatomical structure homeostasis negative regulation of multicellular organismal process system process regulation of intestinal absorption digestive system process negative regulation of intestinal absorption regulation of system process regulation of digestive system process digestion intestinal absorption negative regulation of digestive system process defense response to fungus response to fungus disruption of cell in another organism disruption of anatomical structure in another organism killing of cells of another organism cell killing transport monoatomic ion transmembrane transport iron ion transport iron ion transmembrane transport inorganic ion transmembrane transport metal ion transport inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport transition metal ion transport monoatomic ion transport monoatomic cation transport cellular response to stimulus cell surface receptor signaling pathway via STAT cell surface receptor signaling pathway signaling cell communication signal transduction cell surface receptor signaling pathway via JAK-STAT negative regulation of cellular metabolic process negative regulation of RNA biosynthetic process regulation of RNA metabolic process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic 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 regulation of cellular metabolic process negative regulation of cellular biosynthetic process regulation of gene expression negative regulation of macromolecule biosynthetic process regulation of macromolecule biosynthetic process regulation of DNA-templated transcription negative regulation of RNA metabolic process negative regulation of cellular process regulation of RNA biosynthetic process negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of cellular biosynthetic process negative regulation of biosynthetic process regulation of localization negative regulation of monoatomic ion transport negative regulation of iron ion transmembrane transport negative regulation of transport regulation of monoatomic ion transmembrane transport negative regulation of transmembrane transport regulation of iron ion transmembrane transport negative regulation of monoatomic ion transmembrane transport negative regulation of cation transmembrane transport regulation of metal ion transport negative regulation of iron ion transport regulation of transport regulation of monoatomic ion transport regulation of iron ion transport regulation of transmembrane transport regulation of monoatomic cation transmembrane transport positive regulation of macromolecule biosynthetic process positive regulation of nucleobase-containing compound metabolic process positive regulation of transcription by RNA polymerase II positive regulation of RNA metabolic process positive regulation of DNA-templated transcription positive regulation of cellular metabolic process positive regulation of biosynthetic process positive regulation of RNA biosynthetic process positive regulation of cellular biosynthetic process	extracellular region cellular anatomical entity extracellular space membrane-bounded organelle intracellular organelle intracellular anatomical structure organelle nucleus intracellular membrane-bounded organelle
G [auth A], H [auth B], I [auth C], J [auth D], K [auth E], G [auth A], H [auth B], I [auth C], J [auth D], K [auth E], L [auth F]	Neutrophil gelatinase-associated lipocalin	molecular sequestering activity iron ion sequestering activity metal ion sequestering activity binding small molecule binding cation binding transition metal ion binding iron ion binding ion binding metal ion binding organic cyclic compound binding anion binding macrolide binding heterocyclic compound binding molecular sequestering activity iron ion sequestering activity metal ion sequestering activity binding small molecule binding cation binding transition metal ion binding iron ion binding ion binding metal ion binding organic cyclic compound binding anion binding macrolide binding heterocyclic compound binding enterobactin binding identical protein binding protein binding	multicellular organismal process regulation of biological process homeostatic process biological regulation positive regulation of biological process adaptive thermogenesis positive regulation of metabolic process multicellular organismal-level homeostasis regulation of cold-induced thermogenesis cold-induced thermogenesis temperature homeostasis positive regulation of cold-induced thermogenesis positive regulation of multicellular organismal process metabolic process multicellular organismal process regulation of biological process homeostatic process biological regulation positive regulation of biological process adaptive thermogenesis positive regulation of metabolic process multicellular organismal-level homeostasis regulation of cold-induced thermogenesis cold-induced thermogenesis temperature homeostasis positive regulation of cold-induced thermogenesis positive regulation of multicellular organismal process metabolic process regulation of multicellular organismal process regulation of metabolic process cellular process apoptotic process cell death programmed cell death 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 defense response to bacterium response to bacterium siderophore transport localization transport iron ion transport transition metal ion transport monoatomic ion transport monoatomic cation transport establishment of localization metal ion transport iron coordination entity transport	extracellular region cellular anatomical entity extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle organelle extracellular space vesicle extracellular membrane-bounded organelle vesicle lumen intracellular anatomical structure intracellular vesicle membrane-enclosed lumen extracellular region cellular anatomical entity extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle organelle extracellular space vesicle extracellular membrane-bounded organelle vesicle lumen intracellular anatomical structure intracellular vesicle membrane-enclosed lumen cytoplasmic vesicle lumen intracellular membrane-bounded organelle secretory granule lumen endomembrane system intracellular organelle lumen intracellular organelle cytoplasmic vesicle organelle lumen specific granule lumen secretory granule secretory vesicle cytoplasm specific granule

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth P], B [auth Q], C [auth R], D [auth S], E [auth T], A [auth P], B [auth Q], C [auth R], D [auth S], E [auth T], F [auth U]	IPR010500	Hepcidin	Family
G [auth A], H [auth B], I [auth C], J [auth D], K [auth E], G [auth A], H [auth B], I [auth C], J [auth D], K [auth E], L [auth F]	IPR012674	Calycin	Homologous Superfamily
G [auth A], H [auth B], I [auth C], J [auth D], K [auth E], G [auth A], H [auth B], I [auth C], J [auth D], K [auth E], L [auth F]	IPR003087	Neutrophil gelatinase-associated lipocalin/epididymal-specific lipocalin-12	Family
G [auth A], H [auth B], I [auth C], J [auth D], K [auth E], G [auth A], H [auth B], I [auth C], J [auth D], K [auth E], L [auth F]	IPR002345	Lipocalin	Family
G [auth A], H [auth B], I [auth C], J [auth D], K [auth E], G [auth A], H [auth B], I [auth C], J [auth D], K [auth E], L [auth F]	IPR000566	Lipocalin/cytosolic fatty-acid binding domain	Domain
G [auth A], H [auth B], I [auth C], J [auth D], K [auth E], G [auth A], H [auth B], I [auth C], J [auth D], K [auth E], L [auth F]	IPR022272	Lipocalin family conserved site	Conserved Site

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth P], B [auth Q], C [auth R], D [auth S], E [auth T], A [auth P], B [auth Q], C [auth R], D [auth S], E [auth T], F [auth U]	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
G [auth A], H [auth B], I [auth C], J [auth D], K [auth E], G [auth A], H [auth B], I [auth C], J [auth D], K [auth E], L [auth F]	Pharos: P80188	rheumatoid arthritis beta thalassemia kidney disease adult acute respiratory distress syndrome Inflammation cancer contact dermatitis heart valve disease calcinosis cutaneous lupus erythematosus ovarian cancer pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia gastric carcinoma acute kidney failure ulcerative colitis rheumatoid arthritis beta thalassemia kidney disease adult acute respiratory distress syndrome Inflammation cancer contact dermatitis heart valve disease calcinosis cutaneous lupus erythematosus ovarian cancer pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia gastric carcinoma acute kidney failure ulcerative colitis benign neoplasm lung cancer malignant pancreatic neoplasm chronic renal failure syndrome nasopharyngeal carcinoma non-small cell lung carcinoma cystic fibrosis pancreatic ductal adenocarcinoma pituitary cancer exocrine pancreatic carcinoma schizophrenia head and neck cancer thalassemia minor hepatocellular carcinoma interstitial cystitis lung carcinoma MALT lymphoma Crohn disease osteosarcoma pancreatic intraductal papillary-mucinous neoplasm drug-induced liver injury psoriasis gastric cancer sinusitis hepatitis, non-human animal astrocytic tumor hereditary persistence of fetal hemoglobin lung adenocarcinoma malignant mesothelioma chronic obstructive pulmonary disease

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.