CTSB - cathepsin B Gene
Also Known as APPS; CPSB; RECEUP
Species: Homo sapiens
About CTSB
This gene has 62 transcripts (splice variants), 1 gene allele, 224 orthologues, 12 paralogues and is associated with 2 phenotypes. Broad expression in thyroid (RPKM 602.1), appendix (RPKM 198.7) and 21 other tissues.
Summary
This gene encodes a member of the C1 family of peptidases. Alternative splicing of this gene results in multiple transcript variants. At least one of these variants encodes a preproprotein that is proteolytically processed to generate multiple protein products. These products include the Cathepsin B light and heavy chains, which can dimerize to form the double chain form of the enzyme. This enzyme is a lysosomal cysteine protease with both endopeptidase and exopeptidase activity that may play a role in protein turnover. It is also known as amyloid precursor protein secretase and is involved in the proteolytic processing of amyloid precursor protein (APP). Incomplete proteolytic processing of APP has been suggested to be a causative factor in Alzheimer's disease, the most common cause of dementia. Overexpression of the encoded protein has been associated with esophageal adenocarcinoma and Other tumors. Both Cathepsin B and Cathepsin L are involved in the cleavage of the spike protein from the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) upon its entry to the human host cell. Multiple pseudogenes of this gene have been identified. [provided by RefSeq, Sep 2020]
CTSB Products (13)
| mRNA | Protein | Name |
|---|---|---|
| NM_001908.5 | NP_001899.1 | cathepsin B isoform 1 preproprotein |
| NM_001384726.1 | NP_001371655.1 | cathepsin B isoform 1 preproprotein |
| NM_147782.4 | NP_680092.1 | cathepsin B isoform 1 preproprotein |
| NM_147780.4 | NP_680090.1 | cathepsin B isoform 1 preproprotein |
| NM_001384714.1 | NP_001371643.1 | cathepsin B isoform 1 preproprotein |
| NM_001317237.2 | NP_001304166.1 | cathepsin B isoform 2 |
| NM_001384725.1 | NP_001371654.1 | cathepsin B isoform 1 preproprotein |
| NM_001384728.1 | NP_001371657.1 | cathepsin B isoform 1 preproprotein |
| NM_001384723.1 | NP_001371652.1 | cathepsin B isoform 1 preproprotein |
| NM_147781.4 | NP_680091.1 | cathepsin B isoform 1 preproprotein |
| NM_001384727.1 | NP_001371656.1 | cathepsin B isoform 1 preproprotein |
| NM_147783.4 | NP_680093.1 | cathepsin B isoform 1 preproprotein |
| NM_001384724.1 | NP_001371653.1 | cathepsin B isoform 1 preproprotein |
| Molecular Function GO Annotation | Evidence | References | Source |
|---|---|---|---|
| enables collagen binding |
IDA
IDA: Inferred from direct assay
|
22952693 | GOA |
| enables cysteine-type endopeptidase activity |
IDA
IDA: Inferred from direct assay
|
6203523 | GOA |
| enables cysteine-type peptidase activity |
IDA
IDA: Inferred from direct assay
|
8612130 | GOA |
| enables peptidase activity |
IDA
IDA: Inferred from direct assay
|
7890620 | GOA |
| enables protein binding |
IPI
IPI: Inferred from physical interaction
|
6203523 | GOA |
| enables proteoglycan binding |
IPI
IPI: Inferred from physical interaction
|
22952693 | GOA |
| Biological Process GO Annotation | Evidence | References | Source |
|---|---|---|---|
| involved in cellular response to thyroid hormone stimulus |
IEP
IEP: Inferred from expression pattern
|
21217776 | GOA |
| involved in collagen catabolic process |
IDA
IDA: Inferred from direct assay
|
22952693 | GOA |
| involved in epithelial cell differentiation |
IEP
IEP: Inferred from expression pattern
|
21492153 | GOA |
| involved in proteolysis |
IDA
IDA: Inferred from direct assay
|
7890620 | GOA |
| involved in proteolysis involved in protein catabolic process |
IDA
IDA: Inferred from direct assay
|
22952693 | GOA |
| Cellular Component GO Annotation | Evidence | References | Source |
|---|---|---|---|
| located in extracellular space |
IDA
IDA: Inferred from direct assay
|
22952693 | GOA |
| located in lysosome |
IDA
IDA: Inferred from direct assay
|
1837142 | GOA |
| part of peptidase inhibitor complex |
IPI
IPI: Inferred from physical interaction
|
20860624 | GOA |
| located in perinuclear region of cytoplasm |
IDA
IDA: Inferred from direct assay
|
15614436 | GOA |
CTSB Protein Structure
Propeptide_C1: Peptidase family C1 propeptide (26 - 66)
Peptidase_C1: Papain family cysteine protease (80 - 328)
- 0
- 100
- 200
- 300
- 339 a.a.
| Protein Preferred Names | Protein Names | |
|---|---|---|
|
cathepsin B |
|
|
CTSB Protein-protein interaction Information
|
Type
|
Protein Name | Protein ID | Interactor | Interactor Species | Interactor ID | Detection Method | References |
|---|---|---|---|---|---|---|---|
|
Intra
|
CTSB | P07858 | AMBP | Homo sapiens | P02760 | 16364318 | |
|
Intra
|
CTSB | P07858 | AMBP | Homo sapiens | P02760 | 16364318 | |
|
Intra
|
CTSB | P07858 | AMBP | Homo sapiens | P02760 | 16364318 | |
|
Intra
|
CTSB | P07858 | CSTA | Homo sapiens | P01040 | 20860624 | |
|
Intra
|
CTSB | P07858 | ADAMTSL4 | Homo sapiens | Q6UY14 | 16364318 | |
|
Intra
|
CTSB | P07858 | ADAMTSL4 | Homo sapiens | Q6UY14 | 16364318 | |
|
Intra
|
CTSB | P07858 | MLH1 | Homo sapiens | P40692 | 20706999 | |
|
Intra
|
CTSB | P07858 | MLH1 | Homo sapiens | P40692 | 20706999 | |
|
Intra
|
CTSB | P07858 | SPHK1 | Homo sapiens | Q9NYA1 | 17064696 |
Recombinant CTSB Proteins
| Cat. No. | Product Name | Accession | Purity |
|---|---|---|---|
| HY-P78682 | Cathepsin B Protein, Human (L26V, HEK293, His) | P07858 (R18-I339, L26V) | ≥ 95%, as determined by reducing SDS-PAGE. |
CTSB Antibodies
| Cat. No. | Product Name | Application | Reactivity |
|---|---|---|---|
| HY-P80383 | Cathepsin B Antibody (YA551) | WB, ICC/IF, IHC-P | Human |
Related Diseases
| Diseases | Alias | |
|---|---|---|
| Lung Cancer |
|
|
| Adenocarcinoma |
|
|
| Severe Acute Respiratory Syndrome |
|
|
| Pancreatitis |
|
|
| Neuronal Ceroid Lipofuscinosis |
|
|
| Pelvic Inflammatory Disease |
|
|
| Prostate Cancer |
|
|
| Dementia |
|
|
| Keratolytic Winter Erythema |
|
|
| Gingival Overgrowth |
|
|
| Laryngostenosis |
|
|
| Alzheimer Disease, Familial, 1 |
|
|
| Mucopolysaccharidosis-Plus Syndrome |
|
|
| Pneumonia |
|
|
| Fascioliasis |
|
|
| Type 2 Diabetes Mellitus |
|
|
| Giardiasis |
|
|
| Tinea Favosa |
|
|
| Phosphatase, Acid, Of Tissues |
|
|
| Tropical Calcific Pancreatitis |
|
|
| Ebola Hemorrhagic Fever |
|
|
| Progressive Myoclonus Epilepsy |
|
|
| Lung Benign Neoplasm |
|
|
| Glioblastoma |
|
|
| Diamond-Blackfan Anemia 20 |
|
|
| Cerebral Amyloid Angiopathy, Cst3-Related |
|
|
| Unverricht-Lundborg Syndrome |
|
|
| Mucolipidosis Ii Alpha/Beta |
|
|
| Breast Cancer |
|
|
| Serum Amyloid A Amyloidosis |
|
|
| Clonorchiasis |
|
|
| Acute Necrotizing Pancreatitis |
|
|
| Annular Erythema |
|
|
| Amyloidosis |
|
|
| Ovarian Cancer |
|
|
| Bone Giant Cell Tumor |
|
|
| Ceroid Lipofuscinosis, Neuronal, 10 |
|
|
| Fibrosarcoma |
|
|
| Lung Cancer Susceptibility 3 |
|
|
| Meningioma, Familial |
|
|
| Cercarial Dermatitis |
|
|
| Melanoma |
|
|
| Anaplastic Astrocytoma |
|
|
| Colorectal Cancer |
|
|
| Occlusion Of Gallbladder |
|
|
| Gastric Cancer |
|
|
| Nervous System Disease |
|
|
| Lysosomal Storage Disease |
|
|
| Amyotrophic Lateral Sclerosis 1 |
|
|
| Benign Meningioma |
|
Orthologs Information
| Species | Symbol | Source | ID |
|---|---|---|---|
| Canis familiaris | CTSB | VGNC | VGNC:39709 |
| Macaca mulatta | CTSB | VGNC | VGNC:71552 |
| Felis catus | CTSB | VGNC | VGNC:61265 |
| Rattus norvegicus | CTSB | RGD | RGD:621509 |
| Mus musculus | CTSB | MGD | MGI:88561 |
| Bos taurus | CTSB | VGNC | VGNC:27813 |
| Others | CTSB | NCBI |