Keratin, type II cytoskeletal 7 is a protein encoded by the KRT7 gene in humans. It is also known as cytokeratin-7 (CK-7), keratin-7 (K7), sarcolectin (SCL) and K2C7. Keratin 7 is a type II keratin and is a member of the keratin gene family. It is found on chromosome 12. It is specifically expressed in the simple epithelia lining of the internal organs and in the gland ducts as well as blood vessels.
Monoclonal anti-Cytokeratin Peptide 7 (mouse IgG1 isotype) is derived from the hybridoma produced the fusion of mouse myeloma cells and splenocytes of an immunized mouse. Cytokeratins are the intermediate filaments of endocrine cells. These proteins belongs to the intermediate filament (10 nm) superfamily of cytoskeletal proteins. Cytokeratin 7 (CK 7/ KRT7) is a low molecular weight cytokeratin. It is present in epithelial tissues of lung, breast and ovary.
Specificity
The antibody reacts specifically with most simple epithelia but shows no reaction with epithelial cells in the intestine or in the stomach.
Immunogen
cytoskeletal preparation of the RT4 human bladder carcinoma cell line.
Application
Monoclonal Anti-Cytokeratin Peptide 7 antibody produced in mouse has been used in:
immunohistochemical staining
western blotting
immunohistochemistry
immunofluorescence.
Biochem/physiol Actions
Cytokeratins may play an important role in transhepatic transport and canalicular secretion. Cytokeratin 7 (CK 7/ KRT7) only stains bile ducts in normal liver, hence it is considered as “bile duct keratin”. CK 7 is widely used in surgical pathology. It acts as a specific marker for mammary and extramammary Paget′s disease.
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Autologous oral mucosal epithelial cell sheets have been used for treating epithelial defects such as cornea and esophagus. The cell source of patients' oral mucosal epithelial cell sheet should be examined in normality because it has individual difference. In this
Brush biopsy of human oral mucosal epithelial cells as a quality control of the cell source for fabrication of transplantable epithelial cell sheets for regenerative medicine
Cytogenetics and cell genetics, 57(1), 33-38 (1991-01-01)
We have localized the genes which encode the human type II epidermal keratins K5, K6a, and K6b and the simple epithelial keratin K7 (KRT5, KRT6A, KRT6B, and KRT7, respectively) to chromosome 12 using Southern blot analysis of somatic cell hybrids.
Role of cytokeratin intermediate filaments in transhepatic transport and canalicular secretion
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