Cytokeratin 8 Rabbit Polyclonal Antibody (ER1803-87)

UNIPROT #

P05787

PROTEIN NAME

Cytokeratin 8

SYNONYMS

CARD2 antibody;CK 8 antibody;CK-8 antibody;CK8 antibody;CYK8 antibody;CYKER antibody;Cytokeratin endo A antibody;Cytokeratin-8 antibody;DreK8 antibody;EndoA antibody;K2C8 antibody;K2C8_HUMAN antibody;K8 antibody;Keratin 8 antibody;Keratin type II cytoskeletal 8 antibody;Keratin, type II cytoskeletal 8 antibody;Keratin-8 antibody;KO antibody;Krt 2.8 antibody;KRT8 antibody;MGC118110 antibody;MGC174782 antibody;MGC53564 antibody;MGC85764 antibody;sb:cb186 antibody;Type-II keratin Kb8 antibody

SEQUENCE SIMILARITIES

Belongs to the intermediate filament family.

TISSUE SPECIFICITY

Observed in muscle fibers accumulating in the costameres of myoplasm at the sarcolemma membrane in structures that contain dystrophin and spectrin. Expressed in gingival mucosa and hard palate of the oral cavity.

POST-TRANSLATIONAL MODIFICATION

Phosphorylation on serine residues is enhanced during EGF stimulation and mitosis. Ser-74 phosphorylation plays an important role in keratin filament reorganization.; O-glycosylated. O-GlcNAcylation at multiple sites increases solubility, and decreases stability by inducing proteasomal degradation.; O-glycosylated (O-GlcNAcylated), in a cell cycle-dependent manner.

SUBCELLULAR LOCATION

Cytoplasm. Nucleus.

FUNCTION

Cytokeratins comprise a diverse group of intermediate filament proteins (IFPs) that are expressed as pairs in both keratinized and non-keratinized epithelial tissue. Cytokeratins play a critical role in differentiation and tissue specialization and function to maintain the overall structural integrity of epithelial cells. They have been found to be useful markers of tissue differentiation, which is directly applicable to the characterization of malignant tumors. Cytokeratin 8 expression is seen in epithelium and epithelium-derived tumors. The Cytokeratin 8 and 18 pair are normally expressed in simple epithelia, but not in stratified epithelial cells. Research indicates that squamous cell carcinomas derived from stratified epithelia show abnormal expression of Cytokeratin 8 and 18, although it is not known whether these proteins contribute to the malignant phenotype of the cells. Expression of Cytokeratin 8 and 18 in oral squamous cell carcinomas is an independent prognostic marker that indicates a poor prognosis. Cytokeratin 8 expression correlates with malignancy in leukoplakia and carcinomas of the head and neck; it is expressed in all non-small-cell lung cancers. Cytokeratin 8 has been shown to possess extracellular epitopes on tumor cells, which may represent valuable targets for therapy.