Anti-Caspase-14/CASP14 Antibody Picoband®

Caspase 14 is an enzyme that in humans is encoded by the CASP14 gene. CASP14 belongs the evolutionarily conserved caspase family. CASP14 was assigned to chromosome 19p13.1. Using Northern blot and semiquantitative RT-PCR analyses, it was showed that CASP14 was transcriptionally upregulated during maintenance of confluent cultures of human epidermal keratinocytes. The expression and processing of this caspase may be involved in keratinocyte terminal differentiation, which is important for the formation of the skin barrier. Caspase 14 seems to play a role in keratinocyte differentiation and cornification and probably regulates maturation of the epidermis by proteolytically processing filaggrin.

Caspase-14; CASP-14;3.4.22.-; Caspase-14 subunit p17, mature form; Caspase-14 subunit p10, mature form; Caspase-14 subunit p20, intermediate form; Caspase-14 subunit p8, intermediate form; CASP14

A synthetic peptide corresponding to a sequence at the C-terminus of human Caspase-14, different from the related rat and mouse sequences by four amino acids.

Expressed in keratinocytes of adult skin suprabasal layers (from spinous layers to the stratum granulosum and stratum corneum) (at protein level) . Expressed in keratinocytes of hair shaft and sebaceous glands (at protein level) . In psoriatic skin only expressed at very low levels (PubMed:11175259) . The p17/10 mature form is expressed in epidermis stratum corneum, the p20/p8 intermediate form in epidermis upper granular cells of the stratum granulosum (PubMed:22825846) . .

Non-apoptotic caspase involved in epidermal differentiation. Is the predominant caspase in epidermal stratum corneum (PubMed:15556625) . Seems to play a role in keratinocyte differentiation and is required for cornification. Regulates maturation of the epidermis by proteolytically processing filaggrin (By similarity) . In vitro has a preference for the substate [WY]-X-X-D motif and is active on the synthetic caspase substrate WEHD-ACF (PubMed:16854378, PubMed:19960512) . Involved in processing of prosaposin in the epidermis (By similarity) . May be involved in retinal pigment epithelium cell barrier function (PubMed:25121097) . Involved in DNA degradation in differentiated keratinocytes probably by cleaving DFFA/ICAD leading to liberation of DFFB/CAD (PubMed:24743736) . .

1. Denecker, G., Hoste, E., Gilbert, B., Hochepied, T., Ovaere, P., Lippens, S., Van den Broecke, C., Van Damme, P., D'Herde, K., Hachem, J.-P., Borgonie, G., Presland, R. B., Schoonjans, L., Libert, C., Vandekerckhove, J., Gevaert, K., Vandenabeele, P., Declercq, W. Caspase-14 protects against epidermal UVB photodamage and water loss. Nature Cell Biol. 9: 666-674, 2007. 2. Eckhart, L., Ban, J., Fischer, H., Tschachler, E. Caspase-14: analysis of gene structure and mRNA expression during keratinocyte differentiation. Biochem. Biophys. Res. Commun. 277: 655-659, 2000. 3. Van de Craen, M., Van Loo, G., Pype, S., Van Criekinge, W., Van den brande, I., Molemans, F., Fiers, W., Declercq, W., Vandenabeele, P. Identification of a new caspase homologue: caspase-14. Cell Death Differ. 5: 838-846, 1998.

Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.