Anti-Cathepsin F/CTSF Antibody Picoband® Biotin Conjugated

Cathepsin F is a protein that in humans is encoded by the CTSF gene. Cathepsins are papain family cysteine proteinases that represent a major component of the lysosomal proteolytic system. Cathepsins generally contain a signal sequence, followed by a propeptide and then a catalytically active mature region. The very long (251 amino acid residues) proregion of the cathepsin F precursor contains a C-terminal domain similar to the pro-segment of cathepsin L-like enzymes, a 50-residue flexible linker peptide, and an N-terminal domain predicted to adopt a cystatin-like fold. The cathepsin F proregion is unique within the papain family cysteine proteases in that it contains this additional N-terminal segment predicted to share structural similarities with cysteine protease inhibitors of the cystatin superfamily. This cystatin-like domain contains some of the elements known to be important for inhibitory activity. CTSF encodes a predicted protein of 484 amino acids which contains a 19 residue signal peptide. Cathepsin F contains five potential N-glycosylation sites, and it may be targeted to the endosomal/lysosomal compartment via the mannose 6-phosphate receptor pathway. The cathepsin F gene is ubiquitously expressed, and it maps to chromosome 11q13, close to the gene encoding cathepsin W.

A synthetic peptide corresponding to a sequence in the middle region of human Cathepsin F/CTSF, which shares 69.6% amino acid (aa) sequence identity with both mouse Cathepsin F/CTSF.

1. Di Fabio, R., Moro, F., Pestillo, L., Meschini, M. C., Pezzini, F., Doccini, S., Casali, C., Pierelli, F., Simonati, A., Santorelli, F. M. Pseudo-dominant inheritance of a novel CTSF mutation associated with type B Kufs disease. Neurology 83: 1769-1770, 2014. 2. Nagler, D. K., Sulea, T., Menard, R. Full-length cDNA of human cathepsin F predicts the presence of a cystatin domain at the N-terminus of the cysteine protease zymogen. Biochem. Biophys. Res. Commun. 257: 313-318, 1999. 3. Santamaria, I., Velasco, G., Pendas, A. M., Paz, A., Lopez-Otin, C. Molecular cloning and structural and functional characterization of human cathepsin F, a new cysteine proteinase of the papain family with a long propeptide domain. J. Biol. Chem. 274: 13800-13809, 1999.