NCBI and Uniprot Product Information
NCBI Description
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. [provided by RefSeq, Jul 2008]
Uniprot Description
CTSF: Thiol protease which is believed to participate in intracellular degradation and turnover of proteins. Has also been implicated in tumor invasion and metastasis. Belongs to the peptidase C1 family.
Protein type: EC 3.4.22.41; Protease
Chromosomal Location of Human Ortholog: 11q13
Cellular Component: extracellular space; lysosomal lumen; lysosome
Molecular Function: cysteine-type endopeptidase activity
Biological Process: antigen processing and presentation of exogenous peptide antigen via MHC class II; proteolysis; proteolysis involved in cellular protein catabolic process
Disease: Ceroid Lipofuscinosis, Neuronal, 13
Research Articles on CTSF
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Product Notes
The CTSF ctsf (Catalog #AAA719379) is a Recombinant Protein produced from E Coli and is intended for research purposes only. The product is available for immediate purchase. The immunogen sequence is 273-484aa; partial. The amino acid sequence is listed below: PEWDWRSKGA VTKVKDQGMC GSCWAFSVTG NVEGQWFLNQ GTLLSLSEQE LLDCDKMDKA CMGGLPSNAY SAIKNLGGLE TEDDYSYQGH MQSCNFSAEK AKVYINDSVE LSQNEQKLAA WLAKRGPISV AINAFGMQFY RHGISRPLRP LCSPWLIDHA VLLVGYGNRS DVPFWAIKNS WGTDWGEKGY YYLHRGSGAC GVNTMASSAV VD . It is sometimes possible for the material contained within the vial of "Cathepsin F, Recombinant Protein" to become dispersed throughout the inside of the vial, particularly around the seal of said vial, during shipment and storage. We always suggest centrifuging these vials to consolidate all of the liquid away from the lid and to the bottom of the vial prior to opening. Please be advised that certain products may require dry ice for shipping and that, if this is the case, an additional dry ice fee may also be required.Precautions
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