Protein Summary
Thiol protease inhibitor. The cystatin superfamily encompasses proteins that contain multiple cystatin-like sequences. Some of the members are active cysteine protease inhibitors, while others have lost or perhaps never acquired this inhibitory activity. There are three inhibitory families in the superfamily, including the type 1 cystatins (stefins), type 2 cystatins and the kininogens. The type 2 cystatin proteins are a class of cysteine proteinase inhibitors found in a variety of human fluids and secretions, where they appear to provide protective functions. The cystatin locus on chromosome 20 contains the majority of the type 2 cystatin genes and pseudogenes. This gene is located in the cystatin locus and encodes a secreted thiol protease inhibitor found at high levels in saliva, tears and seminal plasma. [provided by RefSeq, Jul 2008]
Protein Classes
IDG Development Level Summary
These are targets about which virtually nothing is known. They do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:
Pubmed score: 67.55 (req: < 5)
Gene RIFs: 9 (req: <= 3)
Antibodies: 249 (req: <= 50)
These targets do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:
Pubmed score: 67.55 (req: >= 5)
Gene RIFs: 9 (req: > 3)
Antibodies: 249 (req: > 50)
- OR - satisfy the following criterion:
Gene Ontology Terms: 2
Target has at least one ChEMBL compound with an activity cutoff of < 30 nM - AND - satisfies the preceding conditions
Active Ligand: 0
Target has at least one approved drug - AND - satisfies the preceding conditions
Active Drug: 0