Protein Summary
Performs a specialized role during sperm development and maturation. 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. 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 protein similar to type 2 cystatins. The encoded protein exhibits highly tissue-specific expression in the reproductive tract, suggesting implicit roles in reproduction. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2013]
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: 142.52 (req: < 5)
Gene RIFs: 3 (req: <= 3)
Antibodies: 214 (req: <= 50)
These targets do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:
Pubmed score: 142.52 (req: >= 5)
Gene RIFs: 3 (req: > 3)
Antibodies: 214 (req: > 50)
- OR - satisfy the following criterion:
Gene Ontology Term: 1
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