Tbio CST1 Cystatin-SN

Protein Summary

Description

Human saliva appears to contain several cysteine proteinase inhibitors that are immunologically related to cystatin S but that differ in their specificity due to amino acid sequence differences. Cystatin SN, with a pI of 7.5, is a much better inhibitor of papain and dipeptidyl peptidase I than is cystatin S, although both inhibit ficin equally well. 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 cysteine proteinase inhibitor found in saliva, tears, urine, and seminal fluid. [provided by RefSeq, Jul 2008]

Uniprot Accession IDs

• P01037
• Q96LE6
• Q9UCQ6

Gene Name

• CST1

Ensembl ID

• ENST00000304749
• ENSP00000305731
• ENSG00000170373
• ENST00000398402
• ENSP00000381439

Knowledge Table

Most Knowledge About	Knowledge Value (0 to 1 scale)
gene perturbation	0.76
cell line	0.73
cell type or tissue	0.73
small molecule perturbation	0.51
tissue	0.44

Protein Classes

No PANTHER Classes or DTO Classes found

IDG Development Level Summary

Tdark

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: 61.24   (req: < 5)

Gene RIFs: 26   (req: <= 3)

Antibodies: 210   (req: <= 50)

Tbio

These targets do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 61.24   (req: >= 5)

Gene RIFs: 26   (req: > 3)

Antibodies: 210   (req: > 50)

- OR - satisfy the following criterion:

Gene Ontology Terms: 2

Tchem

Target has at least one ChEMBL compound with an activity cutoff of < 30 nM - AND - satisfies the preceding conditions

Active Ligand: 0

Tclin

Target has at least one approved drug - AND - satisfies the preceding conditions

Active Drug: 0