CSTA

Entrez Summary: 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 kininogens. This gene encodes a stefin that functions as a cysteine protease inhibitor, forming tight complexes with papain and the cathepsins B, H, and L. The protein is one of the precursor proteins of cornified cell envelope in keratinocytes and plays a role in epidermal development and maintenance. Stefins have been proposed as prognostic and diagnostic tools for cancer. [provided by RefSeq, Jul 2008].
UniProt Summary: This is an intracellular thiol proteinase inhibitor. Has an important role in desmosome-mediated cell-cell adhesion in the lower levels of the epidermis. {ECO:0000269|PubMed:21944047}.

Pfam Domains GO Terms

Compound Hit Most Correlated Genes in Chemogenomics Tissues where Essential in the Avana Dataset (DepMap 20Q1)

Global Fraction of Cell Lines Where Essential: 0/739

Tissue	Fraction Of Cell Lines Where Essential
1290807.0	0/1
909776.0	0/1
bile duct	0/28
blood	0/28
bone	0/26
breast	0/33
central nervous system	0/56
cervix	0/4
colorectal	0/17
esophagus	0/13
fibroblast	0/1
gastric	0/16
kidney	0/21
liver	0/20
lung	0/75
lymphocyte	0/16
ovary	0/26
pancreas	0/24
peripheral nervous system	0/16
plasma cell	0/15
prostate	0/1
skin	0/24
soft tissue	0/9
thyroid	0/2
upper aerodigestive	0/22
urinary tract	0/29
uterus	0/5

Expression Distribution

cysteine-type endopeptidase inhibitor activity
peptide cross-linking
cornified envelope
protease binding
cornification
keratinization
negative regulation of endopeptidase activity
negative regulation of peptidase activity
keratinocyte differentiation
epidermal cell differentiation
negative regulation of proteolysis
skin development
epidermis development
regulation of endopeptidase activity
regulation of peptidase activity
negative regulation of hydrolase activity
cell-cell adhesion
epithelial cell differentiation
regulation of proteolysis
negative regulation of catalytic activity
cell adhesion
biological adhesion
negative regulation of cellular protein metabolic process
programmed cell death
cell death
negative regulation of protein metabolic process
epithelium development
negative regulation of molecular function
regulation of hydrolase activity
extracellular space
tissue development