CST3

CST3 (Cystatin C) is a Protein Coding gene. Diseases associated with CST3 include Cerebral Amyloid Angiopathy, Cst3-Related and Macular Degeneration, Age-Related, 11. Among its related pathways are Innate Immune System and Activated PKN1 stimulates transcription of AR (androgen receptor) regulated genes KLK2 and KLK3. Gene Ontology (GO) annotations related to this gene include identical protein binding and endopeptidase inhibitor activity. An important paralog of this gene is CST2.

Cystatin C

Cystatin C; Neuroendocrine Basic Polypeptide; Post-Gamma-Globulin; Gamma-Trace; Cystatin C (Amyloid Angiopathy And Cerebral Hemorrhage); Epididymis Secretory Protein Li 2; BA218C14.4 (Cystatin C);

As an inhibitor of cysteine proteinases, this protein is thought to serve an important physiological role as a local regulator of this enzyme activity.

Amyloid fibril formation Source: Reactome
Cellular protein metabolic process Source: Reactome
Defense response Source: BHF-UCL
Negative regulation of blood vessel remodeling Source: BHF-UCL
Negative regulation of collagen catabolic process Source: BHF-UCL
Negative regulation of elastin catabolic process Source: BHF-UCL
Negative regulation of extracellular matrix disassembly Source: BHF-UCL
Negative regulation of peptidase activity Source: ARUK-UCL
Negative regulation of proteolysis Source: UniProtKB
Neutrophil degranulation Source: Reactome
Post-translational protein modification Source: Reactome
Regulation of tissue remodeling Source: BHF-UCL
Supramolecular fiber organization Source: BHF-UCL

Secreted

Amyloidosis 6 (AMYL6):
A hereditary generalized amyloidosis due to cystatin C amyloid deposition. Cystatin C amyloid accumulates in the walls of arteries, arterioles, and sometimes capillaries and veins of the brain, and in various organs including lymphoid tissue, spleen, salivary glands, and seminal vesicles. Amyloid deposition in the cerebral vessels results in cerebral amyloid angiopathy, cerebral hemorrhage and premature stroke. Cystatin C levels in the cerebrospinal fluid are abnormally low.
Macular degeneration, age-related, 11 (ARMD11):
A form of age-related macular degeneration, a multifactorial eye disease and the most common cause of irreversible vision loss in the developed world. In most patients, the disease is manifest as ophthalmoscopically visible yellowish accumulations of protein and lipid that lie beneath the retinal pigment epithelium and within an elastin-containing structure known as Bruch membrane.

The Thr-25 variant is O-glycosylated with a core 1 or possibly core 8 glycan. The signal peptide of the O-glycosylated Thr-25 variant is cleaved between Ala-20 and Val-21.