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Cystatin C / CST3 Protein, Antibody, ELISA Kit, cDNA Clone

Expression host: Human Cells
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10439-HNAH-20
10439-HNAH-10
20 µg / $298
10 µg / $178
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Description: Active
Expression host: Human Cells
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10439-H08H-10
10439-H08H-20
10 µg / $178
20 µg / $298
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Description: Active
Expression host: Human Cells
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50239-M08H-10
50239-M08H-20
10 µg / $178
20 µg / $298
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Expression host: Human Cells
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80040-R08H-10
80040-R08H-20
10 µg / $178
20 µg / $298
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Cystatin C / CST3 Related Areas

Cystatin C / CST3 Related Pathways

Cystatin C / CST3 Related Product

    Cystatin C / CST3 Summary & Protein Information

    Cystatin C / CST3 Background

    Gene 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 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 the most abundant extracellular inhibitor of cysteine proteases, which is found in high concentrations in biological fluids and is expressed in virtually all organs of the body. A mutation in this gene has been associated with amyloid angiopathy. Expression of this protein in vascular wall smooth muscle cells is severely reduced in both atherosclerotic and aneurysmal aortic lesions, establishing its role in vascular disease.
    General information above from NCBI
    Subunit structure: Homodimer.
    Subcellular location: Secreted.
    Tissue specificity: Expressed in submandibular and sublingual saliva but not in parotid saliva (at protein level). Expressed in various body fluids, such as the cerebrospinal fluid and plasma. Expressed in highest levels in the epididymis, vas deferens, brain, thymus, and ovary and the lowest in the submandibular gland.
    Post-translational: 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.
    Involvement in disease: Amyloidosis 6 (AMYL6) [MIM:105150]: 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. Note=The disease is caused by mutations affecting the gene represented in this entry.
    Age-related macular degeneration 11 (ARMD11) [MIM:611953]: 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. Note=Disease susceptibility is associated with variations affecting the gene represented in this entry.
    Sequence similarity: Belongs to the cystatin family.C
    General information above from UniProt

    Cystatin C, also known as Cystatin-3 (CST3) is a secreted type 2 cysteine protease inhibitor synthesized in all nucleated cells, has been proposed as a replacement for serum creatinine for the assessment of renal function, particularly to detect small reductions in glomerular filtration rate. The mature, active form of human cystatin C is a single non-glycosylated polypeptide chain consisting of 120 amino acid residues, with a molecular mass of 13,343-13,359 Da, and containing four characteristic disulfide-paired cysteine residues. Cystatin C is a low-molecular-weight protein which has been proposed as a marker of renal function that could replace creatinine. Indeed, the concentration of Cystatin C is mainly determined by glomerular filtration and is particularly of interest in clinical settings where the relationship between creatinine production and muscle mass impairs the clinical performance of creatinine. Since the last decade, numerous studies have evaluated its potential use in measuring renal function in various populations. More recently, other potential developments for its clinical use have emerged. In almost all the clinical studies, Cystatin C demonstrated a better diagnostic accuracy than serum creatinine in discriminating normal from impaired kidney function, but controversial results have been obtained by comparing this protein with other indices of kidney disease, especially serum creatinine-based equations, such as early atherosclerosis, Alzheimer's dementia, vascular aneurysms, hyperhomocysteinaemia and other neurodegenerative diseases. Cystatin C could be a useful clinical tool to identify HIV-infected persons. In addition, its expression is up-regulated in malignance of certain tumor progression.

    Cystatin C / CST3 Alternative Name

    Cystatin C / CST3 Related Studies

  • Mares J, et al. (2003) Use of cystatin C determination in clinical diagnostics. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub. 147(2): 177-80.
  • Mussap M, et al. (2004) Biochemistry and clinical role of human cystatin C. Crit Rev Clin Lab Sci. 41(5-6): 467-550.
  • Sronie-Vivien S, et al. (2008) Cystatin C: current position and future prospects. Clin Chem Lab Med. 46(12): 1664-86.
  • Taglieri N, et al. (2009) Cystatin C and cardiovascular risk. Clin Chem. 55(11): 1932-43.
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