H5041
Cystatin C human
HumanKine®, ≥95% (SDS-PAGE), recombinant, expressed in HEK 293 cells, suitable for cell culture
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About This Item
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product name
Cystatin C human, recombinant, expressed in HEK 293 cells, HumanKine®, suitable for cell culture
biological source
human
Quality Level
recombinant
expressed in HEK 293 cells
assay
≥95% (SDS-PAGE)
form
lyophilized powder
potency
≤5 μM IC50
quality
endotoxin tested
mol wt
dimer 12-13 kDa (non-glycosylated)
packaging
pkg of 10 μg
storage condition
avoid repeated freeze/thaw cycles
technique(s)
cell culture | mammalian: suitable
impurities
≤1 EU/mg
UniProt accession no.
storage temp.
−20°C
Gene Information
human ... CYTC(1471)
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General description
HumanKine human Cystatin C is expressed as a non-glycosylated monomer in human HEK 293 cells. Cystatin C belongs to the cystatin superfamily. Two isoforms (pI = 7.8, 9.2) of native Cystatin C are found in human urine differentiated by the elimination of small basic peptides or amino acids from the N-terminal end of the protein. This protein is coded by a housekeeping gene, CST3 located on human chromosome 20p11.21 and is generated by nucleated cells.
Application
Cystatin C human has been used as a standard in western blot assay. It has also been used to study its effect on the endopeptidase activity of activated Trichobilharzia regenti isoform of cathepsin B1 peptidase (TrCB1).
Biochem/physiol Actions
Cystatin C is an inhibitor of cysteine proteases including cathepsin B which has been identified as the most important β-amyloid-degrading enzyme. Measurement of cystatin C in serum is replacing creatinine as an indicator of kidney function (glomerular filtration rate, GFR). Studies show its role in predicting new-onset or deteriorating cardiovascular disease. It also seems to play a role in brain disorders involving amyloid, such as Alzheimer′s disease. Cystatin C inhibits transforming growth factor β signaling in normal and cancer cells.
Physical form
Lyophilized from a 0.2 μm filtered solution of 1×PBS
Analysis Note
The inhibitory function of cystatin c on papain′s protease activity was measured by a colorimetric assay using L-BAPA as substrate. IC50 value was measured at 5 to 20 μg/mL (0.3 to 1.5 μM) with a range of 1.56 μg/mL to 50 μg/mL cystatin C in presence of 0.55 μM papain and 0.44 μM L-BAPA.
Legal Information
HumanKine is a registered trademark of Proteintech Group, Inc. and Humanzyme, Inc
Storage Class
11 - Combustible Solids
wgk_germany
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
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Jean-Charles Lafarge et al.
Biochimie, 92(11), 1580-1586 (2010-04-27)
Given the increasing prevalence of human obesity worldwide, there is an urgent need for a better understanding of the molecular mechanisms linking obesity to metabolic and cardiovascular diseases. Our knowledge is nevertheless limited regarding molecules linking adipose tissue to downstream
Assessment of glomerular filtration rate in acute and chronic settings
National Kidney Foundation Primer on Kidney Diseases, 26-32 (2014)
Can-E Tang et al.
Journal of proteome research, 9(12), 6101-6111 (2010-10-05)
The epidermal growth factor receptor (EGFR) is usually overexpressed in nasopharyngeal carcinoma (NPC) and is associated with pathogenesis of NPC. However, while EGFR-modulated intracellular proteins have been extensively studied, little is known concerning their extracellular counterparts. To identify EGFR-regulated secreted
Hana Dvořáková et al.
Frontiers in cellular and infection microbiology, 10, 66-66 (2020-03-17)
Schistosomula (the post-infective stages) of the neurotropic schistosome Trichobilharzia regenti possess multiple isoforms of cathepsin B1 peptidase (TrCB1.1-TrCB1.6) with involvement in nutrient digestion. The comparison of substrate preferences of TrCB1.1 and TrCB1.4 showed that TrCB1.4 had a very narrow substrate
Hyun Jung Chung et al.
PloS one, 10(7), e0133417-e0133417 (2015-07-18)
The high incidence of acute and chronic kidney injury due to various environmental factors such as heavy metals or chemicals has been a major problem in developing countries. However, the diagnosis of kidney injury in these areas can be more
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