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Key Specifications Table
| Species Reactivity | Key Applications | Host | Format | Antibody Type |
|---|---|---|---|---|
| H, M, R | WB, IH(P) | Rb | Affinity Purified | Polyclonal Antibody |
| Description | |
|---|---|
| Catalogue Number | ABC20 |
| Description | Anti-Cystatin-C Antibody |
| Alternate Names |
|
| Background Information | Cystatin-C is a cysteine protease inhibitor in mammals, which is essential in protein degradation and keeping an equilibrium between inhibitors and proteases. It is thought to be a better marker for renal dysfunction and potential kidney injury than creatinine. Recently, Cystatin-C has been implicated in primary hypertension and may be a novel marker in patients. Cystatin-C has also been implicated in oxidative stress-induced apoptosis of CNS neurons and has been shown to inhibit amyloid-beta deposition in Alzheimers disease models. |
| Product Information | |
|---|---|
| Format | Affinity Purified |
| Control |
|
| Presentation | Purified rabbit polyclonal in buffer containing 0.1 M Tris-Glycine (pH 7.4), 150 mM NaCl with 0.05% sodium azide. |
| Quality Level | MQ100 |
| Applications | |
|---|---|
| Application | Anti-Cystatin-C Antibody detects level of Cystatin-C & has been published & validated for use in WB, IH(P). |
| Key Applications |
|
| Application Notes | Immunohistochemistry (paraffin) Analysis: A 1:1000 dilution of a previous lot detected Cystatin-C in purkinje cells of normal rat cerebellum, neurons of normal rat frontal lobe, and neurons in normal rat midbrain. |
| Biological Information | |
|---|---|
| Immunogen | KLH-conjugated linear peptide corresponding to human Cystatin-C. |
| Concentration | Please refer to the Certificate of Analysis for the lot-specific concentration. |
| Host | Rabbit |
| Species Reactivity |
|
| Antibody Type | Polyclonal Antibody |
| Entrez Gene Number |
|
| Entrez 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. [provided by RefSeq]. |
| Gene Symbol |
|
| Purification Method | Affinity Purfied |
| UniProt Number |
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| UniProt Summary | FUNCTION: As an inhibitor of cysteine proteinases, this protein is thought to serve an important physiological role as a local regulator of this enzyme activity. 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. PTM: 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: Defects in CST3 are the cause of amyloidosis type 6 (AMYL6) [MIM:105150]; also known as hereditary cerebral hemorrhage with amyloidosis (HCHWA), cerebral amyloid angiopathy (CAA) or cerebroarterial amyloidosis Icelandic type. AMYL6 is 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. Genetic variations in CST3 are associated with age-related macular degeneration type 11 (ARMD11) [MIM:611953]. ARMD is 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. MISCELLANEOUS: Potential cerebrospinal fluid marker for the diagnosis of Creutzfeldt-Jakob disease. SEQUENCE SIMILARITIES: Belongs to the cystatin family. MASS SPECTROMETRY: Molecular mass is 13334.5829±0.0140 Da from positions 27 - 146. Determined by ESI. |
| Molecular Weight | ~14 kDa observed. An uncharacterized band may appear at ~62 kDa in some lysates. |
| Product Usage Statements | |
|---|---|
| Quality Assurance | Evaluated by Western Blot in human kidney tissue lysate. Western Blot Analysis: 0.5 µg/mL of this antibody detected Cystatin-C in 10 µg of human kidney tissue lysate. |
| Usage Statement |
|
| Storage and Shipping Information | |
|---|---|
| Storage Conditions | Stable for 1 year at 2-8°C from date of receipt. |
| Packaging Information | |
|---|---|
| Material Size | 100 µg |