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Merck
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重要文件

82526

Sigma-Aldrich

Protein A soluble from Staphylococcus aureus (Cowan strain)

powder, white

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About This Item

MDL號碼:
分類程式碼代碼:
12352203
NACRES:
NA.46
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生物源

Staphylococcus aureus

共軛

unconjugated

形狀

powder

物種活性

mouse, cat, monkey, pig, dog, human, rabbit, guinea pig

技術

ELISA: suitable
immunohistochemistry: suitable
immunoprecipitation (IP): suitable
western blot: suitable

顏色

white

容量

~10 mg/mg binding capacity (human IgG)

溶解度

H2O: 1 mg/mL, clear, colorless

UniProt登錄號

儲存溫度

2-8°C

基因資訊

Staphylococcus aureus subsp. aureus NCTC 8325 ... SAOUHSC_00069(3919448)

相關類別

一般說明

Protein A is a highly stable cell surface receptor produced by several strains of Staphylococcus aureus. This protein is capable of binding to the Fc portion of immunoglobulins, especially IgGs, from a large number of species. One protein A molecule has been shown to bind at least 2 molecules of IgG simultaneously. The IgG binding domain of Protein A consists of three anti-parallel alpha-helicies, the third of which is disrupted when the protein is complexed with the Fc region of the immunoglobulins. Protein A will bind the Fc portion of human IgG subclasses, IgM, IgA and IgE; and mouse IgG1 (weakly), IgG2a, and IgG2b. Protein A also associates with IgGs from other species, including monkey, rabbit, pig, guinea pig, dog, and cat.
Protein A is involved in regulating anti-tumor, toxic, and carcinogenic functions. In addition to acting as an immunomodulator, it also has antifungal and antiparasitic properties.

應用

Protein A may be conjugated with various reporter molecules such as fluorescent dyes (FITC), enzyme markers (peroxidase, beta-galactosidase, alkaline phosphatase), biotin, and colloidal gold without affecting the antibody binding site on the molecule. These conjugates may be used to detect immunoglobulins using immunochemical assays such as western blotting, immunohistochemistry, and ELISA. In addition, protein A may also be immobilized on a solid supports like agarose or acrylic beads for the purification of polyclonal or monoclonal immunoglobulins. It is also routinely used for immunoprecipitation assays. Furthermore, protein A has been used for affinity chromatography and SDS-PAGE assays[1].

免責聲明

Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

儲存類別代碼

11 - Combustible Solids

水污染物質分類(WGK)

WGK 3

閃點(°F)

Not applicable

閃點(°C)

Not applicable

個人防護裝備

Eyeshields, Gloves, type N95 (US)


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The diagnosis of lipopolysaccharide-responsive beige-like-anchor-protein (LRBA) deficiency currently relies on gene sequencing approaches that do not support a timely diagnosis and clinical management. We developed a rapid and sensitive test for clinical implementation based on the detection of LRBA protein
J I Flock et al.
The EMBO journal, 6(8), 2351-2357 (1987-08-01)
The gene encoding the fibronectin-binding protein (FNBP) from Staphylococcus aureus strain 8325-4 was isolated from a gene bank in pBR322. The original clone, containing a 6.5-kb insert, gave a functional product present in the periplasm of Escherichia coli. Analysis of

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