Transforming growth factor beta isoform 2-specific high affinity binding to native alpha 2-macroglobulin. Chimeras identify a sequence that determines affinity for native but not activated alpha 2-macroglobulin.
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چکیده
منابع مشابه
Specific covalent binding of platelet-derived growth factor to human plasma alpha 2-macroglobulin.
Attempts to measure the platelet-derived growth factor (PDGF) in human plasma resulted in the discovery of a specific plasma binding protein. The 125I-labeled PDGF (125I-PDGF)-plasma binding protein complex retained mitogenic activity but lost reactivity against rabbit anti-PDGF antiserum. Copurification of the plasma binding protein and alpha 2-macroglobulin (alpha 2M) in human plasma, the for...
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Activation of plasma kallikrein arginine esterase activity by kaolin resulted in peak activity at 1 min of incubation and a 50% reduction in activity at 5 min in normal plasma, and 30% reduction in the plasma of patients with hereditary angioneurotic edema who lacked the C1 inactivator. The peak esterolytic activity was inhibited by soybean trypsin inhibitor whereas the 5 min activity was resis...
متن کاملAlpha-2-Macroglobulin: A Physiological Guardian
Alpha macroglobulins are large glycoproteins which are present in the body fluids of both invertebrates and vertebrates. Alpha-2macroglobulin (a2M), a key member of alpha macroglobulin superfamily, is a high-molecular weight homotetrameric glycoprotein. a2Mhasmany diversified and complex functions, but it is primarily known by its ability to inhibit a broad spectrumof proteaseswithout the direc...
متن کاملHigh Serum Alpha-2-Macroglobulin Level in Patients with Osteonecrosis of the Femoral Head
Background: Diagnosis of osteonecrosis of the femoral head (ONFH) is complicated due to the lack of reliable serum biomarkers. Up-regulation of alpha-2-macroglobulin (A2M) gene has been reported in glucocorticoid-induced ANFH rat model. This study aimed to investigate whether the serum level of alpha-2-macroglobulin (A2M) can be used for ONFH diagnosis. Methods: Serum protein capillary elect...
متن کاملThe human alpha 2-macroglobulin receptor: identification of a 420-kD cell surface glycoprotein specific for the activated conformation of alpha 2-macroglobulin
Ligand affinity chromatography was used to purify a cell surface alpha 2-macroglobulin (alpha 2M) receptor. Detergent extracts of human placenta were applied to an affinity matrix consisting of alpha 2M, previously reacted with methylamine, coupled to Sepharose. Elution with EDTA specifically released polypeptides with apparent molecular masses of 420 and 39 kD. In some preparations, small amou...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1994
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)43827-6