Porcine pancreatic α-amylase inhibition by the kidney bean (Phaseolus vulgaris) inhibitor (α-AI1) and structural changes in the α-amylase inhibitor complex
نویسندگان
چکیده
منابع مشابه
Heterologous expression of an α-amylase inhibitor from common bean (Phaseolus vulgaris) in Kluyveromyces lactis and Saccharomyces cerevisiae
BACKGROUND Phaseolamin or α-amylase inhibitor 1 (αAI) is a glycoprotein from common beans (Phaseolus vulgaris L.) that inhibits some insect and mammalian α-amylases. Several clinical studies support the beneficial use of bean αAI for control of diabetes and obesity. Commercial extracts of P. vulgaris are available but their efficacy is still under question, mainly because some of these extracts...
متن کاملActivity changes in cranberry bean (Phaseolus vulgaris) alpha-amylase inhibitor by chemical modification and enzymatic digestion.
An alpha-amylase inhibitor was prepared from cranberry bean (Phaseolus vulgaris). The alpha-amylase inhibitor was composed of three different subunits not linked by disulfide bridges and only one of them contained carbohydrate. Although the inhibitor was stable at pH 3 to 7, it was heat labile at pH 3 and 5. Chemical modification of the amino groups and the guanido groups in cranberry bean alph...
متن کاملPurification and properties of phaseolamin, an inhibitor of alpha-amylase, from the kidney bean, Phaseolus vulgaris.
Kidney beans, Phaseolus vulgaris, contain a proteinaceous inhibitor of alpha-amylase, which we have named phaseolamin. The inhibitor has been purified to homogeneity by conventional protein fractionation methods involving heat treatment, dialysis, and chromatography on DEAE-cellulose, Sephadex G-100, and CM-cellulose. Phaseolamin is specific for animal alpha-amylases, having no activity towards...
متن کاملBioactivity-Guided Separation of an α-Amylase Inhibitor Flavonoid from Salvia virgata
It is now believed that the inhibition of carbohydrate hydrolyzing enzymes (CHEs) in the digestive tract can significantly prolong the overall carbohydrate digestion time and decrease the postprandial hyperglycemia after a meal. Therefore, inhibitors of CHEs can be useful therapeutic approaches in the management of diabetes mellitus, especially in the type 2, and complications associated with t...
متن کاملMutants of common bean alpha-amylase inhibitor-2 as an approach to investigate binding specificity to alpha-amylases
Despite the presence of a family of defense proteins, Phaseolus vulgaris can be attacked by bruchid insects resulting in serious damage to stored grains. The two distinct active forms of α-amylase inhibitors, α-AI1 and α-AI2, in P. vulgaris show different specificity toward α-amylases. Zabrotes subfasciatus α-amylase is inhibited by α-AI2 but not by α-AI1. In contrast, porcine α-amylase is inhi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics
سال: 2004
ISSN: 1570-9639
DOI: 10.1016/j.bbapap.2003.11.001