Title : Evidence for similar conformational changes in alpha 2-macroglobulin on reaction with primary amines or proteolytic enzymes.

Pub. Date : 1982 Nov 1

PMID : 6186243






6 Functional Relationships(s)
Download
Sentence
Compound Name
Protein Name
Organism
1 Evidence for similar conformational changes in alpha 2-macroglobulin on reaction with primary amines or proteolytic enzymes. Amines alpha-2-macroglobulin Homo sapiens
2 Reactions of alpha(2)-macroglobulin (alpha(2)M) with primary amines (ammonium chloride, methylammonium chloride and ethylammonium chloride) or proteolytic enzymes (trypsin, chymotrypsin and thrombin) resulted in changes of the absorption, fluorescence and circular-dichroism spectra and of the sedimentation coefficient of the inhibitor. Amines alpha-2-macroglobulin Homo sapiens
3 Reactions of alpha(2)-macroglobulin (alpha(2)M) with primary amines (ammonium chloride, methylammonium chloride and ethylammonium chloride) or proteolytic enzymes (trypsin, chymotrypsin and thrombin) resulted in changes of the absorption, fluorescence and circular-dichroism spectra and of the sedimentation coefficient of the inhibitor. Amines alpha-2-macroglobulin Homo sapiens
4 All physico-chemical changes caused by the inactivation of alpha(2)M by the amines were identical with, or highly similar to, those induced by the formation of the enzyme-inhibitor complexes. Amines alpha-2-macroglobulin Homo sapiens
5 The frictional ratio, calculated from the increase in sedimentation coefficient, decreased from 1.67 for untreated alpha(2)M to 1.57 for the amine- or proteinase-treated inhibitor. Amines alpha-2-macroglobulin Homo sapiens
6 The circular-dichroism analyses indicated that the reaction of alpha(2)M with either amines or proteinases is accompanied by a loss of the small amount (about 5%) of alpha-helix of the untreated protein. Amines alpha-2-macroglobulin Homo sapiens