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Separation and chemical differentiation of α and β subunits in yeast phosphofructokinase
Author(s) -
Tijane M'hammed N.,
Chaffotte Alain F.,
Yon Jeannine M.,
Laurent Michel
Publication year - 1982
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(82)80822-3
Subject(s) - phosphofructokinase , yeast , amino acid , biochemistry , protein subunit , chemistry , peptide , ion chromatography , peptide mapping , enzyme , biology , peptide sequence , glycolysis , gene
The two types of subunits α and β constitutive of yeast phosphofructokinase have been separated by ion‐exchange chromatography under denaturating conditions. Amino acid analysis and peptide mapping were performed on the isolated subunits. The frequence of most of the amino acids significantly differs between the two types of polypeptide chains. Moreover, tryptic peptide maps of α and β subunits are clearly not superimposable. These chemical differences seem sufficient to account for the distinct catalytic and regulatory functions of β and α subunits in the yeast phosphofructokinase reaction.