Biomaterial Database

Proteolytic catabolite inactivation in Saccharomyces cerevisiae. 1989

H Holzer

Biochemisches Institut, Universität Freiburg, West Germany.

Fermentable sugars, when added to cells of Saccharomyces cerevisiae growing on a non-fermentable carbon source, cause repression of the synthesis of certain enzymes ("catabolite repression") and in addition inactivation of a smaller group of enzymes ("catabolite inactivation"). Enzymes for which "catabolite inactivation" has been observed are listed herein. In five cases, it has been shown that the mechanism of catabolite inactivation is proteolytic in nature. Our present knowledge on the conditions and the mechanisms of initiation of inactivation and the biological significance of the proteolytic inactivation is summarized for these five enzymes: cytoplasmic malate dehydrogenase, aminopeptidase I, fructose-1,6-bisphosphatase (FBPase), phosphoenolpyruvate carboxykinase and isocitrate lyase. With the exception of aminopeptidase I, these enzymes are key enzymes of gluconeogenesis in S. cerevisiae. It is obvious that gluconeogenesis is no longer necessary, if a fermentable carbon source is available.

UI	MeSH Term	Description	Entries
D007522	Isocitrate Lyase	A key enzyme in the glyoxylate cycle. It catalyzes the conversion of isocitrate to succinate and glyoxylate. EC 4.1.3.1.	Isocitrase,Isocitratase,Lyase, Isocitrate
D008291	Malate Dehydrogenase	An enzyme that catalyzes the conversion of (S)-malate and NAD+ to oxaloacetate and NADH. EC 1.1.1.37.	Malic Dehydrogenase,NAD-Malate Dehydrogenase,Dehydrogenase, Malate,Dehydrogenase, Malic,Dehydrogenase, NAD-Malate,NAD Malate Dehydrogenase
D010729	Phosphoenolpyruvate Carboxykinase (GTP)	An enzyme of the lyase class that catalyzes the conversion of GTP and oxaloacetate to GDP, phosphoenolpyruvate, and carbon dioxide. This reaction is part of gluconeogenesis in the liver. The enzyme occurs in both the mitochondria and cytosol of mammalian liver. (From Dorland, 27th ed) EC 4.1.1.32.	GTP-Dependent Phosphoenolpyruvate Carboxykinase,Carboxykinase, GTP-Dependent Phosphoenolpyruvate,GTP Dependent Phosphoenolpyruvate Carboxykinase,Phosphoenolpyruvate Carboxykinase, GTP-Dependent
D003593	Cytoplasm	The part of a cell that contains the CYTOSOL and small structures excluding the CELL NUCLEUS; MITOCHONDRIA; and large VACUOLES. (Glick, Glossary of Biochemistry and Molecular Biology, 1990)	Protoplasm,Cytoplasms,Protoplasms
D005656	Fungal Proteins	Proteins found in any species of fungus.	Fungal Gene Products,Fungal Gene Proteins,Fungal Peptides,Gene Products, Fungal,Yeast Proteins,Gene Proteins, Fungal,Peptides, Fungal,Proteins, Fungal
D005943	Gluconeogenesis	Biosynthesis of GLUCOSE from nonhexose or non-carbohydrate precursors, such as LACTATE; PYRUVATE; ALANINE; and GLYCEROL.
D005947	Glucose	A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement.	Dextrose,Anhydrous Dextrose,D-Glucose,Glucose Monohydrate,Glucose, (DL)-Isomer,Glucose, (alpha-D)-Isomer,Glucose, (beta-D)-Isomer,D Glucose,Dextrose, Anhydrous,Monohydrate, Glucose
D006597	Fructose-Bisphosphatase	An enzyme that catalyzes the conversion of D-fructose 1,6-bisphosphate and water to D-fructose 6-phosphate and orthophosphate. EC 3.1.3.11.	Fructose-1,6-Bisphosphatase,Fructose-1,6-Diphosphatase,Fructosediphosphatase,Hexosediphosphatase,D-Fructose-1,6-Bisphosphate 1-Phosphohydrolase,FDPase,Fructose-1,6-Biphosphatase,1-Phosphohydrolase, D-Fructose-1,6-Bisphosphate,D Fructose 1,6 Bisphosphate 1 Phosphohydrolase,Fructose 1,6 Biphosphatase,Fructose 1,6 Bisphosphatase,Fructose 1,6 Diphosphatase,Fructose Bisphosphatase
D000242	Cyclic AMP	An adenine nucleotide containing one phosphate group which is esterified to both the 3'- and 5'-positions of the sugar moiety. It is a second messenger and a key intracellular regulator, functioning as a mediator of activity for a number of hormones, including epinephrine, glucagon, and ACTH.	Adenosine Cyclic 3',5'-Monophosphate,Adenosine Cyclic 3,5 Monophosphate,Adenosine Cyclic Monophosphate,Adenosine Cyclic-3',5'-Monophosphate,Cyclic AMP, (R)-Isomer,Cyclic AMP, Disodium Salt,Cyclic AMP, Monoammonium Salt,Cyclic AMP, Monopotassium Salt,Cyclic AMP, Monosodium Salt,Cyclic AMP, Sodium Salt,3',5'-Monophosphate, Adenosine Cyclic,AMP, Cyclic,Adenosine Cyclic 3',5' Monophosphate,Cyclic 3',5'-Monophosphate, Adenosine,Cyclic Monophosphate, Adenosine,Cyclic-3',5'-Monophosphate, Adenosine,Monophosphate, Adenosine Cyclic
D000626	Aminopeptidases	A subclass of EXOPEPTIDASES that act on the free N terminus end of a polypeptide liberating a single amino acid residue. EC 3.4.11.	Aminopeptidase