Coordinate enzymatic activity of beta-oxidation and purine nucleotide cycle in a diversity of muscle and other organs of rat.
1. Most mammalian muscles consist of a mixture of different muscle fiber types. 2. We analyzed various muscles with different percentages of slow and fast fibers in addition to other organs of rat for enzyme activities of beta-oxidation and the purine nucleotide cycle (PNC). 3. According to the content of slow-twitch fibers all enzymes of beta-oxidation were high in activity whereas enzymes of the purine nucleotide cycle were low. 4. Amongst all enzymes of beta-oxidation, crotonase showed the highest activity. 5. In heart muscle, enzyme activities of beta-oxidation were even higher than in m. soleus which consists almost exclusively of slow-twitch type I fibers. 6. Measurements of all three enzymes involved in the purine nucleotide cycle revealed high activities in muscles predominantly composed of fast-twitch fibers. 7. It was always adenylate deaminase which revealed the highest activity. 8. Heart muscle showed low activities for enzymes of PNC.
Reichmann
H
H
Department of Neurology, University of Würzburg, FRG.
De Vivo
D C
DC
D000659:AMP Deaminase / Q000378:metabolism; D000101:Acetyl-CoA C-Acetyltransferase / Q000378:metabolism; D000818:Animals; D004746:Enoyl-CoA Hydratase / Q000378:metabolism; D044943:Fatty Acid Desaturases / Q000378:metabolism; D005227:Fatty Acids / Q000378:metabolism*; D008297:Male; D009132:Muscles / Q000201:enzymology*; D010084:Oxidation-Reduction; D011685:Purine Nucleotides / Q000378:metabolism*; D051381:Rats; D011919:Rats, Inbred Strains
D005227:Fatty Acids; D011685:Purine Nucleotides; D044943:Fatty Acid Desaturases; D000101:Acetyl-CoA C-Acetyltransferase; D000659:AMP Deaminase; D004746:Enoyl-CoA Hydratase