2-Methylbutyryl-CoA: succinate acyl-CoA transferase activity and function in Ascaris suum muscle.
A branched-chain acyl-CoA transferase activity which transfers coenzyme A from either 2-methylbutyryl or 2-methylvaleryl-CoA to succinate is present in the muscle mitochondria from the intestinal nematode, Ascaris suum. Its physiological function is discussed. This activity appears to differ from the previously described acetyl-CoA: propionate and propionyl-CoA:succinate acyl-CoA transferases on the basis of heat stability, substrate specificity and the requirement of a "factor" from boiled Ascaris mitochondria for optimal activity of only the branched-chain acyl-CoA transferase. The "factor" has been recovered from HPLC and some of its properties examined. It could not be replaced by a crude soluble fraction from rat liver mitochondria, or by adenine, guanine or inosine di- or triphosphates. Activity was lost upon ashing, but was not affected by treatment with either pepsin or chymotrypsin.
Department of Biological Sciences, University of Notre Dame, IN 46556.
H J
HJ
Saz
B S
BS
deBruyn
D000818:Animals; D017165:Ascaris suum / Q000201:enzymology*; D002851:Chromatography, High Pressure Liquid; D015256:Coenzyme A-Transferases / Q000302:isolation & purification* / Q000378:metabolism; D008931:Mitochondria, Muscle / Q000201:enzymology; D013696:Temperature
D015256:Coenzyme A-Transferases; C031212:acyl-CoA transferase