Abstract
L-Phenylalanine is an allosteric inhibitor of M1-type pyruvate kinase. Accordingly, the effects were studied of 20 mM phenylalanine on the metabolism of 5 mM [U-14C]glucose and 3 mM L-[U-14C]glutamate by isolated hemidiaphragms from starved rats. Phenylalanine inhibited lactate and14CO2 production from both substrates and stimulated alanine release. It is concluded that pyruvate kinase may have a dual role in intermediary metabolism in skeletal muscle: the enzyme is a component of the lower glycolytic pathway and is implicated in a pathway of amino acid oxidation and alanine synthesis.
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References
Bücher T & Pfleiderer G (1955) inMethods in Enzymology, vol 1 (Colowick, SP & Kaplan NO, eds), pp 435–440, Academic Press, New York.
Carminatti H, Jiménez de Asúa L, Leiderman B & Rozengurt E (1971) J. Biol. Chem.246, 7284–7288.
Carbonell J, Felui JE, Marco R & Sols A (1973) Eur. J. Biochem.37, 148–156.
Connett RJ (1979) Am. J. Physiol.237, C231–236.
Czot R & Lamprecht W (1974) inMethods in Enzymatic Analysis (Bergmeyer HU, ed), pp 1446–1451, Verlag Chemie, Weinheim, and Academic Press, London.
Dagley S (1974) inMethods in Enzymatic Analysis (Bergmeyer HU, ed), pp 1562–1565, Verlag Chemie, Weinheim, and Academic Press, London.
Gevers W & Dowdle E (1963) Clin. Sci.25, 343–349.
Goldstein L & Newsholme EA (1976) Biochem. J.154, 555–558.
Gutmann I & Wahlefeld AW (1974) inMethods in Enzymatic Analysis (Bergmeyer HU, ed), pp 1464–1468, Verlag Chemie, Weinheim, and Academic Press, London.
Halestrap AP & Denton RM (1974) Biochem. J.138, 313–316.
Hall ER & Cottom GL (1978) Int. J. Biochem.9, 785–793.
Kostos V, DiTullio NW, Rush J, Cielinski L & Saunders HL (1975) Arch. Biochem. Biophys.171, 459–465.
MacDonald MJ, Huang M-T & Lardy HA (1978) Biochem. J.176, 495–504.
Odedra BR & Palmer TN (1981) Biosci. Rep.1, 157–165.
Palmer TN & Odedra BR (1982) Biosci. Rep.2, 825–833
Rennie MJ & Edwards RHT (1981) inCarbohydrate Metabolism and Its Disorders (Randle PJ, Steiner DH & Whelan WJ, eds), pp 1–118, Academic Press, London.
Snell K (1980) Biochem. Soc. Trans.8, 205–213.
Snell K & Duff DA (1977) Biochem J.162, 399–403.
Snell K & Duff DA (1980) Biochem. Soc. Trans.8, 501–504.
Sugden PH (1980) FEBS Lett.114, 127–131.
Williamson DH (1974) inMethods in Enzymatic Analysis (Bergmeyer HU, ed), pp 1679–1682, Verlag Chemie, Weinheim, and Academic Press, London.
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Palmer, T.N., Caldecourt, M.A. & Slavin, J.P. Pyruvate kinase and alanine synthesis in skeletal muscle. Biosci Rep 2, 941–948 (1982). https://doi.org/10.1007/BF01114901
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DOI: https://doi.org/10.1007/BF01114901