This enzyme was thought to form AMP [1,2], but studies with highly purified enzyme proved that it forms ADP . Carnosine is a dipeptide that is present at high concentrations in skeletal muscle and the olfactory bulb of vertebrates . It is also found in the skeletal muscle of some invertebrates. The enzyme can also catalyse the formation of homocarnosine from 4-aminobutanoate and L-histidine, with much lower activity .
Kalyankar, G.D. and Meister, A. Enzymatic synthesis of carnosine and related β-alanyl and γ-aminobutyryl peptides. J. Biol. Chem.234 (1959) 3210–3218. [PMID: 14404206]
Stenesh, J.J. and Winnick, T. Carnosine-anserine synthetase of muscle. 4. Partial purification of the enzyme and further studies of β-alanyl peptide synthesis. Biochem. J.77 (1960) 575–581. [PMID: 16748858]
Crush, K.G. Carnosine and related substances in animal tissues. Comp. Biochem. Physiol.34 (1970) 3–30. [PMID: 4988625]
Drozak, J., Veiga-da-Cunha, M., Vertommen, D., Stroobant, V. and Van Schaftingen, E. Molecular identification of carnosine synthase as ATP-grasp domain-containing protein 1 (ATPGD1). J. Biol. Chem.285 (2010) 9346–9356. [PMID: 20097752]