Abstract
In the presence of exogenous acetyl coenzyme A14-C and choline, the 20 000 g supernatant fraction of whole bulb-mite homogenates synthesized a radioactive product that chromatographed with authentic acetylcholine (ACh). ApparentK m values were 0.12 and 1.14 mM for acetyl coenzyme A and choline, respectively, and the average rate of ACh synthesis was 2.06 μmol h−1 g−1 equivalent of mite tissue (wet weight). Choline acetyltransferase (ChAT) activity was inhibited by 5,5′-dithiobis(2-nitrobenzoic acid), suggesting the presence of functionally important sulfhydryl groups. However, ChAT activity was not inhibited by 27 acaricides from several different chemical classes, except for the thiazolidine flubenzimine which gave a pI50 of 3.5 mol l−1.
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Baillie, A.C., Corbett, J.R., Dowsett J.R., Sattelle, D.B. and Callec, J.-J., 1975. Inhibitors of choline acetyltransferase as potential insecticides. Pestic. Sci., 6: 645–653.
Boccacci, M., Natalizi, G. and Bettini, S., 1960. Research on the mode of action of halogen containing thiol alkylating agents on insects. Effect of iodoacetic acid on choline acetylase. J. Insect Physiol. 4: 20–26.
Bot, J. and Meyer, M.K.P., 1967. An artificial rearing medium for acarid mites. J. Entomol. Soc. S. Afr., 29: 199.
Colhoun, E.H., 1958. Distribution of choline acetylase in insect conductive tissue. Nature, 182: 1378.
Currier, S.F. and Mautner, H.G., 1974. On the mechanism of action of choline acetyltransferase. Proc. Natl. Acad. Sci. USA, 71: 3355–3358.
Emson, P.C., Malthe-Sorenssen, D. and Fonnum, F., 1974. Purification and properties of choline acetyltransferase from the nervous system of different invertebrates. J. Neurochem., 22: 1089–1098.
Errampalli, D.D. and Knowles, C.O., 1990. Cholinesterase inhibition in the bulb miteRhizoglyphus echinopus (Acari: Acaridae) in relation to the acaricidal action of organophosphates and carbamates. Exp. Appl. A arol., 9: 19–30.
Fonnum, F., 1969a. Isolation of choline esters form aqueous solutions by extraction with sodium tetraphenylboron in organic solvents. Biochem. J., 113: 291–298.
Fonnum, F., 1969b. Radiochemical micro assays for the determination of choline acetyltransferase and acetylcholinesterase activities. Biochem. J., 115: 465–472.
Frontali, N., 1958. Acetylcholine synthesis in housefly head. J. Insect Physiol., 1: 319–326.
Hestrin, S., 1949. The reaction of acetylcholine and other carboxylic acid derivatives with hydroxylamine, and its analytical application. J. Biol. Chem., 180: 249–261.
Knowles, C.O., 1990. Exploitation of mite biochemical targets by acaricides. In: J.E. Casida (Editor), Pesticides and Alternatives. Elsevier, Amsterdam, pp. 395–406.
Lineweaver, H. and Burk, D., 1934. The determination of enzyme dissociation constants. J. Am. Chem. Soc., 56: 658–666.
Mehrotra, K.N., 1960. Development of the cholinergic system in insect eggs. J. Insect Physiol., 5: 129–142.
Mehrotra, K.N., 1961. Properties of choline acetylase from the housefly,Musca domestica L. J. Insect Physiol., 6: 215–221.
Mehrotra, K.N., 1963. Biochemistry of nerve function in acarina. In: J.A. Naegele (Editor), Advances in Acarology, Vol. 1, Comstock, Ithaca, NY, pp. 209–213.
Mehrotra, K.N. and Dauterman, W.C., 1963. TheN-alkyl group specificity of choline acetylase from the housefly,Musca domestica L., and the two-spotted spider mite,Tetranychus telarius L. J. Insect Physiol., 9: 293–298.
O'Brien, R.D., 1967. Insecticides Action and Metabolism, Academic, New York, 332 pp.
Schroeder, M.E., Boyer, A.C., Flattum, R.F. and Sundelin K.G.R., 1978. Novel inhibitors of insect choline acetyltransferase and their effects on synaptic transmission at an insect cholinergic synapse. In: D.L. Shankland, R.M. Hollingworth and T. Smyth, Jr. (Editors), Pesticide and Venom Neurotoxicity. Plenum, New York, pp. 63–82.
Smallman, B.N., 1956. Mechanism of acetylcholine synthesis in the blowfly. J. Physiol., 132: 343–357.
Tuček, S., 1978. Acetylcholine Synthesis in Neurons. Chapman and Hall, London, 259 pp.
Yu, C.-C. and Booth, G.M., 1971. Inhibition of choline acetylase from the housefly (Musca domestica L.) and mouse. Life Sci., 10: 337–347.
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Contribution from the Missouri Agricultural Experiment Station, Columbia, Missouri, Journal Series No. 11 157.
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Errampalli, D.D., Knowles, C.O. Properties of choline acetyltransferase from the bulb miteRhizoglyphus echinopus (Acari: Acaridae). Exp Appl Acarol 12, 119–128 (1991). https://doi.org/10.1007/BF01204405
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DOI: https://doi.org/10.1007/BF01204405