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Influence of imprinting with A and B chains of insulin on binding and functional changes in tetrahymena

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Abstract

Insulin and its A and B chain increased the quantity of intracellular PAS-positive material (glycogen) in tetrahymena, whereas the combined A+B chains decreased it. Imprinting—previous interaction—with insulin, its A and B chains in themselves and with the A+B chain increased the hormone binding capacity of tetrahymena, but the functional effect of imprinting (storage or breakdown of glycogen) showed a different tendency with insulin and A+B chain on the one hand, and A chain and B chain on the other. Since the imprinting potential of a molecule promotes the induction of receptor formation, the fact remains that both component chains of insulin were able to act as potential imprinters, although the A chain was superior to the B chain in this respect throughout, and combined treatment with the A+B chain ultimately induced the formation of a similar binding site as insulin itself.

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Authors and Affiliations

  1. Department of Biology, Semmelweis University of Medicine, Magyvárad tér 4, POB 370, H-1445, Budapest, Hungary

    G. Csaba & P. Kovács

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  1. G. Csaba
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  2. P. Kovács
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Csaba, G., Kovács, P. Influence of imprinting with A and B chains of insulin on binding and functional changes in tetrahymena. Biosci Rep 10, 431–436 (1990). https://doi.org/10.1007/BF01152289

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  • DOI: https://doi.org/10.1007/BF01152289

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