Abstract
Neurospora glucamylase is a glucose-repressible extracellular enzyme. The enzyme was purified to homogeneity and found to have a molecular weight of 82,000 and to release glucose from either maltose or amylose. The rate of glucamylase synthesis increases more than 100-fold when cells are transferred from a glucose-containing medium to a glucose-free medium. Increased production of glucamylase begins within 30 min of the transfer. Glucamylase is rapidly secreted into the medium. A mutant affecting the ability of glucose to repress the synthesis of the glucose-repressible extracellular enzymes glucamylase and invertase has been isolated and studied. The mutant constitutively synthesizes and secretes a glucamylase which is indistinguishable from the wild-type enzyme.
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Funds for this research were provided by Grant PCM-8011772 from the National Science Foundation and by a grant from the Research Development Fund of The Research Foundation of the State University of New York.
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Sigmund, R.D., McNally, M.T., Lee, D.B. et al. Neurospora glucamylase and a mutant affected in its regulation. Biochem Genet 23, 89–103 (1985). https://doi.org/10.1007/BF00499115
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DOI: https://doi.org/10.1007/BF00499115