CHARACTERIZATION OC INULINASE AND INVERTASE ACTIVITIES IN <I>CANDIDA UTILIS</I>

Authors

  • M. Ros
  • Juan Carlos Argüelles
  • M. Gacto

Abstract

Invertase (E.e. 3,2.1.26) and inulinase (E.C. 3,2.1.7) were analyzed in Candida utilis CECT 1061 to determine whether one single enzyme with both activities or two enzymes with different substrate specificities were present in this yeasL The synthesis of both fructofuranosidase activities was under control of catabolite repression by glucose and they were present in whole cell extracts as well as in the extracellular culture fluids. The cell-associated activities appear mostly located in the periplasmic space. The two activities exhibited an identical optimum pH and similar profiles of thermal denaturation. In addition, a constant ratio was found between the inulinase and the invertase activities in a variety of culture conditions when extracellular media or cell extracts were assayed. From the results obtained it was concluded that both activities reside in a same protein of molecular weight close to 450,000 dalton which shows a difIerent afIinity for sucrose and inuline. Km values were 14 and 0,62mM, respectively.

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Author Biographies

M. Ros

Departamento de Microbiología Facultad de Biología Universidad de Murcia Murcia

Juan Carlos Argüelles

Departamento de Microbiología Facultad de Biología Universidad de Murcia Murcia

M. Gacto

Departamento de Microbiología Facultad de Biología Universidad de Murcia Murcia
How to Cite
Ros, M., Argüelles, J. C., & Gacto, M. (1985). CHARACTERIZATION OC INULINASE AND INVERTASE ACTIVITIES IN <I>CANDIDA UTILIS</I>. Anales de Biología, (5), 39–47. Retrieved from https://revistas.um.es/analesbio/article/view/35281
Issue
Section
Biología general