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Vanadium affects vacuolation and phosphate metabolism in Hansenula polymorpha

Mannazzu, Ilaria Maria and Guerra, Emanuela and Strabbioli, Rosanna and Masia, Andreina and Maestrale, Giovanni Battista and Zoroddu, Maria Antonietta and Fatichenti, Fabrizio (1997) Vanadium affects vacuolation and phosphate metabolism in Hansenula polymorpha. FEMS Microbiology Letters, Vol. 147 (1), p. 23-28. eISSN 1574-6968. Article.

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DOI: 10.1111/j.1574-6968.1997.tb10215.x

Abstract

The yeast Hansenula polymorpha is able to grow on vanadate concentrations that are toxic to other organisms. Transmission electron microscopy analysis showed that H. polymorpha cells growing on a vanadate-containing medium undergo a significant increase in cell vacuolation and a thickening of the cell wall; the presence of small cytoplasmic vesicles and an increase in cristae at the level of the plasma membrane were also observed. These ultrastructural modifications were accompanied by a change in the intracellular polyphosphate level, as shown by in vivo 31P-NMR. The involvement of these observed changes in vanadium detoxification is discussed.

Item Type:Article
ID Code:3828
Status:Published
Refereed:Yes
Uncontrolled Keywords:Vanadate resistance, yeast, Hansenula polymorpha, secretion, vacuole, polyphosphate, vesicle
Subjects:Area 03 - Scienze chimiche > CHIM/03 Chimica generale e inorganica
Area 07 - Scienze agrarie e veterinarie > AGR/16 Microbiologia agraria
Divisions:001 Università di Sassari > 01 Dipartimenti > Chimica
001 Università di Sassari > 01 Dipartimenti > Scienze ambientali agrarie e biotecnologie agro-alimentari
Publisher:Elsevier
eISSN:1574-6968
Deposited On:04 May 2010 13:28

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