Adenine auxotrophic mutants of Aspergillus oryzae: development of a novel transformation system with triple auxotrophic hosts.

Journal Article (Journal Article)

adeA and adeB genes homologous to Saccharomyces cerevisiae ADE1 and ADE2, respectively, were cloned from Aspergillus oryzae. AdeA and AdeB share 62.8% and 52.5% identities with S. cerevisiae Ade1 and Ade2, respectively. In order to obtain triple auxotrophic mutants from A. oryzae, 12 red-colored mutant colonies were isolated by UV mutagenesis of a double auxotrophic host, NS4 (niaD(-), sC(-)), as a parent strain. All the mutants exhibited adenine auxotrophy and showed fluorescence in the vacuoles due to accumulation of a purine biosynthetic pathway precursor. Adenine auxotrophy of all the mutants was restored by introduction of either A. oryzae adeA or adeB genes. Sequence analysis demonstrated that substitutions or deletions of a single base pair occurred, inducing substitutions or frame shifts of amino acid sequences in both ade genes complementing the mutants. This study provides a novel host-vector system with triple auxotrophy in A. oryzae.

Full Text

Duke Authors

Cited Authors

  • Jin, FJ; Maruyama, J-I; Juvvadi, PR; Arioka, M; Kitamoto, K

Published Date

  • March 2004

Published In

Volume / Issue

  • 68 / 3

Start / End Page

  • 656 - 662

PubMed ID

  • 15056900

International Standard Serial Number (ISSN)

  • 0916-8451

Digital Object Identifier (DOI)

  • 10.1271/bbb.68.656


  • eng

Conference Location

  • England