Expression of tyrosinase in vegetative cultures of Neurospora crassa transformed with a metallothionein promoter/protyrosinase fusion gene.

Abstract:

:Wild-type Neurospora crassa, strain Singapore, was transformed with a N. crassa metallothionein promoter/protyrosinase fusion gene. Transformants produced tyrosinase during vegetative growth, as determined by Western analyses and activity assays. This is in sharp contrast to wild-type strains, where this enzyme is only expressed in situations of starvation or sexual differentiation. Complete integration of a 400 bp metallothionein promoter-fragment leads to constitutive expression of protyrosinase, whereas a 3.6 kb promoter-fragment conferred copper inducibility on the reporter gene in four transformants. A transformant with high constitutive tyrosinase levels was able to produce melanin on complete medium agar plates supplemented with 1 mg/ml L-tyrosine.

journal_name

Curr Genet

journal_title

Current genetics

authors

Kupper U,Linden M,Cao KZ,Lerch K

doi

10.1007/BF00318214

subject

Has Abstract

pub_date

1990-11-01 00:00:00

pages

331-5

issue

4

eissn

0172-8083

issn

1432-0983

journal_volume

18

pub_type

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