Open AccessInsertional mutagenesis and characterization of a polyketide synthase gene ( PKS1 ) required for melanin biosynthesis in Bipolaris oryzae ⋆
Author(s) -
Moriwaki Akihiro,
Kihara Junichi,
Kobayashi Tsutomu,
Tokunaga Toshiko,
Arase Sakae,
Honda Yuichi
Publication year - 2004
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.2004.tb09729.x
Subject(s) - polyketide synthase , aspergillus oryzae , biology , biosynthesis , gene , melanin , polyketide , tyrosinase , biochemistry , enzyme , genetics
A polyketide synthase gene named PKS1 , involved in the melanin biosynthesis pathway of the phytopathogenic fungus Bipolaris oryzae , was isolated using restriction enzyme‐mediated integration. Sequence analysis showed that the PKS1 encodes a putative protein that has 2155 amino acids and significant similarity to other fungal polyketide synthases. Targeted disruption of the PKS1 gene showed that it is necessary for melanin biosynthesis in B. oryzae . Northern blot analysis showed that PKS1 transcripts were specifically enhanced by near‐ultraviolet radiation (300–400 nm) and that its temporal transcriptional patterns were similar to those of THR1 and SCD1 genes involved in the melanin biosynthesis pathway of B. oryzae .