Aspergillus sojae is a koji (starter) mold that has been applied
for food fermentation in Asia. The whole genome of A. sojae
SMF 134, which was isolated from meju (Korean soybean
fermented brick), was analyzed at the genomic level to evaluate
its potential as a starter for soybean fermentation. The
genome size was 40.1 Mbp, which was expected to be composed
of eight chromosomes with 13,748 ORFs. Strain SMF
134 had a total of 151 protease genes, among which two more
leucine aminopeptidase (lap) genes were found in addition to
the previously known lap1, and three γ-glutamyltranspeptidase
(ggt) genes were newly identified. Such genomic characteristics
of SMF 134 with many protease and flavor-related
(lap and ggt) genes support its merits as a starter for soybean
fermentation. In addition, this first complete genome of
A. sojae will allow for further genetic studies to better understand
the production of various enzymes, including proteases,
LAPs, and GGTs, as well as other characteristics as a starter
mold for soybean fermentation.
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