Affiliation:
1. Department of Biotechnology, Graduate School of Engineering, Osaka University, Yamada-oka, Suita, Osaka, Japan
Abstract
ABSTRACT
The genus
Propionibacterium
has a wide range of probiotic activities that are exploited in dairy and fermentation systems such as cheeses, propionic acid, and tetrapyrrole compounds. In order to improve production of tetrapyrrole compounds, we expressed the
hemA
gene, which encodes δ-aminolevulinic acid (ALA) synthase from
Rhodobacter sphaeroides
, and the
hemB
gene, which encodes porphobilinogen (PBG) synthase from
Propionibacterium freudenreichii
subsp.
shermanii
IFO12424, either monocistronically or polycistronically in strain IFO12426. The recombinant strains accumulated larger amounts of ALA and PBG, with resultant 28- to 33-fold-higher production of porphyrinogens, such as uroporphyrinogen and coproporphyrinogen, than those observed in strain IFO12426, which harbored the shuttle vector pPK705.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
Cited by
25 articles.
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