ABSTRACT
The formation of hydroxyectoine in the industrial ectoine producer
Halomonas elongata
was improved by the heterologous expression of the ectoine hydroxylase gene,
thpD
, from
Streptomyces chrysomallus.
The efficient conversion of ectoine to hydroxyectoine was achieved by the concerted regulation of
thpD
by the
H. elongata ectA
promoter.