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Identification of promoters of two dehydrogenase genes in Ketogulonicigenium vulgare DSM 4025 and their strength comparison in K. vulgare and Escherichia coli.

Abstract：

:Promoters of sorbose dehydrogenase gene sdh and sorbosone dehydrogenase gene sndh (Psdh and Psndh) in Ketogulonicigenium vulgare DSM 4025 were identified. The transcription initiation site (TIS) of Psdh was guanine 74 bp upstream of the start codon of sdh and the TIS of Psndh was adenine 113 bp upstream of the first codon of sndh. Comparing Psdh and Psndh, consensus sequences were found, which were TAVCVT (V=A, C or G) and THGAHC (H=A, C or T) for their putative -10 and -35 regions, respectively, and the spans between the 2 regions were 17 bp. Psdh and Psndh promoters may be constitutive in K. vulgare DSM 4025 when cultured in HJ medium. Semiquantitative RT-PCR analysis showed that the Psdh promoter was about 2.5 times stronger than Psndh in strength in K. vulgare DSM 4025. In Escherichia coli, Psdh and Psndh demonstrated strong activity with the former about two times stronger than the latter. DCIP decoloration method and reporter plasmids pSDH or pSNDH may be applied to discover promoters of genes in E. coli and to determine their strength in one step.

journal_name

Appl Microbiol Biotechnol

journal_title

Applied microbiology and biotechnology

authors

Fu S,Zhang W,Guo A,Wang J

doi

10.1007/s00253-007-0930-z

subject

Has Abstract

pub_date

2007-07-01 00:00:00

pages

1127-32

issue

5

eissn

0175-7598

issn

1432-0614

journal_volume

75

pub_type

杂志文章

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