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Biodesulfurization of dibenzothiophene by recombinant Gordonia alkanivorans RIPI90A.

Abstract：

:The dszABC genes from newly reported dibenzothiophene biodesulfurizing bacterium, Gordonia alkanivorans RIPI90A were cloned and sequenced. The overall nucleotide sequence similarity between the dszABC genes of G. alkanivorans RIPI90A and those of Rhodococcus erythropolis IGTS8 and Gordonia nitida were 83.1% and 83.2%, respectively. A gene transfer system for G. alkanivorans RIPI90A was established employing the Escherichia coli-Rhodococcus shuttle vector pRSG43 as suitable cloning vector, resulting in transformation efficiencies up to 1.6 x 10(5)CFUs microg(-1) plasmid DNA. This stable vector was applied to cloning and efficient expression of the dsz genes under the control of lac promoter. The recombinant strain was able to desulfurize dibenzothiophene in the presence of inorganic sulfate and sulfur-containing amino acids. The maximum desulfurization activity by recombinant resting cells (131.8 microM2-hydroxybiphenylg(dry cell weight)(-1)h(-1)) was increased 2.67-fold in comparison to the highest desulfurization activity of native resting cells.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Shavandi M,Sadeghizadeh M,Zomorodipour A,Khajeh K

doi

10.1016/j.biortech.2008.06.011

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

475-9

issue

1

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(08)00531-2

journal_volume

100

pub_type

杂志文章

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