Biocatalytic desulfurization of thiophenic compounds and crude oil by newly isolated bacteria

Frontiers in Microbiology
Magdy El-Said MohamedJohn V Vedakumar

Abstract

Microorganisms possess enormous highly specific metabolic activities, which enable them to utilize and transform nearly every known chemical class present in crude oil. In this context, one of the most studied biocatalytic processes is the biodesulfurization (BDS) of thiophenic sulfur-containing compounds such as benzothiophene (BT) and dibenzothiophene (DBT) in crude oils and refinery streams. Three newly isolated bacterial strains, which were affiliated as Rhodococcus sp. strain SA11, Stenotrophomonas sp. strain SA21, and Rhodococcus sp. strain SA31, were enriched from oil contaminated soil in the presence of DBT as the sole S source. GC-FID analysis of DBT-grown cultures showed consumption of DBT, transient formation of DBT sulfone (DBTO2) and accumulation of 2-hydroxybiphenyl (2-HBP). Molecular detection of the plasmid-borne dsz operon, which codes for the DBT desulfurization activity, revealed the presence of dszA, dszB, and dszC genes. These results point to the operation of the known 4S pathway in the BDS of DBT. The maximum consumption rate of DBT was 11 μmol/g dry cell weight (DCW)/h and the maximum formation rate of 2-HBP formation was 4 μmol/g DCW/h. Inhibition of both cell growth and DBT consumption by 2-HBP was obs...Continue Reading

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Citations

Apr 1, 2018·Biotechnology Progress·Alberto RodriguezFelix Garcia-Ochoa
Aug 20, 2020·Journal of Applied Microbiology·A M M MawadN Yousef
Mar 6, 2019·Frontiers in Microbiology·Yitayal Shiferaw Anteneh, Christopher Milton Mathew Franco
Oct 14, 2020·Environmental Science and Pollution Research International·Hussein N NassarNour Sh El-Gendy
Feb 16, 2021·Biotechnology Advances·Caroline E PaulWillem J H van Berkel
Mar 22, 2021·Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences·Marinos StylianouAgapios Agapiou

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Datasets Mentioned

BETA
KM513657

Methods Mentioned

BETA
X-ray
electrophoresis
PCR

Software Mentioned

Blast search
ClustalX
Blast

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