Abstract:
:Hydrogenases are the key enzymes for the biological hydrogen production, which can be classified as H(2)-uptake hydrogenase and H(2)-production hydrogenase. The genes encoding a membrane-bound [NiFe]-hydrogenase (MBH), which is mainly responsible for hydrogen uptake, from the photosynthetic bacterium Allochromatium vinosum was cloned and sequenced. It consist of two structural genes (hydS, hydL) and two intergenic genes (isp1, isp2), which are therefore organized as hydS-isp1-isp2-hydL. This is different from the arrangement of other typical hydrogenase gene clusters. A deletion mutant-strain PhihydSL, lacking isp1, isp2, partial hydS and hydL genes, was constructed by marker-exchange mutagenesis. Under dark fermentative conditions, the hydrogen production yield by this mutant increased by 62%. The result suggests that the disruption of MBH could greatly improve the hydrogen production in the cells by decreasing the hydrogen uptake.
journal_name
Microbiol Resjournal_title
Microbiological researchauthors
Liang Y,Wu X,Gan L,Xu H,Hu Z,Long Mdoi
10.1016/j.micres.2009.03.001subject
Has Abstractpub_date
2009-01-01 00:00:00pages
674-9issue
6eissn
0944-5013issn
1618-0623pii
S0944-5013(09)00015-9journal_volume
164pub_type
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