A metabolic pathway for catabolizing levulinic acid in bacteria.
A metabolic pathway for catabolizing levulinic acid in bacteria.
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DOI:
10.1038/s41564-017-0028-z
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发表时间:
2017-12
影响因子:
28.3
通讯作者:
Pfleger BF
中科院分区:
文献类型:
--
作者:
Rand JM;Pisithkul T;Clark RL;Thiede JM;Mehrer CR;Agnew DE;Campbell CE;Markley AL;Price MN;Ray J;Wetmore KM;Suh Y;Arkin AP;Deutschbauer AM;Amador-Noguez D;Pfleger BF
Microorganisms can catabolize a wide range of organic compounds and therefore have the potential to perform many industrially relevant bioconversions. One barrier to realizing the potential of biorefining strategies lies in our incomplete knowledge of metabolic pathways, including those that can be used to assimilate naturally abundant or easily generated feedstocks. For instance, levulinic acid (LA) is a carbon source that is readily obtainable as a dehydration product of lignocellulosic biomass and can serve as the sole carbon source for some bacteria. Yet, the genetics and structure of LA catabolism have remained unknown. Here, we report the identification and characterization of a seven-gene operon that enables LA catabolism inPseudomonas putidaKT2440. When the pathway was reconstituted with purified proteins, we observed the formation of four acyl-CoA intermediates, including a unique 4-phosphovaleryl-CoA and the previously observed 3-hydroxyvaleryl-CoA product. Using adaptive evolution, we obtained a mutant ofEscherichia coliLS5218 with functional deletions offadEandatoCthat was capable of robust growth on LA when it expressed the five enzymes from theP. putidaoperon. This discovery will enable more efficient use of biomass hydrolysates and metabolic engineering to develop bioconversions using LA as a feedstock.
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DOI:
10.1093/bioinformatics/btp163
发表时间:
2009-06-01
期刊:
Bioinformatics (Oxford, England)
影响因子:
--
作者:
Cock PJ;Antao T;Chang JT;Chapman BA;Cox CJ;Dalke A;Friedberg I;Hamelryck T;Kauff F;Wilczynski B;de Hoon MJ
通讯作者:
de Hoon MJ
影响因子:
3.5
作者:
Fox, JD;Routzahn, KM;Waugh, DS
通讯作者:
Waugh, DS
影响因子:
48
作者:
Gibson, Daniel G.;Young, Lei;Smith, Hamilton O.
通讯作者:
Smith, Hamilton O.
影响因子:
56.9
作者:
Daley, DO;Rapp, M;von Heijne, G
通讯作者:
von Heijne, G
影响因子:
16.6
作者:
Graewert, Tobias;Rohdich, Felix;Groll, Michael
通讯作者:
Groll, Michael