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Four Trypanosoma brucei fatty acyl-CoA synthetases: fatty acid specificity of the recombinant proteins.


ABSTRACT: As part of our investigation of fatty acid metabolism in Trypanosoma brucei, we have expressed four acyl-CoA synthetase (TbACS) genes in Esherichia coli. The recombinant proteins, with His-tags on their C-termini, were purified to near homogeneity using nickel-chelate affinity chromatography. Although these enzymes are highly homologous, they have distinct specificities for fatty acid chain length. TbACS1 prefers saturated fatty acids in the range C(11:0) to C(14:0) and TbACS2 prefers shorter fatty acids, mainly C(10:0). TbACS3 and 4, which have 95% sequence identity, have similar specificities, favouring fatty acids between C(14:0) and C(17:0). In addition, TbACS1, 3 and 4 function well with a variety of unsaturated fatty acids.

SUBMITTER: Jiang DW 

PROVIDER: S-EPMC1222109 | biostudies-other | 2001 Sep

REPOSITORIES: biostudies-other

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