Characterization Of A Highly Active Polyhydroxyalkanoate Synthase

Chuah, Jo-Ann (2012) Characterization Of A Highly Active Polyhydroxyalkanoate Synthase. PhD thesis, Universiti Sains Malaysia.

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Abstract

Polyhydroxyalkanoate (PHA) synthase from a locally isolated Chromobacterium sp. USM2 (PhaCCs) exhibited superior polymerizing ability and broad in vivo substrate specificity with preferences for short chain length (SCL) [3-hydroxybutyrate (3HB) and 3-hydroxyvalerate (3HV)] and medium chain length (MCL) [3-hydroxyhexanoate (3HHx)] monomers. For further characterization of the synthase, a Strep2-tagged PhaCCs for expression in and purification from Escherichia coli, was constructed in this study. In vitro enzymatic assay revealed an activity of 253 ± 13 U/mg for polymerization of 3-hydroxybutyryl-coenzyme A (3HB-CoA), which was approximately fivefold higher than that of model PHAproducing strain Cupriavidus necator (39 ± 5 U/mg).

Item Type:	Thesis (PhD)
Subjects:	Q Science > QH Natural history > QH1 Natural history (General - Including nature conservation, geographical distribution)
Divisions:	Pusat Pengajian Sains Kajihayat (School of Biological Sciences) > Thesis
Depositing User:	ASM Ab Shukor Mustapa
Date Deposited:	01 Jul 2019 07:24
Last Modified:	01 Jul 2019 07:24
URI:	http://eprints.usm.my/id/eprint/44792

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