Abstract:
:The recombinant human malonyl-CoA decarboxylase (hMCD) was overexpressed in Escherichia coli with and without the first 39 N-terminal amino acids via a cleavable MBP-fusion construct. Proteolytic digestion using genenase I to remove the MBP-fusion tag was optimized for both the full length and truncated hMCD. The apo-hMCD enzymes were solubilized and purified to homogeneity. Steady-state kinetic characterization showed similar kinetic parameters for the MBP-fused and apo-hMCD enzymes with an apparent Km value of approximately 330-520 microM and a turnover rate kcat of 13-28s(-1). For the apo-hMCD enzymes, the N-terminal truncated hMCD was well tolerated over a broad pH range (pH 4-10); whereas the full-length hMCD appeared to be stable only at pH >/= 8.5. Our results showed that the N-terminal region of hMCD has no effect on the catalytic activity of the enzyme but plays a role in the folding process and conformation stability of hMCD.
journal_name
Protein Expr Purifjournal_title
Protein expression and purificationauthors
Zhou D,Yuen P,Chu D,Thon V,McConnell S,Brown S,Tsang A,Pena M,Russell A,Cheng JF,Nadzan AM,Barbosa MS,Dyck JR,Lopaschuk GD,Yang Gdoi
10.1016/j.pep.2003.11.023keywords:
subject
Has Abstractpub_date
2004-04-01 00:00:00pages
261-9issue
2eissn
1046-5928issn
1096-0279pii
S1046592803003887journal_volume
34pub_type
杂志文章abstract::The second enzyme of the naphthalene degradation pathway in Pseudomonas putida G7 is NahB, a dehydrogenase that converts cis-1,2-dihydroxy-1,2-dihydronaphthalene to 1,2-dihydroxynaphthalene. We report the cloning, optimization of expression, purification, kinetic studies and preliminary structural characterization of ...
journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
pub_type: 杂志文章
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
pub_type: 杂志文章
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/j.pep.2006.06.008
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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abstract::We examined the feasibility of high-level production of recombinant human prolactin, a multifunctional protein hormone, in insect cells using a baculovirus expression system. The human prolactin cDNA with and without the secretory signal sequence was cloned into pFastBac1 baculovirus vector under the control of polyhe...
journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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abstract::Strategies for the expression of precursors of eukaryotic secreted proteins as part of fused proteins in Escherichia coli have been explored. A fusion protein with beta-galactosidase at the N-terminal end and honeybee prepromelittin at the C-terminal end (beta-gal-pM) was expressed in low amounts as a cleaved polypept...
journal_title:Protein expression and purification
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abstract::Most parasitic protozoa lack the de novo purine biosynthetic pathway and rely exclusively on the salvage pathway for their purine nucleotide requirements. Enzymes of the salvage pathway are, therefore, candidate drug targets. We have cloned the Plasmodium falciparum adenylosuccinate synthetase gene. In the parasite, a...
journal_title:Protein expression and purification
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journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/j.pep.2007.09.009
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journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1006/prep.2000.1349
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journal_title:Protein expression and purification
pub_type: 杂志文章,评审
doi:10.1006/prep.2001.1465
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abstract::Mitochondrial 2,4-dienoyl-CoA reductase is a key enzyme for the beta-oxidation of unsaturated fatty acids. The cDNA of the full-length human mitochondrial 2,4-dienoyl-CoA reductase was previously cloned as pUC18::DECR. PCR methodologies were used to subclone the genes encoding various truncated human mitochondrial 2,4...
journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/s1046-5928(03)00191-8
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