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Expression of the Aspergillus aculeatus Endo- beta-1,4-mannanase Encoding Gene ( man1 ) in Saccharomyces cerevisiae and Characterization of the Recombinant Enzyme

Setati, M Evodia; Ademark, Pia; van Zyl, Willem H.; Hahn-Hägerdal, Bärbel LU and Stålbrand, Henrik LU (2001) In Protein Expression and Purification 21(1). p.105-114
Abstract
The endo-beta-1,4-mannanase encoding gene man1 of Aspergillus aculeatus MRC11624 was amplified from mRNA by polymerase chain reaction using sequence-specific primers designed from the published sequence of man1 from A. aculeatus KSM510. The amplified fragment was cloned and expressed in Saccharomyces cerevisiae under the gene regulation of the alcohol dehydrogenase ( ADH2PT ) and phosphoglycerate kinase ( PGK1PT ) promoters and terminators, respectively. The man1 gene product was designated Man5A. Subsequently, the FUR1 gene of the recombinant yeast strains was disrupted to create autoselective strains: S. cerevisiae Man5 ADH2 and S. cerevisiae Man5 PGK1. The strains secreted 521 nkat/ml and 379 nkat/ml of active Man5A after 96 h of growth... (More)
The endo-beta-1,4-mannanase encoding gene man1 of Aspergillus aculeatus MRC11624 was amplified from mRNA by polymerase chain reaction using sequence-specific primers designed from the published sequence of man1 from A. aculeatus KSM510. The amplified fragment was cloned and expressed in Saccharomyces cerevisiae under the gene regulation of the alcohol dehydrogenase ( ADH2PT ) and phosphoglycerate kinase ( PGK1PT ) promoters and terminators, respectively. The man1 gene product was designated Man5A. Subsequently, the FUR1 gene of the recombinant yeast strains was disrupted to create autoselective strains: S. cerevisiae Man5 ADH2 and S. cerevisiae Man5 PGK1. The strains secreted 521 nkat/ml and 379 nkat/ml of active Man5A after 96 h of growth in a complex medium. These levels were equivalent to 118 and 86 mg/l of Man5A protein produced, respectively. The properties of the native and recombinant Man5A were investigated and found to be similar. The apparent molecular mass of the recombinant enzyme was 50 kDa compared to 45 kDa of the native enzyme due to glycosylation. The determined Km and V max values were 0.3 mg/ml and 82 mumol/min/mg for the recombinant and 0.15 mg/ml and 180 mumol/min/mg for the native Man5A, respectively. The maximum pH and thermal stability were observed within the range of pH 4-6 and 50degreesC and below. The pH and temperature optima and stability were relatively similar for recombinant and native Man5A. Hydrolysis of an unbranched beta-1,4-linked mannan polymer released mannose, mannobiose, and mannotriose as the main products. Copyright 2001 Academic Press. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Protein Expression and Purification
volume
21
issue
1
pages
105 - 114
publisher
Academic Press
external identifiers
  • scopus:0034932962
ISSN
1046-5928
DOI
10.1006/prep.2000.1371
language
English
LU publication?
yes
id
5688d7c5-e69b-4a0d-9910-39cee22d0a97 (old id 125054)
date added to LUP
2007-07-06 15:08:09
date last changed
2018-05-29 10:25:35
@article{5688d7c5-e69b-4a0d-9910-39cee22d0a97,
  abstract     = {The endo-beta-1,4-mannanase encoding gene man1 of Aspergillus aculeatus MRC11624 was amplified from mRNA by polymerase chain reaction using sequence-specific primers designed from the published sequence of man1 from A. aculeatus KSM510. The amplified fragment was cloned and expressed in Saccharomyces cerevisiae under the gene regulation of the alcohol dehydrogenase ( ADH2PT ) and phosphoglycerate kinase ( PGK1PT ) promoters and terminators, respectively. The man1 gene product was designated Man5A. Subsequently, the FUR1 gene of the recombinant yeast strains was disrupted to create autoselective strains: S. cerevisiae Man5 ADH2 and S. cerevisiae Man5 PGK1. The strains secreted 521 nkat/ml and 379 nkat/ml of active Man5A after 96 h of growth in a complex medium. These levels were equivalent to 118 and 86 mg/l of Man5A protein produced, respectively. The properties of the native and recombinant Man5A were investigated and found to be similar. The apparent molecular mass of the recombinant enzyme was 50 kDa compared to 45 kDa of the native enzyme due to glycosylation. The determined Km and V max values were 0.3 mg/ml and 82 mumol/min/mg for the recombinant and 0.15 mg/ml and 180 mumol/min/mg for the native Man5A, respectively. The maximum pH and thermal stability were observed within the range of pH 4-6 and 50degreesC and below. The pH and temperature optima and stability were relatively similar for recombinant and native Man5A. Hydrolysis of an unbranched beta-1,4-linked mannan polymer released mannose, mannobiose, and mannotriose as the main products. Copyright 2001 Academic Press.},
  author       = {Setati, M Evodia and Ademark, Pia and van Zyl, Willem H. and Hahn-Hägerdal, Bärbel and Stålbrand, Henrik},
  issn         = {1046-5928},
  language     = {eng},
  number       = {1},
  pages        = {105--114},
  publisher    = {Academic Press},
  series       = {Protein Expression and Purification},
  title        = {Expression of the Aspergillus aculeatus Endo- beta-1,4-mannanase Encoding Gene ( man1 ) in Saccharomyces cerevisiae and Characterization of the Recombinant Enzyme},
  url          = {http://dx.doi.org/10.1006/prep.2000.1371},
  volume       = {21},
  year         = {2001},
}