Difference between revisions of "Part:BBa K1469009"
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This device is used to over-express glmU gene in B. subtilis 168. glmU encodes UDP-N-acetylglucosamine pyrophosphorylase that converts GlcN-1-P to GlcNAc-1-P as well as GlcNAc-1-P to UDP-GlcNAc in the synthetic pathway of UDP-GlcNAc, one of the two HA precursors in B. subtilis. It is assumed that overexpression of glmU contributes to the elevation of UDP-GlcNAc production, which may have a positive effect on HA production. | This device is used to over-express glmU gene in B. subtilis 168. glmU encodes UDP-N-acetylglucosamine pyrophosphorylase that converts GlcN-1-P to GlcNAc-1-P as well as GlcNAc-1-P to UDP-GlcNAc in the synthetic pathway of UDP-GlcNAc, one of the two HA precursors in B. subtilis. It is assumed that overexpression of glmU contributes to the elevation of UDP-GlcNAc production, which may have a positive effect on HA production. | ||
</p> | </p> | ||
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− | <img src="https://static.igem.org/mediawiki/parts/ | + | <img src="https://static.igem.org/mediawiki/parts/c/cb/T--SSTi-SZGD--acid_pathway.png"style="width:50%"> |
− | In our project, glmU expression was regulated under the control of a constitutive promoter P43, and the recombinant pP43NMK-glmU vector was transformed into recombinant B.subtilis 168E, confirmed by colony PCR polymerization(Fig2) . It has been engineered to secrete extracellular HA. Our results showed the introduction of extra copies of glmU gene, resulted to an elevated HA accumulation in B.subtilis 168E (448mg/L, a 32% increase) (Fig3). Molecular weight analysis studies showed that HAs synthesized were high molecular weight(Fig4). | + | |
+ | <img src="https://static.igem.org/mediawiki/parts/7/7d/T--SSTi-SZGD--p43nmk_acid.png"style="width:50%"> | ||
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+ | <p>Fig1 a. the synthesis pathway of HA . b.the construct of glmU in pP43NMK plasmid </p><br> | ||
+ | <p>In our project, glmU expression was regulated under the control of a constitutive promoter P43, and the recombinant pP43NMK-glmU vector was transformed into recombinant B.subtilis 168E, confirmed by colony PCR polymerization(Fig2) . It has been engineered to secrete extracellular HA. Our results showed the introduction of extra copies of glmU gene, resulted to an elevated HA accumulation in B.subtilis 168E (448mg/L, a 32% increase) (Fig3). Molecular weight analysis studies showed that HAs synthesized were high molecular weight(Fig4). | ||
</p> | </p> | ||
+ | <img src="https://static.igem.org/mediawiki/parts/6/6d/T--SSTi-SZGD--glmu_HA.png"style="width:50%"> | ||
+ | <img src="https://static.igem.org/mediawiki/parts/f/fa/T--SSTi-SZGD--coding_sequence.png"style="width:50%"> | ||
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+ | <p>Figure 2: Left: 1% agarose gel electrophoresis of colony PCR amplifying section of gtaB gene in pP43NMK-gtaB-tuaD using primer pair GlmU-F and GlmU-R and the expected product size is 304 bp. Right: illustration of construction of the expression vector pP43NMK-glmU. GlmU coding sequence was inserted at restriction sites HindIII and BamHI of pP43NMK plasmid.</p><br> | ||
<p> | <p> | ||
− | <img src="https://static.igem.org/mediawiki/parts/ | + | <img src="https://static.igem.org/mediawiki/parts/4/40/T--SSTi-SZGD--Illustration.png"style="width:50%"> |
− | + | ||
− | </p> | + | <img src="https://static.igem.org/mediawiki/parts/e/e4/T--SSTi-SZGD--CTAB_solution.jpeg"style="width:50%"></p> |
+ | <p>Figure 3: CTAB analysis of HA concentration, a. Illustration of the turbidity by mixing different source of HA with CTAB solution. b: effects of overexpressing the precursor genes on HA production in recombinant B. </p><br> | ||
+ | |||
+ | <img src="https://static.igem.org/mediawiki/parts/4/4c/T--SSTi-SZGD--viscometer_analysis.png"style="width:50%"> | ||
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+ | <p>Figure4: molecular weights of HA produced by overexpression of precursor genes in recombinant B. subtilis 168E strains using viscometer analysis. </p> | ||
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<p> | <p> | ||
<img src="https://static.igem.org/mediawiki/parts/c/c5/T--SSTi-SZGD--glmu_product.png"><br> | <img src="https://static.igem.org/mediawiki/parts/c/c5/T--SSTi-SZGD--glmu_product.png"><br> |
Revision as of 17:07, 17 October 2018
gcaD
UDP-N-acetylglucosamine pyrophosphorylase of Bacillus megaterium. The enzyme is bifunctional and catalyses the conversion of glucosamine 1-phosphate to N-acetyl glucosamine 1-phosphate as well as the conversion of N-acetyl glucosamine 1-phosphate to UDP-N-acetyl glucosamine, a key precursor molecule for hyaluronic acid production.
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21INCOMPATIBLE WITH RFC[21]Illegal BamHI site found at 768
- 23COMPATIBLE WITH RFC[23]
- 25COMPATIBLE WITH RFC[25]
- 1000INCOMPATIBLE WITH RFC[1000]Illegal SapI.rc site found at 220
Characterization by SSTi-SZG(2018)
Usage
This is a improvement part of glmU (2014 saarland iGEM team) (also known as : GcaD in B.megaterium)
This device is used to over-express glmU gene in B. subtilis 168. glmU encodes UDP-N-acetylglucosamine pyrophosphorylase that converts GlcN-1-P to GlcNAc-1-P as well as GlcNAc-1-P to UDP-GlcNAc in the synthetic pathway of UDP-GlcNAc, one of the two HA precursors in B. subtilis. It is assumed that overexpression of glmU contributes to the elevation of UDP-GlcNAc production, which may have a positive effect on HA production.
Fig1 a. the synthesis pathway of HA . b.the construct of glmU in pP43NMK plasmid
In our project, glmU expression was regulated under the control of a constitutive promoter P43, and the recombinant pP43NMK-glmU vector was transformed into recombinant B.subtilis 168E, confirmed by colony PCR polymerization(Fig2) . It has been engineered to secrete extracellular HA. Our results showed the introduction of extra copies of glmU gene, resulted to an elevated HA accumulation in B.subtilis 168E (448mg/L, a 32% increase) (Fig3). Molecular weight analysis studies showed that HAs synthesized were high molecular weight(Fig4).
Figure 2: Left: 1% agarose gel electrophoresis of colony PCR amplifying section of gtaB gene in pP43NMK-gtaB-tuaD using primer pair GlmU-F and GlmU-R and the expected product size is 304 bp. Right: illustration of construction of the expression vector pP43NMK-glmU. GlmU coding sequence was inserted at restriction sites HindIII and BamHI of pP43NMK plasmid.
Figure 3: CTAB analysis of HA concentration, a. Illustration of the turbidity by mixing different source of HA with CTAB solution. b: effects of overexpressing the precursor genes on HA production in recombinant B.
Figure4: molecular weights of HA produced by overexpression of precursor genes in recombinant B. subtilis 168E strains using viscometer analysis.