Difference between revisions of "Part:BBa K4437001"
 
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===Usage and Biology===
 
===Usage and Biology===
  
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<<p>Derived from <I>Lactococcus lactis</I>, nisin is a food-safe, antimicrobial peptide (AMP) that targets a wide range of Gram-positive bacteria by binding to lipid II on the pathogens membrane, creating a pore, and causing cell death [1]. Literature suggests that nisin Q (NisQ) demonstrates greater antimicrobial and antioxidant activity against pathogens compared to other variants of nisin, such as NisA (BBa_K1365000) [2]. Nisin’s optimal pH stability is between 2 and 7 but can maintain its antibacterial activity up to a pH of 12, and can also retain its antimicrobial activity at temperatures of 120<sup>o</sup>C [2]. Unlike other AMPs, nisin is non-toxic to Gram-negative bacteria, meaning that successful recombinant expression in <I>E. coli<I> can be achieved without an inhibitory protein.</p>
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<p>Derived from <I>Lactococcus lactis</I>, nisin is a food-safe, antimicrobial peptide (AMP) that targets a wide range of Gram-positive bacteria by binding to lipid II on the pathogens membrane, creating a pore, and causing cell death [1]. Literature suggests that nisin Q (NisQ) demonstrates greater antimicrobial and antioxidant activity against pathogens compared to other variants of nisin, such as NisA (BBa_K1365000) [2]. Nisin’s optimal pH stability is between 2 and 7 but can maintain its antibacterial activity up to a pH of 12, and can also retain its antimicrobial activity at temperatures of 120<sup>o</sup>C [2]. Unlike other AMPs, nisin is non-toxic to Gram-negative bacteria, meaning that successful recombinant expression in <I>E. coli</I> can be achieved without an inhibitory protein.</p>
  
 
===Design===
 
===Design===
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<p> Nisin GB1 (BBa_K4437001) includes, a T7 promoter, a lac operon, RBS, TEV protease site, 6XHis-tag, two enterokinase cut sites, nisQ, and T7 terminator. The two enterokinase sites serves to make sure the 6XHis-tag is cleaved off and surely leaves us with nisQ. The lac operon functions to be able to use different protein induction media such as autoinduction medias when expression protein. The presence of the lac operon will allow the bacteria to switch from a glucose sugar source to a lactose sugar source. The rest if the elements are regulatory elements necessary to express our protein.</p>
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<p> Nisin GB1 (BBa_K4437001) includes, a T7 promoter, a lac operon, RBS, TEV protease site, 6XHis-tag, two enterokinase cut sites, nisQ, and T7 terminator. The two enterokinase sites serves to make sure the 6XHis-tag is cleaved off and surely leaves us with nisQ. The lac operon functions to be able to use different protein induction media such as autoinduction medias when expression protein. The presence of the lac operon will allow the bacteria to switch from a glucose sugar source to a lactose sugar source. The rest if the elements are regulatory elements necessary to express our protein.</p>  
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[[Image:gb1.png|400px|thumb|center]]
  
 
===Characterization===
 
===Characterization===
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<p> We have successfully characterized lanmodulin’s REE binding capabilities. To do this we conducted a metal recovery assay where an initial sample of neodymium was incubated with lanmodulin. In this assay an initial known sample of neodymium was incubated with the protein. The protein fraction was then removed using centrifugal filtration and the filtrate was analyzed using the colorimetric Arsenazo assay. </p>
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<p>We were able to insert our Nisin GB1 (BBa_K4437001) into a pSB1A3 plasmid. Once it was PCR amplified, it was run on a gel in which its indicated band size 331 was seen.</p>
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[[Image:PCR amplification of GB1.png|400px|thumb|center]]
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<p>Figure 1. PCR amplification of pSB1A3 plasmid containing GB1 (BBa_K4437001), using T7 promoter and terminator-specific primers, indicating successful cloning. Lane 2 contains our expected band size at 331 bp</p>
  
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<span class='h3bb'>Sequence and Features</span>
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===Sequence and Features===
 
<partinfo>BBa_K4437001 SequenceAndFeatures</partinfo>
 
<partinfo>BBa_K4437001 SequenceAndFeatures</partinfo>
  
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===References===
 
===References===
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<p>
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<ol>
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1. Zhou H, Fang J, Tian Y, Lu XY. Mechanisms of nisin resistance in Gram-positive bacteria. Annals of microbiology. 2014 Jun;64(2):413-20.
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<li>Zhou H, Fang J, Tian Y, Lu XY. Mechanisms of nisin resistance in Gram-positive bacteria. Annals of microbiology. 2014 Jun;64(2):413-20.</li>
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2. Mai HT, Van Hau N, Nghia NH, Thao DT. Expression and Purification of Nisin in Escherichia coli. Int. J. Life. Sci. Scienti. Res. eISSN. 2018 Jul;2455(1716):1716.
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<li>Mai HT, Van Hau N, Nghia NH, Thao DT. Expression and Purification of Nisin in Escherichia coli. Int. J. Life. Sci. Scienti. Res. eISSN. 2018 Jul;2455(1716):1716.</li>
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</p>
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</ol>

Latest revision as of 03:19, 14 October 2022


NisQ with a N-terminus 6x His-tag (NisQ-His)

Usage and Biology

Derived from Lactococcus lactis, nisin is a food-safe, antimicrobial peptide (AMP) that targets a wide range of Gram-positive bacteria by binding to lipid II on the pathogens membrane, creating a pore, and causing cell death [1]. Literature suggests that nisin Q (NisQ) demonstrates greater antimicrobial and antioxidant activity against pathogens compared to other variants of nisin, such as NisA (BBa_K1365000) [2]. Nisin’s optimal pH stability is between 2 and 7 but can maintain its antibacterial activity up to a pH of 12, and can also retain its antimicrobial activity at temperatures of 120oC [2]. Unlike other AMPs, nisin is non-toxic to Gram-negative bacteria, meaning that successful recombinant expression in E. coli can be achieved without an inhibitory protein.

Design

Nisin GB1 (BBa_K4437001) includes, a T7 promoter, a lac operon, RBS, TEV protease site, 6XHis-tag, two enterokinase cut sites, nisQ, and T7 terminator. The two enterokinase sites serves to make sure the 6XHis-tag is cleaved off and surely leaves us with nisQ. The lac operon functions to be able to use different protein induction media such as autoinduction medias when expression protein. The presence of the lac operon will allow the bacteria to switch from a glucose sugar source to a lactose sugar source. The rest if the elements are regulatory elements necessary to express our protein.

Gb1.png

Characterization

We were able to insert our Nisin GB1 (BBa_K4437001) into a pSB1A3 plasmid. Once it was PCR amplified, it was run on a gel in which its indicated band size 331 was seen.

PCR amplification of GB1.png

Figure 1. PCR amplification of pSB1A3 plasmid containing GB1 (BBa_K4437001), using T7 promoter and terminator-specific primers, indicating successful cloning. Lane 2 contains our expected band size at 331 bp

Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    INCOMPATIBLE WITH RFC[25]
    Illegal AgeI site found at 220
  • 1000
    COMPATIBLE WITH RFC[1000]


References

  1. Zhou H, Fang J, Tian Y, Lu XY. Mechanisms of nisin resistance in Gram-positive bacteria. Annals of microbiology. 2014 Jun;64(2):413-20.
  2. Mai HT, Van Hau N, Nghia NH, Thao DT. Expression and Purification of Nisin in Escherichia coli. Int. J. Life. Sci. Scienti. Res. eISSN. 2018 Jul;2455(1716):1716.