Difference between revisions of "Part:BBa K118003"

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===Usage and Biology===
 
===Usage and Biology===
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===Structure===
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[[File:BBa K118003-Evry2016.jpeg|frame|left|Crystal structure of Phytoene desaturase CRTI from Pantoea ananatis]]
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===Improvement on BBa_K118003===
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　BBa_K118003 is the coding sequence of phytoene desaturase (CrtI/PDS) in ''Erwinia uredovora''. CrtI is an enzyme catalyzes the conversion of phytoene to lycopene in a one-step reaction. In iGEM16_SCAU-China project, ''CrtI'' is used to simplified a reconstructed pathway to achieve astaxanthin biosynthesis in higher plant, rice (''Oryza sativa''). The original ''CrtI'' is not suitable to express in higher plants. Thus, codon optimization on ''CrtI'' had made for rice. In addition, a ''Pea'' transit peptide of Rubisco small subunit is fused to the optimized CDS of ''CrtI'' for proper sorting into the plastid. Comparison of nucleaotide and amino acid sequence of original ''CrtI'' (''EuCrtI'') and optimized ''CrtI'' (''OsCrtI'') are shown in Figure.1 and Figure.2.
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[[File:T--SCAU-China--CrtICompare.png|500px|thumb|centre|<p>'''Figure. 1　　Sequence difference between ''EuCrtI'' (BBa_K118003) and ''OsCrtI'' (<partinfo>BBa_K1959002</partinfo>).'''</p>]]
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[[File:T--SCAU-China--CrtIpro.jpg |500px|thumb|centre|<p>'''Figure. 2　　Amino acid sequence of translated DNA of  ''EuCrtI'' (BBa_K118003) and ''OsCrtI'' (<partinfo>BBa_K1959002</partinfo>).'''<br>Sequence alignment shows that there are no differences between amino acid sequence of original ''CtrI'' and codon-optimized ''CrtI''.</p>]]
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　With the help of improved part, iGEM16_SCAU-China had successfully achieved astaxanthin biosynthesis in rice (Figure. 3). Content and purity of astaxanthin was determined by HPLC analysis (Figure. 4)
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[[File:T--SCAU-China--phenotype.jpg |500px|thumb|centre|<p>'''Figure. 3　　The polished rice phenotype of aSTARice.'''</p>]]
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[[File:T--SCAU-China--HPLC.jpg |500px|thumb|centre|<p>'''Figure. 4　　HPLC chromatogram of methanol extracts from transgenic aSTARice (red line) and wild-type (blue line) rice seeds. HPLC analysis recorded at 480 nm of extracts.'''</p>]]
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　For more details about the design of optimized ''CrtI'', please refer to https://parts.igem.org/Part:BBa_K1959002. For more details and analyses, please visit the wiki of SCAU-China 2016 (http://2016.igem.org/Team:SCAU-China).<BR>
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[Edited by Junyu Chen, SCAU-China 2016, 19 October 2016(UTC)]
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<partinfo>BBa_K118003 parameters</partinfo>
 
<partinfo>BBa_K118003 parameters</partinfo>
 
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===Structure===
 
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[[File:BBa K118003-Evry2016.jpeg|frame|left|Crystal structure of Phytoene desaturase CRTI from Pantoea ananatis]]
 

Revision as of 19:33, 19 October 2016

crtI coding sequence encoding phytoene dehydrogenase

This is the coding sequence of crtI from Pantoea ananatis (formerly Erwinia uredovora) (Accession number D90087). It encodes phytoene dehydrogenase, part of the carotenoid biosynthesis pathway, which converts Phytoene to Lycopene (Misawa, N., Nakagawa, N., Kobayashi, K., Yamano, S., Nakamura, K., and Harashima, K. 1990. Elucidation of the Erwinia uredovora carotenoid biosynthetic pathway by functional analysis of gene products expressed in Escherichia coli. Journal of Bacteriology 172, 6704-612). Two PstI sites were removed by site-directed mutagenesis.

Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    INCOMPATIBLE WITH RFC[21]
    Illegal BamHI site found at 71
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    COMPATIBLE WITH RFC[25]
  • 1000
    COMPATIBLE WITH RFC[1000]