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China Journal of Chinese Materia Medica ; (24): 2086-2091, 2013.
Artículo en Chino | WPRIM | ID: wpr-346437

RESUMEN

<p><b>OBJECTIVE</b>To clone the cDNA sequence of squalene synthase gene from Paris polyphylla, and characterize the biological features of the obtained SQS.</p><p><b>METHOD</b>Using homology cloning and RACE technique, a full-length cDNA sequence of PpSQS gene was isolated from P. polyphylla. The obtained sequence was analyzed by bioinformatics softwares. A plasmid [named pET-30b (+)-PpSQS] was constructed for prokaryotic expression the recombinant PpSQS.</p><p><b>RESULT</b>The full-length cDNA of PpSQS gene is 1 498 bp, which contains a 1 212 bp ORF. Sequence analysis indicated that PpSQS encoded 403 amino acids residues with a calculated molecular weight (MW) of 46.36 kDa and an isoelectric point (pI) of 6.83. SDS-PAGE results showed that the recombinant PpSQS was expressed in Escherichia coli BL21 (DE3) by inducing with 1 mmol x L(-1) IPTG.</p><p><b>CONCLUSION</b>The full-length cDNA sequence of PpSQS gene was obtained from P. polyphylla, and its molecular features were consisted with classic SQS in plant. The recombinant PpSQS was successfully expressed in E. coli.</p>


Asunto(s)
Clonación Molecular , Escherichia coli , Genética , Farnesil Difosfato Farnesil Transferasa , Genética , Liliaceae , Filogenia , Proteínas Recombinantes
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