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  • Title: [In silico cloning of glucose-6-phosphate dehydrogenase cDNA from rice (Oryza sativa L.)].
    Author: Huang J, Wang JF, Zhang HS, Cao YJ, Lin CF, Wang D, Yang JS.
    Journal: Yi Chuan Xue Bao; 2002; 29(11):1012-6. PubMed ID: 12645266.
    Abstract:
    In silico cloning was a new strategy of gene cloning developed with the development of genome, EST projects and bioinformatics. Using wheat glucose-6-phosphate dehydrogenase cDNA (clone: Tagpdl) sequence as a querying probe, one highly homologous BAC clone sequence was obtained from rice sequence database of GenBank and the putative cDNA sequence of rice glucose-6-phosphate dehydrogenase was assembled according to the wheat clone. Furthermore, the full-length cDNA of rice glucose-6-phosphate dehydrogenase was cloned by RT-PCR with two primers designed based on this assembled cDNA sequence. Since this fragment contained a complete ORF of 1515 bp with a stop codon in its upstream and poly(A) signal in its downstream, it could be concluded that a full-length gene (GenBank accession number AY078072), which was named as OsG6PDH. Homology analysis of OsG6PDH showed a 88% identity with wheat and the deduced amino acid showed 89%, 79% and 80% homology with G6PDH from wheat, tomato and tobacco respectively. OsG6PDH was expressed in inflorescence, embryo, root and leaf of rice, with a slightly higher in inflorescence and root. It was also discussed in this paper that the application of in silico cloning in the isolation of functional genes from rice.
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