Cloning and characterization of a novel chalcone synthase gene from Phalaenopsis hybrida orchid flowers

Cloning and characterization of a novel chalcone synthase gene from Phalaenopsis hybrida orchid... Chalcone synthase (CHS, EC 2.3.1.74) is the key enzyme involved in flavonoid and anthocyanin biosynthesis. A complete DNA sequence of chalcone synthase gene designated Pchs1 was isolated by means of usual and then inverse polymerase chain reactions from genomic DNA of an orchid, Phalaenopsis hybrida, cv. Formosa rose. Nucleotide sequence analysis based on alignment with published Phalaenopsis chs cDNA revealed that Pchs1 contained an intact open reading frame of 1173-bp with one 109-bp intron at the conserved site. The deduced polypeptide (PCHS1) from Pchs1 comprised 390 amino acids with a predicted mol wt of 42.5 kD. PCHS1 showed 61–65% identities with CHS from other plants and retained most of the conserved residues. Some putative cis-regulatory elements were present at the 5′ and 3′ flanking regions of Pchs1. Southern blot analysis predicted at least four chs-like genes, thus indicating the presence of a small multigene chs family in P. hybrida. Relative quantitative RT-PCR showed that Pchs1 is expressed in petals at early flower development as well as in lip tissue when the flower has just opened. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Cloning and characterization of a novel chalcone synthase gene from Phalaenopsis hybrida orchid flowers

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Publisher
Nauka/Interperiodica
Copyright
Copyright © 2006 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Plant Sciences; Plant Physiology
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1134/S1021443706020129
Publisher site
See Article on Publisher Site

Abstract

Chalcone synthase (CHS, EC 2.3.1.74) is the key enzyme involved in flavonoid and anthocyanin biosynthesis. A complete DNA sequence of chalcone synthase gene designated Pchs1 was isolated by means of usual and then inverse polymerase chain reactions from genomic DNA of an orchid, Phalaenopsis hybrida, cv. Formosa rose. Nucleotide sequence analysis based on alignment with published Phalaenopsis chs cDNA revealed that Pchs1 contained an intact open reading frame of 1173-bp with one 109-bp intron at the conserved site. The deduced polypeptide (PCHS1) from Pchs1 comprised 390 amino acids with a predicted mol wt of 42.5 kD. PCHS1 showed 61–65% identities with CHS from other plants and retained most of the conserved residues. Some putative cis-regulatory elements were present at the 5′ and 3′ flanking regions of Pchs1. Southern blot analysis predicted at least four chs-like genes, thus indicating the presence of a small multigene chs family in P. hybrida. Relative quantitative RT-PCR showed that Pchs1 is expressed in petals at early flower development as well as in lip tissue when the flower has just opened.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Mar 24, 2006

References

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