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Cloning and characterization of two new Class III peroxidase genes from Catharanthus roseus

We report here the cloning and characterization of two new class III peroxidase genes, CrPrx3 and CrPrx4 from Catharanthus roseus. The full length cDNA of CrPrx3 is 1233 bp long encoding 330 amino acid residues. The CrPrx4 cDNA contains an ORF of 1055 bp, and encodes for 318 amino acids. Hypothetica...

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Published in:Plant physiology and biochemistry 2011-04, Vol.49 (4), p.404-412
Main Authors: Kumar, Santosh, Jaggi, Monika, Taneja, Jyoti, Sinha, Alok Krishna
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description We report here the cloning and characterization of two new class III peroxidase genes, CrPrx3 and CrPrx4 from Catharanthus roseus. The full length cDNA of CrPrx3 is 1233 bp long encoding 330 amino acid residues. The CrPrx4 cDNA contains an ORF of 1055 bp, and encodes for 318 amino acids. Hypothetical 3-D structure model of CrPrx3 and CrPrx4 detected the presence of two Ca 2+ ion binding sites at proximal and distal end, and a heme group coordinate at central position. CrPrx3 and CrPrx4 are present in single copy number in C. roseus. Confocal scanning microscopy and phylogenetic analysis showed that CrPrx3 and CrPrx4 are apoplastic in nature. Phylogenetic analysis revealed that both genes have diverse expression patterns in a variety of plant tissues. Quantitative real-time PCR confirmed their maximum expression in stem tissues followed by flower tissue. The expression levels of CrPrx3 and CrPrx4 were down-regulated under salt and dehydration stress, respectively. ► Cloning and characterization of two new peroxidases of Catharanthus roseus is reported. ► Both peroxidases CrPrx3 and CrPrx4 are down-regulated under salt and dehydration stress. ► qRT-PCR data indicate their differential expression pattern in tissue specific manner.
doi_str_mv 10.1016/j.plaphy.2011.01.012
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The expression levels of CrPrx3 and CrPrx4 were down-regulated under salt and dehydration stress, respectively. ► Cloning and characterization of two new peroxidases of Catharanthus roseus is reported. ► Both peroxidases CrPrx3 and CrPrx4 are down-regulated under salt and dehydration stress. ► qRT-PCR data indicate their differential expression pattern in tissue specific manner.</abstract><cop>Paris</cop><pub>Elsevier Masson SAS</pub><pmid>21320785</pmid><doi>10.1016/j.plaphy.2011.01.012</doi><tpages>9</tpages></addata></record>
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subjects Abiotic stress
Adaptation, Physiological - genetics
Amino Acid Sequence
amino acids
binding sites
Biological and medical sciences
Catharanthus - chemistry
Catharanthus - genetics
Catharanthus - metabolism
Catharanthus roseus
Cloning, Molecular
complementary DNA
copy number
Dehydration
Desiccation
DNA, Complementary - analysis
Down-Regulation
Flowers
Fundamental and applied biological sciences. Psychology
Gene Expression
Gene Expression Regulation, Plant
genes
Genes, Plant
Heme
Microscopy
Models, Molecular
Molecular Sequence Data
Molecular Structure
Nucleotides - analysis
Open reading frames
Peroxidase
Peroxidase - chemistry
Peroxidase - genetics
Peroxidase - metabolism
Peroxidases
Phylogeny
Plant physiology and development
Plant Proteins - chemistry
Plant Proteins - genetics
Plant Proteins - metabolism
Plant Stems
plant tissues
Polymerase Chain Reaction
quantitative polymerase chain reaction
Salt-Tolerance - genetics
Salts
Scanning
Stress
Stress, Physiological - genetics
Sub-cellular localization
title Cloning and characterization of two new Class III peroxidase genes from Catharanthus roseus
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