title: Cloning and characterization of GPAT gene from Lepidium latifolium L.: a step towards translational research in agri-genomics for food and fuel.
abstract: Glycerol-3-phosphate acyltransferase (GPAT) catalyzes first and the rate limiting step in glycerolipid synthesis pathway, which in turn contribute to stabilization of plasma membrane structure and oil lipid synthesis in plant cells. Here, we report cloning and characterization of GPAT gene from Lepidium latifolium (LlaGPAT). The cDNA sequence (1,615 bp) of LlaGPAT gene consisted of 1,113 bp ORF encoding a protein of 370 aa residues, with deduced mass of 41.2 kDa and four acyltransferase (AT) motifs having role in catalysis and in glycerol-3-phosphate binding. Southern blot analysis suggested presence of a single copy of the gene in the genome. Tissue specific expression of the gene was seen more abundantly in aerial parts, compared to the roots. Quantitative real-time PCR indicated down-regulation of the gene by cold (4 °C), drought (PEG6000), salt (300 mM NaCl) and ABA (100 μM) treatments. Considering the vitality of the function of encoded enzyme, LlaGPAT can be considered a potential candidate gene for genetic engineering of oil yields and abiotic stress management in food as well as fuel crops.
authors: Molecular Biology and Genetic Engineering Laboratory, Defence Institute of Bio-Energy Research (DIBER), DRDO, Goraparao, P.O.-Arjunpur, Haldwani, Nainital, 263139, Uttarakhand, India. smg555@rediffmail.com
authors: Sanjay Mohan
authors: SM
authors: Gupta
authors: Pankaj
authors: P
authors: Pandey
authors: Atul
authors: A
authors: Grover
authors: Vikas Yadav
authors: VY
authors: Patade
authors: Sadhana
authors: S
authors: Singh
authors: Zakwan
authors: Z
authors: Ahmed
mesh_terms: D000383:Agriculture; D000595:Amino Acid Sequence; D003001:Cloning, Molecular; D018506:Gene Expression Regulation, Plant; D005992:Glycerol-3-Phosphate O-Acyltransferase / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism*; D029686:Lepidium / Q000145:classification / Q000235:genetics* / Q000378:metabolism*; D008969:Molecular Sequence Data; D054647:Nutrigenomics; D009928:Organ Specificity / Q000235:genetics; D010802:Phylogeny; D016415:Sequence Alignment; D013312:Stress, Physiological; D057170:Translational Research, Biomedical
chemical_list: D005992:Glycerol-3-Phosphate O-Acyltransferase
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