alexa Isolation and Characterization of Inositol Tetraphosphate 1-Kinase (AhITPK1) and Inositol 1,4,5-Tris-Phosphate Kinase (AhIPK2) Gene in Peanut
ISSN: 2168-9849

Cloning & Transgenesis
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Research Article

Isolation and Characterization of Inositol Tetraphosphate 1-Kinase (AhITPK1) and Inositol 1,4,5-Tris-Phosphate Kinase (AhIPK2) Gene in Peanut

Ajay BC1,2*, Ananga A2, Kambiranda D2, Obuya J2, Bera SK1, and Tsolova V2
1ICAR-Directorate of Groundnut Research, Post Box 5, Ivnagar Road, Junagadh 362001, India
2Centre for Viticulture and Small Fruit Research, Florida A&M University, 6505 Mahan Drive Tallahassee, Florida 32317, USA
*Corresponding Author : Ajay BC
Centre for Viticulture and Small Fruit Research
Florida A&M University, 6505 Mahan Drive
Tallahassee, Florida 32317, USA
Tel: 18505993000
E-mail: [email protected]
Received February 17, 2016; Accepted March 21, 2016; Published March 26, 2016
Citation: Ajay BC, Ananga A, Kambiranda D, Obuya J, Bera SK, et al. (2016) Isolation and Characterization of inositol Tetraphosphate1-Kinase (AhITPK1) and Inositol 1,4,5-Tris-Phosphate Kinase (AhIPK2) Gene in Peanut. Clon. Transgen. 5: 150. doi:10.4172/2168-9849.1000150
Copyright: © 2016 Ajay BC, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
 

Abstract

In the current study, partial cDNA clones of inositol tetraphosphate 1-kinase (ITPK1) and inositol 1,4,5-trisphosphate kinase/inositol polyphosphate multikinase (IPK2), were isolated from embryo using RT-PCR and designated as AhITPK1 and AhIPK2 isoforms of the gene. The partial cDNA sequence of AhITPK1 and AhIPK2 genes have an open reading frame (ORF) of 1146 and 891bp respectively and showed high similarity to other plant genes. AhITPK1 shared high homology with Aradu. Q95MC of Arachis duranensis, had a single exon with no introns and belonged to ATP-grasp family of proteins. AhIPK2 shared high similarity with Aradu.24V9G of A. duranensis and contained three exons with 5’ and 3’ UTR’s on either side. Unlike other IPK2 genes, AhIPK2 possessed conserved domains such as PxxxDxKxG and [L/M][I/V]D[F/L][A/G][H/K]. Phylogenetic analysis grouped AhITPK1 with A. duranensis, A. ipinensis and Oryza brachyantha into one cluster, whereas AhIPK2 was grouped along with Cucumis melo and C. sativus. Evolutionarily, AhITPK1 and AhIPK2 were genetically distinct from other plant genera. Furthermore, real-time PCR analysis revealed high expression of AhITPK1 and AhIPK2 genes in the peanut embryo and flower bud. For the first time AhITPK1 (KR778986) and AhIPK2 (KR778988) genes belonging to phytic acid pathway from Arachis hypogaea were identified and characterized the expression pattern of these two isoforms on different tissues. These genes were found to be abundant in flower bud and embryo. Results suggest that embryo development significantly influences the expression of the two AhIPK isoforms in peanut. Evolutionarily they were found to be distinct from their parental species. This study is an important step toward understanding the role of these two AhIPK isoforms in phytic acid synthesis. However, future research involving RNAi-based functional characterization is warranted to establish their link to embryo development in peanut.

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