Genome-wide Identification and Characterization of Hsp70 gene family in Pearl millet (Pennisetumglaucum)

Divya, K and Kavi Kishor, P B and Maraka, N and Bhatnagar-Mathur, P and Singam, P and Vadez, V and Reddy, P S (2019) Genome-wide Identification and Characterization of Hsp70 gene family in Pearl millet (Pennisetumglaucum). Current Trends in Biotechnology and Pharmacy, 13 (2). pp. 102-111. ISSN 0973-8916

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Heat shock proteins (Hsps) are a class of molecular chaperons which are crucial for protein folding, assembly, and translocation in many normal cellular processes. They stabilize proteins and membranes, and can assist in protein refolding under stress conditions in plants. Pearl millet (Pennisetum glaucum) is highly abiotic stress tolerant, but its Hsps have not been characterized. In the present study, PgHsp70 genes were retrieved and gene information analyzed in order to characterize their structure, localization and functions. Genome-wide screening using the tools of bioinformatics identified 18 PgHsp70 genes in the pearl millet genome which have been categorized into four subfamilies depending on their cellular localization such as endoplasmic reticulum, mitochondria, chloroplast and cytoplasm. Number of introns ranged from 0-11 in PgHsp70 family genes and the genes are located across 1 to 7 chromosomes. Phylogenetic analysis of Hsp70s revealed that they are closely related to Sorghum Hsp70s. Promoter analysis showed the presence of cisacting elements such as GCN4, HSE, LTR, MBS, ABRE, MYB, and TC Aassociated with abiotic stress conditions indicating the involvement of these genes in the abiotic stress. Under vapour pressure deficit (VPD) conditions, leaf and root tissues of VPD-sensitive ICMR 1152 line, showed mild expression and in the presence of high VPD, VPD-insensitive ICMR1122 PgHsp70 genes showed high expression in leaf and root tissues in comparison with VPD-sensitive line. Gene PgcHsp70-1 displayed high transcript level under high VPD conditions. These results expand our horizon of understanding of the structure and function of Hsp70s, especially under abiotic stress conditions which can further be validated and employed in breeding programs and genetic engineering.

Item Type: Article
Divisions: Research Program : Genetic Gains
Research Program : Innovation Systems for the Drylands (ISD)
CRP: CGIAR Research Program on Grain Legumes and Dryland Cereals (GLDC)
Uncontrolled Keywords: Abiotic stress, Hsps, heat shock proteins, pearl millet, Hsp70 family, Vapour pressure deficit
Subjects: Others > Abiotic Stress
Mandate crops > Millets > Pearl Millet
Others > Genetics and Genomics
Depositing User: Mr Ramesh K
Date Deposited: 16 Jul 2019 04:21
Last Modified: 16 Jul 2019 04:23
Official URL:
Acknowledgement: PSR acknowledges the Department of Science and Technology, Government of India for the research grant award through INSPIRE Faculty (Award No. IFA11-LSPA-06). Thanks to SISU theme for the sequence extraction and AgriGenome for analyzing the expression data. This work was undertaken as part of the CGIAR Research Program on Grain Legumes & Dryland Cereals (CRP-GLDC). ICRISAT is a member of the CGIAR Consortium.
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