Browsing by Author "Unnati, G. Meher"

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    Genome-wide identification and expression analysis of chickpea U-box E3 ligases identifies CaPUB4 and CaPUB16 as candidate responsive genes for abiotic stress tolerance
    (Springer Nature Publishing AG, 2026) Fernandes, Nithya; Unnati, G. Meher; Bhattacharjee, Surjit; Pandey, Ashutosh; Mishra, Neelam
    U-box E3 ubiquitin ligases play a crucial role in post-translational protein modification, stress signaling, and cellular adaptation in plants. In this study, 38 non-redundant CaPUB genes were identified from the chickpea (Cicer arietinum) genome and characterized for their phylogenetic relationships, domain architecture, gene structures, and expression profiles. Synteny and gene ontology analyses revealed evolutionary conservation with Lotus japonicus and Arabidopsis thaliana, and functional involvement in processes such as ubiquitination, signaling, and stress responses. RNA sequencing and qPCR analyses demonstrated distinct tissue-specific expression patterns. Specifically, CaPUB14 and CaPUB2 were predominantly expressed in particular organs, whereas CaPUB4 and CaPUB16 were upregulated under drought and salt stress in the stress-tolerant ICC4958 cultivar. Functional interaction network analysis revealed that CaPUB4 and CaPUB16 proteins interact with an identical set of partner proteins, supporting the hypothesis that these ligases may function collaboratively in stress adaptation. Collectively, these findings provide insights into the diversity, expression patterns, and potential regulatory roles of the CaPUB gene family, highlighting promising candidate genes for future functional characterization and their possible utility in improving crop stress resilience.
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    MAPK cascade gene family in Camellia sinensis: In-silico identification, expression profiles and regulatory network analysis
    (BioMed Central Ltd, 2020) Chatterjee, Archita; Paul, Abhirup; Unnati, G. Meher; Rajput, Ruchika; Biswas, Trisha; Kar, Tamalika; Basak, Srijita; Mishra, Neelam; Pandey, Ashutosh; Srivastava, Anurag Prakash
    Background: Mitogen Activated Protein Kinase (MAPK) cascade is a fundamental pathway in organisms for signal transduction. Though it is well characterized in various plants, there is no systematic study of this cascade in tea. Result: In this study, 5 genes of Mitogen Activated Protein Kinase Kinase (MKK) and 16 genes of Mitogen Activated Protein Kinase (MPK) in Camellia sinensis were found through a genome-wide search taking Arabidopsis thaliana as the reference genome. Also, phylogenetic relationships along with structural analysis which includes gene structure, location as well as protein conserved motifs and domains, were systematically examined and further, predictions were validated by the results. The plant species taken for comparative study clearly displayed segmental duplication, which was a significant candidate for MAPK cascade expansion. Also, functional interaction was carried out in C. sinensis based on the orthologous genes in Arabidopsis. The expression profiles linked to various stress treatments revealed wide involvement of MAPK and MAPKK genes from Tea in response to various abiotic factors. In addition, the expression of these genes was analysed in various tissues. Conclusion: This study provides the targets for further comprehensive identification, functional study, and also contributed for a better understanding of the MAPK cascade regulatory network in C. sinensis.