Abstract
Ubiquitin-mediated proteolysis is a central pathway that controls protein turnover. Ubiquitin–proteasome pathway works sequentially to ubiquitinate appropriate substrates that subsequently lead to its degradation via 26S proteasome. Among the several classes of ubiquitin E3 ligases, the SKP1-Cullin-F-box class is generally the most common and widely explored. SKP1-like proteins in plants have gained less attention than other SCF complex components, although they have a larger involvement in controlling wide aspects of vascular plants. Several studies have shown that SKP1-like proteins regulate abiotic stress tolerance on their own, in addition to working in the SCF complex. However, the identification and characterization of SKP1-like genes in chickpea are missing. In the present study, we have identified 15 SKP1-like genes in the chickpea genome that have been categorized into three types type Ia, type Ib, and type II based on the structure and sequence. The evolutionary conservation of the chickpea SKP1 family with dicots and monocots was discovered utilizing phylogenetic analysis. The presence of hormone, plant growth and development, and various stress-related cis-regulatory elements in all chickpea SKP1-like gene promoters showed that SKP1-like genes have a potential role in functions in hormone and various abiotic stress signaling in chickpea. According to the qRT-PCR expression study, most chickpea SKP1-like genes are differently expressed under three abiotic stresses; namely drought, salt, and oxidative stress. As a result, the current work offers up new possibilities for leveraging SKP1-related data to better understand the role of abiotic stress tolerance in the chickpea plant.
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Acknowledgements
This work was supported by the core grant of the National Institute of Plant Genome Research (NIPGR). We would like to thank Dr. Jawahar Singh, Ms. Sushma Sagar, Dr. Roshan Singh, and Mr. Ajeet Singh (NIPGR) to help in troubleshooting. We would also like to thank the Council of Scientific and Industrial Research (CSIR) and University Grant Commission (UGC), Government of India, for research fellowships. The authors are thankful to DBT-eLibrary Consortium (DeLCON) for providing access to e-resources.
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MM and VV conceptualized the idea of the article. VV has done all bioinformatics analyses, and experiments and wrote the first draft of the manuscript. AH designed qRT-PCR primers and help in stress treatment and sample collection. MM, VV, and AH read and approved the final manuscript.
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344_2022_10777_MOESM2_ESM.xlsx
Supplementary Table 2: Protein sequence alignment of Arabidopsis thaliana, Oryza sativa, Medicago truncatula, Glycine max, and Cicer arietinum SKP1-like genes by using MUSCLE. (XLSX 4942 kb)
344_2022_10777_MOESM5_ESM.xlsx
Supplementary Table 5: RPKM values obtained from Chickpea Transcriptome Database (CTDB) for the transcript of CaSKP genes. (XLSX 12 kb)
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Varshney, V., Hazra, A. & Majee, M. Identification, Genomic Organization, and Comprehensive Expression Analysis Reveals the Implication of Cicer arietinum SKP1-like Genes in Abiotic Stress. J Plant Growth Regul 42, 6074–6090 (2023). https://doi.org/10.1007/s00344-022-10777-0
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DOI: https://doi.org/10.1007/s00344-022-10777-0