Publications of NIPGR Scientists

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Author: search.filters.author.Mishra, PoonamSubject: search.filters.subject.Grain legume

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    Comparative analysis of sequence-structure function relationship of the SUN-domain protein CaSUN1
    (OMICS International, 2017) Mishra, Poonam; Wardhan, Vijay; Pandey, Aarti; Chakraborty, Subhra; Garg, Gunjan; Chakraborty, Niranjan
    Sad1/UNC-84 (SUN)-domain proteins are residents of inner nuclear membrane (INM), and share structural features across species. We previously reported a highly conserved C-terminal SUN-domain family protein, designated CaSUN1, in the stress-responsive proteomic landscape of a grain legume, chickpea. In this study, we identified two other chickpea SUN proteins, CaSUN2 and CaSUN3, and performed a comparative analysis of the sequence-structure-function relationship to better understand the diversification of SUN-domain superfamily proteins. Sequence similarity across the species was investigated using multiple sequence alignment, which showed conserved patterns between CaSUN1 and the homologs. Phylogenetic analysis showed that plant SUN-domain proteins are clustered in a unique and distinct group. Using ab-initio approach, a 3D protein structure was generated and further validated using various tools including the Ramachandran plot. The results displayed 90.1% of the à  and à ± residues angles in the most favoured regions, suggesting a high-quality structural model for CaSUN1. Model deviation and fluctuation analysis were performed using molecular dynamics (MD) simulation of CaSUN1. The secondary structure analysis of CaSUN revealed a similarity between the structural components shared among them. CaSUN1 revealed two functional domains viz., SUN and muskelin, and the presence of kelch-repeat domain pointed out its putative role in oligomerization, while its binding affinity with different ligands indicates diverse functions. These results would not only give deeper insights into the structure-function relationships within the SUNsuperfamily proteins, but also their putative physiological roles.
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    Proteomic analysis reveals the diversity and complexity of membrane proteins in chickpea (Cicer arietinum L.)
    (BioMed Central, 2012) Jaiswal, Dinesh Kumar; Ray, Doel; Subba, Pratigya; Mishra, Poonam; Gayali, Saurabh; Datta, Asis; Chakraborty, Subhra; Chakraborty, Niranjan
    Compartmentalization is a unique feature of eukaryotes that helps in maintaining cellular homeostasis not only in intra- and inter-organellar context, but also between the cells and the external environment. Plant cells are highly compartmentalized with a complex metabolic network governing various cellular events. The membranes are the most important constituents in such compartmentalization, and membrane-associated proteins play diverse roles in many cellular processes besides being part of integral component of many signaling cascades.