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Bioinformation 2013

Molecular modeling and docking characterization of CzR1, a CC-NBS-LRR R-gene from Curcuma zedoaria Loeb. that confers resistance to Pythium aphanidermatum.

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Prisijungti Registracija
Nuoroda įrašoma į mainų sritį
Raj Kumar Joshi
Satyabrata Nanda
Ellojita Rout
Basudeba Kar
Pradeep Kumar Naik
Sanghamitra Nayak

Raktažodžiai

Santrauka

Plant NBS-LRR R-genes recognizes several pathogen associated molecular patterns (PAMPs) and limit pathogen infection through a multifaceted defense response. CzR1, a coiled-coil-nucleotide-binding-site-leucine-rich repeat R-gene isolated from Curcuma zedoaria L exhibit constitutive resistance to different strains of P. aphanidermatum. Majority of the necrotrophic oomycetes are characterized by the presence of carbohydrate PAMPs β-glucans in their cell walls which intercat with R-genes. In the present study, we predicted the 3D (three dimensional) structure of CzR1 based on homology modeling using the homology module of Prime through the Maestro interface of Schrodinger package ver 2.5. The docking investigation of CzR1 with β-glucan using the Glide software suggests that six amino acid residues, Ser186, Glu187, Ser263, Asp264, Asp355 and Tyr425 act as catalytic residues and are involved in hydrogen bonding with ligand β-(1,3)-D-Glucan. The calculated distance between the carboxylic oxygen atoms of Glu187-Asp355 pair is well within the distance of 5Å suggesting a positive glucanase activity of CzR1. Elucidation of these molecular characteristics will help in in silico screening and understanding the structural basis of ligand binding to CzR1 protein and pave new ways towards a broad spectrum rhizome rot resistance development in the cultivated turmeric.

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