Patterns of molecular evolution and predicted function in thaumatin-like proteins of Populus trichocarpa.

Planta
Jia Ping Zhao, Xiao Hua Su

Abstract

Some pathogenesis-related proteins (PR proteins) are subject to positive selection, while others are under negative selection. Here, we report the patterns of molecular evolution in thaumatin-like protein (TLP, PR5 protein) genes of Populus trichocarpa. Signs of positive selection were found in 20 out of 55 Populus TLPs using the likelihood ratio test and ML-based Bayesian methods. Due to the connection between the acidic cleft and the antifungal activity, the secondary structure and three-dimensional structure analyses predicted antifungal activity beta-1,3-glucanase activities in these TLPs. Moreover, the coincidence with variable basic sites in the acidic cleft and positively selected sites suggested that fungal diseases may have been the main environmental stress that drove rapid adaptive evolution in Populus.

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Citations

Feb 22, 2012·Genome Biology and Evolution·M M PentonyM D Purugganan
Feb 18, 2011·BMC Plant Biology·Benjamin PetreSébastien Duplessis
Jan 1, 2011·Journal of Pathogens·Stéphane HacquardSébastien Duplessis
Dec 17, 2017·BMC Evolutionary Biology·Mariana Mondragón-PalominoThomas Dresselhaus
Mar 20, 2019·Current Protein & Peptide Science·Carolline de Jesús-PiresAna Maria Benko-Iseppon

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