Publication details

Dirigent proteins in plants: modulating cell wall metabolism during abiotic and biotic stress exposure

Authors

PANIAGUA CORREAS Candelas Maria BÍLKOVÁ Anna JACKSON Philip Anthony P. DABRAVOLSKI Siarhei RIBER Willi Sascha DIDI Vojtěch HOUSER Josef GIGLI-BISCEGLIA Nora WIMMEROVÁ Michaela BUDINSKÁ Eva HAMANN Thorsten HEJÁTKO Jan

Year of publication 2017
Type Article in Periodical
Magazine / Source Journal of Experimental Botany
MU Faculty or unit

Central European Institute of Technology

Citation
Web https://academic.oup.com/jxb/article/68/13/3287/3795771/Dirigent-proteins-in-plants-modulating-cell-wall
Doi http://dx.doi.org/10.1093/jxb/erx141
Field Genetics and molecular biology
Keywords Biotic and abiotic stress response; cell walls; dirigent protein; lignan; lignin; regioselectivity; stereoselectivity
Description Dirigent (DIR) proteins were found to mediate regio- and stereoselectivity of bimolecular phenoxy radical coupling during lignan biosynthesis. Here we summarize the current knowledge of the importance of DIR proteins in lignan and lignin biosynthesis and highlight their possible importance in plant development. We focus on the still rather enigmatic Arabidopsis DIR gene family, discussing the few members with known functional importance. We comment on recent discoveries describing the detailed structure of two DIR proteins with implications in the mechanism of DIR-mediated catalysis. Further, we summarize the ample evidence for stress-induced dirigent gene expression, suggesting the role of DIRs in adaptive responses. In the second part of our work, we present a preliminary bioinformatics-based characterization of the AtDIR family. The phylogenetic analysis of AtDIRs complemented by comparison with DIR proteins of mostly known function from other species allowed us to suggest possible roles for several members of this family and identify interesting AtDIR targets for further study. Finally, based on the available metadata and our in silico analysis of AtDIR promoters, we hypothesize about the existence of specific transcriptional controls for individual AtDIR genes and implicate them in various stress responses, hormonal regulations, and developmental processes.
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