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@article{33447,
author = {Moturu, Tarakaramji and Thula, Sravankumar and Singh, R.K. and Nodzynski, Tomasz and Svobodová Vařeková, Radka and Friml, J. and Simon, Sibu},
article_location = {Oxford},
article_number = {9},
doi = {http://dx.doi.org/10.1093/jxb/ery097},
keywords = {D14; DLK2; evolution; KAI2; karrikin; MAX2; SMAX1-like; strigolactone},
language = {eng},
issn = {0022-0957},
journal = {Journal of Experimental Botany},
title = {Molecular evolution and diversification of the SMXL gene family},
url = {http://dx.doi.org/10.1093/jxb/ery097},
volume = {69},
year = {2018}
}
TY - JOUR
ID - 33447
AU - Moturu, Tarakaramji - Thula, Sravankumar - Singh, R.K. - Nodzynski, Tomasz - Svobodová Vařeková, Radka - Friml, J. - Simon, Sibu
PY - 2018
TI - Molecular evolution and diversification of the SMXL gene family
JF - Journal of Experimental Botany
VL - 69
IS - 9
SP - 2367-2378
EP - 2367-2378
PB - OXFORD UNIV PRESS
SN - 0022-0957
KW - D14
KW - DLK2
KW - evolution
KW - KAI2
KW - karrikin
KW - MAX2
KW - SMAX1-like
KW - strigolactone
UR - http://dx.doi.org/10.1093/jxb/ery097
N2 - Strigolactones (SLs) are a relatively recent addition to the list of plant hormones that control different aspects of plant development. SL signalling is perceived by an alpha/beta hydrolase, DWARF 14 (D14). A close homolog of D14, KARRIKIN INSENSTIVE2 (KAI2), is involved in perception of an uncharacterized molecule called karrikin (KAR). Recent studies in Arabidopsis identified the SUPPRESSOR OF MAX2 1 (SMAX1) and SMAX1-LIKE 7 (SMXL7) to be potential SCF-MAX2 complex-mediated proteasome targets of KAI2 and D14, respectively. Genetic studies on SMXL7 and SMAX1 demonstrated distinct developmental roles for each, but very little is known about these repressors in terms of their sequence features. In this study, we performed an extensive comparative analysis of SMXLs and determined their phylogenetic and evolutionary history in the plant lineage. Our results show that SMXL family members can be subdivided into four distinct phylogenetic clades/classes, with an ancient SMAX1. Further, we identified the Glade-specific motifs that have evolved and that might act as determinants of SL-KAR signalling specificity. These specificities resulted from functional diversities among the clades. Our results suggest that a gradual co-evolution of SMXL members with their upstream receptors D14/KAI2 provided an increased specificity to both the SL perception and response in land plants.
ER -
MOTURU, Tarakaramji, Sravankumar THULA, R.K. SINGH, Tomasz NODZYNSKI, Radka SVOBODOVÁ VAŘEKOVÁ, J. FRIML and Sibu SIMON. Molecular evolution and diversification of the SMXL gene family. \textit{Journal of Experimental Botany}. Oxford: OXFORD UNIV PRESS, 2018, vol.~69, No~9, p.~2367-2378. ISSN~0022-0957. Available from: https://dx.doi.org/10.1093/jxb/ery097.
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