Wu S. Y., Guyot Romain, Bocs S., Droc G., Oktavia F., Hu S. N., Tang C. R., Montoro P., Leclercq J. (2020). Structural and functional annotation of transposable elements revealed a potential regulation of genes involved in rubber biosynthesis by TE-derived siRNA interference in Hevea brasiliensis. International Journal of Molecular Sciences, 21 (12), 4220 [21 p.].
Titre du document
Structural and functional annotation of transposable elements revealed a potential regulation of genes involved in rubber biosynthesis by TE-derived siRNA interference in Hevea brasiliensis
Wu S. Y., Guyot Romain, Bocs S., Droc G., Oktavia F., Hu S. N., Tang C. R., Montoro P., Leclercq J.
Source
International Journal of Molecular Sciences, 2020,
21 (12), 4220 [21 p.]
The natural rubber biosynthetic pathway is well described inHevea, although the final stages of rubber elongation are still poorly understood. Small Rubber Particle Proteins and Rubber Elongation Factors (SRPPs and REFs) are proteins with major function in rubber particle formation and stabilization. Their corresponding genes are clustered on a scaffold1222 of the reference genomic sequence of theHevea brasiliensisgenome. Apart from gene expression by transcriptomic analyses, to date, no deep analyses have been carried out for the genomic environment ofSRPPsandREFsloci. By integrative analyses on transposable element annotation, small RNAs production and gene expression, we analysed their role in the control of the transcription of rubber biosynthetic genes. The first in-depth annotation of TEs (Transposable Elements) and their capacity to produce TE-derived siRNAs (small interfering RNAs) is presented, only possible in theHevea brasiliensisclone PB 260 for which all data are available. We observed that 11% of genes are located near TEs and their presence may interfere in their transcription at both genetic and epigenetic level. We hypothesized that the genomic environment of rubber biosynthesis genes has been shaped by TE and TE-derived siRNAs with possible transcriptional interference on their gene expression. We discussed possible functionalization of TEs as enhancers and as donors of alternative transcription start sites in promoter sequences, possibly through the modelling of genetic and epigenetic landscapes.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020]
;
Sciences du monde végétal [076]
