A novel BR-SMAD is required for larval development in barber’s pole worm Haemonchus contortus
Authors:Fangfang Li1, Peixi Qin1, Lisha Ye1, Nishith Gupta1,2,3 and Min Hu1
doi: 10.15698/mic2021.02.742
Volume 8, pp. 57 to 64, published 23/12/2020.
1 State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, People’s Republic of China.
2 Department of Molecular Parasitology, Faculty of Life Sciences, Humboldt University, Berlin, Germany.
3 Department of Biological Sciences, Birla Institute of Technology and Science Pilani (BITS-P), Hyderabad, India.
Keywords:
Haemonchus contortus, R-SMADs, BMP subfamily, RNAi, larval development.
Abbreviations:
AR-SMAD – activin/TGF-β/nodal activated R-SMAD,
BMP – bone morphogenic protein,
BR-SMAD – BMP and differentiation factor/Müllerian inhibiting substance activated R-SMAD,
Co-SMAD – common-mediator SMAD,
DBL1 – Dpp and BMP-like-1,
dsRNA – double strand RNA,
MH – mad homology domain,
NLS – nuclear localization sequence,
R-SMAD – receptor-regulated SMAD,
siRNA – small interfering RNA,
TGF-β – transforming growth factor β.
Corresponding Author(s):
Conflict of interest statement:
The authors declare no conflict of interest.
Please cite this article as:
Fangfang Li, Peixi Qin, Lisha Ye, Nishith Gupta and Min Hu (2020). A novel BR-SMAD is required for larval develop-ment in barber’s pole worm, Haemonchus contortus. Microbial Cell 8(2): 57-64. doi: 10.15698/mic2021.02.742
© 2020 Li et al. This is an open-access article released under the terms of the Creative Commons Attribution (CC BY) license, which allows the unrestricted use, distribution, and reproduction in any medium, provided the original author and source are acknowledged.
Abstract:
SMAD proteins mediate TGF-β signaling and thereby regulate the metazoan development; however, they are poorly defined in Haemonchus contortus–a common blood-sucking parasitic nematode of small ruminants. Here, we characterized an R-SMAD family protein in H. contortus termed HcSMA2, which is closely related to Caenorhabditis elegans SMA2 (CeSMA2) involved in the bone morphogenetic protein (BMP) signaling. Hcsma2 is transcribed in all developmental stages of H. contortus but highly induced in the adult male worms. The RNA interference with Hcsma2 retarded the transition of infective L3 into L4 larvae. Besides, the bimolecular fluorescence complementation revealed the interaction of HcSMA2 with a TGF-β-activated-R-SMAD (HcDAF8). Together these results show a BMP-like receptor-regulated SMAD in H. contortus that is required for larval differentiation and underscore an adaptive functional repurposing of BMP-signaling in parasitic worms.