Our laboratory is interested in uncovering biological and mechanistic insights into the regulation of protein function by Small Ubiquitin Modifier (SUMO) conjugation.
Plants have developed complex mechanisms to cope with adverse environmental conditions and, among them, protein modification by SUMO (Small Ubiquitin-like MOdifier) has emerged as a major mechanism that facilitates plant tolerance to a wide range of abiotic and biotic stresses (Benlloch and Lois 2018).
Our group is interested in three main lines of research:
1. Understanding the molecular mechanisms that control SUMO conjugation in vivo.
Consistent with being an essential process, we found that SUMO conjugation machinery is under different layers of regulation. We aim to identify the molecular effectors that mediate this regulation.
2. Uncovering novel biological roles of SUMO conjugation and the molecular mechanisms behind.
Among the multiple roles of SUMO conjugation, we are interested in understanding:
- The role of SUMO conjugation in developmental transitions, such as seed development and germination.
- The molecular determinants that mediate plant resistance to necrotrophic fungal pathogens by SUMO.
3. Developing molecular tools to modulate SUMO conjugation in vivo.
Taking advantage of the mechanistic insights into SUMO conjugation generated by our group and others, we have developed genetic and biochemical tools that allow us to modulate SUMO conjugation in vivo. These tools provide opportunities for developing novel agronomic strategies. The advantages of some of these tools expand to health therapies.
Benlloch, R., Maria Lois, L.
Sumoylation in plants: Mechanistic insights and its role in drought stress
(2018) Journal of Experimental Botany, 69(19): 4539-4554
Castaño-Miquel, L., Mas, A., Teixeira, I., Seguí, J., Perearnau, A., Thampi, B.N., Schapire, A.L., Rodrigo, N., La Verde, G., Manrique, S., Coca, M., Lois, L.M.
SUMOylation Inhibition Mediated by Disruption of SUMO E1-E2 Interactions Confers Plant Susceptibility to Necrotrophic Fungal Pathogens
(2017) Molecular Plant, 10(5): 709-720
Liu, B., Lois, L.M., Reverter, D.
Structural analysis and evolution of specificity of the SUMO UFD E1-E2 interactions
(2017) Scientific Reports, 7: 41998
Lois LM and Matthiesen R. eds. ç
(2016) Plant Proteostasis: Methods and Protocols. Methods in Molecular Biology. Humana Press.
Castaño-Miquel, L., Maria Lois, L.
Kinetic analysis of plant SUMO conjugation machinery
(2016) . In: Lois LM, Matthiesen R, eds. Plant Proteostasis: Methods and Protocols. Methods in Molecular Biology, 1450:107-123
Mas, A., Amenós, M., Lois, L.M.
Quantitative analysis of subcellular distribution of the SUMO conjugation system by confocal microscopy imaging
(2016) In: Lois LM, Matthiesen R, eds. Plant Proteostasis: Methods and Protocols. Methods in Molecular Biology, 1450:135-150
Schapire, A.L., Maria Lois, L.
A simplified and rapid method for the isolation and transfection of Arabidopsis leaf mesophyll protoplasts for large-scale applications
(2016) In: Botella JR, Botella MA, eds. Plant Signal Transduction. Humana Press. Methods in Molecular Biology, 1363:79-88
Castaño-Miquel, L., Segui, J., Manrique, S., Teixeira, I., Carretero-Paulet, L., Atencio, F., Lois, L.M.
Diversification of SUMO-activating enzyme in arabidopsis: Implications in SUMO conjugation
(2013) Molecular Plant, 6(5): 1646-1660
Castaño-Miquel, L., Seguí, J., Lois, L.M.
Distinctive properties of Arabidopsis SUMO paralogues support the in vivo predominant role of AtSUMO1/2 isoforms
(2011) Biochemical Journal, 436(3): 581-590
Chosed, R., Mukherjee, S., Lois, L.M., Orth, K.
Evolution of a signalling system that incorporates both redundancy and diversity: Arabidopsis SUMOylation
(2006) Biochemical Journal, 398(3):521-529
Lois, L.M., Lima, C.D.
Structures of the SUMO E1 provide mechanistic insights into SUMO activation and E2 recruitment to E1
(2005) EMBO Journal, 24(3): 439-451
Lois, L.M., Lima, C.D., Chua, N.-H.
Small ubiquitin-like modifier modulates abscisic acid signaling in Arabidopsis
(2003) Plant Cell, 15(6): 1347-1359