EEM-Lab

Environmental and Evolutionary Microbiology Group @eem_lab
Prof. Jan Roelof van der Meer
Department of Fundamental Microbiology / University of Lausanne
Environmental and Evolutionary Microbiology

My primary interest is the environment, the quality of our living resources and the ways that bacteria can help to manage and degrade human wastes and restore environmental health. Consequently, I am very interested in genetic adaptation processes in bacteria, the mechanisms by which they deal with toxic substances, how they react to pollution in general and how we can apply microbial processes in a useful way (like bacterial bioreporters, bioremediation, microbiome engineering).

August 24 2025

Registration is now open for the NCCR Microbiomes' workshop Advanced methods in microbial community analysis. This short winter course will take place from 12-23 January 2026 at the University of Lausanne. NCCR experts will present in-depth topics in working with sequencing data, including experimental design, data analysis and interpretation, and data re-use.

Register at this link: https://forms.gle/kpNtq4jybxdMwrq58.

August 24 2025

Proliferation and survival of bacterial inoculants for bioaugmentation into soils is often limited by their incapacity to compete for nutrients with the native resident microbiota. In a new publication, Clara, Phil and Senka, in collaboration with the Greene lab, showed how engineered utilization of phosphite instead of phosphate as P-source, can give distinct advantages for a toluene-degrading strain of Pseudomonas veronii to grow and sustain in developing or steady-state soil microcosm-grown synthetic communities. Congratulations to all! Look at the open-access publication here.  

August 24 2025

Congratulations to Hammam, Nico and Hanna, for their new publication on the DNA sliding mechanism that permits a ParB-like protein encoded by ICEclc to regulate its activation and transfer. And a great outcome of the collaboration between the Gruber and van der Meer labs!

April 02 2025

A big hurrah to Roxane for passing her PhD thesis exam successfully!

March 24 2025

Congratulations to Gaitan and Nicolas for their new publication, uncovering the bimodal pattern of manganese oxidase expression in stationary phase Pseudomonas putida cells. Not yet the 'why' for manganese oxidation but at least the 'when'! And a great outcome of a wonderful collaboration with the group of Jasquelin Pena at UC Davis.

See more

Jan Roelof van der Meer

Group leader

Vladimir Sentchilo

Senior scientist

Senka Causevic

Postdoc

Maxime Batsch

PhD Student

Isaline Guex

Postdoc

Valentina Benigno

PhD student

Anthony Convers

PhD student

Bruna Fornasari

Junior Scientist

Hanna Budny

Technician

Juan Pablo Rueda Ramirez

Junior Scientist

Aline Raub

Master student

Davide Giliberti

Master student
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Jan Roelof van der Meer

See Jan van der Meer live at the 'Night of the Microbes' of the ISME meeting 2018.

iBiology.org Lecture: Jan van der Meer's video talk called

Synthetic Biology: Principles and Applications is available on iBiology.org at https://www.ibiology.org/bioengineering/introduction-to-synthetic-biology/

 

Latest publications

Phosphite as an engineered niche for Pseudomonas veronii in a synthetic soil bacterial community.

Bailey C, Gwyther P, Čaušević S, Greene BL, van der Meer JR.

mSystems. 2025 Aug 15. 10.1128/msystems.00061-25

Orchestrated long-distance gene activation by a ParB-like BisD-CTP DNA clamp in low-frequency transfer competence development in Pseudomonas putida.

Antar H, Carraro N, Budny H, Gruber S, van der Meer JR.

Nucleic Acids Res. 2025 Aug 11. 10.1093/nar/gkaf802

Pseudomonas putida Coordinates the Expression of two Manganese Oxidases and Optimizes Manganese Oxide Precipitation in Response to Aqueous Mn(II).

Gehin G, Carraro N, Gurfield K, van der Meer JR, Peña J.

Environ Sci Technol. 2025 Jul 15. 10.1021/acs.est.5c00255

Clinicopathological characterization of enteric glia in colorectal cancer: Insights from a population-based cohort.

Thijssen MS, Massen M, van der Meer JRM, Gijbels MJ, Samarska IV, van Engeland M, Weijenberg MP, van den Brandt PA, Smits KM, Boesmans W, Melotte V.

J Neuropathol Exp Neurol. 2025 Jun 28. 10.1093/jnen/nlaf067

Contact

  41-21-692 56 30/56 00

  janroelof.vandermeer (at] unil.ch

@eem_lab