Prof. Michael Knop joined the Scientific Advisory Board of the Chica and Heinz Schaller Foundation in January 2024.

Welcome to the Knop Lab!

Systems biology, meiosis and signal transduction

Research in our lab focuses on the processes that regulate cellular morphogenesis and cell signaling. These are very active and rapidly evolving areas of research that are driven by work conducted with model organisms such as yeast, flies or worms. The studies provide important conceptual and experimental input into work conducted with medically relevant mammalian systems.

Cell differentiation processes are associated with cellular pathways that regulate structural functions and metabolic changes necessary that the cell can adopt its new role. Using yeast we study cell differentiation in meiosis, where yeast cell are prone to assemble spores inside the boundaries of the original cell. We also study the cellular response to external stimuli such as the yeast mating pheromone. This leads to stimulation of the cell via MAP kinase signaling pathways and to a polarization necessary for cell-to-cell fusion.

The small size of the yeast genome and the rich spectrum of available methods make this organism an ideal model system to decipher the machinery or the mechanistic principles behind these processes. The goal of our work is to obtain a systems-level understanding of the main molecular processes behind the regulatory as well as the structural aspects.

An important driver of our work is the ability to observe cellular processes by microscopic imaging methods, such as live cell imaging. Here we seek to continuously expand our methods in order to be able to image protein functions in more details. We use methods such as fluorescence cross-correlation spectroscopy (FCS/FCCS), fluorescence lifetime imaging (FLIM) and other so-called F-techniques, in order to obtain to information about bio-molecules and their interaction partners in their natural environment. We combine these functional high-content imaging methods with genetic and genomic approaches to explore the processes of interest.

We currently focus on the following areas:

1. We would like to understand the extent by which spatial partitioning of cells by reaction-diffusion mechanisms does contribute to the regulation of signal transduction processes.
2. We would like to understand the evolutionary dimension of molecular mechanisms. By comparing the situation in related species we can obtain insight into the constraints that shape particular processes.
3. We develop new approaches and microscopic methods in order to improve systemic studies towards the function of proteins within complex processes using novel high-content imaging or screening methods.

5 Selected Publications

Meurer M, Duan Y, Sass E, Kats I, Herbst K, Buchmuller BC, Dederer V, Huber F, Kirrmaier D, Štefl M, Van Laer K, Dick TP, Lemberg MK, Khmelinskii A, Levy ED, Knop M. (2018) Genome-wide C-SWAT library for high-throughput yeast genome tagging. Nat Methods. 2018 Aug;15(8):598-600. doi: 10.1038/s41592-018-0045-8. Epub 2018 Jul 9. PubMed PMID: 29988096. (see Abstract)

Kats I, Khmelinskii A, Kschonsak M, Huber F, Knieß RA, Bartosik A, Knop M. (2018) Mapping Degradation Signals and Pathways in a Eukaryotic N-terminome. M. Mol Cell. 2018 May 3;70(3):488-501.e5. doi:10.1016/j.molcel.2018.03.033. PubMed PMID:29727619. (see Abstract)

Theer P, Dragneva D, Knop M. (2016) πSPIM: high NA high resolution isotropic light-sheet imaging in cell culture dishes. Sci Rep. 2016 Sep 13;6:32880. doi:10.1038/srep32880. PubMed PMID: 27619647; PubMed Central PMCID:PMC5020645.(see Abstract)

Huber F, Bunina D, Gupta I, Khmelinskii A, Meurer M, Theer P, Steinmetz LM, Knop M. (2016) Protein Abundance Control by Non-coding Antisense Transcription. M. Cell Rep. 2016 Jun 21;15(12):2625-36. doi:10.1016/j.celrep.2016.05.043. Epub 2016 Jun 9. PubMed PMID: 27292640; PubMed Central PMCID: PMC4920891 (see Abstract)

Khmelinskii A, Blaszczak E, Pantazopoulou M, Fischer B, Omnus DJ, Le Dez G, Brossard A, Gunnarsson A, Barry JD, Meurer M, Kirrmaier D, Boone C, Huber W, Rabut G, Ljungdahl PO, Knop M. (2014) Protein quality control at the inner nuclear membrane. Nature 516: 410-413 (see Abstract)








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