I am interested in understanding the mechanisms of fundamental biological processes in bacteria. My lab uses soil bacterium Myxococcus xanthus as the model organism. Several aspects of M. xanthus make it an ideal model for understanding bacterial physiology. First, M. xanthus cells utilize sophisticated systems to move on solid surfaces, which involve cytoplasmic and periplasmic proteins, filamentous cytoskeletons, membrane channels, cell wall, and cell surface components. Second, cells constantly communicate with each other and with their environment. Cells usually move in coordinated groups but also as isolated "adventurous" individuals, which allows this bacterium to feed on soil detritus and prey on other microorganisms. Third, when the availability of nutrients or prey decrease in the environment, most cells exhibit behaviors that include aggregation into fruiting bodies and conversion of individual cells into spores.
I have been using the super resolution photo-activated localization microscopy (PALM) to track single molecule dynamics of proteins in live bacterial cells. With this technique, I have achieved 10 millisecond time resolution (100 frames per second) and 80 nm spatial resolution. These studies were initiated because the most widely used fluorescence microscopy techniques (including confocal, deconvolution, etc.) can only provide resolution to about 200 nm due to the diffraction of light, which is often insufficient for many studies because of the small size of bacterial cells (usually a few hundred nanometers in diameter).
Our research topics cover motility, development (fruiting body formation and biofilm formation), cytoskeleton, and cell wall assembly.
- University of California, Berkeley - (Berkeley, California, United States), Postdoctoral Training 2012
- Ph.D. in Biochemistry and Molecular Biology, Peking University - (Beijing, Beijing, China) 2007
- B.Sc. in Microbiology, Inner Mongolia University - (Hohhot, China) 2002
- Aramayo, R., & Nan, B. (2022). De Novo Assembly and Annotation of the Complete Genome Sequence of Myxococcus xanthus DZ2.. Microbiol Resour Announc. 11(5), e0107421-e01021.
- Manson, M. D., Nan, B., Lele, P. P., Liu, J., & Duncan, T. M. (2022). Editorial: Biological rotary nanomotors.. Front Microbiol. 13, 1012681.
- Chen, J., & Nan, B. (2022). Flagellar Motor Transformed: Biophysical Perspectives of the Myxococcus xanthus Gliding Mechanism.. Front Microbiol. 13, 891694.
- Wong, G., Antani, J. D., Lele, P. P., Chen, J., Nan, B., Kühn, M. J., ... Dunkel, J. (2021). Roadmap on emerging concepts in the physical biology of bacterial biofilms: from surface sensing to community formation.. Phys Biol. 18(5), 051501-051501.
- Zhang, H., Venkatesan, S., & Nan, B. (2021). Myxococcus xanthus as a Model Organism for Peptidoglycan Assembly and Bacterial Morphogenesis. 9(5), 916-916.
Repository Documents / Preprints6
- Zhang, H., Pettibon, J. D., Patel, R., & Nan, B. (2022). Myxococcus xanthus, a nonpathogenic bacterium, eliminates Cryptococcus neoformans, a fungal pathogen of human, independent of cell-cell contact.
- Zhang, H., Venkatesan, S., Ng, E., & Nan, B. (2022). The coordination between penicillin-binding protein 1a (PBP1a) and the hydrolytic peptidase DacB determines the integrity of bacterial cell poles.
- Zhang, H., Venkatesan, S., & Nan, B. (2021). Myxococcus xanthus as a Model Organism for Peptidoglycan Assembly and Bacterial Morphogenesis.
- Zhang, H., Mulholland, G. A., Seef, S., Zhu, S., Liu, J., Mignot, T., & Nan, B. (2019). Establishing Rod-Shape from Spherical, Peptidoglycan-Deficient Bacterial Spores.
- Wright, T. A., Jiang, L., Park, J. J., Anderson, W. A., Chen, G. e., Hallberg, Z. F., Nan, B., & Hammond, M. C. (2019). Second messengers and divergent HD-GYP enzymes regulate 3’,3’-cGAMP signaling.