課題組主要研究方向是病原細菌耐藥、緻病機制；細菌基因組編輯；細菌環境适應性。課題組在《Cell Host & Microbe》、《PNAS》、《Science Advances》、《eLife》和《mBio》等雜志(zhì)發表Sci論文(wén)二十餘篇。
代表性研究成果：
1. Xiao-Peng Guo #, Hai-Qin Yan #, Wenhui Yang #, Zhe Yin, Viveka Vadyvaloo*, Dongsheng Zhou*, Yi-Cheng Sun*. A frameshift in Yersinia pestis rcsD alters canonical Rcs signalling to preserve flea-mammal plague transmission cycles. eLife, 2023, 12: e83946.
2. Mei-Yi Yan #, Dandan Zheng #, Si-Shang Li #, Xin-Yuan Ding, Chun-Liang Wang, Xiao-Peng Guo, Lingjun Zhan, Qi Jin *, Jian Yang *, Yi-Cheng Sun*. Application of combined CRISPR screening for genetic and chemical-genetic interaction profiling in Mycobacterium tuberculosis. Sci Adv, 2022, 8(47): eadd5907.
3. Mei-Yi Yan #, Si-Shang Li #, Xin-Yuan Ding, Xiao-Peng Guo, Qi Jin, Yi-Cheng Sun*. A CRISPR-Assisted Nonhomologous End-Joining Strategy for Efficient Genome Editing in Mycobacterium tuberculosis. mBio, 2020, 11(1): e02364-19.
4. Yi-Cheng Sun #, Clayton O Jarrett, Christopher F Bosio, B Joseph Hinnebusch *. Retracing the evolutionary path that led to flea-borne transmission of Yersinia pestis. Cell Host Microbe, 2014, 15(5):578-86.
5. Yi-Cheng Sun #, B Joseph Hinnebusch, Creg Darby *. Experimental evidence for negative selection in the evolution of a Yersinia pestis pseudogene. Proc Natl Acad Sci U S A, 2008, 105(23):8097-101.