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Published Paper: Hydrophobic gating in bundle crossing channels
Transmembrane ion channels frequently regulate ion permeation by forming bundle crossing of the pore-lining helices when deactivated. The resulting physical constriction is believed to serve as the de facto gate that imposes the major free energy barrier to ion permeation. Intriguingly, many ion channels also contain highly hydrophobic inner pores enclosed by bundle crossing, which can undergo spontaneous dewetting and give rise to a “vapor barrier” to block ion flow even in the absence of physical constriction. Using atomistic simulations, we show that hydrophobic gating and bundle-crossing mechanisms co-exist and complement one and another in the human TRPV4 channel. In particular, a single hydrophilic mutation in the lower pore can increase pore hydration and reduce the ion permeation free energy barrier by about half without affecting the bundle crossing. We believe that hydrophobic gating may play a key role in other bundle-crossing ion channels with hydrophobic inner pores. Read more
Jian passed ORP exam and is now a Ph.D candidate!
Original research proposal (ORP) is an exam designed to test the ability of graduate students to identify significant scientific questions, to develop research proposals based on rationized and reasonable hypotheses, and more importantly to successfully defend the proposal. 
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received CBI fellowship
CBI program (Chemistry-Biology Interface) is a highly competitive UMass-funded and NIH-funded fellowship, aiming at training trainees from different background to advance scientific research “at the interface of chemistry and biology”. 
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Presenting in Poster Section of 2022 BPS Annual Meeting
The Biophysical Society (BPS) annual meeting is held by international biophysics society, aiming at leading, disseminating and advancing knowledge in biophysics. 
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Jian’s arrival at U.S.
After a year-long remote study in China, I finally arrived at U.S. and met with Chen lab members! 
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hobbies
TBD
github – repo Read more
publications
Paper Title Number 1
This paper is about the number 1. The number 2 is left for future work. Read more
Recommended citation: Your Name, You. (2009). "Paper Title Number 1." Journal 1. 1(1). http://academicpages.github.io/files/paper1.pdf
Paper Title Number 2
This paper is about the number 2. The number 3 is left for future work. Read more
Recommended citation: Your Name, You. (2010). "Paper Title Number 2." Journal 1. 1(2). http://academicpages.github.io/files/paper2.pdf
Paper Title Number 3
This paper is about the number 3. The number 4 is left for future work. Read more
Recommended citation: Your Name, You. (2015). "Paper Title Number 3." Journal 1. 1(3). http://academicpages.github.io/files/paper3.pdf
research
TRPV4: a thermosensitive non-selective cation channel
Which domain is the thermo-sensor of TRPV4? What is the mechanism behind the thermo-sensitivity of TRPV4? 
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TMEM16F: an ion channel can scramble lipids
How can an ion channel transport lipid through the membrane bilayer? 
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Prediction of infectivity-enhancing mutations of the SARS-CoV-2 virus S (spike) protein
which mutations can enhance the affinity to the cell receptor and thus present challenges for vaccine and antibody development? 
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