The Biophysics Group (formerly the Protein Dynamics Unit) is interested in the permeation of ions through biological membrane channels such as potassium, calcium, sodium and gramicidin chanels.  We use various theoretical and computational tools such as Molecular dynamics and Brownian dynamics to gain a physical insight into the permeation processes.

 

Research Staff 

 

Group Leader

Shin-Ho Chung

Postdoctoral Fellows

Daniel Gordon
Matthew Hoyles
Taira Vora

Research Associates

David Bisset
Anna Robinson

Honours Students

Melissa Tacey
Jin Aun Ng
Sina Straub

Senior Programmer

Steve McMahon

Research Assistant

Silvie Ngo

Employment Opportunities

Postdoctoral Fellow

Collaborations 

 
Theoretical Physics:
ANUSF: Thomas Huber, Andrey Bliznyuk, Alistair Rendell
ANUSF Visualisation: Drew Whitehouse, Ajay Limaye, Stuart Ramsden
 

Animations 

 

See our Animations and Demonstrations page

 

Potassium Channel
(Stuart Ramsden, NUSF)

Current Research 

 

The Potassium Channel:

Using the recently unveiled structure of the Potassium Channel we employ a combination of electrostatics, Brownian dynamics and molecular dynamics to investigate the way in which this biological channel discriminates between potasisum and sodium ions, and reproduce some physiological attributes of conduction. 

Visit our potassium channel page for a chapter by chapter explanation of the this channel using samples from our recent narrated video of the K + channel.

 
(Stuart Ramsden,ANUSF)
 

The Calcium Channel: 

By making use of electrostatic calculations and Brownian dynamics simulations, we show how the mechanisms of permeation and selectivity in the calcium channel can arise from simple electrostatic properties. The calcium channel page details our latest results. 

 
Calcium Channel
 

Testing Continuum Models of Ion Channels:

 

We have been making a systematic study of the validity of continuum theories of biological ion channels by comparison with Brownian dynamics simulations. More details can be found here

  

Gramicidin A:

Here we show a summary of our efforts to determine the energy landscape in Gramicidin A using a variety of theoretical techniques. 

Gramicidin A  

Gramicidin A
 

Photo Gallery

See our photo gallery page