alexa Multiple states of a nucleotide-bound group 2 chaperonin.
Chemistry

Chemistry

Journal of Physical Chemistry & Biophysics

Author(s): Clare DK, Stagg S, Quispe J, Farr GW, Horwich AL,

Abstract Share this page

Abstract Chaperonin action is controlled by cycles of nucleotide binding and hydrolysis. Here, we examine the effects of nucleotide binding on an archaeal group 2 chaperonin. In contrast to the ordered apo state of the group 1 chaperonin GroEL, the unliganded form of the homo-16-mer Methanococcus maripaludis group 2 chaperonin is very open and flexible, with intersubunit contacts only in the central double belt of equatorial domains. The intermediate and apical domains are free of contacts and deviate significantly from the overall 8-fold symmetry. Nucleotide binding results in three distinct, ordered 8-fold symmetric conformations--open, partially closed, and fully closed. The partially closed ring encloses a 40\% larger volume than does the GroEL-GroES folding chamber, enabling it to encapsulate proteins up to 80 kDa, in contrast to the fully closed form, whose cavities are 20\% smaller than those of the GroEL-GroES chamber.
This article was published in Structure and referenced in Journal of Physical Chemistry & Biophysics

Relevant Expert PPTs

Relevant Speaker PPTs

Recommended Conferences

  • 5th International Conference and Exhibition on Physical Medicine & Rehabilitation
    Aug 14-16, 2017 Los Angeles, USA
  • 2nd International Conference on Physics
    Aug 28-30, 2017 Brussels, Belgium
  • 5th Global Chemistry Congress
    September 04-06, 2017 London, UK
  • 3rd World Chemistry Conference
    September 11-12, 2017 Dallas, USA
  • Global Conference on Physical Chemistry
    September 18-19, 2017 Dublin, Ireland
  • 2nd International Conference on Applied Chemistry  
    October 16-17, 2017 Toronto, Canada
Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

 
© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version
adwords