Chirascan: Circular Dichroism Spectrometer

Chirascan is a powerful, modern circular dichroism (CD) spectrometer and thus a fast, sensitive, direct probe of the secondary structure, or conformation, of bio-molecules. One of the principal applications of Chirascan is in determining the secondary structure of proteins and it is also used to investigate their tertiary structure by measuring the CD induced in the aromatic side-chains and disulfide bonds of the peptide backbone.

Protein secondary and tertiary structures change under stress, for example with temperature or pH, and circular dichroism is used to assess conformational stability with changing environment. Used in this way, it has an important role to play in biotherapeutic drug development and formulation testing, where it can help to optimize buffer conditions that enhance product longevity. Circular dichroism is also used in bio-comparability studies to demonstrate conformational equivalence of material from different processes or sources and for determining that novel proteins are correctly folded. For more information see http://www.photophysics.com/chirascan.php. Use of your own cuvettes is strongly encouraged.

Contact Information:

Daria Sizova 
Hunter Radiation Therapy
15 York Street (Room WWW 308B)
New Haven, CT 06510
Phone: 203-785-4441 
email: daria.sizova@yale.edu

Jamie Towle-Weicksel
Hunter Radiation Therapy
15 York Street (Room WWW 308)
New Haven, CT 06510
Phone: 203-785-4441 
email: jamie.towle-weicksel@yale.edu

Publications

  1. Murphy DL, Kosa J, Jaeger J, Sweasy JB. (2008) The Asp285 variant of DNA polymerase beta extends mispaired primer termini via increased nucleotide binding. Biochemistry 47(31):8048-57.
  2. Sharron M, Pöhlmann S, Price K, Lolis E, Tsang M, Kirchhoff F, Doms RW, Lee B. (2000) Expression and coreceptor activity of STRL33/Bonzo on primary peripheral blood lymphocytes. Blood 96(1):41-9.