News Column

Studies from Northeastern University Yield New Data on Microbial Photoreceptors

June 3, 2014

By a News Reporter-Staff News Editor at Life Science Weekly -- New research on Proteins is the subject of a report. According to news reporting out of Boston, Massachusetts, by NewsRx editors, research stated, "Green sulfur bacteria are an iconic example of natures adaptation: thriving in environments of extremely low photon density, the bacterium ranks itself among the most efficient natural light-harvesting organisms. The photosynthetic antenna complex of this bacterium is a self-assembled nanostructure, approximate to 60 x 150 nm, made of bacteriochlorophyll molecules."

Our news journalists obtained a quote from the research from Northeastern University, "We study the system from a computational nanoscience perspective by using electrodynamic modeling with the goal of understanding its role as a nanoantenna. Three different nanostructures, built from two molecular packing moieties, are considered: a structure built of concentric cylinders of aggregated bacteriochlorophyll d monomers, a single cylinder of bacteriochlorophyll c monomers, and a model for the entire chlorosome. The theoretical model captures both coherent and incoherent components of exciton transfer. The model is employed to extract optical spectra, concentration and depolarization of electromagnetic fields within the chlorosome, and fluxes of energy transfer for the structures. The second model nanostructure shows the largest field enhancement. Further, field enhancement is found to be more sensitive to dynamic noise rather than structural disorder. Field depolarization, however, is similar for all structures."

According to the news editors, the research concluded: "This Indicates that the directionality of transfer is robust to structural variations, while on the other hand, the intensity of transfer can be tuned by structural variations."

For more information on this research see: Electromagnetic Study of the Chlorosome Antenna Complex of Chlorobium tepidum. ACS Nano, 2014;8(4):3884-3894. ACS Nano can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society -; ACS Nano -

Our news journalists report that additional information may be obtained by contacting S. Valleau, Northeastern Univ, Dept. of Elect & Comp Engn, CEM & Photon Lab, Boston, MA 02115, United States. Additional authors for this research include S.K. Saikin, D. Ansari-Oghol-Beig, M. Rostami, H. Mossallaei and A. Aspuru-Guzik (see also Proteins).

Keywords for this news article include: Boston, Proteins, Porphyrins, Massachusetts, United States, Biological Factors, Bacteriochlorophylls, Microbial Photoreceptors, North and Central America

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC

For more stories covering the world of technology, please see HispanicBusiness' Tech Channel

Source: Life Science Weekly

Story Tools Facebook Linkedin Twitter RSS Feed Email Alerts & Newsletters