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Fluorescence Lifetime Distribution Brings Out Mechanisms Involving Biomolecules While Quantifying Population Heterogeneity

  • G. KrishnamoorthyEmail author
Chapter
Part of the Reviews in Fluorescence book series (RFLU)

Abstract

Flexibility and motional dynamics in biological macromolecules give rise to conformational and structural heterogeneity. Quantification of the level of heterogeneity is essential for providing deeper understanding of molecular mechanisms in biology. Fluorescence lifetime distribution generated by the Maximum Entropy Method (MEM) provides an unbiased estimate of structural heterogeneity. This chapter discusses several examples where MEM-generated lifetime distribution brings out site-specific conformational and structural heterogeneity in proteins and membranes. Use of the information on heterogeneity in revealing molecular mechanisms is also discussed.

Keywords

Structural heterogeneity Fluorescence lifetime distribution Maximum entropy method Protein folding Molecular crowding Synuclein Nile red Gramicidine Bipolar lipid membrane Fusion peptide 

Notes

Acknowledgments

The authors thank Profs. Jayant Udgaonkar, Deepak Dhar, Amitabha Chattopadhyay, N. Periasamy, and Samir Maji and Drs. G.S. Lakshmikanth, K. Sridevi, Megha Kishore, Santosh Jha, Samsuzzoha Mondal, Shruti Sahay, Sourav Haldar, Soumi Mukherjee and Hirak Chakravorty for their collaboration in the research work described here. Prof. N. Periasamy is thanked for providing the software used in the analysis of time-domain fluorescence data, and for his advice in using it effectively.

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Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.Department of BiotechnologyAnna UniversityChennaiIndia
  2. 2.Department of ChemistryIndian Institute of TechnologyMumbaiIndia

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