Mutants of monomeric red fluorescent protein mRFP1 at residue 66: Structure modeling by molecular dynamics and search for correlations with spectral properties

E. E. Khrameeva, V. L. Drutsa, E. P. Vrzheshch, D. V. Dmitrienko, P. V. Vrzheshch

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

To study the interrelation between the spectral and structural properties of fluorescent proteins, structures of mutants of monomeric red fluorescent protein mRFP1 with all possible point mutations of Glu66 (except replacement by Pro) were simulated by molecular dynamics. A global search for correlations between geometrical structure parameters and some spectral characteristics (absorption maximum wavelength, integral extinction coefficient at the absorption maximum, excitation maximum wavelength, emission maximum wavelength, and quantum yield) was performed for the chromophore and its 6 environment in mRFP1, Q66A, Q66L, Q66S, Q66C, Q66H, and Q66N. The correlation coefficients (0.81-0.87) were maximal for torsion angles in phenolic and imidazolidine rings as well as for torsion angles in the regions of connection between these rings and chromophore attachment to β-barrel. The data can be used to predict the spectral properties of fluorescent proteins based on their structures and to reveal promising positions for directed mutagenesis.

Original languageEnglish
Pages (from-to)1085-1095
Number of pages11
JournalBiochemistry (Moscow)
Volume73
Issue number10
DOIs
Publication statusPublished - Oct 2008
Externally publishedYes

Keywords

  • Correlations
  • Fluorescent proteins
  • Molecular dynamics
  • mRFP1
  • Mutants at residue 66
  • Spectral characteristics
  • Structure

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