Structure and stability of a rat odorant-binding protein: Another brick in the wall

Andrea Scirè, Anna Marabotti, Maria Staiano, Loic Briand, Antonio Varriale, Enrico Bertoli, Fabio Tanfani, Sabato D'Auria

Research output: Contribution to journalArticlepeer-review


The effect of temperature on the structure of the rat odorant-binding protein was investigated by spectroscopic and in silico methodologies. In particular, in this work, we examined the structural features of the rat OBP-1F by Fourier-transform infrared spectroscopy and molecular dynamics investigations. The obtained spectroscopic results were analyzed using the following three different methods based on the unexchanged amide hydrogens of the protein sample: (1) the analysis of difference spectra; (2) the generalized 2D-IR correlation spectroscopy; (3) the phase diagram method. The three methods indicated that at high temperatures the rOBP-1F structure undergoes a relaxation process involving the protein tertiary organization before undergoing the denaturation and aggregation processes, suggesting the presence of an intermediate state such as a molten globule-like state. Importantly, the proposed analyses represent a general approach that could be applied to the study of protein stability.

Original languageEnglish
Pages (from-to)4005-4013
Number of pages9
JournalJournal of Proteome Research
Issue number8
Publication statusPublished - Aug 7 2009


  • Fourier transform infrared spectroscopy
  • Lipocalin
  • Odorant-binding protein

ASJC Scopus subject areas

  • Biochemistry
  • Chemistry(all)


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