Structural and dynamic changes of photoactive yellow protein during its photocycle in solution

G Rubinstenn, G W Vuister, F A Mulder, P E Düx, R Boelens, K J Hellingwerf, R Kaptein

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Light irradiation of photoactive yellow protein (PYP) induces a photocycle, in which red-shifted (pR) and blue-shifted (pB) intermediates have been characterized. An NMR study of the long-lived pB intermediate now reveals that it exhibits a large degree of disorder and exists as a family of multiple conformers that exchange on a millisecond time scale. This shows that the behavior of PYP in solution is different from what has been observed in the crystalline state. Furthermore, differential refolding to ground state pG is observed, whereby the central beta-sheet and parts of the helical structure are formed first and the region around the chromophore at a later stage.

Original languageEnglish
Pages (from-to)568-70
Number of pages3
JournalNature Structural Biology
Volume5
Issue number7
DOIs
Publication statusPublished - Jul 1998

Keywords

  • Bacterial Proteins
  • Chromatiaceae
  • Lasers
  • Nuclear Magnetic Resonance, Biomolecular
  • Photoreceptors, Microbial
  • Protein Conformation

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