J
John T. M. Kennis
Researcher at VU University Amsterdam
Publications - 142
Citations - 7695
John T. M. Kennis is an academic researcher from VU University Amsterdam. The author has contributed to research in topics: Excited state & Chromophore. The author has an hindex of 45, co-authored 138 publications receiving 6939 citations. Previous affiliations of John T. M. Kennis include Leiden University & University of Connecticut.
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Journal ArticleDOI
Identification of a mechanism of photoprotective energy dissipation in higher plants
Alexander V. Ruban,Rudi Berera,Cristian Ilioaia,Cristian Ilioaia,Ivo H. M. van Stokkum,John T. M. Kennis,Andrew A. Pascal,Herbert van Amerongen,Bruno Robert,Peter Horton,Rienk van Grondelle +10 more
TL;DR: It is experimentally demonstrated that a change in conformation of LHCII occurs in vivo, which opens a channel for energy dissipation by transfer to a bound carotenoid, suggesting that this is the principal mechanism of photoprotection.
Journal ArticleDOI
Ultrafast transient absorption spectroscopy: principles and application to photosynthetic systems.
TL;DR: How a molecular understanding of the light-harvesting and photoprotective functions of carotenoids in photosynthesis is accomplished through the application of ultrafast transient absorption spectroscopy is discussed.
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An unusual pathway of excitation energy deactivation in carotenoids: Singlet-to-triplet conversion on an ultrafast timescale in a photosynthetic antenna
Claudiu C. Gradinaru,John T. M. Kennis,Emmanouil Papagiannakis,Ivo H. M. van Stokkum,Richard J. Cogdell,Graham R. Fleming,Robert A. Niederman,Rienk van Grondelle +7 more
TL;DR: It is argued that fission of the singlet state into a pair of triplet states on individual carotenoid molecules constitutes the mechanism by which the triplets are generated.
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A photoactive carotenoid protein acting as light intensity sensor
Adjélé Wilson,Adjélé Wilson,Claire Punginelli,Claire Punginelli,Andrew Gall,Andrew Gall,Cosimo Bonetti,Maxime T. A. Alexandre,Jean-Marc Routaboul,Cheryl A. Kerfeld,Rienk van Grondelle,Bruno Robert,Bruno Robert,John T. M. Kennis,Diana Kirilovsky,Diana Kirilovsky +15 more
TL;DR: It is shown that the OCP is a member of the family of photoactive proteins; it is a unique example of a photoactive protein containing a carotenoid as the photoresponsive chromophore and senses light intensity and triggers photoprotection.
Journal ArticleDOI
Hydrogen-bond switching through a radical pair mechanism in a flavin-binding photoreceptor
Magdalena Gauden,Ivo H. M. van Stokkum,Jason Key,Daniel C. Lührs,Rienk van Grondelle,Peter Hegemann,John T. M. Kennis +6 more
TL;DR: This work shows that photoactivation of BLUF domains proceeds by means of a radical-pair mechanism, driven by electron and proton transfer from the protein to the flavin, resulting in the transient formation of anionic and neutral flavin radical species that finally result in the long-lived signaling state on a 100-ps timescale.