8qi8

Structural highlights

Function

PHOT_CHLRE Protein kinase that acts as a blue light photoreceptor (PubMed:15695460, PubMed:24285544). Required for non-photochemical quenching (NPQ), a mechanism that converts and dissipates the harmful excess absorbed light energy into heat and protect the photosynthetic apparatus from photo-oxidative damage (PubMed:27626383). Controls the energy-dependent chlorophyll fluorescence quenching (qE) activity of chlorophyll excited states by inducing the expression of the qE effector protein LHCSR3 in high light intensities (PubMed:27626383).^{[1] [2] [3]}

References

1. ↑ Onodera A, Kong SG, Doi M, Shimazaki K, Christie J, Mochizuki N, Nagatani A. Phototropin from Chlamydomonas reinhardtii is functional in Arabidopsis thaliana. Plant Cell Physiol. 2005 Feb;46(2):367-74. PMID:15695460 doi:10.1093/pcp/pci037
2. ↑ Okajima K, Aihara Y, Takayama Y, Nakajima M, Kashojiya S, Hikima T, Oroguchi T, Kobayashi A, Sekiguchi Y, Yamamoto M, Suzuki T, Nagatani A, Nakasako M, Tokutomi S. Light-induced conformational changes of LOV1 (light oxygen voltage-sensing domain 1) and LOV2 relative to the kinase domain and regulation of kinase activity in Chlamydomonas phototropin. J Biol Chem. 2014 Jan 3;289(1):413-22. PMID:24285544 doi:10.1074/jbc.M113.515403
3. ↑ Petroutsos D, Tokutsu R, Maruyama S, Flori S, Greiner A, Magneschi L, Cusant L, Kottke T, Mittag M, Hegemann P, Finazzi G, Minagawa J. A blue-light photoreceptor mediates the feedback regulation of photosynthesis. Nature. 2016 Sep 22;537(7621):563-566. PMID:27626383 doi:10.1038/nature19358