Mechanism of photoprotection in the cyanobacterial ancestor of plant antenna proteins

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F15%3A00447354" target="_blank" >RIV/60077344:_____/15:00447354 - isvavai.cz</a>

Alternative codes found

RIV/61388971:_____/15:00447354 RIV/60076658:12310/15:43888683

Result on the web

<a href="http://dx.doi.org/10.1038/nchembio.1755" target="_blank" >http://dx.doi.org/10.1038/nchembio.1755</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/nchembio.1755" target="_blank" >10.1038/nchembio.1755</a>

Result language

angličtina

Original language name

Mechanism of photoprotection in the cyanobacterial ancestor of plant antenna proteins

Original language description

Plants collect light for photosynthesis using light-harvesting complexes (LHCs)-an array of chlorophyll proteins that are able to reversibly switch from harvesting to energy-dissipation mode to prevent damage of the photosynthetic apparatus. LHC antennae as well as other members of the LHC superfamily evolved from cyanobacterial ancestors called high light-inducible proteins (Hlips). Here, we characterized a purified Hlip family member HliD isolated from the cyanobacterium Synechocystis sp. PCC 6803. We found that the HliD binds chlorophyll-a (Chl-a) and beta-carotene and exhibits an energy-dissipative conformation. Using femtosecond spectroscopy, we demonstrated that the energy dissipation is achieved via direct energy transfer from a Chl-a Q(y) state to the beta-carotene S-1 state. We did not detect any cation of beta-carotene that would accompany Chl-a quenching. These results provide proof of principle that this quenching mechanism operates in the LHC superfamily and also shed light on the photoprotective role of Hlips and the evolution of LHC antennae.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BO - Biophysics

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Nature Chemical Biology

ISSN

1552-4450

e-ISSN

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Volume of the periodical

11

Issue of the periodical within the volume

4

Country of publishing house

US - UNITED STATES

Number of pages

5

Pages from-to

287-291

UT code for WoS article

000351666500012

EID of the result in the Scopus database

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