A LHCB9-dependent photosystem I megacomplex induced under low light in Physcomitrella patens

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F18%3A73590918" target="_blank" >RIV/61989592:15310/18:73590918 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1038/s41477-018-0270-2" target="_blank" >http://dx.doi.org/10.1038/s41477-018-0270-2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41477-018-0270-2" target="_blank" >10.1038/s41477-018-0270-2</a>

Result language

angličtina

Original language name

A LHCB9-dependent photosystem I megacomplex induced under low light in Physcomitrella patens

Original language description

Photosystem I of the moss Physcomitrella patens has special properties, including the capacity to undergo non-photochemical fluorescence quenching. We studied the organization of photosystem I under different light and carbon supply conditions in wild-type moss and in moss with the lhcb9 (light-harvesting complex) knockout genotype, which lacks an antenna protein endowed with red-shifted absorption forms. Wild-type moss, when grown on sugars and in low light, accumulated LHCB9 proteins and a large form of the photosystem I supercomplex, which, besides the canonical four LHCI subunits, included a LHCII trimer and four additional LHC monomers. The lhcb9 knockout produced an angiosperm-like photosystem I supercomplex with four LHCI subunits irrespective of the growth conditions. Growth in the presence of sublethal concentrations of electron transport inhibitors that caused oxidation or reduction of the plastoquinone pool prevented or promoted, respectively, the accumulation of LHCB9 and the formation of the photosystem I megacomplex. We suggest that LHCB9 is a key subunit regulating the antenna size of photosystem I and the ability to avoid the over-reduction of plastoquinone: this condition is potentially dangerous in the shaded and sunfleck-rich environment typical of mosses, whose plastoquinone pool is reduced by both photosystem II and the oxidation of sugar substrates.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10610 - Biophysics

Project

<a href="/en/project/LO1204" target="_blank" >LO1204: Sustainable development of research in the Centre of the Region Haná</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

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

Name of the periodical

Nature Plants

ISSN

2055-026X

e-ISSN

—

Volume of the periodical

2018

Issue of the periodical within the volume

4

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

910-919

UT code for WoS article

000452308700018

EID of the result in the Scopus database

2-s2.0-85056001552