Tandem gene amplification restores photosystem II accumulation in cytochrome b(559) mutants of cyanobacteria
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388971%3A_____%2F22%3A00553481" target="_blank" >RIV/61388971:_____/22:00553481 - isvavai.cz</a>
Výsledek na webu
<a href="https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.17785" target="_blank" >https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.17785</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1111/nph.17785" target="_blank" >10.1111/nph.17785</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Tandem gene amplification restores photosystem II accumulation in cytochrome b(559) mutants of cyanobacteria
Popis výsledku v původním jazyce
Cytochrome (Cyt) b(559) is a key component of the photosystem II complex (PSII) that is essential for its proper functioning and assembly. Site-directed mutants of the model cyanobacterium Synechocystis sp. PCC6803 with mutated heme axial ligands of Cyt b(559) have little PSII and are therefore unable to grow photoautotrophically. Here we describe two types of Synechocystis autotrophic transformants that retained the same mutations in Cyt b(559) but are able to accumulate PSII and grow photoautotrophically. Whole-genome sequencing revealed that all of these autotrophic transformants carried a variable number of tandem repeats (from 5 to 15) of chromosomal segments containing the psbEFLJ operon. RNA-seq analysis showed greatly increased transcript levels of the psbEFLJ operon in these autotrophic transformants. Multiple copies of the psbEFLJ operon in these transformants were only maintained during autotrophic growth, while its copy numbers gradually decreased under photoheterotrophic conditions. Two-dimensional PAGE analysis of membrane proteins revealed a strong deficiency in PSII complexes in the Cyt b(559) mutants that was reversed in the autotrophic transformants. These results illustrate how tandem gene amplification restores PSII accumulation and photoautotrophic growth in Cyt b(559) mutants of cyanobacteria, and may serve as an important adaptive mechanism for cyanobacterial survival.
Název v anglickém jazyce
Tandem gene amplification restores photosystem II accumulation in cytochrome b(559) mutants of cyanobacteria
Popis výsledku anglicky
Cytochrome (Cyt) b(559) is a key component of the photosystem II complex (PSII) that is essential for its proper functioning and assembly. Site-directed mutants of the model cyanobacterium Synechocystis sp. PCC6803 with mutated heme axial ligands of Cyt b(559) have little PSII and are therefore unable to grow photoautotrophically. Here we describe two types of Synechocystis autotrophic transformants that retained the same mutations in Cyt b(559) but are able to accumulate PSII and grow photoautotrophically. Whole-genome sequencing revealed that all of these autotrophic transformants carried a variable number of tandem repeats (from 5 to 15) of chromosomal segments containing the psbEFLJ operon. RNA-seq analysis showed greatly increased transcript levels of the psbEFLJ operon in these autotrophic transformants. Multiple copies of the psbEFLJ operon in these transformants were only maintained during autotrophic growth, while its copy numbers gradually decreased under photoheterotrophic conditions. Two-dimensional PAGE analysis of membrane proteins revealed a strong deficiency in PSII complexes in the Cyt b(559) mutants that was reversed in the autotrophic transformants. These results illustrate how tandem gene amplification restores PSII accumulation and photoautotrophic growth in Cyt b(559) mutants of cyanobacteria, and may serve as an important adaptive mechanism for cyanobacterial survival.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10606 - Microbiology
Návaznosti výsledku
Projekt
<a href="/cs/project/GX19-29225X" target="_blank" >GX19-29225X: Provázaná biogeneze fotosystémů I a II: společně zrozeni ke společné práci</a><br>
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2022
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
New Phytologist
ISSN
0028-646X
e-ISSN
1469-8137
Svazek periodika
233
Číslo periodika v rámci svazku
2
Stát vydavatele periodika
GB - Spojené království Velké Británie a Severního Irska
Počet stran výsledku
15
Strana od-do
766-780
Kód UT WoS článku
000712906000001
EID výsledku v databázi Scopus
2-s2.0-85118240989