Calredoxin regulates the chloroplast NADPH-dependent thioredoxin reductase in Chlamydomonas reinhardtii
Calredoxin regulates the chloroplast NADPH-dependent thioredoxin reductase in Chlamydomonas reinhardtii
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钙氧还蛋白调节莱茵衣藻叶绿体 NADPH 依赖性硫氧还蛋白还原酶
DOI:
10.1101/2022.11.22.517551
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Hippler M
中科院分区:
文献类型:
--
作者:
Zinzius K;Marchetti GM;Fischer R;Milrad Y;Oltmanns A;Kelterborn S;Yacoby I;Hegemann P;Scholz M;Hippler M
Calredoxin (CRX) is a calcium (Ca2+)-dependent thioredoxin (TRX) in the chloroplast of Chlamydomonas (Chlamydomonas reinhardtii) with a largely unclear physiological role. We elucidated the CRX functionality by performing in-depth quantitative proteomics of wild-type cells compared with acrxinsertional mutant (IMcrx), two CRISPR/Cas9 KO mutants, and CRX rescues. These analyses revealed that the chloroplast NADPH-dependent TRX reductase (NTRC) is co-regulated with CRX. Electron transfer measurements revealed that CRX inhibits NADPH-dependent reduction of oxidized chloroplast 2-Cys peroxiredoxin (PRX1) via NTRC and that the function of the NADPH-NTRC complex is under strict control of CRX. Via non-reducing SDS-PAGE assays and mass spectrometry, our data also demonstrated that PRX1 is more oxidized under high light (HL) conditions in the absence of CRX. The redox tuning of PRX1 and control of the NADPH-NTRC complex via CRX interconnect redox control with active photosynthetic electron transport and metabolism, as well as Ca2+signaling. In this way, an economic use of NADPH for PRX1 reduction is ensured. The finding that the absence of CRX under HL conditions severely inhibited light-driven CO2fixation underpins the importance of CRX for redox tuning, as well as for efficient photosynthesis.
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影响因子:
3
作者:
Marchetti GM;Fusser F;Singh RK;Brummel M;Koch O;Kummel D;Hippler M
通讯作者:
Hippler M
影响因子:
16.6
作者:
Hochmal AK;Zinzius K;Charoenwattanasatien R;Gäbelein P;Mutoh R;Tanaka H;Schulze S;Liu G;Scholz M;Nordhues A;Offenborn JN;Petroutsos D;Finazzi G;Fufezan C;Huang K;Kurisu G;Hippler M
通讯作者:
Hippler M
影响因子:
7.4
作者:
Thormaehlen, Ina;Meitzel, Tobias;Geigenberger, Peter
通讯作者:
Geigenberger, Peter
影响因子:
6.9
作者:
Pulido P;Spínola MC;Kirchsteiger K;Guinea M;Pascual MB;Sahrawy M;Sandalio LM;Dietz KJ;González M;Cejudo FJ
通讯作者:
Cejudo FJ
影响因子:
6.9
作者:
Lepistö A;Pakula E;Toivola J;Krieger-Liszkay A;Vignols F;Rintamäki E
通讯作者:
Rintamäki E