Details
| Original language | English |
|---|---|
| Pages (from-to) | 625-628 |
| Number of pages | 4 |
| Journal | NATURE |
| Volume | 397 |
| Issue number | 6720 |
| Publication status | Published - 18 Feb 1999 |
| Externally published | Yes |
Abstract
Redox chemistry-the transfer of electrons or hydrogen atoms--is central to energy conversion in respiration and photosynthesis. In photosynthesis in chloroplasts, two separate, light-driven reactions, termed photosystem I and photosystem II, are connected in series by a chain of electron carriers. The redox state of one connecting electron carrier, plastoquinone, governs the distribution of absorbed light energy between photosystems I and II by controlling the phosphorylation of a mobile, light-harvesting, pigment- protein complex. Here we show that the redox state of plastoquinone also controls the rate of transcription of genes encoding reaction-centre apoproteins of photosystem I and photosystem II. As a result of this control, the stoichiometry between the two photosystems changes in a way that counteracts the inefficiency produced when either photosystem limits the rate of the other. In eukaryotes, these reaction-centre proteins are encoded universally within the chloroplast. Photosynthetic control of chloroplast gene expression indicates an evolutionary explanation for this rule: the redox signal-transduction pathway can be short, the response rapid, and the control direct.
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In: NATURE, Vol. 397, No. 6720, 18.02.1999, p. 625-628.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Photosynthetic control of chloroplast gene expression
AU - Pfannschmidt, Thomas
AU - Nilsson, Anders
AU - Allen, John F.
PY - 1999/2/18
Y1 - 1999/2/18
N2 - Redox chemistry-the transfer of electrons or hydrogen atoms--is central to energy conversion in respiration and photosynthesis. In photosynthesis in chloroplasts, two separate, light-driven reactions, termed photosystem I and photosystem II, are connected in series by a chain of electron carriers. The redox state of one connecting electron carrier, plastoquinone, governs the distribution of absorbed light energy between photosystems I and II by controlling the phosphorylation of a mobile, light-harvesting, pigment- protein complex. Here we show that the redox state of plastoquinone also controls the rate of transcription of genes encoding reaction-centre apoproteins of photosystem I and photosystem II. As a result of this control, the stoichiometry between the two photosystems changes in a way that counteracts the inefficiency produced when either photosystem limits the rate of the other. In eukaryotes, these reaction-centre proteins are encoded universally within the chloroplast. Photosynthetic control of chloroplast gene expression indicates an evolutionary explanation for this rule: the redox signal-transduction pathway can be short, the response rapid, and the control direct.
AB - Redox chemistry-the transfer of electrons or hydrogen atoms--is central to energy conversion in respiration and photosynthesis. In photosynthesis in chloroplasts, two separate, light-driven reactions, termed photosystem I and photosystem II, are connected in series by a chain of electron carriers. The redox state of one connecting electron carrier, plastoquinone, governs the distribution of absorbed light energy between photosystems I and II by controlling the phosphorylation of a mobile, light-harvesting, pigment- protein complex. Here we show that the redox state of plastoquinone also controls the rate of transcription of genes encoding reaction-centre apoproteins of photosystem I and photosystem II. As a result of this control, the stoichiometry between the two photosystems changes in a way that counteracts the inefficiency produced when either photosystem limits the rate of the other. In eukaryotes, these reaction-centre proteins are encoded universally within the chloroplast. Photosynthetic control of chloroplast gene expression indicates an evolutionary explanation for this rule: the redox signal-transduction pathway can be short, the response rapid, and the control direct.
UR - http://www.scopus.com/inward/record.url?scp=0033580325&partnerID=8YFLogxK
U2 - 10.1038/17624
DO - 10.1038/17624
M3 - Article
AN - SCOPUS:0033580325
VL - 397
SP - 625
EP - 628
JO - NATURE
JF - NATURE
SN - 0028-0836
IS - 6720
ER -