Photosystem I

I. Grotjohann; Petra Fromme

doi:10.1016/B978-0-12-378630-2.00287-5

Photosystem I

I. Grotjohann, Petra Fromme

Research output: Chapter in Book/Report/Conference proceeding › Chapter

2 Scopus citations

Abstract

Photosystem I (PSI) is one of the key players in the process of oxygenic photosynthesis. This large membrane protein complex utilizes light energy to transfer electrons from the lumenal electron carriers plastocyanin or cytochrome c₆ across the photosynthetic membrane to the stromal/cytosolic electron carriers ferredoxin or flavodoxin. The resulting proton gradient is used for adenosine triphosphate (ATP) production by the ATP synthase, while the electrons end up in carbon fixation. With a molecular weight of 1 million Da, trimeric cyanobacterial PSI is one of the largest membrane protein complexes with known structure. About one-third of its molecular weight comes from cofactors, mainly chlorophylls, and also carotenoids, phylloqinones, and iron-sulfur clusters.

Original language	English (US)
Title of host publication	Encyclopedia of Biological Chemistry
Subtitle of host publication	Second Edition
Publisher	Elsevier Inc.
Pages	503-507
Number of pages	5
ISBN (Electronic)	9780123786319
ISBN (Print)	9780123786302
DOIs	https://doi.org/10.1016/B978-0-12-378630-2.00287-5
State	Published - Feb 15 2013

Keywords

Charge separation
Chlorophyll
Cytochrom c
Electrochemical gradient
Electron transfer chain
Excitation energy transfer
Ferredoxin
Flavodoxin
Iron-sulfur cluster
Oxygenic photosynthesis
Photosynthesis
Photosystem
Photosystem I
Phylloquinone
Plastocyanin
PSI

ASJC Scopus subject areas

Biochemistry, Genetics and Molecular Biology(all)

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10.1016/B978-0-12-378630-2.00287-5

Cite this

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title = "Photosystem I",

abstract = "Photosystem I (PSI) is one of the key players in the process of oxygenic photosynthesis. This large membrane protein complex utilizes light energy to transfer electrons from the lumenal electron carriers plastocyanin or cytochrome c6 across the photosynthetic membrane to the stromal/cytosolic electron carriers ferredoxin or flavodoxin. The resulting proton gradient is used for adenosine triphosphate (ATP) production by the ATP synthase, while the electrons end up in carbon fixation. With a molecular weight of 1 million Da, trimeric cyanobacterial PSI is one of the largest membrane protein complexes with known structure. About one-third of its molecular weight comes from cofactors, mainly chlorophylls, and also carotenoids, phylloqinones, and iron-sulfur clusters.",

keywords = "Charge separation, Chlorophyll, Cytochrom c, Electrochemical gradient, Electron transfer chain, Excitation energy transfer, Ferredoxin, Flavodoxin, Iron-sulfur cluster, Oxygenic photosynthesis, Photosynthesis, Photosystem, Photosystem I, Phylloquinone, Plastocyanin, PSI",

author = "I. Grotjohann and Petra Fromme",

year = "2013",

month = feb,

day = "15",

doi = "10.1016/B978-0-12-378630-2.00287-5",

language = "English (US)",

isbn = "9780123786302",

pages = "503--507",

booktitle = "Encyclopedia of Biological Chemistry",

publisher = "Elsevier Inc.",

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TY - CHAP

T1 - Photosystem I

AU - Grotjohann, I.

AU - Fromme, Petra

PY - 2013/2/15

Y1 - 2013/2/15

N2 - Photosystem I (PSI) is one of the key players in the process of oxygenic photosynthesis. This large membrane protein complex utilizes light energy to transfer electrons from the lumenal electron carriers plastocyanin or cytochrome c6 across the photosynthetic membrane to the stromal/cytosolic electron carriers ferredoxin or flavodoxin. The resulting proton gradient is used for adenosine triphosphate (ATP) production by the ATP synthase, while the electrons end up in carbon fixation. With a molecular weight of 1 million Da, trimeric cyanobacterial PSI is one of the largest membrane protein complexes with known structure. About one-third of its molecular weight comes from cofactors, mainly chlorophylls, and also carotenoids, phylloqinones, and iron-sulfur clusters.

AB - Photosystem I (PSI) is one of the key players in the process of oxygenic photosynthesis. This large membrane protein complex utilizes light energy to transfer electrons from the lumenal electron carriers plastocyanin or cytochrome c6 across the photosynthetic membrane to the stromal/cytosolic electron carriers ferredoxin or flavodoxin. The resulting proton gradient is used for adenosine triphosphate (ATP) production by the ATP synthase, while the electrons end up in carbon fixation. With a molecular weight of 1 million Da, trimeric cyanobacterial PSI is one of the largest membrane protein complexes with known structure. About one-third of its molecular weight comes from cofactors, mainly chlorophylls, and also carotenoids, phylloqinones, and iron-sulfur clusters.

KW - Charge separation

KW - Chlorophyll

KW - Cytochrom c

KW - Electrochemical gradient

KW - Electron transfer chain

KW - Excitation energy transfer

KW - Ferredoxin

KW - Flavodoxin

KW - Iron-sulfur cluster

KW - Oxygenic photosynthesis

KW - Photosynthesis

KW - Photosystem

KW - Photosystem I

KW - Phylloquinone

KW - Plastocyanin

KW - PSI

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U2 - 10.1016/B978-0-12-378630-2.00287-5

DO - 10.1016/B978-0-12-378630-2.00287-5

M3 - Chapter

AN - SCOPUS:85042776369

SN - 9780123786302

SP - 503

EP - 507

BT - Encyclopedia of Biological Chemistry

PB - Elsevier Inc.

ER -

Photosystem I

Abstract

Keywords

ASJC Scopus subject areas

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