The Structure and Function of Photosystem II

Vermaas, Wim F. J.

doi:10.1007/978-1-4684-8571-4_4

Cited by 9 publications

(1 citation statement)

References 119 publications

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“…Some of the initial, processes in photosynthesis take place in photosystem I1 (PS II), one of the major pigment-protein complexes in the thylakoid membranes, which catalyzes the light-induced reduction of plastoquinone by water via a chain of redox reactions in higher plants, algae, and cyanobacteria (Barber, 1987;Andreasson and VanngArd, 1988;Vermaas, 1988). The PS II complex is composed of a number of proteins including D1, CP47, CP43, D2, apoproteins of cytochrome b559, and the extrinsic manganese-stabilizing protein, along with a number of small proteins (Arntzen and Pakrasi, 1986;Gray et al, 1989;Vermaas, 1989).…”

Section: Introductionmentioning

confidence: 99%

Transcript Levels and Synthesis of Photosystem II Components in Cyanobacterial Mutants with Inactivated Photosystem II Genes

Yu¹,

Vermaas²

1990

The Plant Cell

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After interruption or deletion of the photosystem II genes psbB, psbC, and psbD in the cyanobacterium Synechocystis sp. PCC 6803, thylakoids from such mutants were found to be depleted in a number of photosystem II proteins in addition to those for which the gene(s) had been inactivated. Transcript levels of photosystem II genes were measured and protein pulse-labeling was carried out to determine the reason for this effect. Transcripts of all photosystem II genes except the inactivated one(s) were found to be present in the various mutants. In certain cases, inactivation of one photosystem II gene led to overexpression of another. Protein pulse-labeling experiments using 35S-methionine, in which not only the rapidly turning over D1 protein but also D2, CP43, and CP47 appear to be preferentially labeled, showed that the mutants studied synthesize the D1 protein as well as other photosystem II proteins whose genes were not inactivated. The fact that, in the various mutants, photosystem II proteins for which the gene is not inactivated are synthesized but do not accumulate in the thylakoid indicates that the psbB, psbC, and psbD gene products are all required for a stable assembly of the photosystem II complex.

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Section: Introductionmentioning

confidence: 99%

Transcript Levels and Synthesis of Photosystem II Components in Cyanobacterial Mutants with Inactivated Photosystem II Genes

Yu¹,

Vermaas²

1990

The Plant Cell

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Photosynthetic Organisms: Their Existence in Evolutionary Prospective

Saini,

Shukla,

Vishwakarma

et al. 2024

Stress Biology in Photosynthetic Organisms

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The oldest records of photosynthesis

Awramik

1992

Photosynth Res

128

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There is diverse, yet controversial fossil evidence for the existence of photosynthesis 3500 million years ago. Among the most persuasive evidence is the stromatolites described from low grade metasedimentary rocks in Western Australia and South Africa. Based on the understanding of the paleobiology of stromatolites and using pertinent fossil and Recent analogs, these Early Archean stromatolites suggest that phototrophs evolved by 3500 million years ago. The evidence allows further interpretation that cyanobacteria were involved. Besides stromatolites, microbial and chemical fossils are also known from the same rock units. Some microfossils morphologically resemble cyanobacteria and thus complement the adduced cyanobacterial involvement in stromatolite construction. If cyanobacteria had evolved by 3500 million years ago, this would indicate that nearly all prokaryotic phyla had already evolved and that prokaryotes diversified rapidly on the early Earth.

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The Structure and Function of Photosystem II

Cited by 9 publications

References 119 publications

Transcript Levels and Synthesis of Photosystem II Components in Cyanobacterial Mutants with Inactivated Photosystem II Genes

Transcript Levels and Synthesis of Photosystem II Components in Cyanobacterial Mutants with Inactivated Photosystem II Genes

Photosynthetic Organisms: Their Existence in Evolutionary Prospective

The oldest records of photosynthesis

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