Structure and organization of Marchantia olymorpha chloroplast genome

Kohchi, Takayuki; Shirai, Hiroyuki; Fukuzawa, Hideya; Sano, Tomoaki; Komano, Tohru; Umesono, Kazuhiko; Inokuchi, Hachiro; Ozeki, Haruo; Ohyama, Kanji

doi:10.1016/0022-2836(88)90004-6

Cited by 66 publications

(25 citation statements)

References 65 publications

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“…The CysW polypeptide is slightly less homologous to this plastid-encoded polypeptide. The mbp Y gene, localized to the small single-copy region of the chloroplast genome (27) (55). Much of this similarity is concentrated in six regions of these polypeptides, two of which are believed to be involved in the binding of ATP (3).…”

Section: Methodsmentioning

confidence: 99%

Characterization and mutagenesis of sulfur-regulated genes in a cyanobacterium: evidence for function in sulfate transport

1991

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A sulfur-regulated gene (cysA) that encodes the membrane-associated ATP-binding protein of the sulfate transport system of the cyanobacterium Synechococcus sp. strain PCC 7942 was recently isolated and sequenced. Adjacent to cysA and transcribed in the opposite direction is a gene encoding the sulfate-binding protein (sbpA Cyanobacteria are obligate photoautotrophs that undergo a complex set of distinct morphological and physiological changes when deprived of macronutrients such as sulfur and nitrogen. A visually dramatic response to nutrient deprivation is the degradation of the light-harvesting complex, the phycobilisome, and the concomitant decline in the levels of phycocyanin and allophycocyanin. Additionally, there is a decrease in chlorophyll levels and attenuation of the photosynthetic membranes (44, 60). Other changes that accompany nutrient deprivation include cell wall thickening (25) and the accumulation of electron-opaque inclusion bodies in the cytoplasm of the cell (31, 60).In addition to the general responses described above, cyanobacteria exhibit specific responses when deprived of a given nutrient. During growth in sulfur-deficient medium, the unicellular cyanobacterium Anacystis nidulans and the closely related Synechococcus sp. strain PCC 7942 display an increased rate of sulfate transport (15,24 In the enteric bacteria Salmonella typhimurium and Escherichia coli, sulfate transport is accomplished by a single active uptake system. This permease complex is composed of three cytoplasmic membrane components and a substratespecific binding protein located in the periplasmic space (3, 28). The sulfate-binding protein of S. typhimurium has been isolated and sequenced and its crystal structure has been resolved (23,36,40). It is present in the periplasmic space at very high levels and binds one sulfate molecule per molecule of protein. Two of the cytoplasmic membrane proteins appear to span the lipid bilayer and may form a channel for the passage of the substrate. A third membrane protein hydrolyzes ATP to provide the energy required for concentrating the substrate inside the cell (4).Much of the information on sulfate uptake in enteric bacteria has accrued from studies of cysteine auxotrophs. Mutations that block sulfate transport map to the cysA locus; all three cistrons in this locus are required for normal uptake (34,35 In this communication, we present a characterization of the region of DNA adjacent to cysA and conclude that it encodes the remaining components of the sulfate permease. These conclusions are based on homology to analogous polypeptides from both the sulfate permease system of S. typhimurium and E. coli and the phenotype of mutant strains

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Section: Methodsmentioning

confidence: 99%

Characterization and mutagenesis of sulfur-regulated genes in a cyanobacterium: evidence for function in sulfate transport

1991

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“…Genes for LIPOR subunits have been characterized for a number of "primary" plastid-containing eukaryotes, including green algae (9,31), mosses (e.g., a Marchantia sp. [15]), the glaucophyte Cyanophora paradoxa (32), and the red alga Porphyra purpurea (29), but are absent in the plastid genome of the red alga Cyanidioschyzon merolae (23). Angiosperms have also lost LIPOR genes, although some species are capable of synthesizing chlorophyll in the dark using an as yet unknown mechanism (1).…”

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Evolutionary Dynamics of Light-Independent Protochlorophyllide Oxidoreductase Genes in the Secondary Plastids of Cryptophyte Algae

Fong

Archibald

2008

Eukaryot Cell

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“…The chlL gene appears to be essential for the activity of DPOR (5,14,15); indeed, the chlorophyll remaining in the chlL-deletion mutant of Synechocystis sp. PCC 6803 is likely to result from chlorophyll remaining from its light incubation, together with what is synthesized during the periods of light that occur during LAHG growth.…”

Section: Discussionmentioning

confidence: 99%

Partial Recovery of Light‐Independent Chlorophyll Biosynthesis in the chlL ‐Deletion Mutant of Synechocystis sp. PCC 6803

Yu²,

Zhao

2001

IUBMB Life

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SummaryA chlL-deletion mutant of Synechocystis sp. PCC 6803 designated as chlL ¡ was unable to make signi cant amounts of chlorophyll in darkness. However, an apparent pseudorevertant has been generated spontaneously that can synthesize an increased amount of chlorophyll under light-activated heterotrophic growth conditions. Under these conditions, the chlorophyll content in this pseudorevertant was about 20% of that in the wild-type strain and about 4 times more than that in the original and in the recently recreated chlL-deletion mutant. This is paralleled by increased performance of dark-grown cells in terms of chlorophyll uorescence induction and oxygen evolution rates in the pseudorevertant versus in the original mutant. PCR analysis con rmed that the chlL ¡ -pseudorevertant mutant still lacked the chlL gene. These results imply that the light-independent chlorophyll biosynthesis pathway was partly recovered.

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Structure and organization of Marchantia olymorpha chloroplast genome

Cited by 66 publications

References 65 publications

Characterization and mutagenesis of sulfur-regulated genes in a cyanobacterium: evidence for function in sulfate transport

Characterization and mutagenesis of sulfur-regulated genes in a cyanobacterium: evidence for function in sulfate transport

Evolutionary Dynamics of Light-Independent Protochlorophyllide Oxidoreductase Genes in the Secondary Plastids of Cryptophyte Algae

Partial Recovery of Light‐Independent Chlorophyll Biosynthesis in the chlL ‐Deletion Mutant of Synechocystis sp. PCC 6803

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