Gene Psba
Mostrando 1-12 de 111 artigos, teses e dissertações.
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1. Caracterização molecular de acessos de capim-colchão (Digitaria nuda) e resposta à ametrina
As espécies de Digitaria são plantas daninhas nas lavouras de cana-de-açúcar no Brasil e estão sendo controladas com herbicidas, porém há alguns relatos de falha no controle, notavelmente ao grupo das triazinas. Técnicas moleculares são recomendadas para análise da variabilidade genética em plantas daninhas, como o RAPD (DNA Polimórfico Amplifica
Acta Sci., Agron.. Publicado em: 2010-06
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2. Activation of the silent psbA1 gene in the cyanobacterium Synechocystis sp strain 6803 produces a novel and functional D1 protein.
The photosystem II reaction center protein D1 in Synechocystis sp strain 6803 is encoded by the psbA2 and psbA3 genes of the three-membered psbA gene family. The silent and divergent psbA1 copy of the psbA gene family was activated by exchanging part of its upstream region with a corresponding fragment of the psbA2 copy. The light-regulated expression of the
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3. The atypical codon usage of the plant psbA gene may be the remnant of an ancestral bias
The psbA gene of the chloroplast genome has a codon usage that is unusual for plant chloroplast genes. In the present study the evolutionary status of this codon usage is tested by reconstructing putative ancestral psbA sequences to determine the pattern of change in codon bias during angiosperm divergence. It is shown that the codon biases of the ancestral
The National Academy of Sciences of the USA.
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4. Novel psbA1 Gene from a Naturally Occurring Atrazine-Resistant Cyanobacterial Isolate
A naturally occurring atrazine-resistant cyanobacterial isolate, strain SG2, was isolated from an atrazine-containing wastewater treatment system at the Syngenta atrazine production facility in St. Gabriel, La. Strain SG2 was resistant to 1,000 μg of atrazine per ml but showed relatively low resistance to diuron [3-(3,4-dichlorophenyl)-1,1-dimethyl urea]. A
American Society for Microbiology.
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5. In vitro expression and characterization of the translation start site of the psbA gene product (QB protein) from higher plants.
The psbA gene from higher plants, which codes for the atrazine herbicide binding protein of photosystem II (QB protein), has been recently sequenced by various laboratories. From these data there are two potential translation sites, one yielding a protein of 38,500 kd and another a protein of 34,500 kd. In the present study, cloned psbA gene sequences from m
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6. Relocating a gene for herbicide tolerance: A chloroplast gene is converted into a nuclear gene
The chloroplast gene psbA codes for the photosynthetic quinone-binding membrane protein QB, which is the target of the herbicide atrazine. This gene has been converted into a nuclear gene. The psbA gene from an atrazine-resistant biotype of Amaranthus hybridus has been modified by fusing its coding region to transcription-regulation and transit-peptide-encod
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7. Differential expression of members of a cyanobacterial psbA gene family in response to light.
The genome of the cyanobacterium Synechococcus sp. strain PCC 7942 contains three psbA genes encoding two forms of the D1 protein: form I, the product of psbAI, differs from form II, the product of both psbAII and psbAIII, at 25 of 360 residues. D1 is essential for photosynthesis as a core component of the photosystem II reaction center. Translational gene f
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8. Chlamydomonas reinhardii gene for the 32 000 mol. wt. protein of photosystem II contains four large introns and is located entirely within the chloroplast inverted repeat
The chloroplast psbA gene from the green unicellular alga Chlamydomonas reinhardii has been localized, cloned and sequenced. This gene codes for the rapidly-labeled 32-kd protein of photosystem II, also identified as as herbicide-binding protein. Unlike psbA in higher plants which is found in the large single copy region of the chloroplast genome and is unin
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9. Chloroplast gene for Mr 32000 polypeptide of photosystem II in Euglena gracilis is interrupted by four introns with conserved boundary sequences.
The gene for the Mr 32000 herbicide binding polypeptide of photosystem II has previously been mapped to the 5 kbp EcoRI fragment Eco I of Euglena gracilis chloroplast DNA. The nucleotide sequence of 3324 bp of Eco I, containing the psbA locus, has been determined. This locus encodes a polypeptide of 345 amino acids which is co-linear with, and has 86% derive
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10. Construction of an Obligate Photoheterotrophic Mutant of the Cyanobacterium Synechocystis 6803 1: Inactivation of the psbA Gene Family
psbA in Synechocystis 6803 was found to belong to a small multigene family with three copies. The psbA gene family was inactivated in vitro by insertation of bacterial drug resistance markers. Inactivation of all three genes resulted in a transformant that is unable to grow photosynthetically but can be cultured photoheterotrophically. This mutant lacks oxyg
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11. Expression of a higher plant psbA gene in Synechocystis 6803 yields a functional hybrid photosystem II reaction center complex.
The psbA gene codes for the D1 polypeptide of the photosystem II reaction center complex and is found in all photosynthetic organisms that carry out oxygenic photosynthesis. Here we describe the construction and characterization of a strain of the cyanobacterium Synechocystis sp PCC 6803 in which the three endogenous psbA genes are replaced by a single psbA
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12. Light regulated translational activators: identification of chloroplast gene specific mRNA binding proteins.
Genetic analysis has revealed a set of nuclear-encoded factors that regulate chloroplast mRNA translation by interacting with the 5' leaders of chloroplastic mRNAs. We have identified and isolated proteins that bind specifically to the 5' leader of the chloroplastic psbA mRNA, encoding the photosystem II reaction center protein D1. Binding of these proteins