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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
2
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pubmed:dateCreated |
1998-10-8
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pubmed:abstractText |
Two new loci have been found to be clustered with five other genes for the nitrate assimilation pathway in the Chlamydomonas reinhardtii genome. One gene, located close to the 3'-end of the high-affinity nitrate transporter (HANT) gene Nrt 2; 2, corresponds to the nitrite reductase (NiR) structural gene Nii1. This is supported by a number of experimental findings: (i) NiR-deficient mutants have lost Nii1 gene expression; (ii) Nii1 mRNA accumulation is co-regulated with the expression of other structural genes of the nitrate assimilation pathway; (iii) nitrite (nitrate) utilization ability is recovered in the NiR mutants by functional complementation with a wild-type Nii1 gene; (iv) the elucidated NII1 amino acid sequence is highly similar to that of the cyanobacterial and higher-plant enzyme, and contains the predicted domains for plastidic ferredoxin-NiRs. Thus, the mutant phenotype and the mRNA sequence and expression of the Nii1 gene have been unequivocally related. Accumulation of mRNA for the second locus identified. Lde1 (light-dependent expression), was not regulated by nitrogen, but like nitrate-assimilation clustered genes, its expression was down-regulated in the dark.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical | |
pubmed:status |
MEDLINE
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pubmed:month |
Oct
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pubmed:issn |
0032-0935
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
206
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
259-65
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pubmed:dateRevised |
2006-11-15
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pubmed:meshHeading |
pubmed-meshheading:9737004-Amino Acid Sequence,
pubmed-meshheading:9737004-Animals,
pubmed-meshheading:9737004-Chlamydomonas reinhardtii,
pubmed-meshheading:9737004-Cloning, Molecular,
pubmed-meshheading:9737004-DNA, Complementary,
pubmed-meshheading:9737004-Gene Expression Regulation, Enzymologic,
pubmed-meshheading:9737004-Genes,
pubmed-meshheading:9737004-Light,
pubmed-meshheading:9737004-Molecular Sequence Data,
pubmed-meshheading:9737004-Multigene Family,
pubmed-meshheading:9737004-Nitrates,
pubmed-meshheading:9737004-Nitrite Reductases,
pubmed-meshheading:9737004-Polymorphism, Genetic,
pubmed-meshheading:9737004-Sequence Homology, Amino Acid,
pubmed-meshheading:9737004-Transcription, Genetic
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pubmed:year |
1998
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pubmed:articleTitle |
Clustering of the nitrite reductase gene and a light-regulated gene with nitrate assimilation loci in Chlamydomonas reinhardtii.
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pubmed:affiliation |
Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias, Universidad de Córdoba, Spain.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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