| pubmed-article:8148649 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:8148649 | lifeskim:mentions | umls-concept:C0035567 | lld:lifeskim |
| pubmed-article:8148649 | lifeskim:mentions | umls-concept:C0028753 | lld:lifeskim |
| pubmed-article:8148649 | lifeskim:mentions | umls-concept:C0017337 | lld:lifeskim |
| pubmed-article:8148649 | lifeskim:mentions | umls-concept:C0012940 | lld:lifeskim |
| pubmed-article:8148649 | lifeskim:mentions | umls-concept:C1427146 | lld:lifeskim |
| pubmed-article:8148649 | lifeskim:mentions | umls-concept:C0086860 | lld:lifeskim |
| pubmed-article:8148649 | lifeskim:mentions | umls-concept:C0013879 | lld:lifeskim |
| pubmed-article:8148649 | lifeskim:mentions | umls-concept:C0699759 | lld:lifeskim |
| pubmed-article:8148649 | lifeskim:mentions | umls-concept:C1704788 | lld:lifeskim |
| pubmed-article:8148649 | lifeskim:mentions | umls-concept:C0380098 | lld:lifeskim |
| pubmed-article:8148649 | lifeskim:mentions | umls-concept:C0283910 | lld:lifeskim |
| pubmed-article:8148649 | pubmed:issue | 2 | lld:pubmed |
| pubmed-article:8148649 | pubmed:dateCreated | 1994-5-11 | lld:pubmed |
| pubmed-article:8148649 | pubmed:databankReference | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:8148649 | pubmed:abstractText | Phytochrome-imposed down-regulation of the expression of its own phytochrome A gene (PHYA) is one of the fastest light-induced effects on transcription reported in plants to date. Functional analysis of the oat PHYA3 promoter in a transfection assay has revealed two positive elements, PE1 and PE3, that function synergistically to support high levels of transcription in the absence of light. We have isolated a rice cDNA clone (pR4) encoding a DNA binding protein that binds to the AT-rich PE1 element. We tested the selectivity of the pR4-encoded DNA binding activity using linker substitution mutations of PE1 that are known to disrupt positive expression supported by the PHYA3 promoter in vivo. Binding to these linker substitution mutants was one to two orders of magnitude less than to the native PE1 element. Because this is the behavior expected of positive factor 1 (PF1), the presumptive nuclear transcription factor that acts in trans at the PE1 element in vivo, the data support the conclusion that the protein encoded by pR4 is in fact rice PF1. The PF1 polypeptide encoded by pR4 is 213 amino acids long and contains four repeats of the A-T hook DNA binding motif found in high-mobility group I-Y (HMGI-Y) proteins. In addition, PF1 contains an 11-amino acid-long hydrophobic region characteristic of HMG I proteins, its N-terminal region shows strong similarities to a pea H1 histone sequence and a short peptide sequence from wheat HMGa, and it shows a high degree of similarity along its entire length to the HMG Y-like protein encoded by a soybean cDNA, SB16. In vitro footprinting and quantitative gel shift analyses showed that PF1 binds preferentially to the PE1 element but also at lower affinity to two other AT-rich regions upstream of PE1. This feature is consistent with the binding characteristics of HMG I-Y proteins that are known to bind to most runs of six or more AT base pairs. Taken together, the properties of PF1 suggest that it belongs to a newly described family of nuclear proteins containing both histone H1 domains and A-T hook DNA binding domains. | lld:pubmed |
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| pubmed-article:8148649 | pubmed:language | eng | lld:pubmed |
| pubmed-article:8148649 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:8148649 | pubmed:citationSubset | IM | lld:pubmed |
| pubmed-article:8148649 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:8148649 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:8148649 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:8148649 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
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| pubmed-article:8148649 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:8148649 | pubmed:month | Feb | lld:pubmed |
| pubmed-article:8148649 | pubmed:issn | 1040-4651 | lld:pubmed |
| pubmed-article:8148649 | pubmed:author | pubmed-author:QuailP HPH | lld:pubmed |
| pubmed-article:8148649 | pubmed:author | pubmed-author:Nieto-SoteloJ... | lld:pubmed |
| pubmed-article:8148649 | pubmed:author | pubmed-author:IchidaAA | lld:pubmed |
| pubmed-article:8148649 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:8148649 | pubmed:volume | 6 | lld:pubmed |
| pubmed-article:8148649 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:8148649 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:8148649 | pubmed:pagination | 287-301 | lld:pubmed |
| pubmed-article:8148649 | pubmed:dateRevised | 2010-9-10 | lld:pubmed |
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