Source:http://linkedlifedata.com/resource/pubmed/id/16666778
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
2
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| pubmed:dateCreated |
2010-6-29
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| pubmed:abstractText |
Phytochrome is rapidly degraded in vivo after photoconversion from the stable red-absorbing (Pr) form to the far red-absorbing (Pfr) form. Previously, we have shown in etiolated oat seedlings that ubiquitin-phytochrome conjugates (Ub-P) appear after Pfr formation suggesting that oat phytochrome is rapidly degraded by a ubiquitin-dependent proteolytic pathway. Here, we extend this observation to etiolated tissue from other monocotyledonous (corn [Zea mays. (L.)] and rye [Secale cereale (L.)] and dicotyledonous species (pea [Pisum sativum (L,)] and zucchini squash [Cucurbita pepo (L.)]). Following Pfr formation by red light, all four species synthesized a heterogeneous series of Ub-P that appeared and disappeared concomitant with the degradation of the chromoprotein. When Pfr was photoconverted back to Pr by a far-red light pulse, degradation of phytochrome ceased and the levels of Ub-P concomitantly dropped. In pea and zucchini squash, loss of Ub-P after photoconversion of Pfr back to Pr was rapid, occurring with a half-life of approximately 5 to 10 minutes. These data indicate that the accumulation of Ub-P after Pfr formation is a general phenomenon in etiolated seedlings of higher plants and further support the hypothesis that plants degrade Pfr via Ub-P intermediates.
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| pubmed:commentsCorrections |
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666778-16593800,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666778-16655825,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666778-16657731,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666778-16658512,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666778-16660790,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666778-16660958,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666778-16662975,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666778-16664177,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666778-2538468,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666778-3025922,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666778-4212932,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666778-5432063,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666778-6885811
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
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| pubmed:month |
Jun
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| pubmed:issn |
0032-0889
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| pubmed:author | |
| pubmed:issnType |
Print
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| pubmed:volume |
90
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| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
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| pubmed:pagination |
380-4
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| pubmed:dateRevised |
2010-9-15
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| pubmed:year |
1989
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| pubmed:articleTitle |
Red light-induced accumulation of ubiquitin-phytochrome conjugates in both monocots and dicots.
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| pubmed:affiliation |
Department of Horticulture, University of Wisconsin-Madison, Madison, Wisconsin 53706.
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| pubmed:publicationType |
Journal Article
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