Source:http://linkedlifedata.com/resource/pubmed/id/15876463
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
1
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pubmed:dateCreated |
2005-5-23
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pubmed:abstractText |
The intercoding regions between many Leishmania sp. genes regulate their mRNA expression. The MSPL mRNA, encoding a subclass of the major surface protease (MSP) of Leishmania chagasi, increases in abundance, when protein synthesis is arrested, while alpha-tubulin (alpha-TUB) mRNA and most other mRNAs do not. We found that the intercoding region between MSPL-coding regions, when cloned downstream of the beta-galactosidase reporter gene (beta-GAL), caused beta-GAL mRNA to increase 8- to 10-fold after inhibiting protein synthesis with cycloheximide. Stable L. chagasi transfectants containing hybrid MSPL/alpha-TUB intercoding regions cloned downstream of beta-GAL were made. The alpha-TUB intercoding region induced high-level baseline beta-GAL mRNA that increased only 1.3-fold after incubation with cycloheximide. In contrast, the MSPL intercoding region, as well as constructs containing nucleotides 303-505 from the MSPL 3'UTR, caused steady-state beta-GAL mRNA levels in the absence of cycloheximide that were approximately 10% of alpha-TUB constructs. These levels increased between 4.4- and 13.2-fold after cycloheximide was added. Constructs containing half of this region (303-394 or 395-505) produced intermediate levels of beta-GAL mRNA and intermediate levels of cycloheximide induction. The kinetics of cycloheximide induction of beta-GAL mRNA was similar with region 303-505 constructs as with constructs bearing the entire endogenous MSPL intercoding region. Furthermore, region 303-505 increased reporter mRNA abundance after cycloheximide by increasing mRNA half-life. Hence, we have identified a 202-nucleotide region within the MSPL 3'UTR that is in part responsible for cycloheximide induction. We hypothesize that this region may interact with labile regulatory protein factor(s).
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pubmed:grant |
http://linkedlifedata.com/resource/pubmed/grant/AI07343,
http://linkedlifedata.com/resource/pubmed/grant/K08 AI055804-01,
http://linkedlifedata.com/resource/pubmed/grant/R01 AI32135,
http://linkedlifedata.com/resource/pubmed/grant/R01 AI45540,
http://linkedlifedata.com/resource/pubmed/grant/R01 AI48822
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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 |
Jul
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pubmed:issn |
0166-6851
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
142
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
88-97
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pubmed:dateRevised |
2007-11-14
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pubmed:meshHeading |
pubmed-meshheading:15876463-Animals,
pubmed-meshheading:15876463-Gene Expression Regulation,
pubmed-meshheading:15876463-Humans,
pubmed-meshheading:15876463-Leishmania,
pubmed-meshheading:15876463-Metalloendopeptidases,
pubmed-meshheading:15876463-Protozoan Proteins,
pubmed-meshheading:15876463-RNA, Messenger,
pubmed-meshheading:15876463-RNA Stability
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pubmed:year |
2005
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pubmed:articleTitle |
Regulation of genes encoding the major surface protease of Leishmania chagasi via mRNA stability.
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pubmed:affiliation |
Department of Internal Medicine, University of Iowa, Iowa City, IA 52242, USA. jay-purdy@uiowa.edu
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.,
Research Support, U.S. Gov't, Non-P.H.S.,
Research Support, N.I.H., Extramural
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