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01000naa a22002652 4500 |
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NLM165330139 |
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DE-627 |
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20231223104457.0 |
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231223s2006 xx ||||| 00| ||eng c |
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|a pubmed24n0551.xml
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|a (DE-627)NLM165330139
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|a (NLM)16968882
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|a DE-627
|b ger
|c DE-627
|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Mourad, George S
|e verfasserin
|4 aut
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| 245 |
1 |
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|a A fluoroorotic acid-resistant mutant of Arabidopsis defective in the uptake of uracil
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|c 2006
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| 336 |
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|a Text
|b txt
|2 rdacontent
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| 337 |
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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| 338 |
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|a Band
|b nc
|2 rdacarrier
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| 500 |
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|a Date Completed 27.02.2007
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|a Date Revised 21.11.2013
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a A fluoroorotic acid (FOA)-resistant mutant of Arabidopsis thaliana was isolated by screening M2 populations of ethyl methane sulphonate (EMS)-mutagenized Columbia seed. FOA resistance was due to a nuclear recessive gene, for1-1, which locates to a 519 kb region in chromosome 5. Assays of key regulatory enzymes in de novo pyrimidine synthesis (uridine monophosphate synthase) and salvage biochemistry (thymidine kinase) confirmed that FOA resistance in for1-1/for1-1 plants was not due to altered enzymatic activities. Uptake studies using radiolabelled purines, pyrimidines, and [14C]FOA reveal that for1-1/for1-1 plants were specifically defective in the uptake of uracil or uracil-like bases. To confirm such specificity, genetic crosses show that FOR1 is a distinct locus from FUR1 which encodes a deoxyuridine nucleoside transporter. In addition, for1-1/for1-1 plants were restored to FOA sensitivity by transformation with the Escherichia coli uracil transporter gene uraA driven by the cauliflower mosaic virus (CaMV) 35S promoter. Molecular mapping studies reveal that FOR1 does not correspond to loci belonging to any of the six known nucleobase transporter families identified in the Arabidopsis genome. Moreover, FOR1 does not appear to regulate the transcript levels of either uracil transporter-encoding loci At2g03590 or At2g03530. The above results strongly suggest that the for1-1 mutant allele affects a transport mechanism that is specific for the uptake of uracil
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Research Support, U.S. Gov't, Non-P.H.S.
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| 650 |
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7 |
|a Arabidopsis Proteins
|2 NLM
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| 650 |
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7 |
|a Escherichia coli Proteins
|2 NLM
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| 650 |
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|a Membrane Transport Proteins
|2 NLM
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| 650 |
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7 |
|a UraA protein, E coli
|2 NLM
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| 650 |
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7 |
|a Uracil
|2 NLM
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| 650 |
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7 |
|a 56HH86ZVCT
|2 NLM
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| 650 |
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7 |
|a Orotic Acid
|2 NLM
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| 650 |
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7 |
|a 61H4T033E5
|2 NLM
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| 650 |
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|a 5-fluoroorotic acid
|2 NLM
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| 650 |
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7 |
|a 7IA9OUC93E
|2 NLM
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| 700 |
1 |
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|a Snook, Bryan M
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Prabhakar, Joshua T
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Mansfield, Tyler A
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Schultes, Neil P
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 57(2006), 14 vom: 15., Seite 3563-73
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
1 |
8 |
|g volume:57
|g year:2006
|g number:14
|g day:15
|g pages:3563-73
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|a GBV_USEFLAG_A
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|a SYSFLAG_A
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|a GBV_NLM
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|a GBV_ILN_350
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| 951 |
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|a AR
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| 952 |
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|d 57
|j 2006
|e 14
|b 15
|h 3563-73
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