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Titolo:
Paramutation in maize
Autore:
Chandler, VL; Eggleston, WB; Dorweiler, JE;
Indirizzi:
Univ Arizona, Dept Plant Sci, Tucson, AZ 85721 USA Univ Arizona Tucson AZUSA 85721 na, Dept Plant Sci, Tucson, AZ 85721 USA Virginia Commonwealth Univ, Dept Biol, Richmond, VA 23284 USA Virginia Commonwealth Univ Richmond VA USA 23284 , Richmond, VA 23284 USA
Titolo Testata:
PLANT MOLECULAR BIOLOGY
fascicolo: 2-3, volume: 43, anno: 2000,
pagine: 121 - 145
SICI:
0167-4412(200006)43:2-3<121:PIM>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
X-CHROMOSOME INACTIVATION; ANTHOCYANIN REGULATORY GENE; R-STIPPLED MAIZE; DNA-METHYLATION; EPIGENETIC STATES; P-GENE; RECOMBINATION HOTSPOT; CYTOSINE METHYLATION; ALLELIC INTERACTIONS; TRANSGENIC PETUNIA;
Keywords:
anthocyanins; chromatin structure; epigenetics; gene silencing; transcription;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
120
Recensione:
Indirizzi per estratti:
Indirizzo: Chandler, VL Univ Arizona, Dept Plant Sci, Tucson, AZ 85721 USA Univ Arizona Tucson AZ USA 85721 t Sci, Tucson, AZ 85721 USA
Citazione:
V.L. Chandler et al., "Paramutation in maize", PLANT MOL B, 43(2-3), 2000, pp. 121-145

Abstract

Paramutation is a heritable change in gene expression induced by allele interactions. This review summarizes key experiments on three maize loci, which undergo paramutation. Similarities and differences between the phenomenology at the three loci are described. In spite of many differences with respect to the stability of the reduced expression states at each locus or whether paramutation correlates with DNA methylation and repeated sequences within the loci, recent experiments are consistent with a common mechanism underlying paramutation at all three loci. Most strikingly, trans-acting mutants have been isolated that prevent paramutation at all three loci and leadto the activation of silenced Mutator transposable elements. Models consistent with the hypothesis that paramutation involves heritable changes in chromatin structure are presented. Several potential roles for paramutation are discussed. These include localizing recombination to low-copy sequences within the genome, establishing and maintaining chromatin domain boundaries, and providing a mechanism for plants to transmit an environmentally influenced expression state to progeny.

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Documento generato il 05/04/20 alle ore 09:41:21