Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
1998-6-1
pubmed:abstractText
Homologous recombination between dispersed DNA repeats creates chromosomal rearrangements that are deleterious to the genome. The methylation associated with DNA repeats in many eukaryotes might serve to inhibit homologous recombination and play a role in preserving genome integrity. We have tested the hypothesis that DNA methylation suppresses meiotic recombination in the fungus Ascobolus immersus. The natural process of methylation-induced premeiotically (MIP) was used to methylate the b2 spore color gene, a 7.5-kb chromosomal recombination hot spot. The frequency of crossing-over between two markers flanking b2 was reduced several hundredfold when b2 was methylated on the two homologs. This demonstrates that DNA methylation strongly inhibits homologous recombination. When b2 was methylated on one homolog only, crossing-over was still reduced 50-fold, indicating that the effect of methylation cannot be limited to the blocking of initiation of recombination on the methylated homolog. On the basis of these and other observations, we propose that DNA methylation perturbs pairing between the two intact homologs before recombination initiation and/or impairs the normal processing of recombination intermediates.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-1330826, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-1360933, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-1371250, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-1425580, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-1525825, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-1560750, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-1568254, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-1581960, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-1630452, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-1783293, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-1986228, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-1986861, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-2004421, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-2167441, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-2537472, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-2555716, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-2677675, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-2822256, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-3007275, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-3549449, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-6380756, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-7559561, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-7588640, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-7881405, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-7958822, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-8020104, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-8143804, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-8187170, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-8321201, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-8341678, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-8365347, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-8469984, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-8521495, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-8542279, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-8601475, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-8630488, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-8808621, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-8811089, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-8825482, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-895854, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-9140403, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-9260521, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-9323140, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-9330620, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-9391101, http://linkedlifedata.com/resource/pubmed/commentcorrection/9573054-9395433
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0890-9369
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
12
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1381-9
pubmed:dateRevised
2009-11-18
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Suppression of crossing-over by DNA methylation in Ascobolus.
pubmed:affiliation
Institut de Génétique et Microbiologie, Université Paris-Sud, 91405 Orsay Cedex, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't