Abstract:
:Plants with mutations in one of three maize genes, mop1, rmr1, and rmr2, are defective in paramutation, an allele-specific interaction that leads to meiotically heritable chromatin changes. Experiments reported here demonstrate that these genes are required to maintain the transcriptional silencing of two different transgenes, suggesting that paramutation and transcriptional silencing of transgenes share mechanisms. We hypothesize that the transgenes are silenced through an RNA-directed chromatin mechanism, because mop1 encodes an RNA-dependent RNA polymerase. In all the mutants, DNA methylation was reduced in the active transgenes relative to the silent transgenes at all of the CNG sites monitored within the transgene promoter. However, asymmetrical methylation persisted at one site within the reactivated transgene in the rmr1-1 mutant. With that one mutant, rmr1-1, the transgene was efficiently resilenced upon outcrossing to reintroduce the wild-type protein. In contrast, with the mop1-1 and rmr2-1 mutants, the transgene remained active in a subset of progeny even after the wild-type proteins were reintroduced by outcrossing. Interestingly, this immunity to silencing increased as the generations progressed, consistent with a heritable chromatin state being formed at the transgene in plants carrying the mop1-1 and rmr2-1 mutations that becomes more resistant to silencing in subsequent generations.
journal_name
Geneticsjournal_title
Geneticsauthors
McGinnis KM,Springer C,Lin Y,Carey CC,Chandler Vdoi
10.1534/genetics.106.058669subject
Has Abstractpub_date
2006-07-01 00:00:00pages
1637-47issue
3eissn
0016-6731issn
1943-2631pii
genetics.106.058669journal_volume
173pub_type
杂志文章相关文献
GENETICS文献大全abstract::Over one-third of human genome sequence is a product of non-LTR retrotransposition. The retrotransposon that currently drives this process in humans is the highly abundant LINE-1 (L1) element. Despite the ubiquitous nature of L1's in mammals, we still lack a complete mechanistic understanding of the L1 replication cyc...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.108.096636
更新日期:2009-01-01 00:00:00
abstract::Understanding variation in allele frequencies across populations is a central goal of population genetics. Classical models for the distribution of allele frequencies, using forward simulation, coalescent theory, or the diffusion approximation, have been applied extensively for demographic inference, medical study des...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.117.200493
更新日期:2017-07-01 00:00:00
abstract::A family of protein kinases regulates translation in response to different cellular stresses by phosphorylation of the alpha subunit of eukaryotic initiation factor-2 (eIF-2alpha). In yeast, an eIF-2alpha kinase, GCN2, functions in translational control in response to amino acid starvation. It is thought that uncharge...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:2000-02-01 00:00:00
abstract::Filamentous fungi undergo cytokinesis by forming crosswalls termed septa. Here, we describe the genetic and physiological controls governing septation in Aspergillus nidulans. Germinating conidia do not form septa until the completion of their third nuclear division. The first septum is invariantly positioned at the b...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1994-02-01 00:00:00
abstract::A second chromosome line of Drosophila melanogaster (Symbol: T-007) has previously been shown to be responsible for the induction of male recombination. In the present investigation, the genetic elements responsible for this phenomenon have been partially identified and mapped. A major element (Symbol: Mr, for Male re...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1975-10-01 00:00:00
abstract::The genetic effects of one generation of spermatogonial X-irradiation in rats, by a single dose of 600r in one experiment and by a fractionated dose of 450r in another, were measured in three generations of their descendants. Estimates of dominant lethal mutation rates--(2 to 3) X 10-4/gamete/r--from litter size diffe...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1977-02-01 00:00:00
abstract::Microsatellite markers are extensively used to evaluate genetic diversity in natural or experimental evolving populations. Their high degree of polymorphism reflects their high mutation rates. Estimates of the mutation rates are therefore necessary when characterizing diversity in populations. As a complement to the c...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.107.071332
更新日期:2008-08-01 00:00:00
abstract::Forty-one stocks from 30 Drosophila species were surveyed for Wolbachia infection using PCR technology. D. sechellia and two strains of D. auraria were found to be infected and were tested for the expression of cytoplasmic incompatibility, along with D. ananassae and D. melanogaster strains, which are already known to...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1996-11-01 00:00:00
abstract::Mitomycin C (MMC) is a genotoxic agent that induces DNA cross-links, DNA alkylation, and the production of reactive oxygen species (ROS). MMC induces the SOS response and RpoS regulons in Escherichia coli SOS-encoded functions are required for DNA repair, whereas the RpoS regulon is typically induced by metabolic stre...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.116.199471
更新日期:2017-07-01 00:00:00
abstract::Genomic resources for hundreds of species of evolutionary, agricultural, economic, and medical importance are unavailable due to the expense of well-assembled genome sequences and difficulties with multigenerational studies. Teleost fish provide many models for human disease but possess anciently duplicated genomes th...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.111.127324
更新日期:2011-08-01 00:00:00
abstract::Salient features of recombination at ARG4 of Saccharomyces provoke a variation of the double-strand-break repair (DSBR) model that has the following features: (1) Holliday junction cutting is biased in favor of strands upon which DNA synthesis occurred during formation of the joint molecule (this bias ensures that cut...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1999-10-01 00:00:00
abstract::The mutational origin and subsequent evolution of de novo genes, which are hypothesized to be genes of recent origin that are not obviously related to ancestral coding sequence, are poorly understood. However, accumulating evidence suggests that such genes may often function in male reproduction. Here we use testis-de...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.106.069245
更新日期:2007-06-01 00:00:00
abstract::Translocations between the two large autosomes were scored in the progeny of males that had been fed mitomycin-C. The frequencies were the same in spermatogonia sampled after 12 and 25 days and in spermatozoa stored for the same periods in untreated females. ...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1979-10-01 00:00:00
abstract::Two variations of the method of localized mutagenesis were used to introduce mutations into the 72 min region of the Escherichia coli chromosome. Twenty temperature-sensitive mutants, with linkage to markers in this region, have been examined. Each strain showed an inhibition of growth in liquid medium at 44 degrees, ...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1979-02-01 00:00:00
abstract::We studied P element-induced recombination in germline mitotic cells by examining the structure of the recombinant chromosomes. We found that most recombinants retain a mobile P element at the site of the recombination, usually with either a deletion or a duplication immediately adjacent to the P end at which the cros...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1996-12-01 00:00:00
abstract::Genomic integrity is threatened by multiple sources of DNA damage. DNA double-strand breaks (DSBs) are among the most dangerous types of DNA lesions and can be generated by endogenous or exogenous agents, but they can arise also during DNA replication. Sister chromatid recombination (SCR) is a key mechanism for the re...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.109.101899
更新日期:2009-06-01 00:00:00
abstract::Repeated elements are remarkably important for male meiosis and spermiogenesis in Drosophila melanogaster. Pairing of the X and Y chromosomes is mediated by the ribosomal RNA genes of the Y chromosome and X chromosome heterochromatin, spermiogenesis depends on the fertility factors of the Y chromosome. Intriguingly, a...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1994-12-01 00:00:00
abstract::We have examined the number of X-linked loci specifically required only during oogenesis. Complementation analyses among female-sterile (fs) mutations obtained in two mutagenesis screens--GANS' and MOHLER's--indicate that any fs locus represented by two or more mutant alleles in GANS' collection are usually present in...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1986-07-01 00:00:00
abstract::The homeotic genes of the Drosophila bithorax complex are controlled by a large cis-regulatory region that ensures their segmentally restricted pattern of expression. A deletion that removes the Frontabdominal-7 cis-regulatory region (Fab-7') dominantly transforms parasegment 11 into parasegment 12. Previous studies s...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1997-08-01 00:00:00
abstract::To test genetic recombination in the vicinity of insertions of the transposon Tn5, crosses were performed by transduction between M. xanthus strains carrying different insertions of Tn5. One member of each pair carried resistance to kanamycin (Tn5-Km); the other carried resistance to tetracycline (Tn5-Tc). The distanc...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1983-10-01 00:00:00
abstract::R1 and R2 elements are non-LTR retrotransposons that insert specifically into the 28S rRNA genes of arthropods. The process of concerted evolution of the rDNA locus should give rise to rapid turnover of these mobile elements compared to elements that insert at sites throughout a genome. To estimate the rate of R1 and ...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:2002-10-01 00:00:00
abstract::Pigmentation is a rapidly evolving trait that can play important roles in mimicry, sexual selection, thermoregulation, and other adaptive processes in many groups of animals. In Drosophila, pigmentation can differ dramatically among closely related taxa, presenting a good opportunity to dissect the genetic changes und...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.108.091728
更新日期:2008-09-01 00:00:00
abstract::The isolation of mutants of Saccharomyces cerevisiae that divide at approximately half the size of the wild type is described. Three mutants have been isolated in which the small size at bud initiation is due to a mutation in a single nuclear gene. ...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1980-11-01 00:00:00
abstract::The initiation of growth cessation and dormancy represents a critical ecological and evolutionary trade-off between survival and growth in most forest trees. The most important environmental cue regulating the initiation of dormancy is a shortening of the photoperiod and phytochrome genes have been implicated in short...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.105.047522
更新日期:2006-03-01 00:00:00
abstract::There are two common alleles at the Amylase-2 locus in populations of Gammarus palustris, the salt marsh amphipod. Intensive sampling of individuals from two localities at Jamaica Bay revealed a consistent pattern of heterozygote deficiency.-Five possible sources of heterozygote deficiency were examined in this study....
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1985-10-01 00:00:00
abstract::The Mre11/Rad50/Nbs1 (MRN) complex is required for eukaryotic DNA double-strand break (DSB) repair and meiotic recombination. We cloned the Coprinus cinereus rad50 gene and showed that it corresponds to the complementation group previously named rad12, identified mutations in 15 rad50 alleles, and mapped two of the mu...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.108.092775
更新日期:2008-12-01 00:00:00
abstract::We have developed defined genetic lines of the hydroid Hydractinia symbiolongicarpus and confirmed earlier results showing that allorecognition is controlled by a single chromosomal region within these lines. In a large backcross population, we detected recombinants that display a fusibility phenotype distinct from ty...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.167.1.357
更新日期:2004-05-01 00:00:00
abstract::The satellite DNA's from the embryos of five species of Drosophila (D. melanogaster, D. simulans, D. nasuta, D. virilis and D. hydei) have been analyzed for the presence of closed circular duplex DNA molecules, as determined by CsCl-EBr gradients. Circular DNA molecules were found in every species but D. melanogaster....
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1972-11-01 00:00:00
abstract::We have investigated meiotic changes in CAG repeat tracts embedded in a yeast chromosome. Repeat tracts undergo either conversion events between homologs or expansion and contraction events that appear to be confined to a single chromatid. We did not find evidence for conversion of tract interruptions or excess exchan...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:2001-12-01 00:00:00
abstract::MiRNAs bear an increasing number of functions throughout development and in the aging adult. Here we address their role in establishing sexually dimorphic traits and sexual identity in male and female Drosophila. Our survey of miRNA populations in each sex identifies sets of miRNAs differentially expressed in male and...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.114.169268
更新日期:2014-10-01 00:00:00