Abstract:
:The Drosophila melanogaster Gart gene encodes three enzymatic activities in the pathway for purine de novo synthesis. Alternative processing of the primary transcript leads to the synthesis of two overlapping polypeptides. The coding sequence for both polypeptides is interrupted by an intron that contains a functional cuticle protein gene encoded on the opposite DNA strand. Here we show that this nested organization also exists at the homologous locus of a distantly related species, Drosophila pseudoobscura. In both species, the intronic cuticle gene is expressed in wandering larvae and in prepupae. Remarkably, there are 24 different highly conserved noncoding segments within the intron containing the cuticle gene. These are found upstream of the transcriptional start, at the 3' end, and even within the single intronic gene intron. Other introns in the purine gene, including the intron at which alternative processing occurs, show no such homologies. It seems likely that at least some of the conserved noncoding regions are involved in specifying the high level developmental expression of the cuticle gene. We discuss the possibility that shared cis-acting regulatory sites might enhance transcription of both genes and help explain their nested arrangement.
journal_name
Geneticsjournal_title
Geneticsauthors
Henikoff S,Eghtedarzadeh MKsubject
Has Abstractpub_date
1987-12-01 00:00:00pages
711-25issue
4eissn
0016-6731issn
1943-2631journal_volume
117pub_type
杂志文章相关文献
GENETICS文献大全abstract::The large-scale systematic variation in nucleotide composition along mammalian and avian genomes has been a focus of the debate between neutralist and selectionist views of molecular evolution. Here we test whether the compositional variation is due to mutation bias using two new tests, which do not assume composition...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:2002-12-01 00:00:00
abstract::Very few mutations derived from Mutator maize lines have been studied at the molecular level. The variety of Mu elements that can induce mutations, the relative frequency of mutant induction by insertion of a given class of Mu elements or by a Mu-induced genomic rearrangement, a possible intragenic insertion site spec...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1989-06-01 00:00:00
abstract::The RecQ helicase family is critical during DNA damage repair, and mutations in these proteins are associated with Bloom, Werner, or Rothmund-Thompson syndromes in humans, leading to cancer predisposition and/or premature aging. In the budding yeast Saccharomyces cerevisiae, mutations in the RecQ homolog, SGS1, phenoc...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.113.157370
更新日期:2013-12-01 00:00:00
abstract::There has been considerable debate on the geographic origin of the human Y chromosome Alu polymorphism (YAP). Here we report a new, very rare deep-rooting haplogroup within the YAP clade, together with data on other deep-rooting YAP clades. The new haplogroup, found so far in only five Nigerians, is the least-derived ...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:2003-09-01 00:00:00
abstract::The Acp26Aa and Acp26Ab genes that code for male accessory gland proteins are tandemly arranged in the species of the Drosophila melanogaster complex. An approximately 1.6-kb region encompassing both genes has been sequenced in 10, 24, and 18 lines from Spain, Ivory Coast, and Malawi, respectively; the previously stud...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1998-11-01 00:00:00
abstract::Ten mutations are described that transform genotypic hermaphrodites of the nematode Caenorhabditis elegans into phenotypic males. These fall into three autosomal complementation groups, termed tra-1, tra-2, and tra-3. Two alleles of tra-1 produce almost complete transformation, to a fertile male phenotype; such transf...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1977-06-01 00:00:00
abstract::Cell-cell fusion is essential for a variety of developmental steps in many eukaryotic organisms, during both fertilization and vegetative cell growth. Although the molecular mechanisms associated with intracellular membrane fusion are well characterized, the molecular mechanisms of plasma membrane merger between cells...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.108.096149
更新日期:2009-02-01 00:00:00
abstract::Understanding the initiation of meiosis and the relationship of this event with other key cytogenetic processes are major goals in studying the genetic control of meiosis in higher plants. Our genetic and structural analysis of two mutant alleles of the ameiotic1 gene (am1 and am1-praI) suggest that this locus plays a...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1993-12-01 00:00:00
abstract::In this work we study how mutations that change physical properties of cell proteins (stability) affect population survival and growth. We present a model in which the genotype is presented as a set folding free energies of cell proteins. Mutations occur upon replication, so stabilities of some proteins in daughter ce...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.109.106492
更新日期:2009-10-01 00:00:00
abstract::High-throughput sequencing and bioinformatic techniques have enhanced classical genetic analysis and are essential methods for geneticists. Tsukamoto and colleagues use numerous genomic and bioinformatics methods to explore the role of ribonucleoprotein complexes in regulating oocyte meiotic maturation, which is the t...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.118.301139
更新日期:2018-07-01 00:00:00
abstract::The nuclear envelope in Saccharomyces cerevisiae harbors two essential macromolecular protein assemblies: the nuclear pore complexes (NPCs) that enable nucleocytoplasmic transport, and the spindle pole bodies (SPBs) that mediate chromosome segregation. Previously, based on metazoan and budding yeast studies, we report...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.112.141465
更新日期:2012-10-01 00:00:00
abstract::In Drosophila melanogaster, the endogenous retrovirus gypsy is repressed by the functional alleles (restrictive) of an as-yet-uncloned heterochromatic gene called flamenco. Using gypsy-lacZ transcriptional fusions, we show here that this repression takes place not only in the follicle cells of restrictive ovaries, as ...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.166.3.1313
更新日期:2004-03-01 00:00:00
abstract::An AluI family of highly reiterated nontranscribed sequences has been found in the genome of the honeybee Apis mellifera. This repeated sequence is shown to be present at approximately 23,000 copies per haploid genome constituting about 2% of the total genomic DNA. The nucleotide sequence of 10 monomers was determined...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1993-08-01 00:00:00
abstract::A major correlation has been found between the incidence of glucocorticoid-induced cleft palate and the chromosome 8 segment identified by N-acetyl transferase in mice. The resistant strain became fully susceptible while the susceptible strain became resistant when this chromosomal region, representing less than 0.7% ...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1990-09-01 00:00:00
abstract::A maximum-likelihood method to estimate the recombination fraction and its sampling variance using informative and noninformative half-sib offspring is derived. Estimates of the recombination fraction are biased up to 20 cM when noninformative offspring are discarded. In certain scenarios, the sampling variance can be...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:2001-03-01 00:00:00
abstract::Ras1 GTPase is the Schizosaccharomyces pombe homolog of the mammalian Ha-Ras proto-oncoprotein. Ras1 interacts with Scd1 (aka Ral1), a presumptive guanine nucleotide exchange factor for Cdc42sp, to control organization of the cytoskeleton. In this study, we demonstrated that the scd1 deletion (scd1Delta) induced hyper...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:2000-11-01 00:00:00
abstract::Many heterogametic organisms adjust sex chromosome expression to accommodate differences in gene dosage. This requires selective recruitment of regulatory factors to the modulated chromosome. How these factors are localized to a chromosome with requisite accuracy is poorly understood. Drosophila melanogaster males inc...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.118.301173
更新日期:2018-08-01 00:00:00
abstract::An SSR-based linkage map was constructed in Brassica rapa. It includes 113 SSR, 87 RFLP, and 62 RAPD markers. It consists of 10 linkage groups with a total distance of 1005.5 cM and an average distance of 3.7 cM. SSRs are distributed throughout the linkage groups at an average of 8.7 cM. Synteny between B. rapa and a ...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.104.038968
更新日期:2006-05-01 00:00:00
abstract::We tested the hypothesis that the time course of the evolution of antifungal drug resistance depends on the ploidy of the fungus. The experiments were designed to measure the initial response to the selection imposed by the antifungal drug fluconazole up to and including the fixation of the first resistance mutation i...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.104.033266
更新日期:2004-12-01 00:00:00
abstract::Sister-chromatid exchanges (SCE) were studied in allium cepa L. meristematic cells at the second and third divisions after BrdUrd-substitution during just the first or during the second and third cycles, respectively. The observed SCE nonreciprocal/reciprocal ratios detected at the third division in both experiments, ...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1979-08-01 00:00:00
abstract::Two Podospora mutants carrying mutations modE and modF were persumed to be quiescent defective, because, when grown under glucose limitation, they differed from the wild-type strain in an excess of dry weight production and a reduction of cell survival. New insight on the action of modE and modF mutations was provided...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1985-01-01 00:00:00
abstract::In(2LR)PL is a large pericentric inversion polymorphic in populations of Drosophila melanogaster on two Indian Ocean islands. This polymorphism is puzzling: because crossing over in female heterokaryotypes produces inviable zygotes, such inversions are thought to be underdominant and should be quickly eliminated from ...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1991-11-01 00:00:00
abstract::As the dynamic nature of progenitor genomes accompanies the speciation by interspecific hybridization, the extraction of the constituent subgenome(s) from a natural allopolyploid species of long history and then restitution of the progenitor(s) provides the unique opportunity to study the genome evolution and interpla...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.116.190967
更新日期:2016-11-01 00:00:00
abstract::We have genetically analyzed, cloned and physically mapped the modified cytosine-specific restriction determinants mcrA (rglA) and mcrB (rglB) of Escherichia coli K-12. The independently discovered Rgl and Mcr restriction systems are shown to be identical by three criteria: 1) mutants with the RglA- or RglB- phenotype...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1989-06-01 00:00:00
abstract::Natural populations of Daphnia magna have been found which are polymorphic for electrophoretic variants of supernatant malic dehydrogenase, esterase, and alkaline phosphatase. Using these enzyme variants as genetic markers it has been possible to demonstrate the absence of recombination during parthenogenetic reproduc...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1972-08-01 00:00:00
abstract::We examine the influence of nonrandom mating and immigration on the evolutionary dynamics of cytonuclear associations in hybrid zones. Recursion equations for allelic and genotypic cytonuclear disequilibria were generated under models of (1) migration alone, assuming hybrid zone matings are random with respect to cyto...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1989-08-01 00:00:00
abstract::Heterologous yeast artificial chromosomes (YACs) do not recombine with each other and missegregate in 25% of meiosis I events. Recombination hot spots in the yeast Saccharomyces cerevisiae have previously been shown to be associated with sites of meiosis-induced double-strand breaks (DSBs). A 6-kb fragment containing ...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1994-12-01 00:00:00
abstract::We have identified a new locus involved in gibberellin (GA) signal transduction by screening for suppressors of the Arabidopsis thaliana GA biosynthetic mutant gal-3. The locus is named RGA for repressor of gal-3. Based on the recessive phenotype of the digenic rga/gal-3 mutant, the wild-type gene product of RGA is pr...
journal_title:Genetics
pub_type: 杂志文章
doi:
更新日期:1997-07-01 00:00:00
abstract::In most eukaryotes, crossovers are not independently distributed along the length of a chromosome. Instead, they appear to avoid close proximity to one another--a phenomenon known as crossover interference. Previously, for three of the five Arabidopsis chromosomes, we measured the strength of interference and suggeste...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.104.040055
更新日期:2005-06-01 00:00:00
abstract::Previous work showed that C. elegans gon-14 is required for gonadogenesis. Here we report that gon-14 encodes a protein with similarity to LIN-15B, a class B synMuv protein. An extensive region of GON-14 contains blocks of sequence similarity to transposases of the hAT superfamily, but key residues are not conserved, ...
journal_title:Genetics
pub_type: 杂志文章
doi:10.1534/genetics.105.048751
更新日期:2006-02-01 00:00:00