Effect of DNA sequence divergence on homologous recombination as analyzed by a random-walk model.

abstract：:Promoter proximal pausing (PPP) of RNA polymerase II has emerged as a crucial rate-limiting step in the regulation of gene expression. Regulation of PPP is brought about by complexes 7SK snRNP, P-TEFb (Cdk9/cycT), and the negative elongation factor (NELF), which are highly conserved from Drosophila to humans. Here, we...

journal_title：Genetics

authors： Nagarkar S,Wasnik R,Govada P,Cohen S,Shashidhara LS

更新日期：2020-09-01 00:00:00

abstract：:We develop a maximum penalized-likelihood (MPL) method to estimate the fitnesses of amino acids and the distribution of selection coefficients (S = 2Ns) in protein-coding genes from phylogenetic data. This improves on a previous maximum-likelihood method. Various penalty functions are used to penalize extreme estimate...

journal_title：Genetics

authors： Tamuri AU,Goldman N,dos Reis M

更新日期：2014-05-01 00:00:00

abstract：:The shibire locus of Drosophila melanogaster encodes dynamin, a GTPase required for the fission of endocytic vesicles from plasma membrane. Biochemical studies indicate that mammalian dynamin is part of a complex containing multiple dynamin subunits and other polypeptides. To gain insight into sequences of dynamin cri...

journal_title：Genetics

authors： Grant D,Unadkat S,Katzen A,Krishnan KS,Ramaswami M

更新日期：1998-06-01 00:00:00

abstract：:The parentals of the interspecific cross Cucurbita maxima xC. ecuadorensis had different isozyme phenotypes for 12 enzyme systems. Characterization of the systems demonstrated that the expression and intracellular distribution of the isozymes were similar to those in other plant taxa; however, a considerable number of...

journal_title：Genetics

authors： Weeden NF,Robinson RW

更新日期：1986-10-01 00:00:00

abstract：:Much of the material taken into cells by endocytosis is rapidly returned to the plasma membrane by the endocytic recycling pathway. Although recycling is vital for the correct localization of cell membrane receptors and lipids, the molecular mechanisms that regulate recycling are only partially understood. Here we sho...

journal_title：Genetics

authors： Nilsson L,Conradt B,Ruaud AF,Chen CC,Hatzold J,Bessereau JL,Grant BD,Tuck S

更新日期：2008-05-01 00:00:00

abstract：:To investigate the regulation of Drosophila melanogaster behavior by biogenic amines, we have exploited the broad requirement of the vesicular monoamine transporter (VMAT) for the vesicular storage and exocytotic release of all monoamine neurotransmitters. We used the Drosophila VMAT (dVMAT) null mutant to globally ab...

journal_title：Genetics

authors： Chen A,Ng F,Lebestky T,Grygoruk A,Djapri C,Lawal HO,Zaveri HA,Mehanzel F,Najibi R,Seidman G,Murphy NP,Kelly RL,Ackerson LC,Maidment NT,Jackson FR,Krantz DE

更新日期：2013-01-01 00:00:00

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

authors： Dong C,Poulter RT,Han JS

更新日期：2009-01-01 00:00:00

abstract：:Considering a random mating population of finite size, the variance of the number of loci having a given gene frequency was derived under the assumption of a steady flux of mutations. The variance of average heterozygosity among populations was also derived under the same assumption. It was shown that these variances ...

journal_title：Genetics

authors： Maruyama T

更新日期：1973-02-01 00:00:00

abstract：:We have examined the effects of prolonged histidine deprivation on the reversion of Salmonella typhimurium histidine auxotrophs containing either hisG46, a missense mutation (CTC----CCC), or hisG428, an ochre mutation (CAA----TAA). Both of these mutants can revert to His+ via intragenic and extragenic mechanisms. Wher...

journal_title：Genetics

authors： Prival MJ,Cebula TA

更新日期：1992-10-01 00:00:00

abstract：:The correct wiring of neuronal circuits depends on outgrowth and guidance of neuronal processes during development. In the past two decades, great progress has been made in understanding the molecular basis of axon outgrowth and guidance. Genetic analysis in Caenorhabditis elegans has played a key role in elucidating ...

journal_title：Genetics

authors： Chisholm AD,Hutter H,Jin Y,Wadsworth WG

更新日期：2016-11-01 00:00:00

abstract：:Using zinc-finger nucleases (ZFNs) to cleave the chromosomal target, we have achieved high frequencies of gene targeting in the Drosophila germline. Both local mutagenesis through nonhomologous end joining (NHEJ) and gene replacement via homologous recombination (HR) are stimulated by target cleavage. In this study we...

journal_title：Genetics

authors： Bozas A,Beumer KJ,Trautman JK,Carroll D

更新日期：2009-07-01 00:00:00

abstract：:Mutations identified in zebrafish genetic screens allow the dissection of a wide array of problems in vertebrate biology. Most screens have examined mutations induced by treatment of spermatogonial (premeiotic) cells with the chemical mutagen N-ethyl-N-nitrosourea (ENU). Treatment of postmeiotic gametes with ENU induc...

journal_title：Genetics

authors： Imai Y,Feldman B,Schier AF,Talbot WS

更新日期：2000-05-01 00:00:00

abstract：:Initial events in double-strand break repair by homologous recombination in vivo involve homology searching, 3' strand invasion, and new DNA synthesis. While studies in yeast have contributed much to our knowledge of these processes, in comparison, little is known of the early events in the integrated mammalian system...

journal_title：Genetics

authors： Si W,Mundia MM,Magwood AC,Mark AL,McCulloch RD,Baker MD

更新日期：2010-06-01 00:00:00

abstract：:We analyze two models of the maintenance of quantitative genetic variance in a mixed-mating system of self-fertilization and outcrossing. In both models purely additive genetic variance is maintained by mutation and recombination under stabilizing selection on the phenotype of one or more quantitative characters. The ...

journal_title：Genetics

authors： Lande R,Porcher E

更新日期：2015-07-01 00:00:00

abstract：:Resolving the mechanistic and genetic bases of reproductive barriers between species is essential to understanding the evolutionary forces that shape speciation. Intrinsic hybrid incompatibilities are often treated as fixed between species, yet there can be considerable variation in the strength of reproductive isolat...

journal_title：Genetics

authors： Larson EL,Vanderpool D,Sarver BAJ,Callahan C,Keeble S,Provencio LL,Kessler MD,Stewart V,Nordquist E,Dean MD,Good JM

更新日期：2018-07-01 00:00:00

abstract：:We define a new gene, SRD1, involved in the processing of pre-rRNA to mature rRNA. The SRD1 gene was identified by selecting for second-site suppressors of the previously described rrp1-1 mutation. The rrp1-1 mutation causes temperature-sensitive growth, a conditional defect in processing of 27S pre-rRNA to mature 25S...

journal_title：Genetics

authors： Fabian GR,Hess SM,Hopper AK

更新日期：1990-03-01 00:00:00

abstract：:Many of the transcription factors and target genes that pattern the developing adult remain unknown. In the present study, we find that an ortholog of the poorly understood transcription factor, glucose transporter (GLUT4) enhancer factor (Glut4EF, GEF) [also known as the Huntington's disease gene regulatory region-bi...

journal_title：Genetics

authors： Yazdani U,Huang Z,Terman JR

更新日期：2008-02-01 00:00:00

abstract：:The Saccharomyces cerevisiae mitochondrial endonuclease I-SceI creates a double-strand break as the initiating step in the gene conversional transfer of the omega+ intron to omega- DNA. We have expressed a galactose-inducible synthetic I-SceI gene in the nucleus of yeast that also carries the I-SceI recognition site o...

journal_title：Genetics

authors： Plessis A,Perrin A,Haber JE,Dujon B

更新日期：1992-03-01 00:00:00

abstract：:We subjected the genes encoding the 19.3-, 21.3c-, and 51-kDa iron-sulfur subunits of respiratory chain complex I from Neurospora crassa to site-directed mutagenesis to mimic mutations in human complex I subunits associated with mitochondrial diseases. The V135M substitution was introduced into the 19.3-kDa cDNA, the ...

journal_title：Genetics

authors： Duarte M,Schulte U,Ushakova AV,Videira A

更新日期：2005-09-01 00:00:00

abstract：:Two protocols are presented that allow the selection of mutations mapping to micronuclear chromosome 5 in Tetrahymena thermophilia. One protocol involves crossing mutagenized diploid cells directly to a strain nullisomic for chromosome 5 and screening the monosomic progeny for a mutant phenotype. The second protocol f...

journal_title：Genetics

authors： Altschuler MI,Bruns PJ

更新日期：1984-03-01 00:00:00

abstract：:Adaptation in diploids is predicted to proceed via mutations that are at least partially dominant in fitness. Recently, we argued that many adaptive mutations might also be commonly overdominant in fitness. Natural (directional) selection acting on overdominant mutations should drive them into the population but then,...

journal_title：Genetics

authors： Sellis D,Kvitek DJ,Dunn B,Sherlock G,Petrov DA

更新日期：2016-07-01 00:00:00

abstract：:Sxl appears to head a regulatory gene hierarchy that controls Drosophila sexual dimorphism in response to the X chromosome/autosome balance. Only XXAA cells normally have Sxl(+) activity. It maintains both the female morphogenetic sequence and a level of X-linked dosage-compensated gene expression compatible with dipl...

journal_title：Genetics

authors： Cline TW

更新日期：1984-06-01 00:00:00

abstract：:Two large experiments were conducted in order to evaluate the heterozygous effects of irradiated chromosomes on viability. Mutations were accumulated on several hundred second chromosomes by delivering doses of 2,500r over either two or four generations for total X-ray exposures of 5,000r or 10,000r. Chromosomes treat...

journal_title：Genetics

authors： Simmons MJ

更新日期：1976-10-01 00:00:00

abstract：:The neurogenic loci comprise a small group of genes which are required for proper division between the neural and epidermal pathways of differentiation within the neuroectoderm. Loss of neurogenic gene function results in the misrouting of prospective epidermal cells into neuroblasts. A molecular analysis of the neuro...

journal_title：Genetics

authors： Yedvobnick B,Smoller D,Young P,Mills D

更新日期：1988-03-01 00:00:00

abstract：:The genetic basis underlying inbreeding depression and heterosis for three grain yield components of rice was investigated in five interrelated mapping populations using a complete RFLP linkage map, replicated phenotyping, and the mixed model approach. The populations included 254 F(10) recombinant inbred lines (RILs)...

journal_title：Genetics

authors： Luo LJ,Li ZK,Mei HW,Shu QY,Tabien R,Zhong DB,Ying CS,Stansel JW,Khush GS,Paterson AH

更新日期：2001-08-01 00:00:00

abstract：:Directional export of messenger RNA (mRNA) protein particles (mRNPs) through nuclear pore complexes (NPCs) requires multiple factors. In Saccharomyces cerevisiae, the NPC proteins Nup159 and Nup42 are asymmetrically localized to the cytoplasmic face and have distinct functional domains: a phenylalanine-glycine (FG) re...

journal_title：Genetics

authors： Adams RL,Terry LJ,Wente SR

更新日期：2014-08-01 00:00:00

abstract：:Likelihood-based parentage inference depends on the distribution of a likelihood-ratio statistic, which, in most cases of interest, cannot be exactly determined, but only approximated by Monte Carlo simulation. We provide importance-sampling algorithms for efficiently approximating very small tail probabilities in the...

journal_title：Genetics

authors： Anderson EC,Garza JC

更新日期：2006-04-01 00:00:00

abstract：:Fruit flies of the genus Drosophila have been an attractive and effective genetic model organism since Thomas Hunt Morgan and colleagues made seminal discoveries with them a century ago. Work with Drosophila has enabled dramatic advances in cell and developmental biology, neurobiology and behavior, molecular biology, ...

journal_title：Genetics

authors： Hales KG,Korey CA,Larracuente AM,Roberts DM

更新日期：2015-11-01 00:00:00

abstract：:Establishing durable disease resistance in agricultural crops, where much of the plant defense is provided through effector-R gene interactions, is complicated by the ability of pathogens to overcome R gene resistance by losing the corresponding effector gene. Many proposed methods to maintain disease resistance in th...

journal_title：Genetics

authors： Wichmann G,Bergelson J

更新日期：2004-02-01 00:00:00

abstract：:The double-strand break repair models for homologous recombination propose that a double-strand break in a duplex DNA segment is repaired by gene conversion copying a homologous DNA segment. This is a type of conservative recombination, or two-progeny recombination, which generates two duplex DNA segments from two dup...

journal_title：Genetics

authors： Yokochi T,Kusano K,Kobayashi I

更新日期：1995-01-01 00:00:00