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1.
Elife ; 102021 02 22.
Artigo em Inglês | MEDLINE | ID: mdl-33616528

RESUMO

Drosophila reproductive behaviors are directed by fruitless neurons. A reanalysis of genomic studies shows that genes encoding dpr and DIP immunoglobulin superfamily (IgSF) members are expressed in fru P1 neurons. We find that each fru P1 and dpr/DIP (fru P1 ∩ dpr/DIP) overlapping expression pattern is similar in both sexes, but there are dimorphisms in neuronal morphology and cell number. Behavioral studies of fru P1 ∩ dpr/DIP perturbation genotypes indicate that the mushroom body functions together with the lateral protocerebral complex to direct courtship behavior. A single-cell RNA-seq analysis of fru P1 neurons shows that many DIPs have high expression in a small set of neurons, whereas the dprs are often expressed in a larger set of neurons at intermediate levels, with a myriad of dpr/DIP expression combinations. Functionally, we find that perturbations of sex hierarchy genes and of DIP-ε change the sex-specific morphologies of fru P1 ∩ DIP-α neurons.


Assuntos
Moléculas de Adesão Celular/metabolismo , Proteínas de Drosophila/metabolismo , Drosophila melanogaster/metabolismo , Proteínas do Tecido Nervoso/metabolismo , Fatores de Transcrição/metabolismo , Animais , Moléculas de Adesão Celular/genética , Proteínas de Drosophila/genética , Drosophila melanogaster/genética , Drosophila melanogaster/fisiologia , Feminino , Masculino , Proteínas do Tecido Nervoso/genética , Neurônios/citologia , Neurônios/metabolismo , Análise de Sequência de RNA , Caracteres Sexuais , Comportamento Sexual Animal , Fatores de Transcrição/genética
2.
G3 (Bethesda) ; 10(3): 967-983, 2020 03 05.
Artigo em Inglês | MEDLINE | ID: mdl-31907222

RESUMO

Examining cross-tissue interactions is important for understanding physiology and homeostasis. In animals, the female gonad produces signaling molecules that act distally. We examine gene expression in Drosophila melanogaster female head tissues in 1) virgins without a germline compared to virgins with a germline, 2) post-mated females with and without a germline compared to virgins, and 3) post-mated females mated to males with and without a germline compared to virgins. In virgins, the absence of a female germline results in expression changes in genes with known roles in nutrient homeostasis. At one- and three-day(s) post-mating, genes that change expression are enriched with those that function in metabolic pathways, in all conditions. We systematically examine female post-mating impacts on sleep, food preference and re-mating, in the strains and time points used for gene expression analyses and compare to published studies. We show that post-mating, gene expression changes vary by strain, prompting us to examine variation in female re-mating. We perform a genome-wide association study that identifies several DNA polymorphisms, including four in/near Wnt signaling pathway genes. Together, these data reveal how gene expression and behavior in females are influenced by cross-tissue interactions, by examining the impact of mating, fertility, and genotype.


Assuntos
Drosophila melanogaster/genética , Fertilidade/genética , Reprodução/genética , Comportamento Sexual Animal , Via de Sinalização Wnt/genética , Animais , Drosophila melanogaster/fisiologia , Feminino , Expressão Gênica , Genes de Insetos , Estudo de Associação Genômica Ampla , Genótipo , Mutação INDEL , Masculino , Polimorfismo Genético
3.
G3 (Bethesda) ; 6(8): 2455-65, 2016 08 09.
Artigo em Inglês | MEDLINE | ID: mdl-27247289

RESUMO

Male and female reproductive behaviors in Drosophila melanogaster are vastly different, but neurons that express sex-specifically spliced fruitless transcripts (fru P1) underlie these behaviors in both sexes. How this set of neurons can generate such different behaviors between the two sexes is an unresolved question. A particular challenge is that fru P1-expressing neurons comprise only 2-5% of the adult nervous system, and so studies of adult head tissue or whole brain may not reveal crucial differences. Translating Ribosome Affinity Purification (TRAP) identifies the actively translated pool of mRNAs from fru P1-expressing neurons, allowing a sensitive, cell-type-specific assay. We find four times more male-biased than female-biased genes in TRAP mRNAs from fru P1-expressing neurons. This suggests a potential mechanism to generate dimorphism in behavior. The male-biased genes may direct male behaviors by establishing cell fate in a similar context of gene expression observed in females. These results suggest a possible global mechanism for how distinct behaviors can arise from a shared set of neurons.


Assuntos
Proteínas de Drosophila/genética , Drosophila melanogaster/genética , Proteínas do Tecido Nervoso/genética , Reprodução/genética , Comportamento Sexual Animal , Fatores de Transcrição/genética , Animais , Drosophila melanogaster/crescimento & desenvolvimento , Feminino , Regulação da Expressão Gênica no Desenvolvimento , Masculino , Neurônios/metabolismo , Caracteres Sexuais
4.
Dev Cell ; 37(6): 486-8, 2016 06 20.
Artigo em Inglês | MEDLINE | ID: mdl-27326925

RESUMO

During courtship, Drosophila melanogaster males sing to females a song composed of rhythmic pulses and sine song. In this issue of Developmental Cell, Shirangi et al. (2016) show that a cluster of doublesex-expressing neurons directs the production of the sine song component through functional linkages to wing motoneurons.


Assuntos
Corte , Proteínas de Ligação a DNA/metabolismo , Proteínas de Drosophila/metabolismo , Drosophila melanogaster/fisiologia , Vocalização Animal/fisiologia , Animais , Feminino , Masculino , Modelos Biológicos , Neurônios/metabolismo
5.
Plant Cell ; 26(1): 246-62, 2014 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-24464295

RESUMO

The formation of leaves and other lateral organs in plants depends on the proper specification of adaxial-abaxial (upper-lower) polarity. KANADI1 (KAN1), a member of the GARP family of transcription factors, is a key regulator of abaxial identity, leaf growth, and meristem formation in Arabidopsis thaliana. Here, we demonstrate that the Myb-like domain in KAN1 binds the 6-bp motif GNATA(A/T) and that this motif alone is sufficient to squelch transcription of a linked reporter in vivo. In addition, we report that KAN1 acts as a transcriptional repressor. Among its targets are genes involved in auxin biosynthesis, auxin transport, and auxin response. Furthermore, we find that the adaxializing HD-ZIPIII transcription factor REVOLUTA has opposing effects on multiple components of the auxin pathway. We hypothesize that HD-ZIPIII and KANADI transcription factors pattern auxin accumulation and responsiveness in the embryo. Specifically, we propose the opposing actions of KANADI and HD-ZIPIII factors on cotyledon formation (KANADI represses and HD-ZIPIII promotes cotyledon formation) occur through their opposing actions on genes acting at multiple steps in the auxin pathway.


Assuntos
Proteínas de Arabidopsis/fisiologia , Arabidopsis/metabolismo , Proteínas de Homeodomínio/fisiologia , Ácidos Indolacéticos/metabolismo , Proteínas Repressoras/fisiologia , Proteínas de Arabidopsis/metabolismo , Transporte Biológico , Regulação da Expressão Gênica de Plantas , Redes Reguladoras de Genes , Proteínas de Homeodomínio/metabolismo , Proteínas Repressoras/genética , Proteínas Repressoras/metabolismo , Transdução de Sinais/genética , Fatores de Transcrição
6.
Plant Cell ; 25(9): 3228-49, 2013 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-24076978

RESUMO

The broadly conserved Class III homeodomain leucine zipper (HD-ZIPIII) and KANADI transcription factors have opposing and transformational effects on polarity and growth in all tissues and stages of the plant's life. To obtain a comprehensive understanding of how these factors work, we have identified transcripts that change in response to induced HD-ZIPIII or KANADI function. Additional criteria used to identify high-confidence targets among this set were presence of an adjacent HD-ZIPIII binding site, expression enriched within a subdomain of the shoot apical meristem, mutant phenotype showing defect in polar leaf and/or meristem development, physical interaction between target gene product and HD-ZIPIII protein, opposite regulation by HD-ZIPIII and KANADI, and evolutionary conservation of the regulator-target relationship. We find that HD-ZIPIII and KANADI regulate tissue-specific transcription factors involved in subsidiary developmental decisions, nearly all major hormone pathways, and new actors (such as indeterminate domain4) in the ad/abaxial regulatory network. Multiple feedback loops regulating HD-ZIPIII and KANADI are identified, as are mechanisms through which HD-ZIPIII and KANADI oppose each other. This work lays the foundation needed to understand the components, structure, and workings of the ad/abaxial regulatory network directing basic plant growth and development.


Assuntos
Proteínas de Arabidopsis/genética , Arabidopsis/genética , Regulação da Expressão Gênica de Plantas , Redes Reguladoras de Genes/genética , Proteínas de Homeodomínio/genética , Fatores de Transcrição/genética , Arabidopsis/anatomia & histologia , Arabidopsis/crescimento & desenvolvimento , Arabidopsis/metabolismo , Proteínas de Arabidopsis/metabolismo , Sítios de Ligação , Padronização Corporal , Regulação para Baixo , Expressão Gênica , Perfilação da Expressão Gênica , Proteínas de Homeodomínio/metabolismo , Meristema/anatomia & histologia , Meristema/genética , Meristema/crescimento & desenvolvimento , Meristema/metabolismo , Modelos Biológicos , Mutação , Análise de Sequência com Séries de Oligonucleotídeos , Fenótipo , Filogenia , Folhas de Planta/anatomia & histologia , Folhas de Planta/genética , Folhas de Planta/crescimento & desenvolvimento , Folhas de Planta/metabolismo , Brotos de Planta/anatomia & histologia , Brotos de Planta/genética , Brotos de Planta/crescimento & desenvolvimento , Brotos de Planta/metabolismo , Plantas Geneticamente Modificadas , Fatores de Transcrição/metabolismo , Regulação para Cima
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