Development Genes and Evolution最新文献

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Amphioxus SYCP1: a case of retrogene replacement and co-option of regulatory elements adjacent to the ParaHox cluster. 文文鱼SYCP1:一个与ParaHox集群相邻的调控元件的逆转录替代和共选择的案例。
IF 2.4 3区 生物学
Development Genes and Evolution Pub Date : 2018-01-01 Epub Date: 2018-01-02 DOI: 10.1007/s00427-017-0600-9
Myles G Garstang, David E K Ferrier
{"title":"Amphioxus SYCP1: a case of retrogene replacement and co-option of regulatory elements adjacent to the ParaHox cluster.","authors":"Myles G Garstang,&nbsp;David E K Ferrier","doi":"10.1007/s00427-017-0600-9","DOIUrl":"https://doi.org/10.1007/s00427-017-0600-9","url":null,"abstract":"<p><p>Retrogenes are formed when an mRNA is reverse-transcribed and reinserted into the genome in a location unrelated to the original locus. If this retrocopy inserts into a transcriptionally favourable locus and is able to carry out its original function, it can, in rare cases, lead to retrogene replacement. This involves the original, often multi-exonic, parental copy being lost whilst the newer single-exon retrogene copy 'replaces' the role of the ancestral parent gene. One example of this is amphioxus SYCP1, a gene that encodes a protein used in synaptonemal complex formation during meiosis and which offers the opportunity to examine how a retrogene evolves after the retrogene replacement event. SYCP1 genes exist as large multi-exonic genes in most animals. AmphiSYCP1, however, contains a single coding exon of ~ 3200 bp and has inserted next to the ParaHox cluster of amphioxus, whilst the multi-exonic ancestral parental copy has been lost. Here, we show that AmphiSYCP1 has not only replaced its parental copy, but also has evolved additional regulatory function by co-opting a bidirectional promoter from the nearby AmphiCHIC gene. AmphiSYCP1 has also evolved a de novo, multi-exonic 5'untranslated region that displays distinct regulatory states, in the form of two different isoforms, and has evolved novel expression patterns during amphioxus embryogenesis in addition to its ancestral role in meiosis. The absence of ParaHox-like expression of AmphiSYCP1, despite its proximity to the ParaHox cluster, also suggests that this gene is not influenced by any potential pan-cluster regulatory mechanisms, which are seemingly restricted to only the ParaHox genes themselves.</p>","PeriodicalId":50588,"journal":{"name":"Development Genes and Evolution","volume":"228 1","pages":"13-30"},"PeriodicalIF":2.4,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s00427-017-0600-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35705356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Two Drosophilids exhibit distinct EGF pathway patterns in oogenesis. 两种果蝇在卵子发生过程中表现出不同的 EGF 通路模式。
IF 0.8 3区 生物学
Development Genes and Evolution Pub Date : 2018-01-01 Epub Date: 2017-12-20 DOI: 10.1007/s00427-017-0601-8
Kenley N O'Hanlon, Rachel A Dam, Sophie L Archambeault, Celeste A Berg
{"title":"Two Drosophilids exhibit distinct EGF pathway patterns in oogenesis.","authors":"Kenley N O'Hanlon, Rachel A Dam, Sophie L Archambeault, Celeste A Berg","doi":"10.1007/s00427-017-0601-8","DOIUrl":"10.1007/s00427-017-0601-8","url":null,"abstract":"<p><p>Deciphering the evolution of morphological structures is a remaining challenge in the field of developmental biology. The respiratory structures of insect eggshells, called the dorsal appendages, provide an outstanding system for exploring these processes since considerable information is known about their patterning and morphogenesis in Drosophila melanogaster and dorsal appendage number and morphology vary widely across Drosophilid species. We investigated the patterning differences that might facilitate morphogenetic differences between D. melanogaster, which produces two oar-like structures first by wrapping and then elongating the tubes via cell intercalation and cell crawling, and Scaptodrosophila lebanonensis, which produces a variable number of appendages simply by cell intercalation and crawling. Analyses of BMP pathway components thickveins and P-Mad demonstrate that anterior patterning is conserved between these species. In contrast, EGF signaling exhibits significant differences. Transcripts for the ligand encoded by gurken localize similarly in the two species, but this morphogen creates a single dorsolateral primordium in S. lebanonensis as defined by activated MAP kinase and the downstream marker broad. Expression patterns of pointed, argos, and Capicua, early steps in the EGF pathway, exhibit a heterochronic shift in S. lebanonensis relative to those seen in D. melanogaster. We demonstrate that the S. lebanonensis Gurken homolog is active in D. melanogaster but is insufficient to alter downstream patterning responses, indicating that Gurken-EGF receptor interactions do not distinguish the two species' patterning. Altogether, these results differentiate EGF signaling patterns between species and shed light on how changes to the regulation of patterning genes may contribute to different tube-forming mechanisms.</p>","PeriodicalId":50588,"journal":{"name":"Development Genes and Evolution","volume":"228 1","pages":"31-48"},"PeriodicalIF":0.8,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5805658/pdf/nihms929699.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35676743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The ontogeny of the 300 million year old xiphosuran Euproops danae (Euchelicerata) and implications for resolving the Euproops species complex. 3亿年前剑龙Euproops danae (Euchelicerata)的个体发育及其对解决Euproops物种复合体的意义。
IF 0.8 3区 生物学
Development Genes and Evolution Pub Date : 2018-01-01 Epub Date: 2018-01-23 DOI: 10.1007/s00427-018-0604-0
Carolin Haug, Marie A I N Rötzer
{"title":"The ontogeny of the 300 million year old xiphosuran Euproops danae (Euchelicerata) and implications for resolving the Euproops species complex.","authors":"Carolin Haug, Marie A I N Rötzer","doi":"10.1007/s00427-018-0604-0","DOIUrl":"10.1007/s00427-018-0604-0","url":null,"abstract":"<p><p>Xiphosurans have often been considered as archaic appearing cheliceratan arthropods, with a rich fossil record. We describe here parts of the post-embryonic ontogeny of the 300 million year old xiphosuran Euproops danae (Xiphosura sensu stricto, Euchelicerata), from the Mazon Creek Lagerstätte (Upper Carboniferous), USA. Recently, the ontogeny of a closely related species, Euproops sp. from the Upper Carboniferous Piesberg quarry, Osnabrück, Germany (informally called 'Piesproops'), has been reconstructed. This analysis has drawn characters into question that were used to differentiate E. danae from another species occurring at the same time, Euproops rotundatus from the British Middle Coal Measures. More precisely, early post-embryonic stages of Piesproops resemble E. danae; later stages resemble E. rotundatus. Based on this earlier study, the here-described reinvestigation of E. danae has been performed as the ontogenetic sequence itself may yield more reliable characters for differentiating species of Euproops. We could identify eight different growth stages for E. danae. This ontogenetic sequence shows a comparable growth to that of Piesproops, but differs markedly in the development of the opisthosomal flange. This character may serve as a basis for reliably differentiating these species. Additionally, analysing the ontogeny of further species may offer the basis for identifying heterochronic shifts in the evolution of xiphosurans.</p>","PeriodicalId":50588,"journal":{"name":"Development Genes and Evolution","volume":"228 1","pages":"63-74"},"PeriodicalIF":0.8,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35760648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mutation independently affects reproductive traits and dauer larvae development in mutation accumulation lines of Caenorhabditis elegans. 突变独立影响秀丽隐杆线虫突变积累系的生殖性状和幼虫发育。
IF 0.8 3区 生物学
Development Genes and Evolution Pub Date : 2017-11-01 Epub Date: 2017-11-23 DOI: 10.1007/s00427-017-0596-1
Arthur J Hills, James W M Green, Simon C Harvey
{"title":"Mutation independently affects reproductive traits and dauer larvae development in mutation accumulation lines of Caenorhabditis elegans.","authors":"Arthur J Hills, James W M Green, Simon C Harvey","doi":"10.1007/s00427-017-0596-1","DOIUrl":"10.1007/s00427-017-0596-1","url":null,"abstract":"<p><p>Developmental decisions are important in organismal fitness. For the nematode Caenorhabditis elegans, which is naturally found in the ephemeral food patches formed by rotting plant material, correctly committing to dauer or non-dauer larval development is key to genotype survival. To investigate the link between reproductive traits, which will determine how populations grow, and dauer larvae formation, we have analysed these traits in mutation accumulation lines of C. elegans. We find that reproductive traits of individual worms-the total number of progeny and the timing of progeny production-are highly correlated with the population size observed in growing populations. In contrast, we find no relationship between reproduction traits and the number of dauer larvae observed in growing populations. We also do not observe a mutational bias in dauer larvae formation. These results indicate that the control of dauer larvae formation is distinct from the control of reproduction and that differences in dauer larvae formation can evolve rapidly.</p>","PeriodicalId":50588,"journal":{"name":"Development Genes and Evolution","volume":"227 6","pages":"411-414"},"PeriodicalIF":0.8,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35280182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Expression and function of the zinc finger transcription factor Sp6-9 in the spider Parasteatoda tepidariorum. 锌指转录因子Sp6-9在蜘蛛中的表达及功能研究。
IF 0.8 3区 生物学
Development Genes and Evolution Pub Date : 2017-11-01 Epub Date: 2017-11-07 DOI: 10.1007/s00427-017-0595-2
Tatiana Königsmann, Natascha Turetzek, Matthias Pechmann, Nikola-Michael Prpic
{"title":"Expression and function of the zinc finger transcription factor Sp6-9 in the spider Parasteatoda tepidariorum.","authors":"Tatiana Königsmann, Natascha Turetzek, Matthias Pechmann, Nikola-Michael Prpic","doi":"10.1007/s00427-017-0595-2","DOIUrl":"10.1007/s00427-017-0595-2","url":null,"abstract":"<p><p>Zinc finger transcription factors of the Sp6-9 group are evolutionarily conserved in all metazoans and have important functions in, e.g., limb formation and heart development. The function of Sp6-9-related genes has been studied in a number of vertebrates and invertebrates, but data from chelicerates (spiders and allies) was lacking so far. We have isolated the ortholog of Sp6-9 from the common house spider Parasteatoda tepidariorum and the cellar spider Pholcus phalangioides. We show that the Sp6-9 gene in these spider species is expressed in the developing appendages thus suggesting a conserved role in limb formation. Indeed, RNAi with Sp6-9 in P. tepidariorum leads not only to strong limb defects, but also to the loss of body segments and head defects in more strongly affected animals. Together with a new expression domain in the early embryo, these data suggest that Sp6-9 has a dual role P. tepidariorum. The early role in head and body segment formation is not known from other arthropods, but the role in limb formation is evolutionarily highly conserved.</p>","PeriodicalId":50588,"journal":{"name":"Development Genes and Evolution","volume":"227 6","pages":"389-400"},"PeriodicalIF":0.8,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35534265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Expression patterns of duplicated snail genes in the leech Helobdella. 蜗牛重复基因在水蛭体内的表达模式。
IF 0.8 3区 生物学
Development Genes and Evolution Pub Date : 2017-11-01 Epub Date: 2017-11-29 DOI: 10.1007/s00427-017-0598-z
Jin-Se Kim, Hee-Jin Kwak, Brenda Irene Medina Jiménez, Soon Cheol Park, Ping Xiao, David A Weisblat, Sung-Jin Cho
{"title":"Expression patterns of duplicated snail genes in the leech Helobdella.","authors":"Jin-Se Kim, Hee-Jin Kwak, Brenda Irene Medina Jiménez, Soon Cheol Park, Ping Xiao, David A Weisblat, Sung-Jin Cho","doi":"10.1007/s00427-017-0598-z","DOIUrl":"10.1007/s00427-017-0598-z","url":null,"abstract":"<p><p>snail gene family members are zinc-finger transcription factors with key roles in morphogenesis. Involvement of snail family genes in mesoderm formation has been observed in insects and mammals. The snail genes are also involved in cell motility, neural differentiation, cell fate, survival decision, and left-right identity. The functions of snail genes have been studied primarily among ecdysozoans and deuterostomes, with relatively little work carried out in lophotrochozoans. In this study, we isolated two snail homologs (Hau-snail1 and Hau-snail2) from the leech Helobdella austinensis. We characterized the temporal and spatial expression patterns of these two genes by semi-quantitative RT-PCR and in situ hybridization. The expression of Hau-snail1 and Hau-snail2 correlates with ventral nerve cord (VNC) development, segmental mesoderm, and with a ring of cells that comes to lie at the base of the leech proboscis, respectively, showing similarity to the divergent expression of duplicated snail genes in polychaetes. Our results do not support the function of lophotrochozoan snail genes in mesoderm specification.</p>","PeriodicalId":50588,"journal":{"name":"Development Genes and Evolution","volume":"227 6","pages":"415-421"},"PeriodicalIF":0.8,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35648426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The effect of Wolbachia on diapause, fecundity, and clock gene expression in Trichogramma brassicae (Hymenoptera: Trichogrammatidae). 沃尔巴克氏体对芸赤眼蜂(膜翅目:赤眼蜂科)滞育、繁殖力和时钟基因表达的影响
IF 0.8 3区 生物学
Development Genes and Evolution Pub Date : 2017-11-01 Epub Date: 2017-11-29 DOI: 10.1007/s00427-017-0597-0
Somayeh Rahimi-Kaldeh, Ahmad Ashouri, Alireza Bandani, Kenji Tomioka
{"title":"The effect of Wolbachia on diapause, fecundity, and clock gene expression in Trichogramma brassicae (Hymenoptera: Trichogrammatidae).","authors":"Somayeh Rahimi-Kaldeh, Ahmad Ashouri, Alireza Bandani, Kenji Tomioka","doi":"10.1007/s00427-017-0597-0","DOIUrl":"10.1007/s00427-017-0597-0","url":null,"abstract":"<p><p>The short day lengths of late summer in moderate regions are used to induce diapause in various insects. Many studies have shown the maternal effect of photoperiod on diapause induction of Trichogramma wasps, but there is no study to show the relationship between photoperiodic regimes and clock genes in these useful biological control agents. Here, we investigated the role of photoperiods on diapause, fecundity, and clock gene expression (clk, cyc, cry2, per, and timeout) in asexual and sexual Trichogramma brassicae as a model insect to find any differences between two strains. Asexual strain was infected by Wolbachia, an endosymbiont bacterium. The diapause percentage was significantly higher under short days (8 h in sexual and 12 h in the asexual T. brassicae), although the diapause percentage of the sexual strain was significantly higher than the asexual one in all the photoperiods. The ANOVA revealed no significant changes between different photoperiods in the clock gene expression in the sexual strain but significant photoperiodic changes in clk, cyc, and timeout in the asexual strain. Our results showed that the mRNA levels of clock genes of asexual T. brassicae were significantly lower than those of sexual strain. The fecundity was significantly higher in the asexual strain. These results suggest that Wolbachia infection makes disturbance on the clock gene expression which consequently reduces the percentage of diapause but increases the fecundity in asexual T. brassicae.</p>","PeriodicalId":50588,"journal":{"name":"Development Genes and Evolution","volume":"227 6","pages":"401-410"},"PeriodicalIF":0.8,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35648425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The structure, splicing, synteny and expression of lamprey COE genes and the evolution of the COE gene family in chordates. 七鳃鳗COE基因的结构、剪接、合成、表达及COE基因家族在脊索动物中的进化。
IF 0.8 3区 生物学
Development Genes and Evolution Pub Date : 2017-09-01 Epub Date: 2017-09-05 DOI: 10.1007/s00427-017-0591-6
Ricardo Lara-Ramírez, Guillaume Poncelet, Cédric Patthey, Sebastian M Shimeld
{"title":"The structure, splicing, synteny and expression of lamprey COE genes and the evolution of the COE gene family in chordates.","authors":"Ricardo Lara-Ramírez, Guillaume Poncelet, Cédric Patthey, Sebastian M Shimeld","doi":"10.1007/s00427-017-0591-6","DOIUrl":"10.1007/s00427-017-0591-6","url":null,"abstract":"<p><p>COE genes encode transcription factors that have been found in all metazoans examined to date. They possess a distinctive domain structure that includes a DNA-binding domain (DBD), an IPT/TIG domain and a helix-loop-helix (HLH) domain. An intriguing feature of the COE HLH domain is that in jawed vertebrates it is composed of three helices, compared to two in invertebrates. We report the isolation and expression of two COE genes from the brook lamprey Lampetra planeri and compare these to COE genes from the lampreys Lethenteron japonicum and Petromyzon marinus. Molecular phylogenetic analyses do not resolve the relationship of lamprey COE genes to jawed vertebrate paralogues, though synteny mapping shows that they all derive from duplication of a common ancestral genomic region. All lamprey genes encode conserved DBD, IPT/TIG and HLH domains; however, the HLH domain of lamprey COE-A genes encodes only two helices while COE-B encodes three helices. We also identified COE-B splice variants encoding either two or three helices in the HLH domain, along with other COE-A and COE-B splice variants affecting the DBD and C-terminal transactivation regions. In situ hybridisation revealed expression in the lamprey nervous system including the brain, spinal cord and cranial sensory ganglia. We also detected expression of both genes in mesenchyme in the pharyngeal arches and underlying the notochord. This allows us to establish the primitive vertebrate expression pattern for COE genes and compare this to that of invertebrate chordates and other animals to develop a model for COE gene evolution in chordates.</p>","PeriodicalId":50588,"journal":{"name":"Development Genes and Evolution","volume":"227 5","pages":"319-338"},"PeriodicalIF":0.8,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35325292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Regulation and function of odd-paired in Tribolium segmentation. 奇对在Tribolium分割中的调节和作用。
IF 0.8 3区 生物学
Development Genes and Evolution Pub Date : 2017-09-01 Epub Date: 2017-08-08 DOI: 10.1007/s00427-017-0590-7
Chong Pyo Choe, Frank Stellabotte, Susan J Brown
{"title":"Regulation and function of odd-paired in Tribolium segmentation.","authors":"Chong Pyo Choe, Frank Stellabotte, Susan J Brown","doi":"10.1007/s00427-017-0590-7","DOIUrl":"10.1007/s00427-017-0590-7","url":null,"abstract":"<p><p>The pair-rule gene odd-paired (opa) is required for the patterning of alternate segment boundaries in the early Drosophila embryo. Mutant phenotypes of opa display a typical pair-rule phenotype in which most of each odd-numbered denticle belt is eliminated. However, among the nine Drosophila pair-rule genes, opa is the only gene that is not expressed in stripes with double segmental periodicity; its transcript and protein are expressed in a broad domain within segmenting embryos. While expression patterns of orthologs of opa have been analyzed in several arthropod species, their regulation and function in segmentation were largely unknown. Here, we analyzed the expression patterns, regulation, and function of the Tribolium ortholog of opa (Tc-opa). Tc-opa is expressed in segmental stripes in the early stages of segmentation and then is expressed in a broad domain at the growth zone of elongating germbands where new segments form. This broad expression of Tc-opa is processed into segmental stripes once the trunk has become segmented. Tc-opa expression is regulated positively and negatively by even-skipped and odd-skipped, respectively. However, knock-down of Tc-opa does not affect embryonic segmentation. Our findings suggest that Tc-opa expression is regulated by the pair-rule gene network even though its requirement for segmentation is uncertain in Tribolium.</p>","PeriodicalId":50588,"journal":{"name":"Development Genes and Evolution","volume":"227 5","pages":"309-317"},"PeriodicalIF":0.8,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35252676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evolutionary coincidence of adaptive changes in exuperantia and the emergence of bicoid in Cyclorrhapha (Diptera). 双翅目双头虫的出现与巨翅虫适应变化的进化巧合。
IF 2.4 3区 生物学
Development Genes and Evolution Pub Date : 2017-09-01 Epub Date: 2017-09-11 DOI: 10.1007/s00427-017-0594-3
Janaina Lima de Oliveira, Iderval Silva Sobrinho-Junior, Samira Chahad-Ehlers, Reinaldo Alves de Brito
{"title":"Evolutionary coincidence of adaptive changes in exuperantia and the emergence of bicoid in Cyclorrhapha (Diptera).","authors":"Janaina Lima de Oliveira,&nbsp;Iderval Silva Sobrinho-Junior,&nbsp;Samira Chahad-Ehlers,&nbsp;Reinaldo Alves de Brito","doi":"10.1007/s00427-017-0594-3","DOIUrl":"https://doi.org/10.1007/s00427-017-0594-3","url":null,"abstract":"<p><p>The great radiation in the infraorder Cyclorrhapha involved several morphological and molecular changes, including important changes in anterior egg development. During Drosophila oogenesis, exuperantia (exu) is critical for localizing bicoid (bcd) messenger RNA (mRNA) to the anterior region of the oocyte. Because it is phylogenetically older than bcd, which is exclusive to Cyclorrhapha, we hypothesize that exu has undergone adaptive changes to enable this new function. Although exu has been well studied in Drosophila, there is no functional or transcriptional information about it in any other Diptera. Here, we investigate exu in the South American fruit fly Anastrepha fraterculus, a Cyclorrhapha of great agricultural importance that have lost bcd, aiming to understand the evolution of exu in this infraorder. We assessed its pattern of gene expression in A. fraterculus by analyzing transcriptomes from cephalic and reproductive tissues. A combination of next-generation data with classical sequencing procedures enabled identification of the structure of exu and its alternative transcripts in this species. In addition to the sex-specific isoforms described for Drosophila, we found that not only exu is expressed in heads, but this is mediated by two transcripts with a specific 5'UTR exon-likely a result from usage of a third promoter. Furthermore, we tested the hypothesis that exu is evolving under positive selection in Cyclorrhapha after divergence from lower Diptera. We found evidence of positive selection at two important exu domains, EXO-like and SAM-like, both involved with mRNA binding during bcd mRNA localization in Drosophila, which could reflect its cooptation for the new function of bcd mRNA localization in Cyclorrhapha.</p>","PeriodicalId":50588,"journal":{"name":"Development Genes and Evolution","volume":"227 5","pages":"355-365"},"PeriodicalIF":2.4,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s00427-017-0594-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35397390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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