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Evolution of vertebrate central nervous system is accompanied by novel expression changes of duplicate genes

Journal of genetics and Genomics 2011年第12期38卷 577-584页

作者： Yuan Chen Yun Ding ZumingZhang Wen Wang Jun-Yuan Chen Naoto Ueno Bingyu Mao State Key Laboratory of genetic Resources and Evolution Kunming Institute of Zoology Chinese Academy of Sciences Jiaochang East Road 32 Kunming 650223 China Graduate University of Chinese Academy of Sciences Beijing 100049 China School of Life Sciences Nanjing University Hankou Road Nanjing Jiangsu 210093 China Division of Morphogenesis National Institute for Basic Biology Nishigonaka 38 Myodaiji Okazaki Aichi 444-8585 Japan

The evolution of the central nervous system（CNS） is one of the most striking changes during the transition from invertebrates to vertebrates. As a major source of genetic novelties,gene duplication might play an important role in the functional innovation of vertebrate *** this study,we focused on a group of CNS-biased genes that duplicated during early vertebrate *** investigated the tempo-spatial expression patterns of 33 duplicate gene families and their orthologs during the embryonic development of the vertebrate Xenopus laevis and the cephalochordate Brachiostoma *** all the identified duplicate genes are differentially expressed in the CNS in Xenopus embryos,and more than 50%and 30%duplicate genes are expressed in the telencephalon and mid-hindbrain boundary,respectively,which are mostly considered as two innovations in the vertebrate ***,more than 50%of the amphioxus orthologs do not show apparent expression in the CNS in amphioxus embryos as detected by in situ hybridization,indicating that some of the vertebrate CNS-biased duplicate genes might arise from non-CNS genes in *** data accentuate the functional contribution of gene duplication in the CNS evolution of vertebrate and uncover an invertebrate non-CNS history for some vertebrate CNS-biased duplicate genes.

关键词： Central nervous system evolution gene duplication Expression pattern Amphioxus Xenopus

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Comparative genomics reveals the diversification of triterpenoid biosynthesis and origin of ocotilloltype triterpenes in Panax

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Plant Communications 2023年第4期4卷 271-285页

作者： Zijiang Yang Xiaobo Li Ling Yang Sufang Peng Wanling Song Yuan Lin Guisheng Xiang Ying Li Shuang Ye Chunhua Ma Jianhua Miao Guanghui Zhang Wei Chen Shengchao Yang Yang Dong National&Local Joint Engineering Research Center on Germplasm Innovation&Utilization of Chinese Medicinal Materials in Southwest China Yunnan Agricultural UniversityKunmingChina The Key Laboratory of Medicinal Plant Biology of Yunnan Province Yunnan Agricultural UniversityKunmingChina College of Food Science and Technology Yunnan Agricultural UniversityKunmingChina Guangxi Key Laboratory of Medicinal Resources Protection and genetic Improvement Guangxi Botanical Garden of Medicinal PlantsNanningChina Yunnan Plateau Characteristic Agriculture Industry Research Institute KunmingChina

gene duplication is assumed to be the major force driving the evolution of metabolite biosynthesis in *** from functional burdens,duplicated genes can mutate toward novelties until fixed due to selective ***,the extent to which this mechanism has driven the diversification of metabolite biosynthesis remains to be *** we performed comparative genomics analysis and functional characterization to evaluate the impact of gene duplication on the evolution of triterpenoid biosynthesis using Panax species as *** that whole-genome duplications(WGDs)occurred independently in Araliaceae and Apiaceae *** genomics revealed the evolutionary trajectories of triterpenoid biosynthesis in plants,which was mainly promoted by WGDs and tandem *** synthase(LAS)was likely derived from a tandemduplicate of cycloartenol synthase that predated the emergence of *** episodic diversifying selection,the LAS gene duplicates produced by g whole-genome triplication have given rise to triterpene biosynthesis in core eudicots through ***,functional characterization revealed that oxidosqualene cyclases(OSCs)responsible for synthesizing dammarane-type triterpenes in Panax species were also capable of producing ocotilloltype *** and biochemical evidence suggested that Panax genes encoding the above OSCs originated from the specialization of one OSC gene duplicate produced from a recent WGD shared by Araliaceae(Pg-b).Our results reveal the crucial role of gene duplication in diversification of triterpenoid biosynthesis in plants and provide insight into the origin of ocotillol-type triterpenes in Panax species.

关键词： gene duplication Panax genomes whole-genome duplications triterpenoid biosynthesis ocotilloltype triterpenes specialization

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Co-option of zona pellucida sperm-binding proteins for egg freezing avoidance in Antarctic notothenioid fish

Co-option of zona pellucida sperm-binding proteins for egg f...

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2014年中国水产学会学术年会

作者： Zhanling Ma Key Laboratory of Aquaculture Resources and Utilization Ministry of Education College of Fisheries and Life SciencesShanghai Ocean University

Freezing avoidance is a prerequisite trait for the Antarctic notothenioids to survive the subzero temperature, and is currently known to be conferred by the presence of Antifreeze glycoproteins（AFGPs）. Being largely deficient in AFGPs, how the nascently spawned eggs resist to freezing in the icy environment is unknown. The Zona pellucida（ZP） gene family, collectively encode egg chorion which plays essential roles in sperm-egg recognition, has been found substantially amplified in the Antarctic notothenioids. We report here the discovery of a previously unrecognized activity, the ice-inhibition function of ZP proteins. Individually expressed Antarctic notothenioid ZPs（noto ZPs） are capable of binding with ice and significantly depress the freezing point（f.p.） of a solution（by 0.3 to 1℃） at molar concentrations lower than the AFGPs would do. Ice inhibition activity of the chorion proteins, both individually or collectively, is elevated in Antarctic notothenioids comparing with teleosts of non-freezing zones. Deletion of the ZP domain abolished the ice-inhibition activity of the noto ZPs indicated involvement of the conserved ZP domain in ice-inhibition. Chorion of a noto ZP transgenic zebrafish showed increased ice inhibition demonstrated the conferability of freezing avoidance by the noto ZPs to other fish. Survey of notothenioids from different temperature regimes showed a positive correlation between the extents of ZP gene duplication and the severity of freezing conditions of the fish habitats, and found noto ZPs evolved under positive selection. The evidence indicated evolutionarily elaboration of a primordial ice-binding activity associated with ZP domain by the Antarctic notothenioids to cope with extra challenges imposed by the freezing temperatures in reproduction.

关键词： Zona pellucida(ZP) proteins Freezing avoidance gene duplication Transgenic zebrafish Recombinant protein

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Genome-wide comparative analysis of MADS-box gene family in two Pyrus species

Genome-wide comparative analysis of MADS-box gene family in ...

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2017中国长三角遗传学大会

作者： Dandan Meng Yunpeng Cao Qing Jin Dahui Li Yi Lin Yongping Cai School of Life Sciences Anhui Agricultural University

The MADS-box gene family is an important transcription factor in plants,they widely regulate the process of plant growth,development and *** the MADS-box gene family has been studied in many plants,but they have not been comprehensive studied in the closely related species Chinese pear and European *** this study,74 and 72 members of the MADS-box gene family were identified in Chinese pear and European Pear, ***,the analysis of evolutionary,gene structure, conserved motif,chromosome localization,microcollinearity,selection pressure,functional classification and expression pattern during pear fruit development were carried *** to these analyses,these 146 MADSbox genes can be clustered into five(Mα,Mβ,Mγ,MIKC and MIKC) groups, and the MIKC group was further divided into 11 subfamilies in two Pyrus *** distribution of MADS-box genes on each chromosome in both Chinese pear and European pear were significantly ***-seven orthologous,nineteen PbrMADS paralogous,and twenty-five PcpMADS paralogous gene pairs were *** them,we identified two tandem duplication events and seventy-nine segmental duplication events,which indicating that the expansion of the MADS-box gene family derived from segmental duplication *** expression profiles between two Pyrus species fruits suggested functional differences for some of the orthologous genes originated from common ancestor and neo-functionalization or subfunctionalization for some of *** conclusion,this study provide a useful reference for further analysis the mechanisms of species differentiation and biodiversity formation among closely related species.

关键词： pear MADS-box gene duplication microsynteny expression pattern

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A tandem array of ent-kaurene synthases in maize with roles in gibberellin and more specialized metabolism

A tandem array of ent-kaurene synthases in maize with roles ...

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2016年全国植物生物学大会

作者： Jingye Fu Fei Ren Hongjie Mao Qiang Wang Institute of Ecological Agriculture Sichuan Agricultural University

While most commonly associated with its role in gibberellin(GA) phytohormone biosynthesis,entkaurene also serves as an intermediate in more specialized diterpenoid metabolism,as exemplified by the more than 800 known derived natural products. Among these are the maize kauralexins. However,no ent-kaurene synthases(KSs) have been identified from maize. The maize GA-deficient dwarf-5(d5) mutant has been associated with a loss of KS activity. The relevant genetic lesion has been previously mapped,and was found here to correlate with the location of the KS-like gene Zm KSL3. Intriguingly,this forms part of a tandem array with two other terpene synthases(TPSs). Although one of these,Zm TPS1,has been previously reported to encode a sesquiterpene synthase,and both Zm TPS1 and that encoded by the third gene,Zm KSL5,have lost the N-terminal ?-domain prototypically associated with KS(L)s,all three genes fall within the KS(L) or TPS-e sub-family. Here it is reported that all three genes encode enzymes that are targeted to the plastid in planta,where diterpenoid biosynthesis is initiated,and which all readily catalyze the production of ent-kaurene. Consistent with the closer phylogenetic relationship of Zm KSL3 with previously identified KSs from cereals,only transcription of this gene is affected in d5 plants. On the other hand,the expression of all three of these genes is inducible,suggesting a role in more specialized metabolism,such as that of the kauralexins. Thus,these results clarify not only gibberellin phytohormone,but also diterpenoid phytoalexin biosynthesis in this important cereal crop plant.

关键词： gibberellin phytoalexin kaurene terpene synthase gene duplication

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Identification of a novel Gig2 gene family specific to non-amniote vertebrates

Identification of a novel Gig2 gene family specific to non-a...

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中国水产学会鱼病专业委员会2013年学术研讨会

作者： Yi-Bing Zhang Ting-Kai Liu Jun Jiang Jun Shi Ying Liu Shun Li Jian-Fang Gui State Key Laboratory of Freshwater Ecology and Biotechnology Institute of HydrobiologyChinese Academy of Sciences

Gig2(grass carp reovirus(GCRV)-induced gene 2)is first identified as a novel fishinterferon(IFN)-stimulated gene(ISG).Overexpression of a zebrafish Gig2 gene can protectcultured fish cells from virus *** the present study,we identify a novel gene family that iscomprised of genes homologous to the previously characterized ***/GSS search and insilico cloning identify 190 Gig2 homologous genes in 51 vertebrate species ranged from lampreysto *** large-scale search of vertebrate and invertebrate genome databases indicatethat Gig2 gene family is specific to non-amniotes including lampreys,sharks/rays,ray-finnedfishes and *** analysis and synteny analysis reveal lineage-specificexpansion of Gig2 gene family and also provide valuable evidence for the fish-specific genomeduplication(FSGD)*** Gig2 family proteins exhibit no significant sequencesimilarity to any known proteins,a typical Gig2 protein appears to consist of two conserved parts:an N-terminus that bears very low homology to the catalytic domains of poly(ADP-ribose)polymerases(PARPs),and a novel C-terminal domain that is unique to this gene *** profiling of zebrafish Gig2 family genes shows that some duplicate pairs havediverged in function via acquisition of novel spatial and/or temporal expression under *** specificity of this gene family to non-amniotes might contribute to a large extent to distinctphysiology in non-amniote vertebrates.

关键词： grass carp reovirus(GCRV)-induced gene 2 lineage-specific expansion gene duplication phylogenectic tree gene structure

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A comparative genome analysis of PME and PMEI families reveals the evolution of pectin metabolism in plant cell walls

A comparative genome analysis of PME and PMEI families revea...

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第十四届全国植物基因组学大会

作者： Maojun Wang Daojun Yuan Wenhui Gao Yang Li Jiafu Tan Xianlong Zhang National Key Laboratory of Crop genetic Improvement Huazhong Agricultural University

Pectins are fundamental polysaccharides in the plant primary cell *** are synthesized and secreted to cell walls as highly methyl-esterified polymers and then demethyl-esterified by pectin methylesterases(PMEs),which ... 详细信息

关键词： pectin methylesterases pectin methylesterases inhibitor cell wall gene origin gene duplication

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Adaptive evolution of sucrose specific hydrolase in Lepidoptera

Adaptive evolution of sucrose specific hydrolase in Lepidopt...

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中国蚕学会第十届青年学术研讨会

作者： Huabing Wang Xiaotong Li Xiangping Dai Yanyan Zhou Yanting Liang College of Animal Sciences Zhejiang University

Sucrose is the main product of photosynthesis in plants,providing a rich carbon and energy source for the physiological growth and development of *** a previous study,we identified a novel sucrose hydrolase（SUH） in the larval midgut of Bombyx ***,we found that SUH was diverged from the α-glucosidase family during the early evolution of Lepidoptera,then it duplicated into SUH1 and SUH2 in several species of *** two differentiation times were in accordance with the radiative eruption of seed plants and angiosperms,*** pressure analysis showed that SUH went through significant positive evolution during the evolution *** sites were determined which affected by both of the functional divergence and positive *** nine sites were located around the ligand-binding groove of SUH,and they could be responsible for the ligand-binding preference and hydrolytic specificity of SUH for *** addition,we also found that this duplication and subsequent diversification produced two Suh genes in Papilio *** two PxSuh genes were significantly divergent in terms of their expression pattern and enzyme *** with PxSUH2,which has maintained the original gene function of maltose hydrolysis,PxSUH1 exhibits substrate specificity for sucrose with an optimum enzyme activity occurring at an alkaline p *** data show that PxSuh1 is evolutionarily adapted for effective functioning in an alkaline digestive ***,we find that functional diversification of Suh facilitates *** to digestive carbohydrate of host *** study sheds new light on the molecular mechanisms underlying the adaptive evolution of digestive enzymes in Lepidoptera.

关键词： Sucrose hydrolase Lepidoptera gene duplication Functional divergence

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