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Baculovirus phylogeny and evolution 总被引:1,自引:0,他引:1
The family Baculoviridae represents one of the largest and most diverse groups of viruses and a unique model for studying the forces driving the evolution and biodiversity of double-stranded DNA viruses with large genomes. With the advent of comparative genomics, the phylogenetic relationships of baculoviruses have been put on solid bases. This, as well as improved bioinformatic approaches, has provided a detailed picture of baculovirus phylogeny and evolution. According to the present knowledge, baculoviruses can be classified into at least four evolutionary lineages: the most ancestral dipteran nucleopolyhedroviruses, the hymenopteran nucleopolyhedroviruses and the lepidopteran nucleopolyhedroviruses and granuloviruses. Despite the growing understanding of baculovirus phylogeny and macro-evolution, our knowledge of the micro-evolutionary processes within baculovirus species and virus populations is still limited. Here we present the state of the art on baculovirus phylogeny and evolution. 相似文献
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In this report, factors involved in baculovirus DNA replication are reviewed. These include factors that are required for DNA synthesis, other factors that have been implicated in genome processing or packaging, and homologs of proteins that are involved in DNA replication or repair in other systems. Conservation of a number of these factors in all baculovirus genomes suggest that many of the observations for specific viral systems may apply to the most if not all members of the Baculoviridae. 相似文献
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Jupp RA Palmer AM Greengrass PM;Society for Medicines Research 《Drug news & perspectives》2000,13(3):188-192
We are in the midst of a genomics revolution. The first chapter of this revolution will end later this year with the completion of the first draft of the entire human genome; estimates for the exact number of genes in the human genome vary from 50,000 to 140,000. This endeavor has been a major catalyst for the genomics revolution and has moved science into uncharted territories, which has led to the need to establish both new disciplines and a new vocabulary. Thus we now have pharmacogenomics, genotyping, pharmacogenetics, microarrays, biochips, differential display, bioinformatics and cheminformatic. The meeting provided a taste of the wealth of information that is now being accumulated under the name of both genomics and proteomics. The challenge ahead will be turning this information into knowledge and then translating this knowledge into new therapies. 相似文献
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Jaryal AK 《Indian journal of physiology and pharmacology》2007,51(2):105-108
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Baculovirus infectivity and the actin cytoskeleton 总被引:2,自引:0,他引:2
Volkman LE 《Current drug targets》2007,8(10):1075-1083
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Buchanan SG 《Current opinion in drug discovery & development》2002,5(3):367-381
Considerable advances in structural genomics have been witnessed in the last year. Several pilot studies have begun to report their initial results, and new centers have been funded to join the endeavor. The legacies of the genome sequencing efforts, namely high-throughput molecular biology and whole-organism genome sequences, have been integrated as front-end modules for structural genomics pipelines. Impressive advances have been made in NMR spectroscopy and X-ray crystallography. New methods in structural bioinformatics and computational chemistry have been published that provide the means to exploit the wealth of new information in drug discovery. Not surprisingly, the biopharmaceutical industry has been quick to recognize the benefits of these new developments and has begun to adopt them. This article reviews recent results from structural genomics initiatives and the potential applications of new information and technologies in the drug discovery process. 相似文献
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Functional expression of recombinant proteins has become a routine, but critical tool in modern molecular biology. Since their introduction, the use of baculovirus vectors to produce proteins for purification has become one of the most widely-used viral gene delivery systems as expression levels obtained are difficult to match with any other eukaryotic expression system. Extensive engineering to simplify and accelerate the process of recombinant virus construction has made this system accessible to virtually any modern biological laboratory. The utility of baculoviruses has been broadened with the discovery that appropriately modified virus can mediate gene expression in a wide variety of mammalian cell lines, and thus can function as a flexible cell-based assay development tool. The wide range of applications and potential for commercialization of products leads to consideration of a number of aspects of the system. 相似文献
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Functional genomics is a challenging new way to address a complex disease like osteoarthritis on a molecular level. Despite osteoarthritis being ultimately a biochemical problem, mainly characterized by an imbalanced cartilage matrix turnover, a deeper understanding of molecular events within the tissue cells (i.e., the chondrocytes) will provide not only a better understanding of pathogenetic mechanisms but also new diagnostic markers and cellular targets for therapeutic intervention. This innovative technology represents a challenging approach complementing (not replacing) classical research in previously described and new disease-relevant genes: large-scale functional genomics will open up new areas of so far unrecognized molecular networks. This will include as yet unidentified players in the anabolic-catabolic balance of matrix turnover of articular cartilage as well as disease-relevant intracellular signaling cascades so far hardly investigated in articular chondrocytes. However, care must be taken not to over or misinterpret results and some major challenges must be overcome in order to properly utilize the potential of this technology in the field of osteoarthritis. 相似文献
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目的:利用Bac-to-Bac杆状病毒表达系统在BHK细胞表达重组鼠白细胞介素(IL)-2蛋白。方法:用Flag标记鼠IL-2并加入真核细胞启动子CMV,构建重组质粒pFB-CMV-IL-2并予酶切和PCR鉴定;将鼠IL-2克隆入杆状病毒表达载体pFastBacDual中,将pFB-CMV-IL-2转化到含杆状病毒穿梭载体Bacmid的DH10Bac感受态菌中,筛选阳性克隆,获得重组杆状病毒载体Bacmid-pFB-CMV-IL-2,抽提质粒;用脂质体转染法将Bacmid-pFB-CMV-IL-2转染Sf9昆虫细胞包装病毒,收获重组杆状病毒,将构建病毒转导BHK细胞培养,用Western blot检测IL-2蛋白。结果:通过杆状病毒表达系统,在BHK细胞成功表达重组的鼠IL-2蛋白。结论:重组杆状病毒在真核细胞中成功表达重组鼠IL-2蛋白。 相似文献
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目的利用杆状病毒表达系统(BEVS)构建含乙型肝炎病毒核心抗原(HBcAg)基因的重组杆状病毒。方法采用PCR法从含乙型肝炎病毒全基因序列(adw)的质粒pHBV1中扩增出HBVC基因,亚克隆到pGEM-T载体,然后将HBVC基因插入载体pAcGHLT-A中,构建含有HBVC基因的重组质粒pAcGHLT-HBcAg,与苜蓿银纹夜蛾核型多角体病毒(AcNPV)联合转染秋粘虫细胞(Sf9),获得含有HBVC基因的重组杆状病毒。采用限制性内切酶酶切和DNA序列分析对重组病毒进行鉴定。结果利用杆状病毒表达系统,成功地构建了含HBVc基因的重组杆状病毒,感染昆虫细胞Sf9后,PCR检测可以扩增出相应大小的片段。结论利用BEVS成功构建了含有HBVC基因的重组杆状病毒,为进一步的研究奠定了基础。 相似文献