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- 저자 : Nana Adwoa Nkuma Johnson (검색결과 2 건)
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Phylogenetic analysis and classification of insect achaete-scute complex genes
Nana Adwoa Nkuma Johnson,Yong Wang,Zhen Zeng,Guang-Dong Wang,Qin Yao,Ke Ping Chen 한국응용곤충학회 2019 Journal of Asia-Pacific Entomology Vol.22 No.2
Achaete-scute complex (ASC) genes play essential roles in neurogenesis of eukaryotes. Insect ASC genes are currently grouped into two distinct families, ASCa and ASCb. However, the identified insect ASCb family genes are not orthologous to known ASCb family genes from other animals such as nematode and mammal. Besides, many ASC genes have been annotated differently in GenBank. In this study, ASC genes from 41 insect species were obtained in silico and analyzed to clarify their evolutionary relationships with known ASC genes from other animals. Based on our analyses, a new naming system is suggested for classification of ASC genes. Firstly, a new family (ASCc) is added into the already existing two families and the gene of this family is named Asl (Achaetescute-like). Secondly, Ash4, Ash5 and Ash6 are used to name insect ASC genes that are not orthologous to ac, sc, l'sc and ase genes of Drosophila melanogaster and Ash1 to Ash3 genes of Bombyx mori. This naming system can be used to correct inappropriate annotations of insect ASC genes in GenBank and to classify newly identified insect ASC genes. Additionally, a vast difference was found in ASC gene composition among various insect species, suggesting that different insect species might have originated from various ancestral lineages.
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Ying Peng,Yong Wang,Xia-Fang Tao,Zhen Zeng,Nana Adwoa Nkuma Johnson,Qin Yao,Ke Ping Chen 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.3
The basic helix-loop-helix (bHLH) proteins are important player in regulation of various eukaryotic developmental processes such as neurogenesis, myogenesis and heart morphogenesis. The Asian citrus psyllid (Diaphorina citri) is a sap-sucking pest which is widely distributed in southern Asia and causes greening disease in citrus orchard. In this study, Diaphorina citri genome is found to encode 52 bHLH genes. Through in-depth phylogenetic analyses, all 52 Diaphorina citri bHLH (DcbHLH) genes are classified into correspondent bHLH families according to their orthology with bHLHs from fruit fly and other insect species. Examination of GenBank annotations of these 52 DcbHLH members indicated that annotations of only 21 DcbHLH proteins are consistent with our analysis. Therefore, our data provide useful information for updating annotations to other 31 DcbHLH proteins. Among the 52 DcbHLH proteins, DcClk, DcSima, DcCyc and DcCwo have dual HLH motifs, which have not been found in any other bHLH proteins. Diaphorina citri has 2, 3 and 2 bHLH members respectively in Net, Hand and SRC families while other insect species have only one member in these families. The existence of more Net, Hand and SRC family members probably means that Asian citrus psyllid possesses more complex regulatory network in controlling intervein emergence, heart morphogenesis and larval metamorphosis than other insects. These results provide a solid basis and interesting aspects for further investigations into the evolution and functions of bHLH genes in Diaphorina citri.
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