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Dandan BIAN,Xiaoming ZHAO,Li CHEN,Jiwu TIAN,Qiuning LIU,Chunlin ZHOU,Boping Tang 한국곤충학회 2018 Entomological Research Vol.48 No.1
Eukaryotic initiation factor 5A (eIF‐5A) is a highly conserved protein found in all eukaryotic organisms that plays a key role in the regulation of many cellular processes including translation elongation, cell proliferation, programmed cell death, mRNA turnover and decay, and abiotic stress responses. In this study, the eIF‐5A gene from the Chinese oak silkworm Antheraea pernyi (Lepidoptera: Saturniidae) was characterized. The full‐length ApeIF‐5A cDNA of 1056 bp includes a 5′‐untranslated region (UTR) of 138 bp, a 3′‐UTR of 435 bp, and an open reading frame of 483 bp encoding a polypeptide of 160 amino acids. The deduced ApeIF‐5A protein shares 99 %, 82 %, and 72 % sequence identity with orthologs in Bombyx mori, Drosophila melanogaster and Homo sapiens, indicating high conservation during animal evolution. Real‐time quantitative reverse transcription PCR revealed expression in all four developmental stages and in all nine tissues tested, consistent with an important role in development. After challenge with lipopolysaccharide, the expression levels of ApeIF‐5A were markedly upregulated. Phylogenetic analysis of amino acid sequences revealed A. pernyi eIF‐5A was closely related to B. mori eIF‐5A, consistent with traditional classification and other molecular data. The results indicate the potential value of eIF‐5A in phylogenetic analysis.
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