Cloning and function analysis of elongase of very long chain fatty acid gene Bmelo424 in silkworm.

Weidong Zuo; Ning Kang; Chunlin LI; Yue Luan; Xiaoling Tong; Fangyin Dai; Cheng LU

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Cloning and function analysis of elongase of very long chain fatty acid gene Bmelo424 in silkworm.

Author: Weidong ZUO ¹ ; Ning KANG ² ; Chunlin LI ¹ ; Yue LUAN ¹ ; Xiaoling TONG ¹ ; Fangyin DAI ¹ ; Cheng LU ¹
Author Information

1. State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400715, China.
2. College of Biotechnology, Southwest University, Chongqing 400715, China.
Publication Type:Journal Article
Keywords: Saccharomyces cerevisiae; elongase of very long chain fatty acid; expression profile; silkworm; temperature stress
MeSH: Acetyltransferases; Amino Acid Sequence; Animals; Bombyx; Cloning, Molecular; Fatty Acids; Saccharomyces cerevisiae
From: Chinese Journal of Biotechnology 2019;35(3):435-444
CountryChina
Language:Chinese
Abstract: Genes belonging to the elongases of very long chain fatty acid (ELOVL) family affect many physiological functions in organism. In this paper, Bmelo424 gene, a member of the ELOVL family in silkworm, was cloned and its ORF was 558 bp. Its protein sequence was predicted to have four transmembrane domains, six serine phosphorylation sites, eight threonine phosphorylation sites and four tyrosine phosphorylation sites, and its subcellular localization was in the endoplasmic reticulum. Secondary structure analysis showed that the percentage of alpha-helix and beta-strand was 26.7% and 20% respectively. The results of fluorescence quantitative PCR showed that Bmelo424 gene was expressed in all tissues of silkworm, especially with the highest expression in head. By heterologous expression of Bmelo424 gene in Saccharomyces cerevisiae, the effect of Bmelo424 gene on fatty acid elongation was studied. GC-MS results indicated that the fatty acid content of C16:1n-7 in S. cerevisiae with pYES2-Bmelo424 recombinant plasmid increased significantly, whereas the content of C16:0, C18:0 and C18:1n-9 decreased. The results of temperature stress revealed that Bmelo424 gene could improve the low temperature adaptability of S. cerevisiae, but its high temperature adaptability decreased. This provides a reference for exploring the function of Bmelo424 gene in silkworm.