Expression analysis and tissue distribution of two 14-3-3 proteins in silkworm ( Bombyx mori)

• Published in: Biochimica et biophysica acta Vol. 1770; no. 12; pp. 1598 - 1604
• Main Authors: Kong, Lingyin, Lv, Zhengbing, Chen, Jian, Nie, Zuoming, Wang, Dan, Shen, Hongdan, Wang, Xuedong, Wu, Xiangfu, Zhang, Yaozhou
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 01.12.2007
• Subjects: 14-3-3 protein; 14-3-3 Proteins - chemistry; 14-3-3 Proteins - classification; 14-3-3 Proteins - metabolism; Amino Acid Sequence; Animals; Base Sequence; Bombyx - genetics; Bombyx - metabolism; Bombyx mori; DNA Primers; DNA, Complementary; Electrophoresis, Polyacrylamide Gel; EST; Expression analysis; Gene Expression Profiling; Molecular Sequence Data; Phylogeny; Polymerase Chain Reaction; Real time PCR; Sequence Homology, Amino Acid; Expression analysis; 14-3-3 protein; Bombyx mori; Real time PCR; EST
• ISSN: 0304-4165; 0006-3002; 1872-8006
• DOI: 10.1016/j.bbagen.2007.08.005

14-3-3 proteins, which have been identified in a wide variety of eukaryotes, are highly conserved acidic proteins. In this study, we identified two genes in silkworm that encode 14-3-3 proteins (Bm14-3-3ζ and Bm14-3-3ε). Category of two 14-3-3 proteins was identified according to phylogenetic analysis. Bm14-3-3ζ shared 90% identity with that in Drosophila, while Bm14-3-3ε shared 86% identity with that in Drosophila. According to Western blot and real time PCR analysis, the Bm14-3-3ζ expression levels are higher than Bm14-3-3ε in seven tissues and in four silkworm developmental stages examined. Bm14-3-3ζ was expressed during every stage of silkworm and in every tissue of the fifth instar larvae that was examined, but Bm14-3-3ε expression was not detected in eggs or heads of the fifth instar larvae. Both 14-3-3 proteins were highly expressed in silk glands. These results suggest that Bm14-3-3ζ expression is universal and continuous, while Bm14-3-3ε expression is tissue and stage-specific. Based on tissue expression patterns and the known functions of 14-3-3 proteins, it may be that both 14-3-3 proteins are involved in the regulation of gene expression in silkworm silk glands.