Essien Sakyi Michael , Junlin Wang , Huanying Pang , Jia Cai , Felix Kofi Agbeko Kuebutornye

1 College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China
2 Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Animals, Zhanjiang, 524088, China
3 Key Laboratory of Control for Diseases of Aquatic Animals of Guangdong Higher Education Institutes, Zhanjiang 524088, China
Author    Correspondence author
Genomics and Applied Biology, 2018, Vol. 9, No. 6   doi: 10.5376/gab.2018.09.0006
Received: 15 Aug., 2018    Accepted: 23 Aug., 2018    Published: 10 Sep., 2018

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Michael E.S., Wang J.L., Pang H.Y., Cai J., Kuebutornye F.K.A, 2018, Molecular cloning and bioinformatics analysis of LuxR from Vibrio harveyi HY99, Genomics and Applied Biology, 9(6): 32-39 (doi: 10.5376/gab.2018.09.0006)

LuxR gene functions as an activator, repressor, directly and indirectly controls the 625 gene expression. The LuxR gene was encoded from Vibrio harveyi, cloned, sequenced and amplified by PCR technology. The total length of the gene is 635 bp, and encoded 211 amino acids. The physicochemical properties, protein structure and genetic evolutionary relationship LuxR of Vibrio harveyi HY99 were studied and analyzed by bioinformatics methods and tools. The phylogenetic tree was constructed using MEGA 7.0 software with Neighbour-joining method. The results showed that LuxR is a stable hydrophilic and acidic protein without a transmembrane region and a signal peptide. The evolutionary analysis showed that Vibrio campbelli and Vibrio jasicida was clustered together, which indicated that the genetic relationship between the two species was the closest LuxR contains a TetR_N superfamily conserved domain associated with cell division. The 3D structure model of LuxR subunit was simulated by SWISS-MODEL software and was found that the LuxR gene belong to LuxR family transcriptional regulator. LuxR gene functions as a repressor, activator and control gene expression directly and indirectly. This conclusion could provide the basis for further research on the function and mechanism of LuxR related protein, so as to lay a foundation for understanding the mechanism of the osmotic adjustment of Vibrio harveyi.

Vibrio harveyi; LuxR; transcriptional; hydrophilic