Transcriptional analysis reveals the metabolic state of Burkholderia zhejiangensis CEIB S4-3 during methyl parathion degradation

PeerJ

article

María Luisa Castrejón-Godínez¹  Ma. Laura Ortiz-Hernández¹  Emmanuel Salazar¹  Sergio Encarnación²  Patricia Mussali-Galante¹  Efraín Tovar-Sánchez³  Enrique Sánchez-Salinas¹  Alexis Rodríguez¹ 

[1] Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos;Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México;Centro de Investigación en Biodiversidad y Conservación, Universidad Autónoma del Estado de Morelos

关键词: Gene expression;    Pesticide biodegradation;    Methyl parathion;    Transcriptomic analysis;   

DOI  :  10.7717/peerj.6822

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Burkholderia zhejiangensis CEIB S4-3 has the ability to degrade methyl parathion (MP) and its main hydrolysis byproduct p-nitrophenol (PNP). According to genomic data, several genes related with metabolism of MP and PNP were identified in this strain. However, the metabolic state of the strain during the MP degradation has not been evaluated. In the present study, we analyzed gene expression changes during MP hydrolysis and PNP degradation through a transcriptomic approach. The transcriptional analysis revealed differential changes in the expression of genes involved in important cellular processes, such as energy production and conversion, transcription, amino acid transport and metabolism, translation, ribosomal structure and biogenesis, among others. Transcriptomic data also exhibited the overexpression of both PNP-catabolic gene clusters (pnpABA′E1E2FDC and pnpE1E2FDC) present in the strain. We found and validated by quantitative reverse transcription polymerase chain reaction the expression of the methyl parathion degrading gene, as well as the genes responsible for PNP degradation contained in two clusters. This proves the MP degradation pathway by the strain tested in this work. The exposure to PNP activates, in the first instance, the expression of the transcriptional regulators multiple antibiotic resistance regulator and Isocitrate Lyase Regulator (IclR), which are important in the regulation of genes from aromatic compound catabolism, as well as the expression of genes that encode transporters, permeases, efflux pumps, and porins related to the resistance to multidrugs and other xenobiotics. In the presence of the pesticide, 997 differentially expressed genes grouped in 104 metabolic pathways were observed. This report is the first to describe the transcriptomic analysis of a strain of B. zhejiangensis during the biodegradation of PNP.

【 授权许可】

CC BY