Related Experiment Video
Updated: Dec 27, 2025

Generation of Enterobacter sp. YSU Auxotrophs Using Transposon Mutagenesis
Published on: October 31, 2014
Genomic island type IV secretion system and transposons in genomic islands involved in antimicrobial resistance in
Wen-Long Dong1, Qi-Jun Xu1, Luke Atiewin Atiah1
1Department of Basic Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China.
Abstract:
Trueperella pyogenes (T. pyogenes) is a well-known opportunistic pathogen of many animal species. It can cause a variety of suppurative infections. The objective of this research was to get insight into the gene context and the location of the antimicrobial resistance determinants in the two multi-resistant T. pyogenes isolates TP3 and TP4. Comparative analysis of key factors leading to antimicrobial resistance was performed. Both isolates were resistant to erythromycin, azithromycin and tetracycline, and susceptible to ciprofloxacin, enrofloxacin, cefazolin and florfenicol. In addition, TP4 was resistant to amikacin and gentamicin. Whole-genome analyses revealed that both TP3 and TP4 contained two different genomic islands (TP3-GI1, TP3-GI5, TP4-GI5 and TP4-GI8) involved in multi-drug resistance. There is a common region in TP3-GI1 and TP4-GI5, containing the tetracycline resistance gene tet(W) and a series of genes involved in type IV secretion systems. Several genes located on TP3-GI5 and TP4-GI8 are highly homologous. Tetracycline-resistance gene tet(33) was potentially acquired by horizontal gene transfer via IS6100 located on 57,936 bp TP3-GI5. The macrolide resistance gene erm(X) was located near the end of the TP3-GI5. The sequence analysis of TP4-GI8 showed that two copies of erm(X) and two IS1634 elements located in the same orientation may have formed a composite transposon. GI-type T4SS, transposons and multiple resistance genes located on GIs play a key role in multiple drug resistance of TP3 and TP4.
More Related Videos
Related Concept Videos
Transposons
Development of Antibiotic Resistance
Gram-negative Bacterial Protein Secretion Systems
Transduction
Genomic DNA in Prokaryotes
Genomic Diversity in Bacteria
Although bacterial genomes are much...
Mechanism of Conjugation

