RESUMEN
Enterohemorrhagic Escherichia coli (EHEC) causes hemorrhagic colitis and hemolytic uremic syndrome. EHEC infection begins with bacterial adherence to the host intestine via lectin-like adhesins that bind to the intestinal wall. However, EHEC-related lectin-glycan interactions (LGIs) remain unknown. Here, we conducted a genome-wide investigation of putative adhesins to construct an LGI network. We performed microarray-based transcriptomic and proteomic analyses with E. coli EDL933. Using PSORTb-based analysis, potential outer-membrane-embedded adhesins were predicted from the annotated genes of 318 strains. Predicted proteins were classified using TMHMM v2.0, SignalP v5.0, and LipoP v1.0. Functional and protein-protein interaction analyses were performed using InterProScan and String databases, respectively. Structural information of lectin candidate proteins was predicted using Iterative Threading ASSEmbly Refinement (I-TASSER) and Spatial Epitope Prediction of Protein Antigens (SEPPA) tools based on 3D structure and B-cell epitopes. Pathway analysis returned 42,227 Gene Ontology terms; we then selected 2585 lectin candidate proteins by multi-omics analysis and performed homology modeling and B-cell epitope analysis. We predicted a total of 24,400 outer-membrane-embedded proteins from the genome of 318 strains and integrated multi-omics information into the genomic information of the proteins. Our integrated multi-omics data will provide a useful resource for the construction of LGI networks of E. coli.
Asunto(s)
Escherichia coli Enterohemorrágica/genética , Lectinas/genética , Polisacáridos/genética , Proteoma/genética , Transcriptoma/genética , Adhesinas Bacterianas/genética , Adhesión Bacteriana/genética , Epítopos de Linfocito B/genética , Proteínas de Escherichia coli/genética , Proteómica/métodosRESUMEN
A 56-year-old female goat herder had scrub typhus that persisted after receiving doxycycline for 5 days. Her symptoms continued, prompting us to perform further examinations that revealed coinfection of Q fever and scrub typhus via molecular and serological testing. We also isolated Orientia tsutsugamushi using BALB/c mice and L929 cells.