Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Linear dicentric bacterial chromosomes in Agrobacterium tumefaciens natural isolates reveal common constraints for replicon fusion

ABSTRACT: Linear dicentric bacterial chromosomes in Agrobacterium tumefaciens natural isolates reveal common constraints for replicon fusion

PROVIDER: PRJNA1201172 | ENA |

REPOSITORIES: ENA

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
	SRR31795745_1.fastq.gz	Fastqsanger.gz
	SRR31795745_2.fastq.gz	Fastqsanger.gz
	SRR31795746_1.fastq.gz	Fastqsanger.gz
	SRR31795746_2.fastq.gz	Fastqsanger.gz
	SRR31795747_1.fastq.gz	Fastqsanger.gz

Items per page:

1 - 5 of 12

Similar Datasets

Linear dicentric bacterial chromosomes in Agrobacterium tumefaciens natural isolates reveal common constraints for replicon fusion

Project description:Multipartite bacterial genome organization can confer advantages including coordinated gene regulation and faster genome replication, but is challenging to maintain. Agrobacterium tumefaciens lineages often contain a circular chromosome (Ch1), a linear chromosome (Ch2), and multiple plasmids. We previously observed that in some stocks of the lab model strain C58, Ch1 and Ch2 were fused into a linear dicentric chromosome. Here we analyzed Agrobacterium natural isolates from the French Collection for Plant-Associated Bacteria (CFBP) and identified two strains with fused chromosomes. Chromosome conformation capture identified integration junctions that were different from the C58 fusion strain. Genome-wide DNA replication profiling showed both replication origins remained active. Transposon sequencing revealed that partitioning systems of both chromosome centromeres were essential. Importantly, the site-specific recombinases XerCD are required for the survival of the strains containing the fusion chromosome. Our findings show that replicon fusion occurs in natural environments and that balanced replication arm sizes and proper resolution systems enable the survival of such strains.

2025-05-05 | GSE285100 | GEO

Conformation and dynamic interactions of the multipartite genome in Agrobacterium tumefaciens

Project description:Bacterial species from diverse phyla contain multiple replicons, yet how these multipartite genomes are organized and segregated during the cell cycle remains poorly understood. Agrobacterium tumefaciens has a 2.8 Mb circular chromosome (Ch1), a 2.1 Mb linear chromosome (Ch2), and two large plasmids (pAt and pTi). We used this alpha proteobacterium as a model to investigate the global organization and temporal segregation of a multipartite genome. Using Chromosome Conformation Capture (Hi-C) assays, we demonstrate that both the circular and the linear chromosomes but neither of the plasmids have their left and right arms juxtaposed from their origins to their termini, generating inter-arm interactions that require the broadly conserved structural maintenance of chromosomes (SMC) complex. Moreover, our studies revealed two types of inter-replicon interactions: “ori-ori clustering” in which the replication origins of all four replicons interact, and “Ch1-Ch2 alignment” in which the arms of Ch1 and Ch2 interact linearly along their lengths. We show that the centromeric proteins (ParB1 for Ch1 and RepBCh2 for Ch2) are required for both types of inter-replicon contacts. Finally, using fluorescence microscopy, we validated the clustering of the origins and observed their frequent colocalization during segregation. Altogether, our findings provide a high-resolution view of the conformation of a multipartite genome. We hypothesize that inter-centromeric contacts promote the organization and maintenance of diverse replicons.

2022-01-30 | GSE182881 | GEO

Chromosome Architecture Impacts Virulence and Competitiveness in Agrobacterium tumefaciens C58

Project description:Chromosome architecture plays a crucial role in bacterial adaptation, yet its direct impact remains unclear. Different bacterial species, and even strains within the same species, exhibit diverse chromosomal configurations, including a single circular or linear chromosome, two circular chromosomes, or a circular-linear combination. To investigate how these architectures shape bacterial behavior, we generated near-isogenic strains representing each configuration in Agrobacterium tumefaciens C58, an important soil bacterium widely used for plant genetic transformation. Strains with a single-chromosome architecture, whether linear or circular, exhibited faster growth, enhanced stress tolerance, and greater inter-strain competitiveness. In contrast, bipartite chromosome strains showed higher virulence gene expression and enhanced transient plant transformation efficiency, suggesting a pathogenic adaptation. Whole-transcriptome analysis revealed architecture-dependent gene expression patterns, underscoring the profound impact of chromosome organization on Agrobacterium fitness and virulence. These findings highlight how chromosome structure influences bacterial adaptation and shapes evolutionary trajectories.

2025-08-25 | GSE293397 | GEO

Comparative genomic hybridization of Agrobacterium tumefaciens strains on tiling arrays covering the genome of strain C58

Project description:Comparative genomic hybridizations obtained with an original Agrobacterium tumefaciens strain C58 genome-based micro-array were used to detect the presence or absence of genes homologous to those of strain C58 in 25 agrobacterial strains. These strains included six other members of genomovar G8, one to three strains for each of the nine other A. tumefaciens genomovars and one for A. larrymoorei, a sister species of the A. tumefaciens complex. An original probabilistic method was used to segment C58 replicon sequences into regions, that are absent or present in tested strains, allowing us to detect the presence of homologues of C58 coding sequences (CDSs) in tested strains.

2011-09-08 | E-MTAB-558 | biostudies-arrayexpress

Agrobacterium tumefaciens C58 whole-genome tiling microarray design and validation

Project description:This research focuses on the design, manufacturing and validation of a new Agrobacterium tumefaciens C58 whole-genome tiling microarray platform for novel RNA transcript discovery. A whole-genome tiling microarray allows both annotated genes as well as previously unknown RNA transcripts to be detected and quantified at once. The Agrobacterium tumefaciens C58 genome is re-acquired with next-generation sequencing and then used to design the tilinlg microarray with the thermodynamic analysis program Picky. Validations are performed by subjecting Agrobacterium tumefaciens C58 under various growth conditions and then using the tling microarrays to verify expected gene expression patterns.

2014-09-25 | GSE61737 | GEO

Arabidopsis thaliana Col-0 root transcriptome response to Agrobacterium tumefaciens C58

Project description:As sessile organisms, plants require dynamic pathways in order to recognize pathogens and coordinate plant defenses by signalling. Agrobacterium tumefaciens C58 is able to avoid triggering plant defenses prior to entering the cell, and therefore is only detected once infection has begun making Agrobacterium a plant pathogen to numerous plant species. Understanding plant responses to Agrobacterium will be useful in improving plant defenses and potentially may also improve plant transformation efficiency. Microarrays were utilized for detailing the global gene expression pattern in A. thaliana Col-0 roots in response to A. tumefaciens C58 for the identification of differentially expressed genes.

2014-10-28 | GSE62750 | GEO

Arabidopsis thaliana Col-0 leaf transcriptome response to Agrobacterium tumefaciens C58

Project description:As sessile organisms, plants require dynamic pathways in order to recognize pathogens and coordinate plant defenses by signalling. Agrobacterium tumefaciens C58 is able to avoid triggering plant defenses prior to entering the cell, and therefore is only detected once infection has begun making Agrobacterium a plant pathogen to numerous plant species. Understanding plant responses to Agrobacterium will be useful in improving plant defenses and potentially may also improve plant transformation efficiency. Microarrays were utilized for detailing the global gene expression pattern in A. thaliana Col-0 leafs in response to A. tumefaciens C58 for the identification of differentially expressed genes.

2014-10-28 | GSE62749 | GEO

Trancriptome analysis of Agrobacterium tumefaciens C58 cells in the presence of abundant opines

Project description:Purpose: The goals of this study is to compare the reponse of Agrobacterium tumefaciens C58 in the presence and absence of the two opines nopaline and agrocinopine (more precisely agrocinopine A) to delineated the key-genes associated to opines-response in A. tumefaciens C58.

2018-09-01 | GSE106257 | GEO

The biotroph Agrobacterium tumefaciens thrives in tumors by exploiting a wide spectrum of plant host metabolites

Project description:Purpose: The goals of this study is to compare the reponse of Agrobacterium tumefaciens C58 in the presence of GHB and GABA to delineated the key-genes associated to the response of these metabolites in A. tumefaciens C58.

2019-04-29 | GSE121889 | GEO

Agrobacterium tumefaciens

Project description:Agrobacterium tumefaciens Genome sequencing

| PRJNA734751 | ENA