Project description:To learn more about the global effects of phosphatidylcholine (PC)-deficiency in A. tumefaciens, we performed transcriptomic studies comparing the wild type and a PC-deficient DpmtA Dpcs mutant. We expanded the number of affected virulence genes and showed that the loss of PC was correlated with altered expression of multiple genes encoding membrane or membrane-associated proteins and proteins which fulfil their function at the membrane. The PC-deficient mutant analyzed in this study is further described in Sonja Klüsener, Stephanie Hacker, Yun-Long Tsai, Julia E. Bandow, Ronald Gust, Erh-Min Lai and Franz Narberhaus. 2010. Proteomic and transcriptomic characterization of a virulence-deficient phosphatidylcholine-negative Agrobacterium tumefaciens mutant.
Project description:To learn more about the global effects of phosphatidylcholine (PC)-deficiency in A. tumefaciens, we performed transcriptomic studies comparing the wild type and a PC-deficient DpmtA Dpcs mutant. We expanded the number of affected virulence genes and showed that the loss of PC was correlated with altered expression of multiple genes encoding membrane or membrane-associated proteins and proteins which fulfil their function at the membrane. The PC-deficient mutant analyzed in this study is further described in Sonja Klüsener, Stephanie Hacker, Yun-Long Tsai, Julia E. Bandow, Ronald Gust, Erh-Min Lai and Franz Narberhaus. 2010. Proteomic and transcriptomic characterization of a virulence-deficient phosphatidylcholine-negative Agrobacterium tumefaciens mutant. Total RNA was extracted from A. tumefaciens C58 wild-type and PC-deficient mutant cells grown under virulence-induced and non-induced conditions. The 4-plex NimbleGen Gene Expression Array for A. tumefaciens (Design ID 080630) represents 5344 genes and is based on NCBI reference sequences NC_003062, NC_003063, NC_003064 and NC_003065. Each gene is represented by 6 probes (45mer-60mer oligonucleotides), each in two copies on different locations on the array. Three biological replicates for each cultivation condition were analyzed for A. tumefaciens wild-type and PC-deficient mutant strains.
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.
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.
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.
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.
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. 3-week-old A.thaliana Col-0 seedlings were selected for growth in hydroponic systems. A. tumefaciens C58 was inoculated into the hydroponic system and co-cultivation persisted for 8 hours. Leaf tissue was seperated for RNA extraction and hybridization to the ATH1 Affymetrix microarray.
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. 3-week-old A.thaliana Col-0 seedlings were selected for growth in hydroponic systems. A. tumefaciens C58 was inoculated into the hydroponic system and co-cultivation persisted for 8 hours. Root tissue was seperated for RNA extraction and hybridization to the ATH1 Affymetrix microarray.