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| Status |
Public on May 05, 2018 |
| Title |
iac gene expression in the indole-3-acetic acid-degrading soil bacterium Enterobacter soli LF7 |
| Organism |
Enterobacter soli |
| Experiment type |
Expression profiling by high throughput sequencing
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| Summary |
We show for soil bacterium Enterobacter soli LF7 (synonym Enterobacter asburiae LF7a) that possession of a iac (indole 3-acetic acid catabolic) gene cluster is causatively linked to the ability to utilize the plant hormone indole 3-acetic acid (IAA) as a carbon and energy source. Genome-wide transcriptional profiling by mRNA sequencing revealed that these iac genes chromosomally arranged as iacHABICDEFG and coding for the transformation of IAA to catechol, were the most highly induced (>29-fold) among the relatively few (<1%) differentially expressed genes in response to IAA. Also highly induced and immediately downstream of the iac cluster were genes for a Major Facilitator Superfamily protein (mfs) and enzymes of the β-ketoadipate pathway (pcaIJD-catBCA), which channels catechol into central metabolism. This entire iacHABICDEFG-mfs-pcaIJD-catBCA gene set was constitutively expressed in a iacR deletion mutant, confirming the role of iacR, annotated as coding for a MarR-type regulator and located upstream of iacH, as a repressor of iac gene expression.
The research described here was funded from grants #2010-03544 and #2013-02075 awarded to JHJL by the United States Department of Agriculture (USDA) National Institute of Food and Agriculture (NIFA) Agriculture and Food Research Initiative (AFRI)
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| Overall design |
Orthogonal comparison of gene expression profiles generated by illumina sequencing of RNA from two bacterial strains, i.e. wildtype (wt or WT) Enterobacter soli LF7 and its iacR targeted deletion mutant ΔiacR::cat (mut or DeltaR), growing on succinate, and spiked with 200uM indole-3-acetic acid (+IAA or IAA200) or not (-IAA or H2O).
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| Web link |
http://aem.asm.org/content/early/2018/07/23/AEM.01057-18.long
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| Contributor(s) |
Leveau JH, Greenhut IV |
| Citation(s) |
30054366 |
| Submission date |
May 04, 2018 |
| Last update date |
Aug 14, 2018 |
| Contact name |
Johan Leveau |
| E-mail(s) |
jleveau@ucdavis.edu
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| Phone |
5307525046
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| Organization name |
University of California, Davis
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| Department |
Plant Pathology
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| Street address |
One Shields Ave
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| City |
Davis |
| State/province |
CA |
| ZIP/Postal code |
95616 |
| Country |
USA |
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| Platforms (1) |
| GPL24961 |
Illumina HiSeq 4000 (Enterobacter soli) |
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| Samples (12)
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| Relations |
| BioProject |
PRJNA463330 |
| SRA |
SRP144620 |
| Supplementary file |
Size |
Download |
File type/resource |
| GSE114050_raw_counts.txt.gz |
118.5 Kb |
(ftp)(http) |
TXT |
SRA Run Selector |
| Raw data are available in SRA |
| Processed data are available on Series record |
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