| Title |
Dirhamnose-lipid production by recombinant nonpathogenic bacterium Pseudomonas chlororaphis
|
|---|---|
| Published in |
Applied Microbiology and Biotechnology, February 2015
|
| DOI | 10.1007/s00253-015-6433-4 |
| Pubmed ID | |
| Authors |
Daniel K. Y. Solaiman, Richard D. Ashby, Nereus W. Gunther, Jonathan A. Zerkowski |
| Abstract |
We previously discovered that Pseudomonas chlororaphis NRRL B-30761 produces monorhamnolipids (R1Ls) with predominantly 3-hydroxydodecenoyl-3-hydroxydecanoate (C12:1-C10) or 3-hydroxydodecanoyl-3-hydroxydecanoate (C12-C10) as the lipid moiety under static growth conditions only. We have now cloned, sequenced, and analyzed in silico the gene locus of NRRL B-30761 containing the putative coding sequences of rhamnosyltransferase chain A (rhlA Pch , 894 bps), rhamnosyltransferase chain B (rhlB Pch , 1272 bps), and N-acyl-homoserine lactone-dependent transcriptional regulatory protein (rhlR Pch , 726 bps). The putative gene products RhlAPch (297 amino acid residues or a.a.), RhlBPch (423 a.a.), and RhlRPch (241 a.a.) only have between 60 and 65 % a.a. identities to their respective closest matched homologs in P. aeruginosa. Polymerase chain reaction (PCR)-based assay did not detect the presence of rhamnosyltransferase C gene (rhlC) in P. chlororaphis, suggesting a genetic basis for the lack of dirhamnose-lipid (R2L) synthesis in this organism. We thus genetically constructed an R2L-synthesizing P. chlororaphis by expressing a rhamnosyltransferase C (rhlC) gene of P. aeruginosa using an expression vector (pBS29-P2-gfp) containing a Pseudomonas syringae promoter. The R2L/R1L ratio is 2.4 in the rhamnolipid (RL) sample isolated from the genetically engineered (GE) P. chlororaphis [pBS29-P2-rhlC], in contrast to undetectable R2L in the GE P. chlororaphis [pBS29-P2-gfp] control cells based on LC-MS analysis. The critical micelle concentrations of the R2L and R1L samples from GE P. chlororaphis [pBS29-P2-rhlC] and the control [pBS29-P2-gfp] cells were ca. 0.1 mM, and their minimum surface tensions were ca. 26 mN/m with no significant difference. |
X Demographics
The data shown below were collected from the profile of 1 X user who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 53 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Germany | 1 | 2% |
| Unknown | 52 | 98% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 10 | 19% |
| Student > Master | 8 | 15% |
| Student > Ph. D. Student | 7 | 13% |
| Student > Bachelor | 6 | 11% |
| Student > Doctoral Student | 5 | 9% |
| Other | 5 | 9% |
| Unknown | 12 | 23% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 17 | 32% |
| Biochemistry, Genetics and Molecular Biology | 15 | 28% |
| Chemistry | 2 | 4% |
| Chemical Engineering | 1 | 2% |
| Pharmacology, Toxicology and Pharmaceutical Science | 1 | 2% |
| Other | 4 | 8% |
| Unknown | 13 | 25% |
Attention Score in Context
This research output has an Altmetric Attention Score of 4. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 29 January 2019.
All research outputs
#6,908,521
of 24,119,703 outputs
Outputs from Applied Microbiology and Biotechnology
#2,404
of 8,034 outputs
Outputs of similar age
#92,540
of 361,531 outputs
Outputs of similar age from Applied Microbiology and Biotechnology
#27
of 135 outputs
Altmetric has tracked 24,119,703 research outputs across all sources so far. This one has received more attention than most of these and is in the 70th percentile.
So far Altmetric has tracked 8,034 research outputs from this source. They receive a mean Attention Score of 4.3. This one has gotten more attention than average, scoring higher than 69% of its peers.
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