| Title |
Characterization of the chitinase gene in Bacillus thuringiensis Mexican isolates
|
|---|---|
| Published in |
Folia Microbiologica, March 2013
|
| DOI | 10.1007/s12223-013-0233-y |
| Pubmed ID | |
| Authors |
Ninfa M. Rosas-García, Juan M. Fortuna-González, J. Eleazar Barboza-Corona |
| Abstract |
The chitinase gene was molecularly characterized in five Bacillus thuringiensis Mexican isolates, MR10, MR11, MR21, MR33, and RN52. The proteins derived from these genes were tested for their chitinase activity using fluorogenic chitin derivatives. In order to verify if chitinase genes were functional, they were cloned, and enzymatic activity of recombinant chitinases was also tested. Results indicated that enzymes exhibited endochitinase activity. The highest hydrolytic activity shown against the chitin tetrameric derivative occurred at pH value of 6.5, and the optimum activity temperature was around 60 °C. The recombinant endochitinases showed a molecular mass of ∼77 kDa with isoelectric points from 6.5 to 7.0. Analysis of the nucleotide sequences showed highly conserved sequences among all isolates (97-99 %). Gene sequence analysis revealed a putative promoter (-35 TTGAGA and -10 TTAATA) and a Shine-Dalgarno sequence (5´-AGGAGA-3´) upstream from the open reading frame. The deduced amino acid sequence revealed that the proteins are modular enzymes composed by a family 18 glycosyl hydrolase domain located between amino acids 134 and 549, a fibronectin-binding domain (580 through 656), and a chitin-binding domain (664 through 771). The deduced amino acid sequences of our isolates showed a similarity close to 100 % respect to the sequences reported in the GenBank database. |
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 % |
|---|---|---|
| United States | 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 16 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 16 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Master | 4 | 25% |
| Researcher | 2 | 13% |
| Student > Ph. D. Student | 1 | 6% |
| Student > Doctoral Student | 1 | 6% |
| Professor | 1 | 6% |
| Other | 1 | 6% |
| Unknown | 6 | 38% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 6 | 38% |
| Biochemistry, Genetics and Molecular Biology | 3 | 19% |
| Immunology and Microbiology | 1 | 6% |
| Unknown | 6 | 38% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. 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 03 March 2013.
All research outputs
#15,265,264
of 22,699,621 outputs
Outputs from Folia Microbiologica
#453
of 737 outputs
Outputs of similar age
#121,939
of 193,968 outputs
Outputs of similar age from Folia Microbiologica
#3
of 5 outputs
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