| Full text | |
| Author(s): |
Pires Goncalves, Leticia Christina
[1]
;
Da Silva, Sandra Maria
[2]
;
DeRose, Paul C.
[2]
;
Ando, Romulo Augusto
[3]
;
Bastos, Erick Leite
[3]
Total Authors: 5
|
| Affiliation: | [1] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Santo Andre, SP - Brazil
[2] NIST, Biosyst & Biomat Div, Chem Sci Technol Lab, Gaithersburg, MD 20899 - USA
[3] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, Sao Paulo - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | PLoS One; v. 8, n. 9 SEP 3 2013. |
| Web of Science Citations: | 17 |
| Abstract | |
In this proof-of-concept study, we describe the use of the main red beet pigment betanin for the quantification of calcium dipicolinate in bacterial spores, including Bacillus anthracis. In the presence of europium(III) ions, betanin is converted to a water-soluble, non-luminescent orange 1: 1 complex with a stability constant of 1.4x10(5) L mol(-1). The addition of calcium dipicolinate, largely found in bacterial spores, changes the color of the aqueous solution of {[}Eu(Bn)(+)] from orange to magenta. The limit of detection (LOD) of calcium dipicolinate is around 2.0x10(-6) mol L-1 and the LOD determined for both spores, B. cereus and B. anthracis, is (1.1 +/- 0.3)x10(6) spores mL(-1). This simple, green, fast and low cost colorimetric assay was selective for calcium dipicolinate when compared to several analogous compounds. The importance of this work relies on the potential use of betalains, raw natural pigments, as colorimetric sensors for biological applications. (AU) | |
| FAPESP's process: | 11/23036-5 - Floral betalamic pigments: fluorescence and antiradical capacity |
| Grantee: | Erick Leite Bastos |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 07/00684-6 - Synthesis and application of modified flower pigments |
| Grantee: | Erick Leite Bastos |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 07/59407-1 - Semi-synthetic betalains as biocompatible antioxidants and pigments |
| Grantee: | Leticia Christina Pires Gonçalves |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |