Degradation of Multiple Peptides by Microcystin-Degrader <i>Paucibacter toxinivorans</i> (2C20)
Since conventional drinking water treatments applied in different countries are inefficient at eliminating potentially toxic cyanobacterial peptides, a number of bacteria have been studied as an alternative to biological filters for the removal of microcystins (MCs). Here, we evaluated the degradati...
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doaj-6a70909c3dbd4a7ba4d84508a15bfb482021-04-08T23:01:12ZengMDPI AGToxins2072-66512021-04-011326526510.3390/toxins13040265Degradation of Multiple Peptides by Microcystin-Degrader <i>Paucibacter toxinivorans</i> (2C20)Allan A. Santos0Sylvia Soldatou1Valeria Freitas de Magalhães2Sandra M. F. O. Azevedo3Dolores Camacho-Muñoz4Linda A. Lawton5Christine Edwards6Biophysics Institute, Federal University of Rio de Janeiro, 373 Avenida Carlos Chagas Filho, Ilha do Fundão, Rio de Janeiro 21941-901, BrazilSchool of Pharmacy and Life Sciences, Robert Gordon University, The Sir Ian Wood Building, Garthdee Road, Aberdeen AB10 7GJ, UKBiophysics Institute, Federal University of Rio de Janeiro, 373 Avenida Carlos Chagas Filho, Ilha do Fundão, Rio de Janeiro 21941-901, BrazilBiophysics Institute, Federal University of Rio de Janeiro, 373 Avenida Carlos Chagas Filho, Ilha do Fundão, Rio de Janeiro 21941-901, BrazilSchool of Pharmacy and Life Sciences, Robert Gordon University, The Sir Ian Wood Building, Garthdee Road, Aberdeen AB10 7GJ, UKSchool of Pharmacy and Life Sciences, Robert Gordon University, The Sir Ian Wood Building, Garthdee Road, Aberdeen AB10 7GJ, UKSchool of Pharmacy and Life Sciences, Robert Gordon University, The Sir Ian Wood Building, Garthdee Road, Aberdeen AB10 7GJ, UKSince conventional drinking water treatments applied in different countries are inefficient at eliminating potentially toxic cyanobacterial peptides, a number of bacteria have been studied as an alternative to biological filters for the removal of microcystins (MCs). Here, we evaluated the degradation of not only MCs variants (-LR/DM-LR/-RR/-LF/-YR), but also non-MCs peptides (anabaenopeptins A/B, aerucyclamides A/D) by <i>Paucibacter</i><i>toxinivorans</i> over 7 days. We also evaluated the degradation rate of MC-LR in a peptide mix, with all peptides tested, and in the presence of <i>M. aeruginosa</i> crude extract. Furthermore, biodegradation was assessed for non-cyanobacterial peptides with different chemical structures, such as cyclosporin A, (Glu1)-fibrinopeptide-B, leucine-enkephalin, and oxytocin. When cyanopeptides were individually added, <i>P. toxinivorans</i> degraded them (99%) over 7 days, except for MC-LR and -RR, which decreased by about 85 and 90%, respectively. The degradation rate of MC-LR decreased in the peptide mix compared to an individual compound, however, in the presence of the <i>Microcystis</i> extract, it was degraded considerably faster (3 days). It was noted that biodegradation rates decreased in the mix for all MCs while non-MCs peptides were immediately degraded. UPLC–QTOF–MS/MS allowed us to identify two linear biodegradation products for MC-LR and MC-YR, and one for MC-LF. Furthermore, <i>P. toxinivorans</i> demonstrated complete degradation of non-cyanobacterial peptides, with the exception of oxytocin, where around 50% remained after 7 days. Thus, although <i>P. toxinivorans</i> was previously identified as a MC-degrader, it also degrades a wide range of peptides under a range of conditions, which could be optimized as a potential biological tool for water treatment.https://www.mdpi.com/2072-6651/13/4/265cyanopeptidesmicrocystinanabaenopeptinaerucyclamidebacterial degradation rateUPLC-MS |
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DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Allan A. Santos Sylvia Soldatou Valeria Freitas de Magalhães Sandra M. F. O. Azevedo Dolores Camacho-Muñoz Linda A. Lawton Christine Edwards |
spellingShingle |
Allan A. Santos Sylvia Soldatou Valeria Freitas de Magalhães Sandra M. F. O. Azevedo Dolores Camacho-Muñoz Linda A. Lawton Christine Edwards Degradation of Multiple Peptides by Microcystin-Degrader <i>Paucibacter toxinivorans</i> (2C20) Toxins cyanopeptides microcystin anabaenopeptin aerucyclamide bacterial degradation rate UPLC-MS |
author_facet |
Allan A. Santos Sylvia Soldatou Valeria Freitas de Magalhães Sandra M. F. O. Azevedo Dolores Camacho-Muñoz Linda A. Lawton Christine Edwards |
author_sort |
Allan A. Santos |
title |
Degradation of Multiple Peptides by Microcystin-Degrader <i>Paucibacter toxinivorans</i> (2C20) |
title_short |
Degradation of Multiple Peptides by Microcystin-Degrader <i>Paucibacter toxinivorans</i> (2C20) |
title_full |
Degradation of Multiple Peptides by Microcystin-Degrader <i>Paucibacter toxinivorans</i> (2C20) |
title_fullStr |
Degradation of Multiple Peptides by Microcystin-Degrader <i>Paucibacter toxinivorans</i> (2C20) |
title_full_unstemmed |
Degradation of Multiple Peptides by Microcystin-Degrader <i>Paucibacter toxinivorans</i> (2C20) |
title_sort |
degradation of multiple peptides by microcystin-degrader <i>paucibacter toxinivorans</i> (2c20) |
publisher |
MDPI AG |
series |
Toxins |
issn |
2072-6651 |
publishDate |
2021-04-01 |
description |
Since conventional drinking water treatments applied in different countries are inefficient at eliminating potentially toxic cyanobacterial peptides, a number of bacteria have been studied as an alternative to biological filters for the removal of microcystins (MCs). Here, we evaluated the degradation of not only MCs variants (-LR/DM-LR/-RR/-LF/-YR), but also non-MCs peptides (anabaenopeptins A/B, aerucyclamides A/D) by <i>Paucibacter</i><i>toxinivorans</i> over 7 days. We also evaluated the degradation rate of MC-LR in a peptide mix, with all peptides tested, and in the presence of <i>M. aeruginosa</i> crude extract. Furthermore, biodegradation was assessed for non-cyanobacterial peptides with different chemical structures, such as cyclosporin A, (Glu1)-fibrinopeptide-B, leucine-enkephalin, and oxytocin. When cyanopeptides were individually added, <i>P. toxinivorans</i> degraded them (99%) over 7 days, except for MC-LR and -RR, which decreased by about 85 and 90%, respectively. The degradation rate of MC-LR decreased in the peptide mix compared to an individual compound, however, in the presence of the <i>Microcystis</i> extract, it was degraded considerably faster (3 days). It was noted that biodegradation rates decreased in the mix for all MCs while non-MCs peptides were immediately degraded. UPLC–QTOF–MS/MS allowed us to identify two linear biodegradation products for MC-LR and MC-YR, and one for MC-LF. Furthermore, <i>P. toxinivorans</i> demonstrated complete degradation of non-cyanobacterial peptides, with the exception of oxytocin, where around 50% remained after 7 days. Thus, although <i>P. toxinivorans</i> was previously identified as a MC-degrader, it also degrades a wide range of peptides under a range of conditions, which could be optimized as a potential biological tool for water treatment. |
topic |
cyanopeptides microcystin anabaenopeptin aerucyclamide bacterial degradation rate UPLC-MS |
url |
https://www.mdpi.com/2072-6651/13/4/265 |
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