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A survey of elastase-producing bacteria and characteristics of the most potent producer, Priestia megaterium gasm32. PLoS One 2023; 18:e0282963. [PMID: 36913358 PMCID: PMC10010523 DOI: 10.1371/journal.pone.0282963] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 02/27/2023] [Indexed: 03/14/2023] Open
Abstract
Ninety-one elastase-producing bacterial isolates were recovered from different localities of the Eastern Province of Saudi Arabia. Elastase from the best isolate Priestia megaterium gasm32, from luncheon samples was purified to electrophoretic homogeneity using DEAE-Sepharose CL-6B and Sephadex G-100 chromatographic techniques. The recovery was 17.7%, the purification fold was 11.7x, and the molecular mass was 30 kDa. Enzymatic activity was highly repressed by Ba2+ and almost completely lost by EDTA, but it was greatly stimulated by Cu2+ ions, suggesting a metalloprotease type. The enzyme was stable at 45°C and pH 6.0-10.0 for 2 hours. Ca2+ ions considerably enhanced the stability of the heat-treated enzyme. The Vmax and Km against the synthetic substrate elastin-Congo red were 6.03 mg/mL, and 8.82 U/mg, respectively. Interestingly, the enzyme showed potent antibacterial activity against many bacterial pathogens. Under SEM, most bacterial cells showed loss of integrity, damage, and perforation. SEM micrographs also showed a time-dependent gradual breakdown of elastin fibers exposed to elastase. After 3 hours, intact elastin fibers disappeared, leaving irregular pieces. Given these good features, this elastase may be a promising candidate for treating damaged skin fibers with the inhibition of contaminating bacteria.
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Martínez-Pérez RB, Rodríguez JA, Cira-Chávez LA, Dendooven L, Viniegra-González G, Estrada-Alvarado I. Exoenzyme-producing halophilic bacteria from the former Lake Texcoco: identification and production of n-butyl oleate and bioactive peptides. Folia Microbiol (Praha) 2020; 65:835-847. [PMID: 32410069 DOI: 10.1007/s12223-020-00794-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 04/27/2020] [Indexed: 10/24/2022]
Abstract
Halophilic bacterias from saline soil from former Lake Texcoco were isolated, identified based on 16 rRNA and tested to produce glucolytic, nucleolytic, proteolytic and lipolytic exoenzymes. The Bacillus, Virgibacillus, Kocuria, Salinicoccus, Gracilibacillus, Halobacillus, Tenuibacillus and Nesterekonia genera where identified. Lipase/eserases and proteases from Nesterenkonia sp. and Nesterenkonia aethiopica showed halotolerant characteristics and were selected to synthesize the oleochemical n-butyl oleate and antioxidant peptides from muscle protein of common carp (Cyprinus carpio), respectively. In organic media (2,2,4-Trimethylpentane), the lipase/esterases from Nesterenkonia sp. (0.6 U/mL) and N. aethiopica (1.2 U/mL) achieved a 62.7% and 53.2% of n-butyl oleate conversion, respectively. The protein hydrolysis from muscle of common carp (C. carpio) showed a degree of hydrolysis of 4.5 ± 0.2% and 2.8 ± 0.1% when proteases from Nesterenkonia sp. and N. aethiopica were used, respectively. Three peptidic fractions ranging molecular masses between 254 and 1002 Da [M + H] show antioxidant scavenging activity, and the principal fraction with a peptide of 547.3 Da [M + H] showed an inhibition of 37.7 ± 1.8% and 16.3 ± 0.6%, when 2,2-diphenyl-1-picrylhydrazyl and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) were used, respectively. These findings showed that the enzymatic battery of the halophilic bacteria from former lake Texcoco can be used in hydrolysis and synthesis of molecules with applications in different fields as food technology or bioenergy.
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Affiliation(s)
- Raúl Balam Martínez-Pérez
- Instituto Tecnológico de Sonora, 5 de febrero 818 sur, Col. Centro, 85000, Ciudad Obregón, SON, Mexico.,Centro de Investigación y Asistencia en Tecnología del Estado de Jalisco, Camino Arenero 1227, El Bajío del Arenal, 45019, Zapopan, JAL, Mexico
| | - Jorge Alberto Rodríguez
- Centro de Investigación y Asistencia en Tecnología del Estado de Jalisco, Camino Arenero 1227, El Bajío del Arenal, 45019, Zapopan, JAL, Mexico
| | - Luis A Cira-Chávez
- Instituto Tecnológico de Sonora, 5 de febrero 818 sur, Col. Centro, 85000, Ciudad Obregón, SON, Mexico
| | - Luc Dendooven
- Centro de Investigación y de Estudios Avanzados del Instituto Politécnico, Av. Instituto Politécnico Nacional 2508 Gustavo A. Madero, San Pedro Zacatenco, 07360, Mexico City, CDMX, Mexico
| | - Gustavo Viniegra-González
- Departamento de Biotecnología, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco N° 186, Col. Vicentina, C.P., 09340, Iztapalapa, CDMX, Mexico
| | - Isabel Estrada-Alvarado
- Instituto Tecnológico de Sonora, 5 de febrero 818 sur, Col. Centro, 85000, Ciudad Obregón, SON, Mexico.
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Aguilar JGDS, Castro RJSD, Sato HH. ALKALINE PROTEASE PRODUCTION BY Bacillus licheniformis LBA 46 IN A BENCH REACTOR: EFFECT OF TEMPERATURE AND AGITATION. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2019. [DOI: 10.1590/0104-6632.20190362s20180014] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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