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Purification and partial characterization of bacillocin 490, a novel bacteriocin produced by a thermophilic strain of Bacillus licheniformis.
Microbial Cell Factories ( IF 6.4 ) Pub Date : 2002-06-22 , DOI: 10.1186/1475-2859-1-1
Luca Martirani 1 , Mario Varcamonti , Gino Naclerio , Maurilio De Felice
Affiliation  

BACKGROUND: Applications of bacteriocins as food preservatives have been so far limited, principally because of their low antimicrobial activity in foods. Nisin is the only bacteriocin of significant use, but applications are restricted principally because of its very low activity at neutral or alkaline pH. Thus the isolation of new bacteriocins active in foods is desirable. RESULTS: We isolated a Bacillus licheniformis thermophilic strain producing a bacteriocin with some novel features, named here bacillocin 490. This bacteriocin was inactivated by pronase E and proteinase K and was active against closely related Bacillus spp. both in aerobic and in anaerobic conditions. Bactericidal activity was kept during storage at 4 degrees C and was remarkably stable in a wide pH range. The bacteriocin was partially purified by elution after adhesion to cells of the food-isolated strain Bacillus smithii and had a rather low mass (2 KDa). Antimicrobial activity against B. smithii was observed also when this organism was grown in water buffalo milk. CONCLUSIONS: Bacillocin 490 is a novel candidate as a food anti-microbial agent since it displays its activity in milk, is stable to heat treatment and during storage, is active in a wide pH range and has bactericidal activity also at high temperature. These features may allow the use of bacillocin 490 during processes performed at high temperature and as a complementary antimicrobial agent of nisin against some Bacillus spp. in non-acidic foods. The small size suggests its use on solid foods.

中文翻译:

地衣芽孢杆菌嗜热菌株产生的新型细菌素杆菌素490的纯化和部分表征。

背景:迄今为止,细菌素作为食品防腐剂的应用受到了限制,主要是因为它们在食品中的抗菌活性较低。乳链菌肽是唯一重要使用的细菌素,但应用受到限制,主要是因为其在中性或碱性pH值下的活性非常低。因此,需要分离出在食品中有活性的新细菌素。结果:我们分离出了一种地衣芽孢杆菌嗜热芽孢杆菌菌株,该菌株产生一种具有某些新特征的细菌素,在这里命名为bacillocin490。该细菌素被链酶E和蛋白酶K灭活,并且对紧密相关的芽孢杆菌属有活性。在有氧和厌氧条件下都可以。在储存过程中,杀菌活性保持在4摄氏度,并且在很宽的pH范围内都非常稳定。在粘附至食物分离菌株史密斯杆菌(Bacillus smithii)的细胞后,通过洗脱将细菌素部分纯化,其质量相当低(2 KDa)。当这种生物在水牛牛奶中生长时,也观察到了对铁匠的抗菌活性。结论:芽孢杆菌素490是一种新型的食品抗菌剂,因为它在牛奶中表现出活性,对热处理稳定,在储存过程中,在宽pH范围内均具有活性,并且在高温下也具有杀菌活性。这些特征可允许在高温下进行过程中使用芽孢杆菌素490,并可作为乳酸链球菌素对某些芽孢杆菌属的补充抗菌剂。在非酸性食品中。体积小,建议将其用于固体食品。当这种生物在水牛牛奶中生长时,也观察到了对铁匠的抗菌活性。结论:芽孢杆菌素490是一种新型的食品抗菌剂,因为它在牛奶中表现出活性,对热处理稳定,在储存过程中,在宽pH范围内均具有活性,并且在高温下也具有杀菌活性。这些特征可允许在高温下进行过程中使用芽孢杆菌素490,并可作为乳酸链球菌素对某些芽孢杆菌属的补充抗菌剂。在非酸性食品中。体积小,建议将其用于固体食品。当这种生物在水牛乳中生长时,也观察到了对铁匠的抗菌活性。结论:芽孢杆菌素490是一种新型的食品抗菌剂,因为它在牛奶中表现出活性,对热处理稳定,在储存过程中,在宽pH范围内均具有活性,并且在高温下也具有杀菌活性。这些特征可允许在高温下进行过程中使用芽孢杆菌素490,并可作为乳酸链球菌素对某些芽孢杆菌属的补充抗菌剂。在非酸性食品中。体积小,建议将其用于固体食品。对热处理稳定,在储存过程中,在很宽的pH范围内都具有活性,并且在高温下也具有杀菌活性。这些特征可以允许在高温下进行过程中使用芽孢杆菌素490,并作为乳酸链球菌素对某些芽孢杆菌属的补充抗菌剂。在非酸性食品中。体积小,建议将其用于固体食品。对热处理稳定,在储存过程中,在很宽的pH范围内都具有活性,并且在高温下也具有杀菌活性。这些特征可允许在高温下进行过程中使用芽孢杆菌素490,并可作为乳酸链球菌素对某些芽孢杆菌属的补充抗菌剂。在非酸性食品中。体积小,建议将其用于固体食品。
更新日期:2019-11-01
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