共查询到19条相似文献,搜索用时 218 毫秒
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细菌素是细菌在核糖体上合成的具有抗菌活性的多肽.许多乳酸菌都能生产细菌素,这些细菌素在同一生境中能杀灭或抑制引起食品腐败的细菌和病原菌的繁殖,可作为天然的食品防腐剂在食品中应用.综述主要描述了乳酸菌细菌素的分类、生物合成及其应用. 相似文献
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乳酸菌细菌素抗菌作用机制研究进展 总被引:1,自引:0,他引:1
《食品科技》2020,(1)
乳酸菌细菌素是由乳酸菌在代谢过程中通过核糖体合成机制产生的一类具有抗菌活性的多肽。已有的研究表明乳酸菌细菌素具有作为食品防腐剂的潜力,目前由乳酸链球菌产生的Nisin已被允许作为食品防腐剂。然而,很多具有良好抗菌活性的细菌素,因抗菌作用机制不明确,限制了其在食品等领域的应用。显微技术、细胞模型制备、荧光探针技术、圆二色谱技术等被用于乳酸菌细菌素抗菌作用机制的研究。乳酸菌细菌素抗菌作用机制包括细胞膜损伤机制和细菌素的胞内作用形式。其中以细胞膜损伤机制为主,这一机制又包括无特异性靶点的"膜穿孔"机制及有特异性靶点(如Lipid Ⅱ和某些膜蛋白)的作用机制。乳酸菌细菌素的胞内作用形式是通过干扰细胞内核酸和蛋白质等物质的正常代谢来发挥抗菌作用。乳酸菌细菌素的抗菌作用机制并不是单一的,一种细菌素可以通过多种不同的作用机制发挥作用,而同一种细菌素对于不同的靶细胞也会有不同的作用机制。探讨细菌素的抗菌作用机制,可为其在多领域的高效应用提供良好的科学依据。 相似文献
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乳酸菌细菌素是一种由乳酸菌在核糖体内合成、具有抑菌活性的多肽或蛋白质。由于乳酸菌通常被认为是安全的微生物,因此由它产生的细菌素受到了广泛地关注。目前由于大部分乳酸菌细菌素抑菌机理研究还不够深入,在一定程度上限制了它的发展和应用。本文对现有乳酸菌细菌素研究成果进行总结,并对细菌素进行了系统分类,阐述了各类乳酸菌细菌素对革兰氏阳性菌的作用机理,最后介绍了乳酸菌细菌素在水产养殖、水产品加工贮藏过程中的应用,旨在为乳酸菌细菌素的应用提供新的探索和基础理论依据。 相似文献
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《Food Reviews International》2013,29(2):299-313
Abstract Numerous strains of lactic acid bacteria used in the fermentation of foods are known to produce bacteriocins. In general, bacteriocins are a group of proteinaceous antimicrobial substances that inhibit the growth of closely related bacteria. However, some bacteriocins produced by lactic acid bacteria (LAB) exhibit a relatively broad antimicrobial spectrum and are active against several food‐spoilage and health‐threatening microorganisms. Many investigators have reported on the use of bacteriocins as food preservative to extend the shelflife of various foods. This review decribes the research that has been conducted on bacteriocinogenic lactic acid bacteria— isolated from a wide variety of foods and in some instances of animal origin—and the characteristics of bacteriocins. Special emphasis is placed on their potentials for use as food preservative and on their physicochemical nature, antibacterial spectrum, and genetic behavior. 相似文献
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In the last decade, a variety of ribosomally synthesized antimicrobial peptides, or bacteriocins, produced by lactic acid bacteria have been identified and characterized. As a result of these studies, insight has been gained into various fundamental aspects of biology and biochemistry such as bacteriocin processing and secretion, mechanisms of cell immunity, and structure-function relationships. In parallel, there has been a growing awareness that bacteriocins may be developed into useful antimicrobial food additives. Class IIa bacteriocins can be considered as the major subgroup of bacteriocins from lactic acid bacteria, not only because of their large number, but also because of their significant biological activities and potential applications. The present review provides an overview of the knowledge available for class IIa bacteriocins and discusses common features and recent findings concerning these substances. The activity and potential food applications of class IIa bacteriocins are a major focus of this review. 相似文献
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Application of bacteriocins in vegetable food biopreservation 总被引:1,自引:1,他引:1
Bacteriocins are generally recognized as "natural" compounds able to influence the safety and quality of foods. In the past years, a lot of works have been aimed to the detection, purification and characterisation of bacteriocins, as well as to their use in food preservation strategies. A list of review articles dealing with the application of bacteriocins to the protection of foods of animal origin is also available in literature, but it lacks for a summary on the utilization of bacteriocins in vegetable foods. These biopreservatives can be used in a number of ways in food systems and this paper mainly focuses on the state-of-the-art application of bacteriocins from lactic acid bacteria (LAB) to promote the microbial stability of both fermented and non-fermented vegetable food products using bacteriocinogenic strains as starter cultures, protective cultures or co-cultures and the employment of pure bacteriocins as food additives. In addition, applications of bacteriocins from non-LAB are also reviewed. The scopes of future directions of research are summarised. 相似文献
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Over the last 2 decades, a variety of bacteriocins, produced by bacteria that kill or inhibit the growth of other bacteria, have been identified and characterized biochemically and genetically. This review article focuses on the ecology of bacteriocins, determination of bacteriocin activity, biosynthesis of bacteriocins, and mode of action. Bacteriocin production and modeling are discussed in the article. Nisin is discussed in some detail in this article since it is currently the only purified bacteriocin approved for food use in the U.S. and has been successfully used for several decades as a food preservative in more than 50 countries. For activity spectra and food applications, the review article focuses primarily on class I and class IIa bacteriocins produced by lactic acid bacteria (LAB) given their development as food preservatives. 相似文献
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细菌素是某些细菌通过核糖体合成机制产生的蛋白质或多肽,能够抑制与其亲源关系相同或相近的微生物,某些细菌素在食品加工和发酵过程中能抑制致病菌和腐败菌。乳酸菌被认为是一般公认安全,其细菌素具有安全性高、稳定性好、抑菌谱广等优点,作为一种新型食品防腐剂备受关注,但商品化的乳酸菌细菌素十分有限,仅限于Nisin和Pediocin PA-1等少数几种,合成量低是细菌素在食品中应用受限的主要原因之一。从不同原料中筛选高产菌株、发酵培养基和发酵条件优化、诱变育种、原生质体融合、基因工程方法、群体感应系统调控六个方面,论述了增加乳酸菌细菌素合成量的方法,以期为实现乳酸菌细菌素的工业化生产提供一定的借鉴。 相似文献
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Leonardo Acu?a Roberto Dionisio Morero Augusto Bellomio 《Food and Bioprocess Technology》2011,4(6):1029-1049
The food industry demands new procedures and methods to produce minimally processed, ready to eat food with intact nutritional,
taste, and flavor properties. The biopreservation and the use of both bacteriocins produced by lactic acid bacteria (LAB)
and bacteriocinogenic strains as an alternative to substitute chemical antimicrobial for food preservation became increasingly
important in the last two decades. When the new proposed natural preservatives techniques are applied, probiotics food can
be obtained and, simultaneously, foodborne pathogens and spoilage contaminants can diminish. However, bacteriocins produced
by LAB have a narrow antibacterial spectrum and are inactive against Gram-negative bacteria like Salmonella and the emergent enterohemorrhagic Escherichia coli. Knowing the mechanism of action and the structural features of microcins synthesized by Gram-negative bacteria and with
potent antimicrobial activity against the mentioned microorganism, the proposal is to obtain hybrid peptides (microcin–bacteriocin)
with broad antimicrobial spectrum. This review explains how the inability of bacteriocins to cross the outer membrane of Gram-negative
bacteria unable them to act on the bacteria. It will also be discussed how a hybrid bacteriocin can be obtained. 相似文献
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Bacteriocins: safe, natural antimicrobials for food preservation. 总被引:39,自引:0,他引:39
J Cleveland T J Montville I F Nes M L Chikindas 《International journal of food microbiology》2001,71(1):1-20
Bacteriocins are antibacterial proteins produced by bacteria that kill or inhibit the growth of other bacteria. Many lactic acid bacteria (LAB) produce a high diversity of different bacteriocins. Though these bacteriocins are produced by LAB found in numerous fermented and non-fermented foods, nisin is currently the only bacteriocin widely used as a food preservative. Many bacteriocins have been characterized biochemically and genetically, and though there is a basic understanding of their structure-function, biosynthesis, and mode of action, many aspects of these compounds are still unknown. This article gives an overview of bacteriocin applications, and differentiates bacteriocins from antibiotics. A comparison of the synthesis. mode of action, resistance and safety of the two types of molecules is covered. Toxicity data exist for only a few bacteriocins, but research and their long-time intentional use strongly suggest that bacteriocins can be safely used. 相似文献
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