A Short Review of Multifunctional Roles of Bacteriocins

Abdul Wahab¹, Alina binti Abdul Rahim², Muhammad Abdullah Qadri³

¹Institute of Home and Food Sciences, Faculty of Life Sciences

²Faculty of Science and Technology, University Sains Islam Malaysia, 71800, Malaysia

³Depatment of Botany, Faculty of Life Sciences, University of the Punjab, Lahore, 54000, Pakistan

METADATA Paper history Received: 01 May 2025 Revised: 12 April 2025 Accepted: 30 April 2025 Published: 20 May 2025 Corresponding author Email: abdul.wahab14670@gmail.com (Abdul Wahab) Keywords Bacteriocins Innovative Industrial Perspective Multidimensional Citation Wahab A, Rahim AbA, Qadir MA (2025) A short review on multifunctional roles of bacteriocins. Innovations in STEAM: Research & Education 3: 25030101. https://doi.org/10.63793/ISRE/0021

ABSTRACT Background: Rising demand for healthy food products has created the need for more innovative food preservation methods. One such method involves the use of bacteriocins, which are natural antimicrobial peptides with potential application in the food industry. Objective: The purpose of this review is to highlight the purification processes of bacteriocins and discuss their multidimensional roles, particularly in controlling harmful pathogens. Methodology: Information was compiled from relevant scientific literature focusing on the purification methods, properties, and applications of bacteriocins. Emphasis was given to their potential mechanisms of action against foodborne pathogens and their prospective role in food preservation. Results: Current findings indicate that bacteriocins exhibit promising antimicrobial activity against a wide range of harmful microorganisms and enhance meat shelf-life, improve plant growth, and control skin-related diseases. However, further industrial-scale studies are still needed to fully validate their commercial applications. Conclusion: Bacteriocins hold significant potential as innovative tools for food preservation and can potentially improve meat shelf-life, enhance plant growth, and control skin-related disease infestation. Their purification and demonstrated antimicrobial roles provide a foundation for future research aimed at integrating them into industrial applications for safer and healthier food production.

INTRODUCTION

Foodborne diseases remain one of the biggest threats to the food industry, and when outbreaks occur, they cause significant losses to a country, as a large portion of the national budget is spent on managing such disasters. To address this, the food industry has upgraded its safety systems to ensure consumer protection. This continuous improvement has also created healthy competition among food industries, driving technological advancements. Nature has blessed us with a wide variety of foods, and food lovers always expect these to be nutritious, wholesome, and safe for consumption. According to Obafemi et al. (2025), microbial spoilage is a major factor affecting food quality and safety. When microbes enter food products, they can cause discoloration, destroy flavour compounds, and lead to food toxicity. This not only damages public perception but may also contribute to food scarcity. Preservation is therefore essential to control spoilage-causing pathogens. Bacteriocins, the native antimicrobial peptides of bacteria, are becoming increasingly important tools in contemporary food protection. They inhibit pathogenic and spoilage bacteria quite effectively, providing a biological alternative to conventional preservatives (Le et al. 2016; Obafemi et al. 2025).

In the quest for safe, natural, and effective antimicrobial agents, bacteriocins have become a cornerstone of modern biotechnology. These ribosomally synthesized peptides, which are secreted by various strains of bacteria, have strong inhibitory action against other microorganisms, such as foodborne pathogens and spoilage bacteria. Their use includes antimicrobial function to preserve foods, promote animal health, and treat diseases (Ali et al. 2020). Food technologists and scientists have increasingly turned to biopreservatives, among which bacteriocins produced through biotechnology are of particular interest. Bacteriocins show promising antimicrobial effects against food spoilage organisms and are widely considered natural food biopreservatives (Mahindra et al. 2015). Bacteriocins play a vital role in overcoming food safety issues, lowering the dependence on chemical preservatives, and minimizing threats of foodborne illness. In the food sector, they provide a reliable solution for shelf-life extension and product safety. Outside of the food sector, they are investigated for their therapeutic applications, such as fighting antibiotic-resistant infections and influencing the gut microbiome (Gu 2023). This review highlights bacteriocins, their classifications, and their importance in the meat sector, plant growth, and skin care products.

BACTERIOCINS

The extensive use of conventional medicines in the treatment of human and animal diseases has become a concern in recent years (Roy 1997; Yoneyama and Katsumata 2006). The emergence of resistant strains has complicated the treatment of many diseases, making the development of new antimicrobial agents an important goal (Kumar and Schweiser 2005; Fisher et al. 2005). Bacteriocins have gained attention as alternatives to antibiotics because they are non-toxic, active at nanomolar concentrations, and produced naturally by lactic acid bacteria (Parada et al. 2007). They are proteinaceous compounds with antimicrobial activity, produced by bacteria to inhibit or kill other bacterial strains (Parada et al. 2007). Although they are bacterial products, they are not classified as antibiotics to avoid confusion with therapeutic drugs (Deraz et al. 2005). For the food industry, bacteriocin production is highly beneficial, as it helps inhibit and eliminate pathogens. Many bacteriocins are effective against closely related bacteria, often displaying a narrow host range (Deegan et al. 2006). It is used predominantly in canned foods and dairy products and is especially effective when utilized in the production of processed cheese and cheese spreads, where it protects against heat-resistant spore-forming organisms such as those belonging to the genera Bacillus and Clostridium (Tarelli et al. 1994).

CLASSES OF BACTERIOCINS

Bacteriocins are broadly divided into four main classes. Class I includes lantibiotics, which are small peptides of less than 5 kDa in size and are heat-stable. They act mainly by disrupting bacterial membranes, and nisin is the most well-known example (Broadbent et al. 1989). Within this class, subclass-Ia- Ia consists of positively charged, elongated, and flexible peptides, while subclass-Ib includes peptides that are more rigid, globular in shape, and either uncharged or negatively charged (Parada et al. 2007). Class II bacteriocins, often referred to as non-lantibiotics, are heat-stable peptides composed of amino acids and show variability in molecular weight. This class is further divided into three groups: Class-IIa, which contains peptides active against Listeria species and is represented by pediocin PA-1; Class-IIb, which includes bacteriocins that require two different peptides to achieve antimicrobial activity; and Class-IIc, which is characterized by small, heat-stable peptides transported by leader sequences (Venema et al. 1997; Holo et al. 2002; Mauriello et al. 1999; Parada et al. 2007). Class-III bacteriocins are larger in size, with molecular weights exceeding 30 kDa, while Class-IV bacteriocins are complex molecules containing carbohydrate or lipid moieties in addition to protein components (Parada et al. 2007; Holo et al. 2002; Mauriello et al. 1999).

EFFECT OF PURIFICATION METHODS, pH AND TEMPERATURE ON BACTERIOCIN PRODUCTION

Different purification methods have been developed depending on the class of bacteriocin (Table 1). These include protein precipitation, chromatography, and electrophoretic techniques, which allow isolation and characterization of bacteriocins for food and pharmaceutical applications. The production and activity of bacteriocins vary with environmental conditions. Studies have shown that each bacterial strain has an optimum pH range and temperature at which bacteriocin production is maximized (Table 2 and 3).

BENEFITS OF BACTERIOCINS

The application of bacteriocins in the food industry is valuable for extending shelf life and protecting against harmful pathogens. Their use reduces the risk of disease transmission and economic losses associated with food spoilage. Growing consumer demand for natural, minimally processed foods further supports the role of bacteriocins as natural antimicrobial agents (Soltani et al. 2021). When tested individually or in combination, bacteriocins show promising results against foodborne pathogens (Rendueles et al. 2022). In the dairy and poultry sectors, they have been applied successfully to control Clostridium spp. (Arqués et al. 2015; Le et al. 2016). However, bacteriocins that are applied commercially as biopreservatives must fulfill specific requirements (Holo et al. 2002; Mauriello et al. 1999), such as being non-toxic, accepted by recognized authorities, remaining sufficiently stable during storage, and not negatively affecting the quality of the product to which they are applied.

APPLICATIONS OF BACTERIOCINS

Metal industry

Several bacteriocins have been applied in the meat sector to control pathogens, thereby improving food safety and

Table 1: Purification of bacteriocins according to their classes

Class	Purification Method	Procedure	Result	Reference
Class I Bacteriocins	Expanded bed ion exchange chromatography	Through processing of the Lactococcus lactis subsp diluted culture broth of A164 obtained, and further, this broth was processed by using this method	31-fold purification was achieved with a yield of 90%	Cheigh et al. 2004
	Ion exchange, Hydrophobic Interaction	20% of ammonium sulphate was used with the precipitate of the cell-free supernatant	Through the use of Lactobacillus sake L45, its strain Lactocin S, a 3,7 kDa bacteriocin, was created and then refined to uniformity	Mørtvedt et al. 1991
	Combinations of different chromatographic methods	Hydrophobic and Cation exchange principles were applied during the use of these methods	Purification of Acidocin CH5 manufactured by using L. acidophilus in lab	Chumchalova et al. 2004
Class II Bacteriocins	Ethanol precipitation	In the first step, ampholytes, Tween 20, and glycine were mixed, followed by ultrafiltration to achieve a pure sample. Lastly, the sample was moved to tricine SDS-PAGE	Pediococcus acidilactici was used to produce purified pediocin PA-1, with a yield between 30 and 40%	Venema etal. 2004
	Saturation with ammonium sulfate (35%)	In an FPLC system, purification includes Gel filtration chromatography, and then is moved to methanol-chloroform extraction, followed by three methods. Firstly by ion-exchange, then by hydrophobic interaction, and lastly through reverse-phase chromatography	Lactobin A, produced by L. amylovorus, was purified	Contreras et al. 1997
	ion-exchange chromatography, ultrafiltration, and successive gel filtrations	One of these methods can be used in the presence of two experimental consituents, 8 M urea followed by sodium dodecyl sulfate 0,1% sodium dodecyl sulfate	Lactacin B produced from L. acidophilus was purified	Barefoot et al. 1984
Class III Bacteriocins	Ammonium sulfate precipitation	In sodium acetate buffer, the pellet was placed and then dialysed against sodium acetate buffer.	Lactobacillus helveticus 481 produced Helveticin J, a peptide was purified	Joerger and Klaenhammer 1986

Table 2: Effect of pH on bacteriocin

Bacteriocin producing strain	Optimum pH	Reference
Leuconostoc MF215B	pH 6.0	Blom et al. 1999
L. gelidin	pH 6.5	Stiles and Hasting 1991
amylovorin L471	pH 6.5	Callewaert et al. 1999)
C. piscicola	7.0	Herbin et al. 1997

Table 3: Effect of temperature on bacteriocin

Bacteriocin /Strain	Suitable Temperature for Bacteriocin Production	Observation	Reference
Strain D53	10°C to 37°C	--------	Uhlman et al. 1992
Brevibacterium linens	25°C	No growth found at 37°C	Diep et al. 2000 Diep et al. 2000
L. sake	25–30°C	At 33.5°C decline in production occurs, and zero production is observed at 34.5°C
L. plantarumY21	30°C	At 37°C, especially in milk products, bacteriocin was produced during incubation	Tarelli et al. 1994

extending shelf life. Classes of meat-preservation bacteriocins are present in Table 4. Partially purified or purified bacteriocins may be applied as a food additive and for active packaging. Moreover, bacteriocin-producing cells may be incorporated as starter or protective cultures for meat fermentation.

Veterinary use

Nisin has been investigated for the prevention of bovine mastitis caused by Staphylococcus aureus and Streptococcus agalactiae. Injectable formulations containing nisin have shown up to 99.9% effectiveness in controlling these

Table 4: Role of different bacteriocins against different pathogens in meat sector

Type of meat	Meat product	Strains of bacteriocin	Action against pathogens	Other changes	References
Meat Salami	Ostrich meat salami	Lactobacillus curvatus DF126	Anti-Listeria activity	-----	Dicks et al. 2004
	Salami from ostrich, beef, mutton	Lactobacillus plantarum 423		----	Dicks et al. 2004; Todorov et al. 2007
		Lactobacillus curvatus DF38		----	Todorov et al. 2007
Fermented Meat	Fermented pork sausage	Pediococcus pentosaceus BCC 3772	Anti-Listeria activity	No changes in sensory properties, as well as in consumer acceptability of the product	Kingcha et al. 2012
	Fermented pork sausage	Lactobacillus sakei C2	nti-Listeria and Anti-Enterobacteriacae activity,	Both the ratio of malondialdehyde and The nitrite content in the product was reduced	Gao et al. 2014
Raw Meat	Raw beef	Lactobacillus curvatus CWBI-B28	Anti-Listeria activity	--------	Dortu et al. 2008
Packed Meat	Vacuum-packed fresh beef	Lactobacillus curvatus CRL705	Anti-Listeria activity	-------	Castellano et al. 2010; Castellano and Vignolo et al. 2006

pathogens. If these pathogens are not controlled, they cause significant economic losses in the livestock industry (Perez et al. 2014; Le et al. 2016).

Skincare

Scientific evidence suggests that certain probiotics help maintain the skin’s lipid barrier and microflora, supporting skin immunity and homeostasis (Munir et al. 2025). In one study, a lotion containing ESL5, a bacteriocin from Enterococcus faecalis SL-5, significantly reduced pimples and inflammatory acne lesions caused by Propionibacterium acnes (Kang et al. 2009), suggesting their potential role in skin care products.

Plant growth promotion

Bacteriocins such as thuricin 17, bacthuricin F4, and bacteriocin C85 have been shown to enhance plant growth. When applied with their producing bacteria on tomato, soybean, and corn, they improved leaf area, increased photosynthesis rates by up to 6%, and raised plant dry weight by 15%. Additionally, root nodulation increased by 21% compared to control plants (Smith et al. 2008).

CONCLUSIONS

In the 21^st century, the preparation of various food products requires knowledge and integration of multiple scientific fields, with the primary objective of ensuring food safety. Bacteriocins are associated with the control of harmful pathogens in the food and pharmaceutical industries, although further research is needed to fully understand their hidden roles in food safety. At present, consumers are paying greater attention to food safety, and to address their concerns, so industries are developing strong research-based models that ensure food safety. However, more research is needed to explore the use of bacteriocins in food and other industries.

AUTHOR CONTRIBUTIONS

Conceptualization and data collection were carried out by AW; manuscript drafting was performed by AbAR; review and editing were undertaken by MAQ. All authors read and approved the final version of the manuscript.

CONFLICT OF INTEREST

The authors affirm that they possess no conflicts of interest.

DATA AVAILABILITY

The data will be made available on a fair request to the corresponding author

ETHICS APPROVAL

Not applicable to this paper

FUNDING SOURCE

This project is not funded by any agency.

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