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Ren K, Wang Q, Chen J, Zhang H, Guo Z, Xu M, Rao Z, Zhang X. Design-build-test of recombinant Bacillus subtilis chassis cell by lifespan engineering for robust bioprocesses. Synth Syst Biotechnol 2024; 9:470-480. [PMID: 38634000 PMCID: PMC11021899 DOI: 10.1016/j.synbio.2024.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 03/03/2024] [Accepted: 04/07/2024] [Indexed: 04/19/2024] Open
Abstract
Microbial cell factories utilize renewable raw materials for industrial chemical production, providing a promising path for sustainable development. Bacillus subtilis is widely used in industry for its food safety properties, but challenges remain in the limitations of microbial fermentation. This study proposes a novel strategy based on lifespan engineering to design robust B. subtilis chassis cells to supplement traditional metabolic modification strategies that can alleviate cell autolysis, tolerate toxic substrates, and get a higher mass transfer efficiency. The modified chassis cells could produce high levels of l-glutaminase, and tolerate hydroquinone to produce α-arbutin efficiently. In a 5 L bioreactor, the l-glutaminase enzyme activity of the final strain CRE15TG was increased to 2817.4 ± 21.7 U mL-1, about 1.98-fold compared with that of the wild type. The α-arbutin yield of strain CRE15A was increased to 134.7 g L-1, about 1.34-fold compared with that of the WT. To our knowledge, both of the products in this study performed the highest yields reported so far. The chassis modification strategy described in this study can Improve the utilization efficiency of chassis cells, mitigate the possible adverse effects caused by excessive metabolic modification of engineered strains, and provide a new idea for the future design of microbial cell factories.
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Affiliation(s)
- Kexin Ren
- Key Laboratory of Industrial Biotechnology of the Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
- Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, 214200, China
| | - Qiang Wang
- Key Laboratory of Industrial Biotechnology of the Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
- Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, 214200, China
| | - Jianghua Chen
- Key Laboratory of Industrial Biotechnology of the Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Hengwei Zhang
- Key Laboratory of Industrial Biotechnology of the Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
- Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, 214200, China
| | - Zhoule Guo
- Key Laboratory of Industrial Biotechnology of the Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Meijuan Xu
- Key Laboratory of Industrial Biotechnology of the Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
- Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, 214200, China
| | - Zhiming Rao
- Key Laboratory of Industrial Biotechnology of the Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
- Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, 214200, China
| | - Xian Zhang
- Key Laboratory of Industrial Biotechnology of the Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
- Yixing Institute of Food and Biotechnology Co., Ltd, Yixing, 214200, China
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Lei V, Petty AJ, Atwater AR, Wolfe SA, MacLeod AS. Skin Viral Infections: Host Antiviral Innate Immunity and Viral Immune Evasion. Front Immunol 2020; 11:593901. [PMID: 33240281 PMCID: PMC7677409 DOI: 10.3389/fimmu.2020.593901] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 10/06/2020] [Indexed: 12/16/2022] Open
Abstract
The skin is an active immune organ that functions as the first and largest site of defense to the outside environment. Serving as the primary interface between host and pathogen, the skin’s early immune responses to viral invaders often determine the course and severity of infection. We review the current literature pertaining to the mechanisms of cutaneous viral invasion for classical skin-tropic, oncogenic, and vector-borne skin viruses. We discuss the skin’s evolved mechanisms for innate immune viral defense against these invading pathogens, as well as unique strategies utilized by the viruses to escape immune detection. We additionally explore the roles that demographic and environmental factors, such as age, biological sex, and the cutaneous microbiome, play in altering the host immune response to viral threats.
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Affiliation(s)
- Vivian Lei
- Department of Dermatology, Duke University, Durham, NC, United States.,School of Medicine, Duke University, Durham, NC, United States
| | - Amy J Petty
- School of Medicine, Duke University, Durham, NC, United States
| | - Amber R Atwater
- Department of Dermatology, Duke University, Durham, NC, United States
| | - Sarah A Wolfe
- Department of Dermatology, Duke University, Durham, NC, United States
| | - Amanda S MacLeod
- Department of Dermatology, Duke University, Durham, NC, United States.,Department of Immunology, Duke University, Durham, NC, United States.,Pinnell Center for Investigative Dermatology, Duke University, Durham, NC, United States.,Department of Molecular Genetics and Microbiology, Duke University, Durham, NC, United States
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Chen J, Harstad OM, McAllister T, Dörsch P, Holo H. Propionic acid bacteria enhance ruminal feed degradation and reduce methane production in vitro. ACTA AGR SCAND A-AN 2020. [DOI: 10.1080/09064702.2020.1737215] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Jikun Chen
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway
- Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences, Ås, Norway
| | - Odd Magne Harstad
- Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences, Ås, Norway
| | - Tim McAllister
- Agriculture and Agri-Food Canada, Lethbridge Research Centre, Lethbridge, Canada
| | - Peter Dörsch
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway
- Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås, Norway
| | - Helge Holo
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway
- Tine SA, Oslo, Norway
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Cutibacterium acnes Type II strains are associated with acne in Chinese patients. Antonie van Leeuwenhoek 2019; 113:377-388. [PMID: 31630297 DOI: 10.1007/s10482-019-01344-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 10/04/2019] [Indexed: 01/09/2023]
Abstract
Acne is a common inflammatory skin disease, especially in adolescents. Certain Cutibacterium acnes subtypes are associated with acne, although more than one subtype of C. acnes strains may simultaneously reside on the surface of the skin of an individual. To better understand the relationship between the genomic characteristics of C. acnes subtypes and acnes, we collected 50 C. acnes strains from the facial skin of 10 people (5 healthy individuals, 5 patients with acne) in Liaoning, China and performed whole genome sequencing of all strains. We demonstrated that the six potential pathogenic C. acnes strains were all Type II subtype, and discovered 90 unique genes of the six strains related to acne using pan-genome analysis. The distribution of 2 of the 90 genes was identified by PCR in bacterial cultures collected from the facial skin of 171 individuals (55 healthy individuals, 52 patients with mild acne and 64 patients with moderate to severe acne). Both the genes were significantly associated with acne (Chi square test, P < 0.01). We conclude that Type II strains are associated with acne in Chinese patients.
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Razmyar J, Peighambari SM, Zamani AH. Detection of a Newly Described Bacteriocin, Perfrin, Among Clostridium perfringens Isolates from Healthy and Diseased Ostriches and Broiler Chickens in Iran. Avian Dis 2018; 61:387-390. [PMID: 28957009 DOI: 10.1637/11580-010517-resnoter] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Necrotic enteritis due to Clostridium perfringens strains harboring the netB gene is a well-known disorder in poultry. The aim of this study was to investigate the association of a novel bacteriocin, perfrin, with netB among isolates from healthy and diseased ostriches and broiler chickens. Forty-six C. perfringens isolates from broiler chickens and ostriches collected from 2010 to 2014 were included in this study and subjected to PCR to detect netB and perfrin genes. Six (60%) and 9 (25%) isolates were positive for both netB and perfrin genes in broilers and ostriches, respectively. Statistical analysis found a significant difference between healthy and diseased flocks for perfrin both in broilers and ostriches. For netB, the significant difference was only found between healthy and diseased ostrich flocks. This is the first report of the presence of perfrin in netB-positive C. perfringens strains in ostriches.
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Affiliation(s)
- Jamshid Razmyar
- A Department of Clinical Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran 9177948974
| | - Seyed Mostafa Peighambari
- B Department of Avian Diseases, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran 9177948974
| | - Amir Hossein Zamani
- A Department of Clinical Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran 9177948974
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Piwowarek K, Lipińska E, Hać-Szymańczuk E, Kieliszek M, Ścibisz I. Propionibacterium spp.-source of propionic acid, vitamin B12, and other metabolites important for the industry. Appl Microbiol Biotechnol 2018; 102:515-538. [PMID: 29167919 PMCID: PMC5756557 DOI: 10.1007/s00253-017-8616-7] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 10/31/2017] [Accepted: 11/01/2017] [Indexed: 01/09/2023]
Abstract
Bacteria from the Propionibacterium genus consists of two principal groups: cutaneous and classical. Cutaneous Propionibacterium are considered primary pathogens to humans, whereas classical Propionibacterium are widely used in the food and pharmaceutical industries. Bacteria from the Propionibacterium genus are capable of synthesizing numerous valuable compounds with a wide industrial usage. Biomass of the bacteria from the Propionibacterium genus constitutes sources of vitamins from the B group, including B12, trehalose, and numerous bacteriocins. These bacteria are also capable of synthesizing organic acids such as propionic acid and acetic acid. Because of GRAS status and their health-promoting characteristics, bacteria from the Propionibacterium genus and their metabolites (propionic acid, vitamin B12, and trehalose) are commonly used in the cosmetic, pharmaceutical, food, and other industries. They are also used as additives in fodders for livestock. In this review, we present the major species of Propionibacterium and their properties and provide an overview of their functions and applications. This review also presents current literature concerned with the possibilities of using Propionibacterium spp. to obtain valuable metabolites. It also presents the biosynthetic pathways as well as the impact of the genetic and environmental factors on the efficiency of their production.
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Affiliation(s)
- Kamil Piwowarek
- Department of Biotechnology, Microbiology and Food Evaluation, Division of Food Biotechnology and Microbiology, Faculty of Food Sciences, Warsaw University of Life Sciences SGGW (WULS-SGGW), Nowoursynowska 159c Street, 02-776, Warsaw, Poland.
| | - Edyta Lipińska
- Department of Biotechnology, Microbiology and Food Evaluation, Division of Food Biotechnology and Microbiology, Faculty of Food Sciences, Warsaw University of Life Sciences SGGW (WULS-SGGW), Nowoursynowska 159c Street, 02-776, Warsaw, Poland
| | - Elżbieta Hać-Szymańczuk
- Department of Biotechnology, Microbiology and Food Evaluation, Division of Food Biotechnology and Microbiology, Faculty of Food Sciences, Warsaw University of Life Sciences SGGW (WULS-SGGW), Nowoursynowska 159c Street, 02-776, Warsaw, Poland
| | - Marek Kieliszek
- Department of Biotechnology, Microbiology and Food Evaluation, Division of Food Biotechnology and Microbiology, Faculty of Food Sciences, Warsaw University of Life Sciences SGGW (WULS-SGGW), Nowoursynowska 159c Street, 02-776, Warsaw, Poland
| | - Iwona Ścibisz
- Department of Food Technology, Division of Fruit and Vegetable Technology, Faculty of Food Sciences, Warsaw University of Life Sciences (WULS-SGGW), Nowoursynowska 159c Street, 02-776, Warsaw, Poland
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Barnard E, Li H. Shaping of cutaneous function by encounters with commensals. J Physiol 2017; 595:437-450. [PMID: 26988937 PMCID: PMC5233660 DOI: 10.1113/jp271638] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Accepted: 01/05/2016] [Indexed: 01/17/2023] Open
Abstract
The skin is the largest organ in the human body and provides the first line of defence against environmental attack and pathogen invasion. It harbor multiple commensal microbial communities at different body sites, which play important roles in sensing the environment, protecting against colonization and infection of pathogens, and guiding the host immune system in response to foreign invasions. The skin microbiome is largely variable between individuals and body sites, with several core commensal members commonly shared among individuals at the healthy state. These microbial commensals are essential to skin health and can potentially lead to disease when their abundances and activities change due to alterations in the environment or in the host. While recent advances in sequencing technologies have enabled a large number of studies to characterize the taxonomic composition of the skin microbiome at various body sites and under different physiological conditions, we have limited understanding of the microbiome composition and dynamics at the strain level, which is highly important to many microbe-related diseases. Functional studies of the skin microbial communities and the interactions among community members and with the host are currently scant, warranting future investigations. In this review, we summarize the recent findings on the skin microbiome, highlighting the roles of the major commensals, including bacteria, fungi and bacteriophages, in modulating skin functions in health and disease. Functional studies of the skin microbiota at the metatranscriptomic and proteomic levels are also included to illustrate the interactions between the microbiota and the host skin.
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Affiliation(s)
- Emma Barnard
- Department of Molecular and Medical Pharmacology, Crump Institute for Molecular Imaging, David Geffen School of MedicineUCLACAUSA
| | - Huiying Li
- Department of Molecular and Medical Pharmacology, Crump Institute for Molecular Imaging, David Geffen School of MedicineUCLACAUSA
- UCLA‐DOE Institute for Genomics and ProteomicsLos AngelesCAUSA
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Strain-to-strain differences within lactic and propionic acid bacteria species strongly impact the properties of cheese–A review. ACTA ACUST UNITED AC 2015. [DOI: 10.1007/s13594-015-0267-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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9
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Engineering propionibacteria as versatile cell factories for the production of industrially important chemicals: advances, challenges, and prospects. Appl Microbiol Biotechnol 2014; 99:585-600. [PMID: 25431012 DOI: 10.1007/s00253-014-6228-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 11/11/2014] [Accepted: 11/16/2014] [Indexed: 10/24/2022]
Abstract
Propionibacteria are actinobacteria consisting of two principal groups: cutaneous and dairy. Cutaneous propionibacteria are considered primary pathogens to humans, whereas dairy propionibacteria are widely used in the food and pharmaceutical industries. Increasing attention has been focused on improving the performance of dairy propionibacteria for the production of industrially important chemicals, and significant advances have been made through strain engineering and process optimization in the production of flavor compounds, nutraceuticals, and antimicrobial compounds. In addition, genome sequencing of several propionibacteria species has been completed, deepening understanding of the metabolic and physiological features of these organisms. However, the metabolic engineering of propionibacteria still faces several challenges owing to the lack of efficient genome manipulation tools and the existence of various types of strong restriction-modification systems. The emergence of systems and synthetic biology provides new opportunities to overcome these bottlenecks. In this review, we first introduce the major species of propionibacteria and their properties and provide an overview of their functions and applications. We then discuss advances in the genome sequencing and metabolic engineering of these bacteria. Finally, we discuss systems and synthetic biology approaches for engineering propionibacteria as efficient and robust cell factories for the production of industrially important chemicals.
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10
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Christensen GJM, Brüggemann H. Bacterial skin commensals and their role as host guardians. Benef Microbes 2014; 5:201-15. [PMID: 24322878 DOI: 10.3920/bm2012.0062] [Citation(s) in RCA: 194] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Recent years' investigations of the co-evolution and functional integration of the human body and its commensal microbiota have disclosed that the microbiome has a major impact on physiological functions including protection against infections, reaction patterns in the immune system, and disposition for inflammation-mediated diseases. Two ubiquitous members of the skin microbiota, the Gram-positive bacteria Staphylococcus epidermidis and Propionibacterium acnes, are predominant on human epithelia and in sebaceous follicles, respectively. Their successful colonisation is a result of a commensal or even mutualistic lifestyle, favouring traits conferring persistency over aggressive host-damaging properties. Some bacterial properties suggest an alliance with the host to keep transient, potential pathogens at bay, such as the ability of S. epidermidis to produce antimicrobials, or the production of short-chain fatty acids by P. acnes. These features can function together with host-derived components of the innate host defence to establish and maintain the composition of a health-associated skin microbiota. However, depending largely on the host status, the relationship between the human host and S. epidermidis/P. acnes can also have parasitic features. Both microorganisms are frequently isolated from opportunistic infections. S. epidermidis is a causative agent of hospital-acquired infections, mostly associated with the use of medical devices. P. acnes is suspected to be of major importance in the pathogenesis of acne and also in a number of other opportunistic infections. In this review we will present bacterial factors and traits of these two key members of our skin microbiota and discuss how they contribute to mutualistic and parasitic properties. The elucidation of their roles in health-promoting or disease-causing processes could lead to new prophylactic and therapeutic strategies against skin disorders and other S. epidermidis/P. acnes-associated diseases, and increase our understanding of the delicate interplay of the skin microbiota with the human host.
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Affiliation(s)
- G J M Christensen
- Department of Biomedicine, Aarhus University, Wilhelm Meyers Allé 4, 8000 Aarhus C, Denmark
| | - H Brüggemann
- Department of Biomedicine, Aarhus University, Wilhelm Meyers Allé 4, 8000 Aarhus C, Denmark
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Timbermont L, De Smet L, Van Nieuwerburgh F, Parreira VR, Van Driessche G, Haesebrouck F, Ducatelle R, Prescott J, Deforce D, Devreese B, Van Immerseel F. Perfrin, a novel bacteriocin associated with netB positive Clostridium perfringens strains from broilers with necrotic enteritis. Vet Res 2014; 45:40. [PMID: 24708344 PMCID: PMC3992141 DOI: 10.1186/1297-9716-45-40] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Accepted: 03/13/2014] [Indexed: 11/10/2022] Open
Abstract
Necrotic enteritis in broiler chickens is associated with netB positive Clostridium perfringens type A strains. It is known that C. perfringens strains isolated from outbreaks of necrotic enteritis are more capable of secreting factors inhibiting growth of other C. perfringens strains than strains isolated from the gut of healthy chickens. This characteristic could lead to extensive and selective presence of a strain that contains the genetic make-up enabling to secrete toxins that cause gut lesions. This report describes the discovery, purification, characterization and recombinant expression of a novel bacteriocin, referred to as perfrin, produced by a necrotic enteritis-associated netB-positive C. perfringens strain. Perfrin is a 11.5 kDa C-terminal fragment of a 22.9 kDa protein and showed no sequence homology to any currently known bacteriocin. The 11.5 kDa fragment can be cloned into Escherichia coli, and expression yielded an active peptide. PCR detection of the gene showed its presence in 10 netB-positive C. perfringens strains of broiler origin, and not in other C. perfringens strains tested (isolated from broilers, cattle, sheep, pigs, and humans). Perfrin and NetB are not located on the same genetic element since NetB is plasmid-encoded and perfrin is not. The bacteriocin has bactericidal activity over a wide pH-range but is thermolabile and sensitive to proteolytic digestion (trypsin, proteinase K). C. perfringens bacteriocins, such as perfrin, can be considered as an additional factor involved in the pathogenesis of necrotic enteritis in broilers.
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Affiliation(s)
- Leen Timbermont
- Department of Pathology, Bacteriology and Avian Diseases, Research Group Veterinary Public Health and Zoonoses, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium.
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Gautam N, Sharma N, Ahlawat OP. Purification and Characterization of Bacteriocin Produced by Lactobacillus brevis UN Isolated from Dhulliachar: a Traditional Food Product of North East India. Indian J Microbiol 2013; 54:185-9. [PMID: 25320420 DOI: 10.1007/s12088-013-0427-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2012] [Accepted: 09/20/2013] [Indexed: 10/26/2022] Open
Abstract
A bacteriocin producing strain Lactobacillus brevis UN isolated from Dulliachar-a salted pickle and identified by biochemical and molecular methods. L. brevis UN was found to produce bacteriocin with broad spectrum activity against spoilage causing/food borne pathogens viz. L. monocytogenes, C. perfringens, S. aureus, L. mesenteroides, L. plantarum and B. cereus. Bacteriocin production was optimized through classical one variable at a time method. The isolate showed maximum bacteriocin production at early stationary phase, pH 4.0, temperature 35 °C and with an inoculum size of 1.5 OD @ 10 %. Bacteriocin produced by L. brevis UN was purified to homogeneity by single step gel exclusion chromatography and was most active at pH 6.0 and 7.0, stable up to 100 °C and was proteinaceous in nature. The results of NMR revealed the presence of proline, glutamic acid, aspartic acid, leucine, isoleucine and serine in its peptide structure. PCR amplification analysis determined that bacteriocin encoded gene in L. brevis UN was plasmid bound.
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Affiliation(s)
- Neha Gautam
- Microbiology Research Laboratory, Department of Basic Science, Dr. Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan, 173 230 HP India
| | - Nivedita Sharma
- Microbiology Research Laboratory, Department of Basic Science, Dr. Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan, 173 230 HP India
| | - O P Ahlawat
- Directorate of Mushroom Research, Chambaghat, Solan, 173 212 HP India
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Poonam, Pophaly SD, Tomar SK, De S, Singh R. Multifaceted attributes of dairy propionibacteria: a review. World J Microbiol Biotechnol 2012; 28:3081-95. [PMID: 22806746 DOI: 10.1007/s11274-012-1117-z] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Accepted: 06/21/2012] [Indexed: 12/31/2022]
Abstract
Dairy propionibacteria are Generally Recognized as Safe (GRAS) status microorganisms which have been traditionally used for the manufacture of Swiss type cheeses. In the last two decades various added features and functionalities have been discovered and developed from these bacteria. Propionibacteria are robust organisms with remarkable adaptability to technological and physiological stress conditions. Besides, they also display a multitude of health promoting properties like modulation of gut microbiota, improved gut physiology and immunomodulation suggesting their promising probiotic potential. Propionibacteria produce an interestingly wide range of functional biomolecules like B group vitamins, trehalose, conjugated linoleic acid, propionic acid, bacteriocins, bifidogenic factors etc. These bacteria are thus now being explored for designing novel functional foods as well as for industrial production of nutraceuticals. Growing interest in these bacteria is fueled by the first whole genome sequencing of a Propionibacterium freudenreichii strain providing a platform for better understanding of various pathways and further improvement in related process technologies.
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Affiliation(s)
- Poonam
- Dairy Microbiology Division, National Dairy Research Institute, Karnal, Haryana 132001, India
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Thierry A, Deutsch SM, Falentin H, Dalmasso M, Cousin FJ, Jan G. New insights into physiology and metabolism of Propionibacterium freudenreichii. Int J Food Microbiol 2011; 149:19-27. [DOI: 10.1016/j.ijfoodmicro.2011.04.026] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2010] [Revised: 04/14/2011] [Accepted: 04/29/2011] [Indexed: 01/25/2023]
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