Lactobacillaceae

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Lactobacillaceae
Lactobacillus sp 01.png
Lactobacillus near a squamous epithelial cell
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Bacteria
Phylum: Bacillota
Class: Bacilli
Order: Lactobacillales
Family: Lactobacillaceae
Winslow et al. 1917 (Approved Lists 1980)
Type genus
Lactobacillus
Beijerinck 1901 (Approved Lists 1980)
Genera [1] [2]
Synonyms [2]
  • LeuconostocaceaeSchleifer 2010

The Lactobacillaceae are a family of lactic acid bacteria. [3] It is the only family in the lactic acid bacteria which includes homofermentative and heterofermentative organisms; [4] in the Lactobacillaceae, the pathway used for hexose fermentation is a genus-specific trait. Lactobacillaceae include the homofermentative lactobacilli Lactobacillus, Holzapfelia, Amylolactobacillus, Bombilactobacillus, Companilactobacillus, Lapidilactobacillus, Agrilactobacillus, Schleiferilactobacillus, Loigolactobacillus, Lacticaseibacillus, Latilactobacillus, Dellaglioa, Liquorilactobacillus, Ligilactobacillus, and Lactiplantibacillus; the heterofermentative lactobacilli Furfurilactobacillus, Paucilactobacillus, Limosilactobacillus, Fructilactobacillus, Acetilactobacillus, Apilactobacillus, Levilactobacillus, Secundilactobacillus, and Lentilactobacillus, which were previously classified in the genus Lactobacillus ; and the heterofermentative genera Convivina, Fructobacillus, Leuconostoc, Oenococcus, and Weissella which were previously classified in the Leuconostocaceae. [2]

Contents

The Lactobacillaceae are also the only family of the lactic acid bacteria which does not include pathogenic or opportunistic pathogenic organisms although some species, particularly Lacticaseibacillus rhamnosus and Weissella spp. can cause rare infections in critically ill patients. [5] [6]

With the exception of Lactococcus lactis, Streptococcus thermophilus and Tetragenococcus halophilus, most food fermenting lactic acid bacteria are now classified in the Lactobacillaceae. [2] [7] [8]

The grandfathered term lactobacilli refers to all bacteria classified in Lactobacillaceae prior to 2020, i.e. Lactobacillus sensu lato (pre-split), Pediococcus , and Sharpea . [2] Some authors use lactobacilli to refer to Lactobacillussensu lato only.

Leuconostocaceae

At one point five genera (Convivina, Fructobacillus, Leuconostoc, Oenococcus and Weissella) were considered a separate family called Leuconostocaceae. [9] These three genera are non-spore-forming, round or elongated in shape, and anaerobic or aerotolerant. They usually inhabit nutrient-rich environments such as milk, meat, vegetable products, and fermented drinks. [10] [11] Lactic acid is the main end product of their characteristic heterofermentative carbohydrate metabolism. In 2020 Leuconostocaceae was synonymized with Lactobacillaceae. [2]

Phylogeny

The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature [1] and the phylogeny is based on whole-genome sequences. [2]

Lactobacillaceae

Loigolactobacillus

Paralactobacillus

Latilactobacillus

Lacticaseibacillus

Schleiferilactobacillus

Agrilactobacillus

Lapidilactobacillus

Bombilactobacillus

Companilactobacillus

Holzapfelia

Lactobacillus

Amylolactobacillus

Dellaglioa

Ligilactobacillus

Liquorilactobacillus

Pediococcus

Furfurilactobacillus

Limosilactobacillus

Paucilactobacillus

Lactiplantibacillus

Levilactobacillus

Secundilactobacillus

Lentilactobacillus

Fructilactobacillus

Apilactobacillus

Acetilactobacillus

Weissella

formerly Leuconostocaceae

Oenococcus

Leuconostoc

Fructobacillus

Convivina

outgroup

Enterococcaceae

Related Research Articles

<span class="mw-page-title-main">Sourdough</span> Bread product

Sourdough or sourdough bread is a bread made by the fermentation of dough using wild lactobacillaceae and yeast. Lactic acid from fermentation imparts a sour taste and improves keeping qualities.

<i>Lactobacillus</i> Genus of bacteria

Lactobacillus is a genus of gram-positive, aerotolerant anaerobes or microaerophilic, rod-shaped, non-spore-forming bacteria. Until 2020, the genus Lactobacillus comprised over 260 phylogenetically, ecologically, and metabolically diverse species; a taxonomic revision of the genus assigned lactobacilli to 25 genera.

Fructilactobacillus sanfranciscensis is a heterofermentative species of lactic acid bacteria which, through the production mainly of lactic and acetic acids, helps give sourdough bread its characteristic taste. It is named after San Francisco, where sourdough was found to contain the variety, though it is dominant in Type I sourdoughs globally. In fact, F. sanfranciscensis has been used in sourdough breads for thousands of years, and is used in 3 million tons of sourdough goods yearly.

Pediococcus is a genus of gram-positive lactic acid bacteria, placed within the family of Lactobacillaceae. They usually occur in pairs or tetrads, and divide along two planes of symmetry, as do the other lactic acid cocci genera Aerococcus and Tetragenococcus. They are purely homofermentative.

<i>Lacticaseibacillus casei</i> Species of bacterium

Lacticaseibacillus caseiis an organism that belongs to the largest genus in the family Lactobacillaceae, a lactic acid bacteria (LAB), that was previously classified as Lactobacillus casei-01. This bacteria has been identified as facultatively anaerobic or microaerophilic, acid-tolerant, non-spore-forming bacteria. The taxonomy of this group has been debated for several years because researchers struggled to differentiate between the strains of L. casei and L. paracasei. It has recently been accepted as a single species with five subspecies: L. casei subsp. rhamnosus, L. casei subsp. alactosus, L. casei subsp. casei, L. casei subsp. tolerans, and L. casei subsp. pseudoplantarum. The taxonomy of this genus was determined according to the phenotypic, physiological, and biochemical similarities.

Leuconostoc is a genus of gram-positive bacteria, placed within the family of Lactobacillaceae. They are generally ovoid cocci often forming chains. Leuconostoc spp. are intrinsically resistant to vancomycin and are catalase-negative. All species within this genus are heterofermentative and are able to produce dextran from sucrose. They are generally slime-forming.

<span class="mw-page-title-main">Lactic acid bacteria</span> Order of bacteria

Lactobacillales are an order of gram-positive, low-GC, acid-tolerant, generally nonsporulating, nonrespiring, either rod-shaped (bacilli) or spherical (cocci) bacteria that share common metabolic and physiological characteristics. These bacteria, usually found in decomposing plants and milk products, produce lactic acid as the major metabolic end product of carbohydrate fermentation, giving them the common name lactic acid bacteria (LAB).

<i>Oenococcus</i> Genus of bacteria

Oenococcus is a genus of gram-positive bacteria, placed within the family Lactobacillaceae. The only species in the genus was Oenococcus oeni. In 2006, the species Oenococcus kitaharae was identified. As its name implies, Oenococcus oeni holds major importance in the field of oenology, where it is the primary bacterium involved in completing malolactic fermentation.

<i>Weissella</i> Genus of bacteria

Weissella is a genus of gram-positive bacteria placed within the family Lactobacillaceae, formerly considered species of the Leuconostoc paramesenteroides group. The morphology of Weissella species varies from spherical or lenticular cells to irregular rods. Several strains of Weissella cibaria and Weissella confusa have shown probiotic potential. In particular, the cell-free culture supernatant of Weissella confusa shows a number of beneficial characteristics, such as antibacterial potential and anti-inflammatory efficiency. However, several strains of W. confusa are opportunistic bacteria. A number of studies have been done on the safety of the bacterial species, indicating their probiotic potential. The Senate Commission on Food Safety has validated the use of W. confusa in food.

Limosilactobacillus fermentum is a Gram-positive species in the heterofermentative genus Limosilactobacillus. It is associated with active dental caries lesions. It is also commonly found in fermenting animal and plant material including sourdough and cocoa fermentation. A few strains are considered probiotic or "friendly" bacteria in animals and at least one strain has been applied to treat urogenital infections in women. Some strains of lactobacilli formerly mistakenly classified as L. fermentum have since been reclassified as Limosilactobacillus reuteri. Commercialized strains of L. fermentum used as probiotics include PCC, ME-3 and CECT5716

<i>Oenococcus oeni</i> Species of bacterium

Oenococcus oeni is a Gram-positive bacterial species in the genus of Oenococcus. It was the only species in the genus until 2006, when the species Oenococcus kitaharae was identified. As its name implies, Oe. oeni holds major importance in the field of oenology, where it is the primary bacterium involved in completing the malolactic fermentation.

Weissella hellenica is a species of Gram-positive bacteria, placed within the family of Leuconostocaceae. It is frequently isolated from fermented sausage and flounder intestine, as well as Korean fermented pickle Kimchi and barrels used to make Japanese pickles. Some strains have been observed to be probiotic while some have not. Some strains produce bacteriocins named weissellicins which show antimicrobial activity against other bacteria.

Limosilactobacillus pontis is a rod-shaped, Gram-positive facultatively anaerobic bacterium. Along with other Lactobacillus species, it is capable of converting sugars, such as lactose, into lactic acid. Limosilactobacillus pontis is classified under the phylum Bacillota, class Bacilli, and is a member of the family Lactobacillaceae and is found to be responsible for the fermentation of sourdough, along with many other Lactobacillus species. This microorganism produces lactic acid during the process of fermentation, which gives sourdough bread its characteristic sour taste.

Ligilactobacillus acidipiscis is a species in the genus Ligilactobacillus. It is a homofermentative, rod-shaped lactic acid bacteria. Its type strain is FS60-1T.

Weissella thailandensis is a species of Gram-positive bacteria. It is a homofermentative, sphere-shaped lactic acid bacteria. Its type strain is FS61-1T. Its genome has been sequenced.

Weissella koreensis is a species of Gram-positive bacteria in the family Leuconostocaceae. The bacteria has irregular cells, is tolerant of acid, and does not develop spores. It was described by Lee et al. in 2002.

Limosilactobacillus is a thermophilic and heterofermentative genus of lactic acid bacteria created in 2020 by splitting from Lactobacillus. The name is derived from the Latin limosus "slimy", referring to the property of most strains in the genus to produce exopolysaccharides from sucrose. The genus currently includes 31 species or subspecies, most of these were isolated from the intestinal tract of humans or animals. Limosilactobacillus reuteri has been used as a model organism to evaluate the host-adaptation of lactobacilli to the human and animal intestine and for the recruitment of intestinal lactobacilli for food fermentations.

Convivina intestini is a species of lactic acid bacteria.

<i>Fructobacillus</i> Genus of bacteria

Fructobacillus is a genus of lactic acid bacteria.

Paucilactobacillus wasatchensis is a species of heterofermentative lactic acid bacteria (LAB). It is a non-starter LAB that was first isolated from aged Cheddar cheese showing gas defects from three different continents. The growth of P. wasatchensis is accelerated when ripening cheese is supplemented with ribose and galactose and incubated at elevated temperature. P. wasatchensis can be controlled by pasteurization, but post-pasteurization sources of contamination must be controlled.

References

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