Phage-like Structures from Lactobacillus acidophilus

Klerk, H. C. De; Hugo, Nicolas

doi:10.1099/0022-1317-8-3-231

Cited by 16 publications

(11 citation statements)

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“…Lysogeny in the genus Lactobaciilus was first reported by Coetzee and de Klerk [28], who subjected 343 strains of Lactobacillus (from seven species) to UV irradiation and identified two lysogens. An additional 80 strains were examined in a later study in the same laboratory [29] and culture supematants of 16 strains inhibited the growth of other strains. Phage-like particles were observed in eight of the 16 supernatants.…”

Section: Lactobacillusmentioning

confidence: 99%

“…With the exception of a small number of prolate-headed examples [15,30,35] all temperate phages from. Lactococcus and Lactobacillus are isometricheaded [4,6,7,13,14,22,25,27,29,32,[34][35][36][37][38][39][40]. Head diameters vary from 56 to 78 nm and tail lengths from 120 to 182 nm, except for some phages which have longer tails (250-300 nm) [34,37,40].…”

Section: Morphologymentioning

confidence: 99%

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Temperate bacteriophages and lysogeny in lactic acid bacteria

Davidson

Powell

Hillier

1990

FEMS Microbiology Letters

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Lysogeny is widespread in the lactic acid bacteria. The majority of lysogens can be induced by UV irradiation or treatment with mitomycin C, but indicator strains which allow lytic growth of the induced phage are often not easy to identify. A few temperate phages have been shown to transduce chromosomal and/or plasmid markers. Information about the molecular biology of the temperate phages from lactic acid bacteria is sparse and needs significant supplementation in order that these potentially valuable phages might be utilized more efficiently as tools for improving existing starter strains in dairy fermentations.

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Section: Lactobacillusmentioning

confidence: 99%

Section: Morphologymentioning

confidence: 99%

Temperate bacteriophages and lysogeny in lactic acid bacteria

Davidson

Powell

Hillier

1990

FEMS Microbiology Letters

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“…It has not been observed for this phage in the present work, but a small connector disc was sometimes visible, at the head-tail junction. In addition, the L. bulgaricus phages (y5 and chi) of the second group, show, with the phage of L. lactis LKT, a terminal structure similar to the socalled flower-like or inflorescence-like cluster of fibres at the tail tip of several phages of other Lactobacillus species (de Klerk & Hugo 1970;Toyama et ul. 1972).…”

Section: Discussionmentioning

confidence: 99%

“…L. acidophilus, a related species of L . helveticus (de Klerk & Hugo 1970), L. salivarius (Toyama et al 1972), L. casei and its variants (Stetter 1978), L. fermenti (de Klerk & Coetzee 1965), and various species of lactobacilli (Yokokura et al 1974).…”

Section: Discussionmentioning

confidence: 99%

Morphology of Bacteriophages of Lactobacillus bulgaricus, L. lactis and L. helveticus

Accolas

Spillmann

1979

Journal of Applied Bacteriology

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Eleven virulent phages isolated from cheese or yoghurt factories and active on thermophilic lactobacilli used as starters were examined by electron microscopy. Five phages active on Lactobacillus bulgaricus belonged to Bradley's group B and can be divided into two groups with different host specificity. The three phages of the first group (two isolated in France, one in the USA) differ in size; the heads are either icosahedrons or octahedrons and the tails end in short‐pronged base plates. The two phages of the second group, isolated in the USA. appear very similar. These are similar in length, have collars and octahedral heads. The non‐contractile tails end in clusters of short fibres. An L. lactis phage, isolated in Finland, belongs to the same morphological group. It is similar in overall appearance to the two latter phages of the second group of L. bulgaricus, and there were numerous ghosts with polytails. Five phages. active on L. helveticus belong to Bradley's group A and may be divided into two groups with different host specificity. The first group contains a phage isolated in Finland. The second group is composed of four similar phages isolated in France. The Finnish phage is the largest, but the five phages show similar morphology. They have octahedral heads, firmly attached to the tails by connector devices, and they possess necks. The contractile sheaths have a helicoidal arrangement of hollow tubular subunits. They appear contracted either in a distal or a cervical position, revealing axial cores. Short tail fibres are probably present at the tail tip.

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“…Quite recently, 2 temperate phages of Lactobacillus casci, three of Lactobacillus salivarius [16] and 3 phage-like structures of Lactobacillus acidophilus [8] were reported. All but one, which is phage PLS-1 [18,24] derived from L. salivarius SaS [16], were defective, as far as they were tested.…”

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confidence: 99%

Studies on Temperate Phages of Lactobacillus salivarius

Tohyama

Sakurai

Arai

et al. 1972

Japanese Journal of Microbiology

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Twenty-three temperate phages of Lactobacillus salivarius isolated from human feces were studied as to their morphological, biological, and serological properties. (1) Among 30 strains of L. salivari-ts tested, 23 strains were lysed by induction with mitomycin C (MC). In all these lysates, phage particles were detected by electron microscopic examination. (2) These phages were morphologically divided into three groups: particles with a regular hexagonal head and a long flexible tail; particles having a regular hexagonal head with or without a short tail-like structure; particles with an elongated head and a long noncontractile tail. (3) Only two, phage 223 having an elongated head and phage 227 with a regular hexagonal head and a long noncontractile tail, produced tiny and very turbid plaques on several host bacteria. Six phages could produce only inhibition zones, ranging from complete inhibition through partial inhibition to normal growth by a serial dilution spot test. (4) All these killer particles could also inhibit the growth of their producer cells. (5) A serological relationship was observed between temperate phages and killer particles, and this was somewhat consistent with the morphological groupings.

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Phage-like Structures from Lactobacillus acidophilus

Cited by 16 publications

References 0 publications

Temperate bacteriophages and lysogeny in lactic acid bacteria

Temperate bacteriophages and lysogeny in lactic acid bacteria

Morphology of Bacteriophages of Lactobacillus bulgaricus, L. lactis and L. helveticus

Studies on Temperate Phages of Lactobacillus salivarius

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