Haloarcula spp able to biosynthesize exo- and endopolymers

Nicolaus, Barbara; Lama, Licia; Esposito, Enrico; Manca, Maria; Improta, Roberta; Bellitti, Maria Rosaria; Duckworth, A. W.; Grant, William D.; Gambacorta, Agata

doi:10.1038/sj.jim.2900738

Cited by 82 publications

(57 citation statements)

References 30 publications

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“…have been reported to produce extracellular polysaccharide material (Anto! n et al, 1988 ;Paramonov et al, 1998 ;Parolis et al, 1999 ;Nicolaus et al, 1999).…”

Section: F F Hezayen and Othersmentioning

confidence: 99%

Transfer of Natrialba asiatica B1T to Natrialba taiwanensis sp. nov. and description of Natrialba aegyptiaca sp. nov., a novel extremely halophilic, aerobic, non-pigmented member of the Archaea from Egypt that produces extracellular poly(glutamic acid).

Hezayen¹,

Rehm²,

Tindall³

et al. 2001

International Journal of Systematic and Evolutionary Microbiology

128

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Transfer of Natrialba asiatica B1T to Natrialba taiwanensis sp. nov. and description of Natrialba aegyptiaca sp. nov., a novel extremely halophilic, aerobic, non-pigmented member of the Archaea from Egypt that produces extracellular poly(glutamic acid) T is the ability to produce an extracellular polymer, which was found to be composed predominantly of glutamic acid (85 % w/w), representing poly(glutamic acid), carbohydrates (125 % w/w) and unidentified compounds (25 % w/w). Among the Archaea, production of an extracellular polysaccharide has been described for some members of the genera Haloferax and Haloarcula.

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“…have been reported to produce extracellular polysaccharide material (Anto! n et al, 1988 ;Paramonov et al, 1998 ;Parolis et al, 1999 ;Nicolaus et al, 1999).…”

Section: F F Hezayen and Othersmentioning

confidence: 99%

Transfer of Natrialba asiatica B1T to Natrialba taiwanensis sp. nov. and description of Natrialba aegyptiaca sp. nov., a novel extremely halophilic, aerobic, non-pigmented member of the Archaea from Egypt that produces extracellular poly(glutamic acid).

Hezayen¹,

Rehm²,

Tindall³

et al. 2001

International Journal of Systematic and Evolutionary Microbiology

128

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“…Generally such high salt resistance is typical of halobacteria belonging to the archaea domain (Nicolaus et al, 1999c). In fact, two main groups are to be found: the moderately halophilic bacteria are more abundant at intermediate salinities (1.5-2.5 M), whereas the halophilic archaea dominate at those greater than 2.5 M.…”

Section: Discussionmentioning

confidence: 99%

Extremophiles in Antarctica

Nicolaus¹,

Lama²,

Esposito³

et al. 2000

Italian Journal of Zoology

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Isolation and classification of extremophiles and cyanobacteria are described. Seven thermophiles, belonging to Bacillus genus, five acidothermophiles, classified as Alicyclobacillus, and five halotolerant cocci, belonging to Micrococcus genus, were isolated from Antarctic samples of geothermal and saline soils. The isolates were examined for their polar lipid and fatty acid composition. Changes in membrane lipids, induced by stressed growth conditions, were analysed. The isolation of two new cyanobacteria and their polysaccharide characterization were described. The exopolysaccharide production and characterization, as well as thermophilic xylan-degrading enzymes, were studied.

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“…In a screening program launched to find new polyhydroxyalkanoate and EPS producers, Nicolaus et al (1999) isolated three obligate halophilic microorganisms (the T5, T6, T7 strains) from an unexplored site in Tunisia (Monastir). All the isolates had polar lipid patterns, which is a peculiar characteristic of species belonging to the genus Haloarcula; in particular, strain T5 was identified as a new strain of H. japonica by DNA-DNA hybridization analysis (Nicolaus et al, 1999).…”

Section: Eps Produced By Extremophilic Bacteriamentioning

confidence: 99%