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Titolo:
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)
Autore:
Hezayen, FF; Rehm, BHA; Tindall, BJ; Steinbuchel, A;
Indirizzi:
Wilhelms Univ Munster, Inst Mikrobiol & Westfal, D-48149 Munster, Germany Wilhelms Univ Munster Munster Germany D-48149 , D-48149 Munster, Germany Fac Sci, Dept Bot, Aswan, Egypt Fac Sci Aswan EgyptFac Sci, Dept Bot, Aswan, Egypt DSMZ, D-38124 Braunschweig, Germany DSMZ Braunschweig Germany D-38124DSMZ, D-38124 Braunschweig, Germany
Titolo Testata:
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
, volume: 51, anno: 2001,
parte:, 3
pagine: 1133 - 1142
SICI:
1466-5026(200105)51:<1133:TONABT>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
PERFORMANCE LIQUID-CHROMATOGRAPHY; RIBOSOMAL-DATABASE-PROJECT; GEN. NOV.; HALOBACTERIUM-LACUSPROFUNDI; LIPID-COMPOSITION; ALKALIPHILIC HALOBACTERIA; HALOFERAX-MEDITERRANEI; DEOXYRIBONUCLEIC-ACID; SALT-LAKE; COMB-NOV;
Keywords:
Natrialba aegyptiaca sp nov.; Natrialba asiatica; extremely halophilic archaeon; exopolymer; poly(glutamic acid);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
55
Recensione:
Indirizzi per estratti:
Indirizzo: Steinbuchel, A Wilhelms Univ Munster, Inst Mikrobiol & Westfal, Corrensstr3, D-48149 Munster, Germany Wilhelms Univ Munster Corrensstr 3 Munster Germany D-48149
Citazione:
F.F. Hezayen et al., "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)", INT J SY EV, 51, 2001, pp. 1133-1142

Abstract

A novel extremely halophilic member of the Archaea, strain 40(T), was isolated from Egypt (Aswan). This isolate requires at least 1.6 M sodium chloride for growth and exhibits optimal growth between 37 and 42 degreesC. Determination of the entire 16S rRNA gene sequence revealed the highest similarity to the type strain of Natrialba asiatica (> 99 %). Polar lipid analysis indicated that strain 40T and Natrialba asiatica have essentially identicalcompositions, indicating that the former is a member of genus Natrialba. However, physiological and biochemical data provided evidence that Natrialbaasiatica strains B1T and 172P1(T), as well as strain 40(T), are sufficiently different to be divided in three different species. The G+C content of strain 40(T) was 61.5 +/-0.6 mol%. In addition, DNA-DNA hybridization data supported the placement of the isolate in a new species in the genus Natrialba, Natrialba aegyptiaca sp. nov., and indicated that Natrialba asiatica strain B1T should also be placed in a separate species, Natrialba taiwanensissp. nov. Morphological studies of strain 40T indicated clearly that this isolate appears in three completely different cell shapes (cocci, rods, tetrads) under different conditions of growth, including different sodium chloride concentrations and different growth temperatures. Another interesting property of strain 40T 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 (12.5 % w/w) and unidentified compounds (2.5 % w/w). Among the Archaea, production of an extracellular polysaccharide has been described for some members of the genera Haloferax and Haloarcula.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 00:17:37