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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2001-2-9
pubmed:databankReference
pubmed:abstractText
Facultatively alkaliphilic Bacillus sp. strain YN-2000 was isolated from an indigo ball. Although the strain has been extensively investigated as a representative strain of alkaliphilic bacillus, its taxonomic position is not yet known. Morphological, biochemical, and physiological characteristics and chemotaxonomic properties indicated that the strain was closely related to Bacillus cohnii; this was confirmed by the high homology of the 16S rRNA sequence and the construction of a phylogenetic tree on the basis of the 16S rRNA sequence and DNA-DNA relatedness data. Strain YN-2000 contained a larger amount of unsaturated fatty acids compared with Bacillus subtilis and the obligate alkaliphile, Bacillus alcalophilus, regardless of its culture pH. When the cells were grown at pH 10, the unsaturated fatty acid content and anteiso-/iso-branched fatty acid ratio became lower than those at pH 7. This result suggests that membrane fluidity decreases when the cells are grown at pH 10 compared to those of pH 7. In the cells of strain YN-2000 grown at pH 10, the cell-surface aspect was rougher, the cell shape was longer, and the cell-surface layer was thicker compared with those of the cells grown at pH 7. The cell-surface structural change might be related to adaptation to an alkaline environment.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
1431-0651
pubmed:author
pubmed:issnType
Print
pubmed:volume
4
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
285-90
pubmed:dateRevised
2001-11-13
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
Identification of facultatively alkaliphilic Bacillus sp. strain YN-2000 and its fatty acid composition and cell-surface aspects depending on culture pH.
pubmed:affiliation
Bioscience and Chemistry Division, Hokkaido National Industrial Research Institute, Sapporo, Japan. yumoto@hniri.go.jp
pubmed:publicationType
Journal Article