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Polyphasic characterization of the thermotolerant cyanobacterium Desertifilum sp. strain IPPAS B-1220.
- Source :
-
FEMS Microbiology Letters . Feb2017, Vol. 364 Issue 4, p1-10. 10p. - Publication Year :
- 2017
-
Abstract
- A cyanobacterial strain from Lake Shar-Nuur, a freshwater lake in Mongolia, was isolated and characterized by a polyphasic approach. According to the 16S ribosomal RNA gene sequence, this strain (IPPAS B-1220) belongs to a newly described genus Desertifilum. In general, strains of Desertifilum maintain their genetic stability, as seen from the analysis of the 16S rRNA gene and 16S-23S rRNA internal transcribed spacer sequences from strains collected at distant locations. The newly discovered strain is characterized by an unusual fatty acid composition (16:1Δ7 and 16:2Δ7,10). Analysis of its draft genomic sequence reveals the presence of six genes for the acyl-lipid desaturases: two Δ9-desaturases, desC1 and desC2; two Δ12-desaturases, desA1 and desA2; one desaturase of unknown specificity, desX; and one gene for the bacillary-type desaturase, desG, which supposedly encodes an ω9-desaturase. A scheme for a fatty acid desaturation pathway that describes the biosynthesis of 16:1Δ7 and 16:2Δ7,10 fatty acids in Desertifilum is proposed. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CYANOBACTERIA
*NUCLEOTIDE sequence
*BACTERIAL genetics
Subjects
Details
- Language :
- English
- ISSN :
- 03781097
- Volume :
- 364
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- FEMS Microbiology Letters
- Publication Type :
- Academic Journal
- Accession number :
- 121908531
- Full Text :
- https://doi.org/10.1093/femsle/fnx027