Novel Long-Chain XXXX Phospholipids from Some Bacteria Belonging to the Class Thermomicrobia.

@entity844 @entity71724 @entity9715 @entity653 @entity3913 @entity1391 @entity5859 @entity1718 @entity27716
UNASSIGNED: Polar lipids of bacteria from the class Thermomicrobia are known to contain long-chain 1,2-diols instead of @entity653 , although the nature of polar head groups has not been investigated. We have studied phospholipid classes of two species from the class Thermomicrobia- @entity5859 and Thermomicrobia sp. WKT50.2. TLC and @entity9715 -NMR analysis of polar lipids revealed that both @entity5859 and Thermomicrobia sp. WKT50.2 contain the same set of four major phospholipid classes. Structures of the novel phospholipids in @entity5859 were established as 2-acylalkyldiol-1-O-phosphoinositol, 2-acylalkyldiol-1-O-phosphoinositol mannoside, 2-acylalkyldiol-1-O-phospho-acylmannoside, and 2-acylalkyldiol-1-O-phosphoinositol acylmannoside. To our knowledge, this is the first report of a phospholipid with a @entity3913 directly bound to the @entity1391 . We also analyzed @entity1718 and long-chain 1,2-diols of @entity5859 and Thermomicrobia sp. WKT50.2 and compared our data with available information for @entity71724 . All species share a similar set of @entity1718 , with 12-Me 18:0 being the major @entity844 . The major @entity27716 in @entity5859 was identified as 13-Me 19:0 (66.2  %). The 21:0 @entity27716 was the major component both in Thermomicrobia sp. WKT50.2 (50.6  %) and in @entity71724 (56.6  %).
