title: Prokaryotic triterpenoids. 1. 3 beta-Methylhopanoids from Acetobacter species and Methylococcus capsulatus.
abstract: 3 beta-Methylbacteriohopanepolyol derivatives were isolated from three bacteria, Acetobacter pasteurianus ssp. pasteurianus, Methylococcus capsulatus and Nostoc muscorum, and identified by spectroscopic methods and direct comparison with 3 beta-methyldiplopterol and 3 beta-methylhopan-29-ol synthesized from 22-hydroxyhopan-3-one. The 3 beta-methylhopanoid content of A. pasteurianus ssp. pasteurianus could be dramatically increased (up to 60% of the total hopanoid content) by addition of L-methionine, the actual methyl donor, to the culture medium.
mesh_terms: D000091:Acetobacter / Q000032:analysis*; D055598:Chemical Phenomena; D002621:Chemistry; D002849:Chromatography, Gas; D002855:Chromatography, Thin Layer; D000458:Cyanobacteria / Q000032:analysis; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008745:Methylation; D008772:Methylococcaceae / Q000032:analysis*; D014315:Triterpenes / Q000138:chemical synthesis / Q000302:isolation & purification*
chemical_list: D014315:Triterpenes