Novel findings on hopanoid occurrences among sulfate reducing bacteria: Is there a direct link to nitrogen fixation?

Bacteriohopanepolyols in tropical soils and sediments from the Congo River catchment area

“…Aminopentol (1f) is a biomarker for Type I methanotrophs (Rohmer et al, 1984;Neunlist and Rohmer, 1985;Cvejic et al, 2000;Talbot et al, 2001;Coolen et al, 2008;van Winden et al, 2012a), with only one report of a non-methanotroph source, a species of Desulfovibrio sulfate reducing bacterium, which had an extremely low concentration of aminopentol when grown in pure culture (Blumenberg et al, 2012). Concentrations of CH 4 oxidation markers (see Section 2.6 for definition; 1e, 1f, 4/5f, 1f 0 ) varied throughout the samples here.…”

Rare bacteriohopanepolyols as markers for an autotrophic, intra-aerobic methanotroph

“…Cooke et al, 2008;Handley et al, 2010;Talbot and Farrimond, 2007;Berndmeyer et al, 2013;Talbot et al, 2014;Wagner et al, 2014). BHP-aminopentol IVc and the methylated derivative IVd is thus far associated with type I methanotrophs (Cvejic et al, 2000;Neunlist and Rohmer, 1985b;Talbot et al, 2001;van Winden et al, 2012) with one additional report of extremely low trace levels in one SRB (Blumenberg et al, 2012). Whilst aminopentol IVc is reported quite frequently in environmental studies (e.g.…”

“…BHP-aminotetrol IIIc is considered characteristic for methanotrophs, although it is also found at low levels in certain (anaerobic) SRB (Blumenberg et al, 2006(Blumenberg et al, , 2009(Blumenberg et al, , 2012. Composite pentafunctionalised BHPs have been reported with a carbapseudopentose or cyclitol ether group at the C35 position (e.g.…”

“…The pentafunctionalised 32,33,see Fig. 1 for structures) is found in most methanotrophs from the alpha-and gammaproteobacteria (Talbot and Farrimond, 2007), in very small amounts in Methylacidiphilum fumariolicum SolV (a recently reported methanotroph from the phylum Verrucomicrobia) (van Winden et al, 2012), and in low levels in some SRB (Blumenberg et al 2006(Blumenberg et al , 2009a(Blumenberg et al , 2012. For the hexafunctionalised 31,32,33,, the gamma-proteobacterial (also known as type I) methanotrophs are thus far the only known source organisms (Talbot and Farrimond, 2007), except for one report of trace levels in SRB (Blumenberg et al, 2012).…”

“…This idea changed with the observation of hopanoid biosynthesis in several facultative anaerobes and fermentative bacteria (e.g. Bringer et al, 1985;Llopiz et al, 1992;Neunlist et al, 1985;Neunlist and Rohmer, 1985a), and more recently also in anaerobic cultures of anammox bacteria (planctomycetes) (Sinninghe Damsté et al, 2004), Geobacter species (Eickhoff et al, 2013;Fischer et al, 2005;Hartner et al, 2005), and sulfate reducing bacteria (SRB) of the genus Desulfovibrio (Blumenberg et al, 2006(Blumenberg et al, , 2009a(Blumenberg et al, , 2012.…”