Metallosphaera sedula

Metallosphaera sedula [79h], which represents a new genus of aerobic metal-mobilizing thermophilic archaea in the order Sulfolobales, was found to contain a similar pattern of caldarchaeol and nonitolcaldarchaeol-derived glycolipids and the corresponding P-inositol phosphoglycolipids to those of Sulfolobus solfataricus (e.g., see structures 38, 38A, 44 and 44B, Fig. 8 [75,79]). However, the relative proportions of the major glycolipids (38 and 44) and the minor complex lipids of M. sedula differ somewhat from those of S. solfataricus. 

A cytochrome having the a peak at 579 nm is obtained from Leptospirillum ferrooxidans DSM 2706 (Hart et al., 1991). The cytochrome has 1 atom of zinc in addition to heme iron. Its molecular mass is 17.9 kDa and its Emj5 is +0.68 V (Blake et al., 1993). From L. ferrooxidans P3A, a cytochrome with the molecular mass of 12 kDa is obtained, while the 17.9 kDa cytochrome is not obtained. In any case, nothing is known about the function of the L. ferrooxidans cytochromes. Moreover, Metallosphaera sedula and Acidianus brierleyi have a membrane-bound yellow cytochrome which is reduced by ferrous ion (Blake and McGinness, 1993 Blake et al., 1993). However, the description here about cytochromes c will be limited to the proteins that have been purified from A. ferrooxidans and well characterized. 

Metallosphaera sedula Carbon dioxide Malonate semialdehyde Berg et al. (2007)... 

Hugler M, Krieger RS, Jahn M, Fuchs G (2003) Characterization of acetyl-CoA/propionyl-CoA carboxylase in Metallosphaera sedula. Eur J Biochem 270 736—744... 

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