Acidianus brierleyi

Starting from the composition of the Sulfolobus system, reconstituted poly(U)-programmed systems have been developed from other members of the crenarchaeota (T. tenax, D. mobilis) [66] Acidianus infernus (DSM 3191), Acidianus brierleyi (formerly called Sulfolobus brierleyi), Methallosphaera sedula (Sulfolobaceae) [Sanz, J.L., unpublished), and from the euryarchaeota T. acidophilum [66,127], T celer[66] and P woesei [128]. 

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. 

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