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Metalloproteins high-potential iron proteins

High-potential iron proteins (HiPIPs) comprise a subset of the 4Fe-4S cluster family of metalloproteins that are characterized by a positive reduction potential, F , in the range of +50 to +450 mV. This class is differentiated from the 4Fe-4S centers in low-potential ferredoxins, which show a negative E, tjrpically varying between -100 and -650 mV. The origin of these distinct redox properties has been rationalized in terms of the three-state hypothesis of Carter (1), summarized in Scheme 1, and can be attributed to the stability of the common [Fe4S4(SR)4] state. [Pg.313]

Structural studies on electron transfer metalloproteins provide an important origin for discussion of the electron transfer processes themselves.The reduction potentials of a number of cytochromes c, cyt c copper blue proteins plastocyanin, Pc azurin, Az stellacyanin, St and HiPIP, or high potential iron protein, from Chromatium vinosum have been determined using spectro-... [Pg.34]

See other pages where Metalloproteins high-potential iron proteins is mentioned: [Pg.113]    [Pg.5546]    [Pg.6204]    [Pg.1304]    [Pg.5545]    [Pg.6203]    [Pg.646]    [Pg.5408]    [Pg.126]    [Pg.5407]    [Pg.128]    [Pg.155]    [Pg.320]    [Pg.191]    [Pg.1304]    [Pg.796]    [Pg.347]   


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