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Cytochrome c_(554)

Iverson, Tina M. and Hendrich, Michael P. and Arciero, David M. and Hooper, Alan B. and Rees, Douglas C. (2011) Cytochrome c_(554). In: Encyclopedia of Inorganic and Bioinorganic Chemistry. Wiley , Hoboken, NJ, pp. 1-12. ISBN 9781119951438.

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Cytochrome c_(554) (cyt c_(554)) is a tetra‐heme c‐type cytochrome that participates in the nitrification pathway of Nitrosomonas europaea. In this process, cyt c_(554) functions as the electron acceptor from the enzyme hydroxylamine oxidoreductase that catalyzes the oxidation of hydroxylamine to nitrite. Cyt c_(554) is a predominantly α‐helical protein with four covalently attached hemes. The four hemes are arranged in two pairs, such that the planes of the porphyrin rings are nearly parallel and overlapping at the edges. This type of heme‐stacking has been observed in two other nitrogen cycle proteins: hydroxylamine oxidoreductase and cytochrome c nitrite reductase, an enzyme that catalyzes the reduction of nitrite to ammonia. The relatively unusual spectral properties of cyt c_(554) may reflect interactions between these pairs of stacked hemes.

Item Type:Book Section
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Rees, Douglas C.0000-0003-4073-1185
Additional Information:© 2011 John Wiley & Sons, Ltd. Published Online: 15 December 2011. Supported by NSF Research to ABH (#MCB-9316906) and NIH to DCR (GM45162).
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Subject Keywords:cytochrome c_(554); biological nitrogen cycle; heme‐proteins; electron transfer proteins; nitrification
Record Number:CaltechAUTHORS:20180424-134640337
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Official Citation:Iverson, T. M., Hendrich, M. P., Arciero, D. M., Hooper, A. B. and Rees, D. C. (2011). Cytochrome c554. In Encyclopedia of Inorganic and Bioinorganic Chemistry, R. A. Scott (Ed.). doi:10.1002/9781119951438.eibc0538
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:86024
Deposited By: Tony Diaz
Deposited On:25 Apr 2018 17:36
Last Modified:03 Oct 2019 19:38

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