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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. John Wiley and Sons, Inc. , Hoboken, NJ, Art. No. eibc0538. 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 DEC 2011. This article was originally published in the Handbook of Metalloproteins in 2006 by John Wiley & Sons, Ltd. Supported by NSF Research to ABH (# MCB-9316906) and NIH to DCR (GM45162).
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Subject Keywords:cytochrome c554; biological nitrogen cycle; heme-proteins; electron transfer proteins; nitrification
Record Number:CaltechAUTHORS:20170330-105823002
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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. Encyclopedia of Inorganic and Bioinorganic Chemistry
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75541
Deposited By: Tony Diaz
Deposited On:30 Mar 2017 19:15
Last Modified:03 Oct 2019 16:51

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