Sandbox Reserved 335

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Revision as of 01:39, 1 April 2011

This Sandbox is Reserved from January 10, 2010, through April 10, 2011 for use in BCMB 307-Proteins course taught by Andrea Gorrell at the University of Northern British Columbia, Prince George, BC, Canada.
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PDB ID 3cp5

Drag the structure with the mouse to rotate
3cp5, resolution 1.24Å ()
Ligands: ,
Gene: cytC (Rhodothermus marinus)
Resources: FirstGlance, OCA, PDBsum, RCSB
Coordinates: save as pdb, mmCIF, xml



Cytochrome c (cyt c) is a superfamily of proteins belonging to the class of all-α proteins with a core of helices and a covalently-bound heme prosthetic group.[1][2] The cytochrome c superfamily contains many different families including monodomain and multi-domain C-type cytochromes (ex. cyt c4, a two-domain C-type cytochrome, and NrfB, a pentaheme C-type cytochrome). This page focuses mainly on the cytochrome c superfamily, briefly discussing various types within the superfamily. The monoheme cytochrome c purified from Rhodothermus marinus will be discussed in greater detail than other C-type cytochromes.

Contents

Introduction

Rhodothermus marinus

Function

Structure

All members in the C-type cytochrome superfamily contain a heme prosthetic group that is covalently attached to the protein via two thioether bonds to cysteine residues.[2] Most cytochromes c occur in a CXXCH motif, where a histidine residue is one of the two axial ligands of the heme iron. The other axial position may be left vacant or be occupied mostly by histidine or methionine residues, but can sometimes be occupied by cysteine or leucine residues.[2]

Rhodothermus marinus monoheme cytochrome c

The typical monoheme cyt c fold is formed by helices .


Mechanism

Importance

References

Yay bacteria!!! [3]

  1. ↑ Gough J, Karplus K, Hughey R, Chothia C. Assignment of homology to genome sequences using a library of hidden Markov models that represent all proteins of known structure. J Mol Biol. 2001 Nov 2;313(4):903-19. PMID:11697912 doi:10.1006/jmbi.2001.5080
  2. ↑ 2.0 2.1 2.2 Stelter M, Melo AM, Pereira MM, Gomes CM, Hreggvidsson GO, Hjorleifsdottir S, Saraiva LM, Teixeira M, Archer M. A Novel Type of Monoheme Cytochrome c: Biochemical and Structural Characterization at 1.23 A Resolution of Rhodothermus marinus Cytochrome c. Biochemistry. 2008 Oct 15. PMID:18855424 doi:10.1021/bi800999g
  3. ↑ Alfredsson GA, Kristjansson JK, Hjörleifsdottir S, Stetter, KO. Rhodothermus marinus, gen. nov., sp. nov., a thermophilic, halophilic bacterium from submarine hot springs in Iceland. J Gen Microbiol. 1988 Feb;134(2):299-306.
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