The coiled coil-helix-coiled coil-helix proteins may be redox proteins
Abstract
A number of nuclear encoded proteins are imported in to the intermembrane space of mitochondria where they adopt a coiled coil-helix-coiled coil-helix (CHCH) fold. Two disulfide bonds formed by twin CX3C or CX9C motifs stabilize this fold. Some of these proteins are also characterized at their N-termini by the presence of two additional cysteine residues which can perform oxidoreductase or metallochaperone functions or both. This fold represents the most ‘minimal’ oxidoreductase domain described so far.
Keywords: Coil-coiled helix, Redox
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PII: S0014-5793(09)00257-9
doi:10.1016/j.febslet.2009.03.061
© 2009 Federation of European Biochemical Societies
