Oct 26, 1988

Resonance Raman spectroscopy indicates a lysine as the sixth iron ligand in cytochrome f

Biochimica Et Biophysica Acta
D J DavisD A Johnson


The resonance Raman spectrum of turnip cytochrome f is similar to that of other c-type cytochromes with the exception of a single band at 1532 cm-1 which is shifted to lower frequency relative to its position (1542-1545 cm-1) in other c-type cytochromes. Comparison of the frequency of this band with that in alkylated cytochrome c at high pH suggests that the sixth heme iron ligand in cytochrome f is a deprotonated lysine amino group rather than a methionine sulfur. Comparison of the amino-acid sequences of cytochromes f and c1 suggests lysine-145 as a likely candidate for the sixth heme iron ligand in cytochrome f.

Mentioned in this Paper

Raman Optical Activity Spectroscopy
Cytochrome F Activity
Cytochrome f
Apocytochrome f
Urine Lysine Measurement
Lysine Hydrochloride
Ligands Activity

About this Paper

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