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Effect of polyanions on ferricytochrome c.

作者信息

Sedlák E

机构信息

Department of Biochemistry, Faculty of Science, P.J. Safárik University, Kosice, Slovakia.

出版信息

Biochem Mol Biol Int. 1997 Jan;41(1):25-32. doi: 10.1080/15216549700201021.

DOI:10.1080/15216549700201021
PMID:9043631
Abstract

Effects of two polyanions (heparin, Nafion) on absorption and CD spectra in the Soret region, and on fluorescence of ferricytochrome c were investigated. The conformational state of ferricyt c in the complexes with studied polyanions is significantly different. Whereas heparin affects the structure in the heme region of ferricyt c only slightly (ferricyt c remains in a native-like state), the influence of Nafion is more expressive (the Met-80-heme iron bond and the deeply buried region around Trp-59 are perturbed). Shift of the pK of the transition from neutral low-spin state to acidic high-spin state to higher pH values was observed.

摘要

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