Oxidation-induced modification of the fibrinogen polypeptide chains

A. V. Bychkova, A. D. Vasilyeva, A. E. Bugrova, M. I. Indeykina, A. S. Kononikhin, E. N. Nikolaev, M. L. Konstantinova, M. A. Rosenfeld

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)

    Abstract

    By using the mass-spectrometry method, the oxidative modifications of the fibrinogen Aα, Bβ, and γ polypeptide chains induced by its oxidation have been studied. The αC-region has been proven to be the most vulnerable target for the oxidizer (ozone) as compared with the other structural elements of the Aα chain. The Bβ chain mapping shows that the oxidative sites are localized within all the structural elements of the chain in which the β-nodule exhibits high susceptibility to oxidation. The γ chains are the least vulnerable to the oxidizer action. The results obtained demonstrate convincingly that the self-assembly centers dealing with interactions of knob “A”: hole “a” are not involved in oxidative modification. It is concluded that the numerous oxidative sites revealed are mainly responsible for inhibiting lateral aggregation of protofibrils. The part of amino acid residues subjected to oxidation is supposed to carry out the antioxidant function.

    Original languageEnglish
    Pages (from-to)173-177
    Number of pages5
    JournalDoklady Biochemistry and Biophysics
    Volume474
    Issue number1
    DOIs
    Publication statusPublished - 1 May 2017

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