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    J Biochem. 1989 Jan;105(1):10-4.

    Fibrinogen Nagoya, a replacement of glutamine-329 by arginine in the gamma-chain that impairs the polymerization of fibrin monomer.

    Source

    Department of Biology, Faculty of Science, Kyushu University, Fukuoka.

    Abstract

    Structural studies on a hereditary abnormal fibrinogen, fibrinogen Nagoya (Takamatsu, J., Ogata, K., Kamiya, T., Koie, K., Takagi, T., & Iwanaga, S. (1979) Thromb. Haemost. 42, 78), were performed to identify the abnormality responsible for the impaired polymerization of fibrin monomer. Upon sodium dodecyl sulfate-polyacrylamide gel electrophoresis under reducing conditions, fibrinogen Nagoya showed the presence of an extra protein band with an apparent molecular weight of 49,500 in addition to the normal three subunit chains. Amino acid sequence analysis of a peptide isolated from a lysyl endopeptidase digest of one of the CNBr fragments derived from fibrinogen Nagoya indicated that Gln-329 in the gamma-chain had been replaced by Arg. This substitution can be explained by a single nucleotide change in the codon for Gln-329 (CAG----CGG). We conclude that Gln-329 in the gamma-chain is indispensable for the normal polymerization of fibrin monomer.

    PMID:
    2738036
    [PubMed - indexed for MEDLINE]
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