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Related Experiment Videos

Complete covalent structure of human platelet factor 4.

F J Morgan, G S Begg, C N Chesterman

    Thrombosis and Haemostasis
    |February 29, 1980
    PubMed
    Summary

    The amino acid sequence of human platelet factor 4 (PF4) was determined. This protein comprises 70-amino acid subunits and lacks specific amino acids, with inferred disulfide bonds.

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    Area of Science:

    • Biochemistry
    • Molecular Biology
    • Proteomics

    Background:

    • Human platelet factor 4 (PF4) is a protein released from platelet alpha-granules.
    • PF4 plays roles in inflammation, angiogenesis, and heparin neutralization.
    • Understanding PF4's structure is crucial for elucidating its function.

    Purpose of the Study:

    • To determine the complete amino acid sequence of the human platelet factor 4 (PF4) subunit.
    • To identify key structural features, including amino acid composition and potential disulfide bonds.

    Main Methods:

    • Amino acid sequencing of the PF4 subunit.
    • Comparative analysis with related proteins (e.g., beta-thromboglobulin) to infer structural details.

    Main Results:

    • The complete 70-amino acid sequence of the PF4 subunit was elucidated.
    • PF4 subunits have a molecular weight of 7,756.
    • The protein lacks methionine, phenylalanine, and tryptophan residues.
    • Inferred disulfide bonds are located between residues 10-36 and 12-52, based on homology.

    Conclusions:

    • The primary amino acid sequence of human PF4 has been established.
    • Structural insights, including disulfide bond locations, were gained through sequence analysis and homology.
    • This detailed sequence information provides a foundation for further functional and structural studies of PF4.

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