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A3 domain region 1803-1818 contributes to the stability of activated factor VIII and includes a binding site for activated factor IX

  • Esther Bloem
  • , Henriet Meems
  • , Maartje Van Den Biggelaar
  • , Koen Mertens
  • , Alexander B. Meijer*
  • *Corresponding author for this work
  • Sanquin Blood Supply Foundation
  • Utrecht University

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Background: Factor VIII (FVIII) region 1803-1818 may bind activated factor IX (FIXa) or contribute to the stability of activated factor VIII (FVIIIa). Results: Replacing 1803-1810 or 1811-1818 with the homologous regions of factor V decreases FVIIIa stability. FVIII variant F1816A exhibits reduced FIXa binding and FVIIIa stability. Conclusion: FVIII region 1803-1818 is critical for cofactor function. Significance: Novel insight is obtained about FVIII cofactor function.

Original languageEnglish
Pages (from-to)26105-26111
Number of pages7
JournalJournal of biological chemistry
Volume288
Issue number36
DOIs
Publication statusPublished - 6 Sept 2013
Externally publishedYes

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