Replacement of the Y450 (c234) phenyl ring in the carboxyl-terminal region of coagulation factor IX causes pleiotropic effects on secretion and enzyme activity

Alessio Branchini, Matteo Campioni, Maria Gabriella Mazzucconi, Francesca Biondo, Rosella Mari, Maria Patrizia Bicocchi, Francesco Bernardi, Mirko Pinotti

Research output: Contribution to journalArticlepeer-review

Abstract

The interplay between impaired protein biosynthesis and/or function caused by missense mutations, particularly in relation to specific protein regions, has been poorly investigated. As model we chose the severe p.Y450C mutation in the carboxyl-terminal region of coagulation factor IX (FIX) and, by expression of a panel of recombinant variants, demonstrated the key role of the tyrosine phenyl group for both FIX secretion and coagulant activity. Comparison among highly homologous coagulation serine proteases indicate that additive or compensatory pleiotropic effects on secretion and function by carboxyl-terminal mutations produce life-threatening or mild phenotypes in the presence of similarly reduced protein amounts.

Original languageEnglish
Pages (from-to)3249-3253
Number of pages5
JournalFEBS Letters
Volume587
Issue number19
DOIs
Publication statusPublished - Oct 1 2013

Keywords

  • Carboxyl-terminal region
  • Coagulation factor IX
  • Dysfunctional enzyme
  • Gene expression
  • Impaired secretion
  • Missense mutations

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Cell Biology
  • Genetics
  • Molecular Biology
  • Structural Biology

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