Localization of phospholipid-binding sites of caldesmon

Natalia V. Bogatcheva, Pia A.J. Huber, Iain D.C. Fraser, Steven B. Marston, Nikolai B. Gusev

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

The interaction of phosphatidylserine with intact smooth muscle caldesmon and caldesmon fragments obtained by bacterial expression was investigated by means of light scattering. Among these fragments only those derived from the C-terminal part of caldesmon (so-called domain 4) were able to interact with phospholipids. Fragments 606C (residues 606-756), H7 (566-710) and H2 (626-710) form tight complexes with phosphatidylserine, whereas fragments H8 (658-737), H9 (669-737) and fragment H4 (566-624) interact with phospholipids less effectively. It is concluded that the phospholipid-binding site is located in the sequence 626-710 of caldesmon. This sequence contains calmodulin-binding sites and serine residues phosphorylated by protein kinase C and pro-directed protein kinases. This could explain the effects of calmodulin and phosphorylation on the caldesmon-phospholipid interaction described earlier.

Original languageEnglish (US)
Pages (from-to)176-180
Number of pages5
JournalFEBS Letters
Volume342
Issue number2
DOIs
StatePublished - Apr 4 1994

Keywords

  • Caldesmon
  • Calmodulin
  • Phosphorylation
  • phospholipid

ASJC Scopus subject areas

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

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  • Cite this

    Bogatcheva, N. V., Huber, P. A. J., Fraser, I. D. C., Marston, S. B., & Gusev, N. B. (1994). Localization of phospholipid-binding sites of caldesmon. FEBS Letters, 342(2), 176-180. https://doi.org/10.1016/0014-5793(94)80495-8