On the peptide-antipeptide interactions in interleukin-1 receptor system

Alicja Kluczyk, Marek Cebrat, Renata Zbozień-Pacamaj, Marek Lisowski, Piotr Stefanowicz, Zbigniew Wieczorek, Ignacy Z. Siemion

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Interleukin-1 receptor antagonist (IL-1Ra) and vaccinia virus protein C10L share a VTXFYF motif, with X being Lys or Arg residue, respectively. Peptides of such sequence compete successfully with IL-1 for the cellular receptor. A pair of complementary peptides, based on the Siemion's hypothesis on the periodicity of the genetic code (QWLNIN and QWANIN), and another pair, in which, following the Root-Bernstein theory, Lys was used as complementary amino acid to Phe (QWLKIK and QWAKIK), were investigated for the peptide-antipeptide interactions using mass spectrometry (ESI-MS) and circular dichroism (CD) methods. The CD measurements indicated some conformational changes, more pronounced in the Siemion's pairs, however, no heterodimer formation was found by MS. In the region of IL-1 receptor situated close to the position of IL-1Ra in the IL-1Ra-receptor complex, a KQKL motif is present, suggesting a possibility of complementary recognition of the Root-Bernstein type in the IL-1 receptor. The biological activity of the complementary peptides is similar to that of the original ones. They efficiently compete with IL-1 and show moderate immunosuppressory activity in humoral and cellular immune response. The inhibition of the IL-1-IL-1 receptor interaction may result from the complementary peptides acting as mini-receptors with affinity for IL-1.

Original languageEnglish (US)
Pages (from-to)57-66
Number of pages10
JournalActa Biochimica Polonica
Issue number1
StatePublished - 2004
Externally publishedYes


  • Complementary peptides
  • Immunomodulation
  • Interleukin-1
  • Interleukin-1 receptor antagonist
  • Vaccinia virus C10L protein

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology
  • Biochemistry


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