Chemical modification of the recombinant human αA- and β-interferons

Sergey I. Borukhov, Alexander Ya Strongin

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4 Scopus citations


Chemical modification has been used to map the residues essential for the antiviral activity of the recombinant human αA- and β-interferons. Modification of His residues with diethylpyrocarbonate and Nα-tosyl-L-lysyl chloromethylketone does not inhibit both interferons, whereas Nα-tosyl-L-phenylalanyl chloromethylketone significantly suppressing the activity of β-interferon does not affect the activity of αA-interferon. After the modification of 1, 2 and 3 Lys residues from 11 ones with 3-(2-pyridyldithio)propionic acid N-hydroxysuccinimide ester αA-interferon reveals 100%, 50% and 10% of the initial activity, respectively. Modification of Trp residues with H2O2, 2-nitrobenzenesulfenyl chloride or 2-hydroxy-5-nitrobenzylbromide inactivates αA- and β-interferons completely. Presumably Trp residue(s) is essential for the antiviral activity of α- and β-interferons.

Original languageEnglish (US)
Pages (from-to)74-80
Number of pages7
JournalBiochemical and Biophysical Research Communications
Issue number1
StatePublished - Feb 28 1990
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology


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