Affinity modification of the restriction endonuclease SsoII by 2′-aldehyde-containing double stranded DNAs

A. E. Sud'ina, T. S. Zatsepin, V. Pingoud, A. Pingoud, T. S. Oretskaya, E. A. Kubareva

Результат исследований: Вклад в журналСтатьярецензирование

5 Цитирования (Scopus)

Аннотация

Properties of 2′-aldehyde-containing double stranded DNAs (dsDNAs) have been studied for the first time as substrate analogs of the restriction endonuclease SsoII. These reactive oligonucleotides were successfully cross-linked to the restriction endonuclease SsoII by reductive amination, and conditions for DNA-protein conjugate trypsinolysis followed by the oligonucleotide-peptide conjugate purification were optimized. Use of MALDI-TOF mass spectrometry revealed that covalent linkage forms between the sugar moiety of the central pyrimidine nucleoside of the SsoII recognition site and Lys173 of the enzyme. The latter is probably involved in initial steps of enzyme-substrate recognition during dsDNA readout.

Язык оригиналаАнглийский
Страницы (с-по)941-947
Число страниц7
ЖурналBiochemistry (Moscow)
Том70
Номер выпуска8
DOI
СостояниеОпубликовано - авг. 2005
Опубликовано для внешнего пользованияДа

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