Biochemistry (Moscow)

, Volume 80, Issue 2, pp 172–179 | Cite as

Effect of chaperonin encoded by gene 146 on thermal aggregation of lytic proteins of bacteriophage EL Pseudomonas aeruginosa

  • P. I. SemenyukEmail author
  • V. N. Orlov
  • L. P. Kurochkina


Investigation of the chaperonin encoded by gene 146 of bacteriophage EL Pseudomonas aeruginosa that we characterized earlier has been continued. To reveal the mechanism of its functioning, new recombinant substrate proteins, fragments of gene product (gp) 183 containing the lysozyme domain were prepared. Their interaction with gp146 was studied. The influence of the phage chaperonin on the thermal aggregation of one of these gp183 fragments and endolysin (gp188) was investigated in both the presence and the absence of ATP by dynamic light scattering. In the absence of ATP, the phage chaperonin forms stable complexes with substrate proteins, thereby protecting them against thermal aggregation. Experimental data obtained for different substrate proteins are analyzed.

Key words

phage chaperonin bacteriophage EL endolysin protein aggregation 



dynamic light scattering


differential scanning calorimetry


gene product


isothermal titration calorimetry


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Copyright information

© Pleiades Publishing, Ltd. 2015

Authors and Affiliations

  • P. I. Semenyuk
    • 1
    Email author
  • V. N. Orlov
    • 1
  • L. P. Kurochkina
    • 1
    • 2
  1. 1.Lomonosov Moscow State UniversityBelozersky Institute of Physico-Chemical BiologyMoscowRussia
  2. 2.Shemyakin-Ovchinnikov Institute of Bioorganic ChemistryRussian Academy of SciencesMoscowRussia

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