Table 5Type II DNA methyltransferase activity in 19 H. pylori strainsa

Prototype% Strains demonstrating methyltransferase activityb
M.AvaI100
M.BglI100
M.CviRI26
M.DdeI32
M.FokI16
M.HaeIII21
M.HinfI74
M.HpaI89
M.Hpy178III89
M.Hpy188I16
M.MboI97
M.MboII42
M.NlaIII100
M.PstI100
M.SacI100
M.TaqI68
a

Strains examined: HPK5, 84–183, 60190, J188, 97–762, Jp6, Jp21, Jp25, Jp26, Jp28, B146, B148, A101, 88–29, 26695, J99, 88–22, J166, J178.

b

Presence of enzyme activity was inferred from the resistance of genomic DNA to digestion by the cognate restriction endonuclease (5).

From: Chapter 24, Restriction and Modification Systems

Cover of Helicobacter pylori
Helicobacter pylori: Physiology and Genetics.
Mobley HLT, Mendz GL, Hazell SL, editors.
Washington (DC): ASM Press; 2001.
Copyright © 2001, ASM Press.

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