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. 1992 Feb 11;20(3):433–438. doi: 10.1093/nar/20.3.433

Purification and properties of the MboII, a class-IIS restriction endonuclease.

M Sektas 1, T Kaczorowski 1, A J Podhajska 1
PMCID: PMC310404  PMID: 1741276

Abstract

After five purification steps a homogeneous preparation of endonuclease MboII was obtained, and several properties of the enzyme were determined. MboII is a monomer, with Mr under native and denaturing conditions being 47-49 x 10(3) Da. Endonuclease MboII is a basic protein (pI 8.3) which remains active when Mg2+ is replaced by Mn2+, Co2+, Ca2+, or Fe2+. MboII exhibits a star activity in the presence of some of the following reagents or ions: DMSO, glycerol, ethanol (and Co2+ or Mn2+ at pH 6). MboII does not bend DNA and is heat sensitive, losing activity after 15 min at 50 degrees C.

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