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[Substrate specificity of restriction endonuclease Eco781].

Viktoras Butkus, R Kazlauskene, R. Gilvonauskaité, M Piatrushite, A A Ianulaĭtis

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Abstract

The recognition sequence and cleavage point of restriction endonuclease Eco781 have been determined as 5'-GGCGCC-. There are several known enzymes recognizing the same sequence, although the prototype NarI and isoschizomers NdaI and NunII cleave the substrate to produce 5'-protruding ends, whereas cleavage with isoschizomer BbeI results in 3'-protruding ends. Therefore, restrictase Eco78I, generating flush ends, may be regarded as an enzyme with new specificity among the restriction endonucleases recognizing the 5'-GGCGCC-sequence.

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What this paper is about

The recognition sequence and cleavage point of restriction endonuclease Eco781 have been determined as 5'-GGCGCC-. There are several known enzymes recognizing the same sequence, although the prototype NarI and isoschizomers NdaI and NunII cleave the substrate to produce 5'-protruding ends, whereas cleavage with isoschizomer BbeI results in 3'-protruding ends. Therefore, restrictase Eco78I, generating flush ends, may be regarded as an enzyme with new specificity among the restriction endonucleases recognizing the 5'-GGCGCC-sequence.

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Available abstract

The recognition sequence and cleavage point of restriction endonuclease Eco781 have been determined as 5'-GGCGCC-. There are several known enzymes recognizing the same sequence, although the prototype NarI and isoschizomers NdaI and NunII cleave the substrate to produce 5'-protruding ends, whereas cleavage with isoschizomer BbeI results in 3'-protruding ends. Therefore, restrictase Eco78I, generating flush ends, may be regarded as an enzyme with new specificity among the restriction endonucleases recognizing the 5'-GGCGCC-sequence.

Key concepts: Isoschizomer, Restriction enzyme, Cleave, Recognition sequence, Cleavage (geology), Endonuclease, Chemistry, Substrate specificity

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