Báo cáo khoa học: The catalytic role of the distal site asparagine-histidine couple in catalase-peroxidases
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Catalase-peroxidases (KatGs) are unique in exhibiting an overwhelming catalase activity and a peroxidase activity of broad specificity. Similar to other peroxidases the distal histidine inKatGs forms a hydrogen bond with an adjacent conserved asparagine. To investigate the catalytic role(s) of this potential hydrogen bond in the bifunctional activity of KatGs, Asn153 inSynechocystisKatG was replaced with either Ala (Asn153fiAla) or Asp (Asn153fiAsp).
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