[Relationship between the magnitude of Km and pH for L-asparaginase].
The dependency of L-asparagine hydrolysis rate on L-asparagine concentration in the presence of L-asparaginases from E. coli and Erw. carotovora is studied in a broad pH range. Km values are calculated from the data obtained. It is found that Km insignificantly depends on pH value with the pH range of 5-9 for both asparaginases. Sharp Km maximum is observed at pH greater than 9 in both cases. The maximum position does not coinside with enzyme isoelectric points and with the region of the substrate transition from zwitterionic form into anionic one.
D001215:Asparaginase; D002384:Catalysis; D004885:Erwinia / Q000201:enzymology*; D004926:Escherichia coli / Q000201:enzymology*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics
D001215:Asparaginase
Zavisimost' velichiny Km ot pH dlia L-asaraginazy