Abstract
A hyaluronic acid splitting enzyme of Streptococcus agalactiae was characterized by splitting mechanism, Michaelis-constant and inhibition type for sulfated hyaluronic acid: The enzyme splits hyaluronic acid as a hyaluronate lyase [EC 4.2.2.1]. The Km = 8 x 10(-4) mg ml-1 was determined with the influence of substrate inhibition constant Kiu = 2 x 10(-6) mg ml-1. Sulfated hyaluronic acid inhibits the enzyme in a partially non-competitive way. The inhibition constant is Ki = 5.47 x 10(-4) mg ml-1. The GBS-hyaluronate lyase cleaves hyaluronic acid as an endoglycosidase. The work is related with the intention to establish a hyaluronate lyase of microbial origin as a therapeutical enzyme replacing bovine hyaluronidase.
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