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N-acetylneuraminate lyase N-acetylneuraminate lyase is also known as N-acetylneuraminic acid aldolase, sialic acid aldolase, or sialate lyase. It is an intracellular enzyme. The structure of this homotetrameric enzyme related to dihydrodipicolinate synthase is known. In Clostridium tertium, the enzyme appears to be in an operon with a secreted sialidase that releases sialic acid from host sialoglycoconjugates. In several E. coli strains, however, this enzyme is responsible for N-acetyl-D-neuraminic acid synthesis for capsule production by condensing N-acetyl-D-mannosamine and pyruvate. [Cell envelope, Biosynthesis and degradation of surface polysaccharides and lipopolysaccharides, Central intermediary metabolism, Amino sugars]
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Jiyao W et al.(2023). "The conserved domain database in 2023.",