Methylaspartate ammonia-lyase

UniProtKB accession:  Q05514

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UniProtKB description:  Involved in the methylaspartate cycle. Catalyzes the formation of the alpha,beta-unsaturated bond by the reversible anti elimination of ammonia from L-threo-beta-methylaspartate (L-threo-(2S,3S)-3-methylaspartate) to give mesaconate. It can also use L-erythro-beta-methylaspartate (L-erythro-(2S,3R)-3-methylaspartate), L-aspartate, fumarate and ethylfumarate as substrates.