page_title: Acetolactate synthase
hierarchical_section_title: Acetolactate synthase
caption_attribution_description: English: Acetolactase Synthase
context_page_description: The acetolactate synthase enzyme is a protein found in plants and micro-organisms. ALS catalyzes the first step in the synthesis of the branched-chain amino acids.
  A human protein of yet unknown function, sharing some sequence similarity with bacterial ALS, is encoded by the ILVBL gene.
context_section_description: The acetolactate synthase (ALS) enzyme (also known as acetohydroxy acid synthase, or AHAS) is a protein found in plants and micro-organisms.  ALS catalyzes the first step in the synthesis of the branched-chain amino acids (valine, leucine, and isoleucine).
  A human protein of yet unknown function, sharing some sequence similarity with bacterial ALS, is encoded by the ILVBL (ilvB-like) gene.
caption: Crystal structure of Arabidopsis thaliana acetohydroxyacid synthase complexed with a sulfonylurea herbicide, metsulfuron-methyl.[1]
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