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threonine Definition

threo·nine (t̸hrē′ə nēn′, -nin)

noun

an essential amino acid, CHCH(OH)CH(NH)COOH, obtained from the hydrolysis of many proteins

Etymology: prob. < threon(ic acid) + -ine

threonine Usage Examples

Adjective modifier

n-terminal: A conserved N-terminal threonine is involved in catalysis at each active site.

Modifies a noun

  • residue: The kinase phosphorylates the CDKs on a threonine residue which lies within the activation segment, a modification essential for generating kinase activity.
  • dehydratase: This enzyme is believed to be involved in the biosynthesis of isoleucine in methanogens and possibly other species lacking threonine dehydratase.
  • kinase: CKI represents a unique group of serine / threonine protein kinases that is ubiquitously expressed in eukaryotic organisms.
  • metabolism: In this particular exercise we want to find all genes involved in the widest sense in the threonine metabolism.

Preposition: in

segment: Plks have a threonine in the activation segment whose phosphorylation is essential for activity.