Tyrosine: Difference between revisions
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imported>David E. Volk (stub and structure) |
imported>David E. Volk (synthesis pict) |
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'''Tyrosine''', abbreviated '''Tyr''' or '''Y''', is one of the twenty common <math>\alpha</math>-[[amino acid]]s used by living organisms to build [[protein]]s. It is one of the four [[aromatic]] amino acids together with [[histidine]], [[phenylalanine]] and [[tryptophan]]. It is one of three amino acids subject to [[phosphorylation]] by tyrosine [[kinase]]s due to the presence of a hydroxyl group, (-OH). Such phosphorylation events are central to many [[cell-signalling]] pathways. Although tyrosine is [[hydrophobic]] and the side chain is mostly buried in proteins, it is often situated such that the hydroxy group is accessible. | '''Tyrosine''', abbreviated '''Tyr''' or '''Y''', is one of the twenty common <math>\alpha</math>-[[amino acid]]s used by living organisms to build [[protein]]s. It is one of the four [[aromatic]] amino acids together with [[histidine]], [[phenylalanine]] and [[tryptophan]]. It is one of three amino acids subject to [[phosphorylation]] by tyrosine [[kinase]]s due to the presence of a hydroxyl group, (-OH). Such phosphorylation events are central to many [[cell-signalling]] pathways. Although tyrosine is [[hydrophobic]] and the side chain is mostly buried in proteins, it is often situated such that the hydroxy group is accessible. | ||
== biosynthesis == | |||
[[Image:Tryosine synthesis.jpg|right|thumb|350px|{{#ifexist:Template:Tryosine synthesis.jpg/credit|{{Tryosine synthesis.jpg/credit}}<br/>|}}Bacterial biosynthesis of tyrosine from chorismate.]] | |||
Revision as of 14:15, 21 January 2008
Tyrosine, abbreviated Tyr or Y, is one of the twenty common -amino acids used by living organisms to build proteins. It is one of the four aromatic amino acids together with histidine, phenylalanine and tryptophan. It is one of three amino acids subject to phosphorylation by tyrosine kinases due to the presence of a hydroxyl group, (-OH). Such phosphorylation events are central to many cell-signalling pathways. Although tyrosine is hydrophobic and the side chain is mostly buried in proteins, it is often situated such that the hydroxy group is accessible.
