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Tyrosine ammonia lyase (EC 4.3.1.23, L-tyrosine ammonia-lyase, TAL or Tyrase) is an enzyme in the 
+
www.hhmi.org
EC 4.3.1 Hydroxycinnamic acids metabolism {{enzyme-stub
natural phenol
In biochemistry, naturally occurring phenols are natural products containing at least one phenol functional group. Phenolic compounds are produced by plants and microorganisms. Organisms sometimes synthesize phenolic compounds in response to eco ...
s biosynthesis pathway. It transforms L-tyrosine
-Tyrosine or tyrosine (symbol Tyr or Y) or 4-hydroxyphenylalanine is one of the 20 standard amino acids that are used by cells to synthesize proteins. It is a non-essential amino acid with a polar side group. The word "tyrosine" is from the Gr ...
into ''p''-coumaric acid.
: + Ammonia
Ammonia is an inorganic compound of nitrogen and hydrogen with the formula . A stable binary hydride, and the simplest pnictogen hydride, ammonia is a colourless gas with a distinct pungent smell. Biologically, it is a common nitrogenous was ...
+ H+
L-tyrosine = ''trans-p''-hydroxycinnamate + NH3
See also
* EC 4.3.1.24 (phenylalanine ammonia-lyase
The enzyme phenylalanine ammonia lyase (EC 4.3.1.24) catalyzes the conversion of L-phenylalanine to ammonia and ''trans''-cinnamic acid.:
:L-phenylalanine = ''trans''-cinnamate + NH3
Phenylalanine ammonia lyase (PAL) is the first and committed ...
)
* EC 4.3.1.25 (phenylalanine/tyrosine ammonia-lyase
Phenylalanine/tyrosine ammonia-lyase (EC 4.3.1.25, PTAL, bifunctional PAL) is an enzyme with systematic name L-phenylalanine(or L-tyrosine):''trans''-cinnamate(or ''trans-p''-hydroxycinnamate) ammonia-lyase. This enzyme catalyses the following che ...
)
References
External links
*www.hhmi.org
EC 4.3.1 Hydroxycinnamic acids metabolism {{enzyme-stub