Dopamine beta-hydroxylase

Dopamine beta-hydroxylase (DBH), also known as dopamine beta-monooxygenase, is an enzyme that catalyzes the conversion of dopamine to norepinephrine.

Function

DBH is a copper-containing oxygenase that exists as a tetramer with four identical subunits. It is located in the synaptic vesicles of postganglionic sympathetic neurons and in adrenal medulla, where it converts dopamine to norepinephrine. This conversion is a critical step in the sympathetic nervous system's production of norepinephrine, which plays a key role in the body's fight or flight response.

Clinical significance

Mutations in the DBH gene can lead to Dopamine beta hydroxylase deficiency, a condition characterized by a lack of norepinephrine and epinephrine in patients. Symptoms can include orthostatic hypotension, ptosis, and nasal stuffiness.

See also

• Dopamine
• Norepinephrine
• Sympathetic nervous system
• Dopamine beta hydroxylase deficiency

External links

• WikiMD Article on Dopamine beta-hydroxylase

• Dopamine beta-monooxygenase reaction
  Dopamine beta-monooxygenase reaction
• DBH mechanism
  DBH mechanism
• Models for Oligomer Structures of DBH
  Models for Oligomer Structures of DBH