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AHCY

Function

Adenosylhomocysteine is a competitive inhibitor of S-adenosyl-L-methionine-dependent methyl transferase reactions; therefore adenosylhomocysteinase may play a key role in the control of methylations via regulation of the intracellular concentration of adenosylhomocysteine.

Involvement in disease

Hypermethioninemia with S-adenosylhomocysteine hydrolase deficiency

HMAHCHD

A metabolic disorder characterized by hypermethioninemia associated with failure to thrive, mental and motor retardation, facial dysmorphism with abnormal hair and teeth, and myocardiopathy.

None

The disease is caused by variants affecting the gene represented in this entry.

Pathway

Amino-acid biosynthesis; L-homocysteine biosynthesis; L-homocysteine from S-adenosyl-L-homocysteine: step 1/1.

Sequence similarities

Belongs to the adenosylhomocysteinase family.

Cellular localization

  • Cytoplasm
  • Melanosome
  • Identified by mass spectrometry in melanosome fractions from stage I to stage IV.

Alternative names

  • Adenosylhomocysteinase
  • AdoHcyase
  • S-adenosyl-L-homocysteine hydrolase
  • AHCY
  • SAHH

Target type

Proteins

Molecular weight

47716Da