Protein Information

Name maleylacetoacetate isomerase
Synonyms GSTZ 1; GSTZ1; GSTZ1 protein; GSTZ1 1; Glutathione S transferase Z1; Glutathione S transferase zeta 1; Glutathione transferase zeta 1 variant; Glutathione transferase zeta 1(maleylacetoacetate isomerase)…

Compound Information

Name MAA
CAS methylarsonic acid

Reference List

PubMed Abstract RScore(About this table)
12052898 Fernandez-Canon JM, Baetscher MW, Finegold M, Burlingame T, Gibson KM, Grompe M: Maleylacetoacetate isomerase (MAAI/GSTZ)-deficient mice reveal a glutathione-dependent nonenzymatic bypass in tyrosine catabolism. Mol Cell Biol. 2002 Jul;22(13):4943-51.

11(0,0,0,11) Details
11692075 Blackburn AC, Coggan M, Tzeng HF, Lantum H, Polekhina G, Parker MW, Anders MW, Board PG: GSTZ1d: a new allele of glutathione transferase zeta and maleylacetoacetate isomerase. Pharmacogenetics. 2001 Nov;11(8):671-8.

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12730618 Lantum HB, Cornejo J, Pierce RH, Anders MW: Perturbation of maleylacetoacetic acid metabolism in rats with dichloroacetic Acid-induced glutathione transferase zeta deficiency. Toxicol Sci. 2003 Jul;74(1):192-202. Epub 2003 May 2.


Glutathione transferase zeta (GSTZ1-1) catalyzes the isomerization of maleylacetoacetate (MAA) to fumarylacetoacetate, the penultimate step in the tyrosine degradation pathway.
4(0,0,0,4) Details
10471397 Cornett R, James MO, Henderson GN, Cheung J, Shroads AL, Stacpoole PW: Inhibition of glutathione S-transferase zeta and tyrosine metabolism by dichloroacetate: a potential unifying mechanism for its altered biotransformation and toxicity. Biochem Biophys Res Commun. 1999 Sep 7;262(3):752-6.


GSTz is identical to maleylacetoacetate isomerase, an enzyme of tyrosine catabolism that converts maleylacetoacetate (MAA) to fumarylacetoacetate and maleylacetone (MA) to fumarylacetone.
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