Protein Family Models

This is the N-terminal 50 amino acids of a group of bacterial proteins annotated as fumarylacetoacetate hydrolase-containing enzymes, including Rv2993c from Mycobacterium tuberculosis. In most cases members are associated with FAA_hydrolase Pfam:PF01557 further towards the C-terminus. [1]. 8223600. Purification, nucleotide sequence and some properties of a bifunctional isomerase/decarboxylase from the homoprotocatechuate degradative pathway of Escherichia coli C. Roper DI, Cooper RA;. Eur J Biochem 1993;217:575-580. (from Pfam)

Date:

2024-10-16

This family consists of fumarylacetoacetate (FAA) hydrolase, or fumarylacetoacetate hydrolase (FAH) and it also includes HHDD isomerase/OPET decarboxylase from E. coli strain W. FAA is the last enzyme in the tyrosine catabolic pathway, it hydrolyses fumarylacetoacetate into fumarate and acetoacetate which then join the citric acid cycle [1]. Mutations in FAA cause type I tyrosinemia in humans this is an inherited disorder mainly affecting the liver leading to liver cirrhosis, hepatocellular carcinoma, renal tubular damages and neurologic crises amongst other symptoms [1]. The enzymatic defect causes the toxic accumulation of phenylalanine/tyrosine catabolites [3]. The E. coli W enzyme HHDD isomerase/OPET decarboxylase contains two copies of this domain and functions in fourth and fifth steps of the homoprotocatechuate pathway; here it decarboxylates OPET to HHDD and isomerises this to OHED. The final products of this pathway are pyruvic acid and succinic semialdehyde. This family also includes various hydratases and 4-oxalocrotonate decarboxylases which are involved in the bacterial meta-cleavage pathways for degradation of aromatic compounds. 2-hydroxypentadienoic acid hydratase encoded by mhpD in E. coli Swiss:P77608 is involved in the phenylpropionic acid pathway of E. coli and catalyses the conversion of 2-hydroxy pentadienoate to 4-hydroxy-2-keto-pentanoate and uses a Mn2+ co-factor [5]. OHED hydratase encoded by hpcG in E. coli Swiss:P42270 is involved in the homoprotocatechuic acid (HPC) catabolism [6]. XylI in P. putida Swiss:P49155 is a 4-Oxalocrotonate decarboxylase [7]. [1]. 9101289. Mutations in th. TRUNCATED at 1650 bytes (from Pfam)

Date:

2024-08-14

fumarylacetoacetate (FAA) hydrolase family protein belongs to the FAA hydrolase family which includes a large variety of metabolic enzymes, including those with hydrolase functions involved in the breakdown of aromatic compounds, oxaloacetate decarboxylase, and enzymes associated with other catabolic pathways including decarboxylation of substrates other than oxaloacetate, hydration, isomerization and hydroxylation reactions; contains an N-terminal DUF2437 domain

Date:

2022-07-28