NCBI Accession #
NP_001032093.1
NCBI GenBank Nucleotide #
NM_001037016.2
NCBI Official Full Name
transthyretin-like protein
NCBI Official Synonym Symbols
allantoin synthase; ALNS; MCK7.9; MCK7_9; transthyretin-like protein
NCBI Protein Information
transthyretin-like protein
NCBI Summary
Encodes a transthyretin-like S-allantoin synthase protein that catalyzes two steps in the allantoin biosynthesis pathway by acting as a hydroxyisourate hydrolase and a 2-oxo-4-hydroxy-4-carboxy-5-ureidoimidazoline (OHCU) decarboxylase. Two alternatively spliced versions of the transcript give rise to a longer peroxisomally-targeted protein (AT5G58220.1 (called TTL1-)) and a slightly shorter cytoplasmic protein (AT5G58220.3 (called TTL2-)). Both have roughly equivalent enzymatic activity in vitro, but, allantoin biosynthesis is believed to occur in the peroxisome suggesting that the cytosolic form may participate in a different process.
UniProt Synonym Gene Names
OHCU decarboxylase; HIU hydrolase; HIUHase
UniProt Protein Name
Uric acid degradation bifunctional protein TTL
UniProt Synonym Protein Names
Transthyretin-like proteinIncluding the following 2 domains:2-oxo-4-hydroxy-4-carboxy-5-ureidoimidazoline decarboxylase (EC:4.1.1.97); OHCU decarboxylase5-hydroxyisourate hydrolase (EC:3.5.2.17); HIU hydrolase; HIUHase
UniProt Primary Accession #
Q9LVM5
UniProt Secondary Accession #
Q2V2X6; Q2V2X7
UniProt Related Accession #
Q9LVM5
UniProt Comments
Involved in the last two steps of the degradation of uric acid, i.e. the hydrolysis of 5-hydroxyisourate (HIU) to 2-oxo-4-hydroxy-4-carboxy-5-ureidoimidazoline (OHCU) and its stereoselective decarboxylation to (S)-allantoin. Might function as a negative regulator to modulate brassinosteroid-mediated plant growth.