Annotations: 8UW4

Chains	Accession	Name	Description	Comments	Source
A, B, C, D, E A, B, C, D, E, F, G, H	PF00576	HIUase/Transthyretin family (Transthyretin)	HIUase/Transthyretin family	This family includes transthyretin that is a thyroid hormone-binding protein that transports thyroxine from the bloodstream to the brain. However, most of the sequences listed in this family do not bind thyroid hormones. They are actually enzymes of ...	This family includes transthyretin that is a thyroid hormone-binding protein that transports thyroxine from the bloodstream to the brain. However, most of the sequences listed in this family do not bind thyroid hormones. They are actually enzymes of the purine catabolism that catalyse the conversion of 5-hydroxyisourate (HIU) to OHCU [2,3]. HIU hydrolysis is the original function of the family and is conserved from bacteria to mammals; transthyretins arose by gene duplications in the vertebrate lineage [4]. HIUases are distinguished in the alignment from the conserved C-terminal YRGS sequence.	Domain

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D, E A, B, C, D, E, F, G, H	5-hydroxyisourate hydrolase	hydrolase activity hydroxyisourate hydrolase activity hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in cyclic amides catalytic activity hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds	nucleobase-containing compound metabolic process purine nucleobase metabolic process nucleobase-containing small molecule metabolic process nucleobase metabolic process small molecule metabolic process metabolic process cellular process primary metabolic process purine-containing compound metabolic process	-

Chains	Accession	Name	Type
A, B, C, D, E A, B, C, D, E, F, G, H	IPR023416	Transthyretin/hydroxyisourate hydrolase domain	Domain
A, B, C, D, E A, B, C, D, E, F, G, H	IPR036817	Transthyretin/hydroxyisourate hydrolase domain superfamily	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F, G, H	IPR000895	Transthyretin/hydroxyisourate hydrolase	Family
A, B, C, D, E A, B, C, D, E, F, G, H	IPR014306	Hydroxyisourate hydrolase	Family