Annotations: 3QVA

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d3qvab1	All beta proteins	Prealbumin-like	Transthyretin (synonym: prealbumin)	automated matches	automated matches	(Klebsiella pneumoniae subsp. pneumoniae MGH 78578 ) [TaxId: 272620 ],	SCOPe (2.08)
B	d3qvab2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Klebsiella pneumoniae subsp. pneumoniae MGH 78578 ) [TaxId: 272620 ],	SCOPe (2.08)
C	d3qvac_	All beta proteins	Prealbumin-like	Transthyretin (synonym: prealbumin)	automated matches	automated matches	(Klebsiella pneumoniae subsp. pneumoniae MGH 78578 ) [TaxId: 272620 ],	SCOPe (2.08)
D	d3qvad_	All beta proteins	Prealbumin-like	Transthyretin (synonym: prealbumin)	automated matches	automated matches	(Klebsiella pneumoniae subsp. pneumoniae MGH 78578 ) [TaxId: 272620 ],	SCOPe (2.08)
A	d3qvaa1	All beta proteins	Prealbumin-like	Transthyretin (synonym: prealbumin)	automated matches	automated matches	(Klebsiella pneumoniae subsp. pneumoniae MGH 78578 ) [TaxId: 272620 ],	SCOPe (2.08)
A	d3qvaa2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Klebsiella pneumoniae subsp. pneumoniae MGH 78578 ) [TaxId: 272620 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	Transthyretin	e3qvaB1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Prealbumin-like	F: Transthyretin	ECOD (1.6)
C	Transthyretin	e3qvaC1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Prealbumin-like	F: Transthyretin	ECOD (1.6)
D	Transthyretin	e3qvaD1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Prealbumin-like	F: Transthyretin	ECOD (1.6)
A	Transthyretin	e3qvaA1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Prealbumin-like	F: Transthyretin	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	2.60.40.180	Mainly Beta	Sandwich	Immunoglobulin-like	Transthyretin/hydroxyisourate hydrolase domain	CATH (4.3.0)
C	2.60.40.180	Mainly Beta	Sandwich	Immunoglobulin-like	Transthyretin/hydroxyisourate hydrolase domain	CATH (4.3.0)
D	2.60.40.180	Mainly Beta	Sandwich	Immunoglobulin-like	Transthyretin/hydroxyisourate hydrolase domain	CATH (4.3.0)
A	2.60.40.180	Mainly Beta	Sandwich	Immunoglobulin-like	Transthyretin/hydroxyisourate hydrolase domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	Transthyretin-like protein	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	organonitrogen compound metabolic process purine nucleobase metabolic process primary metabolic process purine-containing compound metabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process nucleobase-containing small molecule metabolic process nucleobase metabolic process small molecule metabolic process metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR023416	Transthyretin/hydroxyisourate hydrolase domain	Domain
A, B, C, D	IPR036817	Transthyretin/hydroxyisourate hydrolase domain superfamily	Homologous Superfamily
A, B, C, D	IPR023418	Transthyretin, thyroxine binding site	Binding Site
A, B, C, D	IPR014306	Hydroxyisourate hydrolase	Family

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.