Annotations: 9HX3

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
E [auth D]	SCOP2B Superfamily	Transthyretin (synonym: prealbumin)	8040289	3000848	SCOP2B (2022-06-29)
D [auth E]	SCOP2B Superfamily	Transthyretin (synonym: prealbumin)	8040289	3000848	SCOP2B (2022-06-29)
C [auth B]	SCOP2B Superfamily	Transthyretin (synonym: prealbumin)	8040289	3000848	SCOP2B (2022-06-29)
B [auth C]	SCOP2B Superfamily	Transthyretin (synonym: prealbumin)	8040289	3000848	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Transthyretin (synonym: prealbumin)	8040289	3000848	SCOP2B (2022-06-29)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B [auth C], C [auth B], D [auth E], E [auth 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 [auth C], C [auth B], D [auth E], E [auth D]	Transthyretin	hormone activity protein binding binding molecular function activator activity signaling receptor binding molecular function regulator activity signaling receptor regulator activity receptor ligand activity signaling receptor activator activity protein-containing complex binding molecular sequestering activity hormone binding identical protein binding	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 detection of light stimulus response to light stimulus phototransduction cellular response to stimulus detection of external stimulus 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 detection of light stimulus response to light stimulus phototransduction cellular response to stimulus detection of external stimulus regulation of biological process regulation of cellular process response to stimulus signaling biological regulation detection of visible light response to external stimulus detection of abiotic stimulus cell communication detection of stimulus response to abiotic stimulus response to radiation signal transduction phototransduction, visible light diterpenoid metabolic process retinoid metabolic process terpenoid metabolic process isoprenoid metabolic process lipid metabolic process multicellular organismal process regulation of body fluid levels system process renal system process regulation of renal system process regulation of blood pressure regulation of system process negative regulation of biological process negative regulation of glomerular filtration regulation of glomerular filtration regulation of systemic arterial blood pressure circulatory system process renal system process involved in regulation of blood volume regulation of multicellular organismal process renal system process involved in regulation of systemic arterial blood pressure regulation of biological quality negative regulation of multicellular organismal process glomerular filtration blood circulation renal filtration	cellular anatomical structure extracellular region extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle organelle extracellular space vesicle extracellular membrane-bounded organelle intracellular anatomical structure lytic vacuole intracellular vesicle membrane-enclosed lumen cellular anatomical structure extracellular region extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle organelle extracellular space vesicle extracellular membrane-bounded organelle intracellular anatomical structure lytic vacuole intracellular vesicle membrane-enclosed lumen cytoplasmic vesicle lumen vacuolar lumen endomembrane system intracellular organelle lumen intracellular organelle cytoplasmic vesicle lysosome vesicle lumen azurophil granule vacuole intracellular membrane-bounded organelle secretory granule lumen azurophil granule lumen organelle lumen secretory granule primary lysosome secretory vesicle cytoplasm protein-containing complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B [auth C], C [auth B], D [auth E], E [auth D]	IPR036817	Transthyretin/hydroxyisourate hydrolase domain superfamily	Homologous Superfamily
A, B [auth C], C [auth B], D [auth E], E [auth D]	IPR023418	Transthyretin, thyroxine binding site	Binding Site
A, B [auth C], C [auth B], D [auth E], E [auth D]	IPR023419	Transthyretin, conserved site	Conserved Site
A, B [auth C], C [auth B], D [auth E], E [auth D]	IPR023416	Transthyretin/hydroxyisourate hydrolase domain	Domain
A, B [auth C], C [auth B], D [auth E], E [auth D]	IPR000895	Transthyretin/hydroxyisourate hydrolase	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B [auth C], C [auth B], D [auth E], E [auth D]	Pharos: P02766	amyloidosis familial amyloid neuropathy carpal tunnel syndrome hyperthyroxinemia, dystransthyretinemic lattice corneal dystrophy peripheral neuropathy Transthyretin related familial amyloid cardiomyopathy carpal tunnel syndrome 1 diabetes mellitus pancreatic intraductal papillary-mucinous carcinoma peripheral nervous system disease drug-induced liver injury Riley-Day syndrome acquired metabolic disease hydrocephalus amyloidosis familial amyloid neuropathy carpal tunnel syndrome hyperthyroxinemia, dystransthyretinemic lattice corneal dystrophy peripheral neuropathy Transthyretin related familial amyloid cardiomyopathy carpal tunnel syndrome 1 diabetes mellitus pancreatic intraductal papillary-mucinous carcinoma peripheral nervous system disease drug-induced liver injury Riley-Day syndrome acquired metabolic disease hydrocephalus intellectual disability Charcot-Marie-Tooth disease medulloblastoma osteosarcoma dilated cardiomyopathy pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia psoriasis schizophrenia acute kidney failure kidney disease lung benign neoplasm lymphatic system disease depressive disorder periodic fever syndrome polyneuropathy rheumatoid arthritis Sjogren syndrome heart disease hereditary amyloidosis hypertrophic cardiomyopathy lung carcinoma

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), 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 R01GM157729.