8THE | pdb_00008the

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C [auth L]	BRCT_2	e8theL01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: BRCT_2	ECOD (v294.2)
B [auth H]	BRCT_2	e8theH01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: BRCT_2	ECOD (v294.2)
A	BRCT_2	e8theA01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: BRCT_2	ECOD (v294.2)

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth L]	Light Chain	IGKV1	Kappa	heme/hemoglobin uptake outer membrane receptor phur	SAbDab (2026-05-08)
B [auth H]	Heavy Chain	IGHV3	-	heme/hemoglobin uptake outer membrane receptor phur	SAbDab (2026-05-08)

Chains	Accession	Name	Description	Comments	Source
A	PF00593	TonB dependent receptor-like, beta-barrel (TonB_dep_Rec_b-barrel)	TonB dependent receptor-like, beta-barrel	This entry represents the beta-barrel domain of TonB-dependent receptors, such as BtuB, CirA, FatA, FcuT, FecA, FepA, among others [1].	Domain

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth L]	Synthetic Antibody Light Chain	-	-	-
B [auth H]	Synthetic Antibody Heavy Chain	-	-	-
A	Heme/hemoglobin uptake outer membrane receptor PhuR	heme transmembrane transporter activity transporter activity transmembrane transporter activity siderophore-iron transmembrane transporter activity iron chelate transmembrane transporter activity siderophore uptake transmembrane transporter activity	nitrogen compound transport transport iron ion transport establishment of localization metal ion transport localization heme transport transition metal ion transport monoatomic ion transport monoatomic cation transport iron coordination entity transport siderophore transport siderophore transmembrane transport cellular response to stimulus nitrogen compound transport transport iron ion transport establishment of localization metal ion transport localization heme transport transition metal ion transport monoatomic ion transport monoatomic cation transport iron coordination entity transport siderophore transport siderophore transmembrane transport cellular response to stimulus cellular response to iron ion cellular response to metal ion cellular response to chemical stimulus response to stimulus response to metal ion response to iron ion response to chemical cellular process	cellular anatomical structure membrane outer membrane cell outer membrane external encapsulating structure extracellular region cell envelope

Chains	Accession	Name	Type
A	IPR039426	TonB-dependent receptor-like	Family
A	IPR037066	TonB-dependent receptor, plug domain superfamily	Homologous Superfamily
A	IPR010949	TonB-dependent haemoglobin/transferrin/lactoferrin receptor	Family
A	IPR011276	TonB-dependent haem/haemoglobin receptor	Family
A	IPR036942	TonB-dependent receptor-like, beta-barrel domain superfamily	Homologous Superfamily
A	IPR012910	TonB-dependent receptor, plug domain	Domain
A	IPR000531	TonB-dependent receptor-like, beta-barrel	Domain

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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.