4WEU | pdb_00004weu

Co-complex structure of the F4 fimbrial adhesin FaeG variant ad with llama single domain antibody V3

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
D [auth E]	d4weue_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	Llama (Lama glama ) [TaxId: 9844 ],	SCOPe (2.08)
A [auth D]	d4weud_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	Llama (Lama glama ) [TaxId: 9844 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C [auth B]	Beta-Casp	e4weuB1	A: alpha bundles	X: Glycosyl hydrolase domain-like	H: Glycoside hydrolase family 127 middle domain-related	T: Glycoside hydrolase family 127 middle domain-related	F: Beta-Casp	ECOD (develop294)
B [auth A]	Beta-Casp	e4weuA1	A: alpha bundles	X: Glycosyl hydrolase domain-like	H: Glycoside hydrolase family 127 middle domain-related	T: Glycoside hydrolase family 127 middle domain-related	F: Beta-Casp	ECOD (develop294)
D [auth E]	Beta-Casp	e4weuE1	A: alpha bundles	X: Glycosyl hydrolase domain-like	H: Glycoside hydrolase family 127 middle domain-related	T: Glycoside hydrolase family 127 middle domain-related	F: Beta-Casp	ECOD (develop294)
A [auth D]	Chlor_dismutase	e4weuD1	A: alpha bundles	X: Glycosyl hydrolase domain-like	H: Glycoside hydrolase family 127 middle domain-related	T: Glycoside hydrolase family 127 middle domain-related	F: Chlor_dismutase	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D [auth E]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A [auth D]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
A [auth D], D [auth E]	Anti-F4+ETEC bacteria VHH variable region	VH	Lama glama (llama)	IGHV3S401, IGHJ401	V-DOMAIN VH	IG	(VH)	IMGT (202610-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
A [auth D], D [auth E]	Heavy Chain	IGHV1	-	k88 fimbrial protein ad	SAbDab (2026-03-20)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B [auth A], C [auth B]	K88 fimbrial protein AD	-	cell adhesion cellular process	pilus cell projection cellular anatomical structure
A [auth D], D [auth E]	Anti-F4+ETEC bacteria VHH variable region	-	response to stimulus immune response immune system process adaptive immune response	protein-containing complex immunoglobulin complex cellular anatomical structure extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B [auth A], C [auth B]	IPR003467	K88 fimbrial minor subunit FaeH	Family
A [auth D], D [auth E]	IPR050199	Immunoglobulin Heavy Variable	Family
A [auth D], D [auth E]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A [auth D], D [auth E]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A [auth D], D [auth E]	IPR013106	Immunoglobulin V-set domain	Domain
A [auth D], D [auth E]	IPR003599	Immunoglobulin domain subtype	Domain
A [auth D], D [auth E]	IPR007110	Immunoglobulin-like domain	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.