Annotations: 6DBG

Crystal Structure of VHH R303 in complex with InlB-LRR-IR

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
SAbDab Antibody Annotation
Protein Family Annotation

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
D	d6dbgd_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Camelus dromedarius ) [TaxId: 9838 ],	SCOPe (2.08)
C	d6dbgc_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Camelus dromedarius ) [TaxId: 9838 ],	SCOPe (2.08)
A	d6dbga2	All beta proteins	Immunoglobulin-like beta-sandwich	E set domains	automated matches	automated matches	(Listeria monocytogenes ) [TaxId: 1639 ],	SCOPe (2.08)
A	d6dbga1	Alpha and beta proteins (a/b)	Leucine-rich repeat, LRR (right-handed beta-alpha superhelix)	L domain-like	Internalin LRR domain	automated matches	(Listeria monocytogenes ) [TaxId: 1639 ],	SCOPe (2.08)
B	d6dbgb2	All beta proteins	Immunoglobulin-like beta-sandwich	E set domains	automated matches	automated matches	(Listeria monocytogenes ) [TaxId: 1639 ],	SCOPe (2.08)
B	d6dbgb1	Alpha and beta proteins (a/b)	Leucine-rich repeat, LRR (right-handed beta-alpha superhelix)	L domain-like	Internalin LRR domain	automated matches	(Listeria monocytogenes ) [TaxId: 1639 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
D	Y_phosphatase	e6dbgD1	A: alpha arrays	X: fingers domain in bacteriophage RB69-like DNA polymerase I	H: fingers domain in bacteriophage RB69-like DNA polymerase I	T: fingers domain in bacteriophage RB69-like DNA polymerase I	F: Y_phosphatase	ECOD (v295.2)
C	Y_phosphatase	e6dbgC1	A: alpha arrays	X: fingers domain in bacteriophage RB69-like DNA polymerase I	H: fingers domain in bacteriophage RB69-like DNA polymerase I	T: fingers domain in bacteriophage RB69-like DNA polymerase I	F: Y_phosphatase	ECOD (v295.2)
A	GalP_UDP_tr_C	e6dbgA1	A: alpha arrays	X: Major facilitator superfamily (MFS) general substrate transporter	H: Major facilitator superfamily (MFS) general substrate transporter	T: Major facilitator superfamily (MFS) general substrate transporter	F: GalP_UDP_tr_C	ECOD (v295.2)
B	Y_phosphatase	e6dbgB1	A: alpha arrays	X: fingers domain in bacteriophage RB69-like DNA polymerase I	H: fingers domain in bacteriophage RB69-like DNA polymerase I	T: fingers domain in bacteriophage RB69-like DNA polymerase I	F: Y_phosphatase	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.80.10.10	Alpha Beta	Alpha-Beta Horseshoe	Leucine-rich repeat, LRR (right-handed beta-alpha superhelix)	Ribonuclease Inhibitor	CATH (4.3.0)
B	3.80.10.10	Alpha Beta	Alpha-Beta Horseshoe	Leucine-rich repeat, LRR (right-handed beta-alpha superhelix)	Ribonuclease Inhibitor	CATH (4.3.0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C, D	Heavy Chain	IGHV1	-	internalin b	SAbDab (2026-10-16)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF12354	Bacterial adhesion/invasion protein N terminal (Internalin_N)	Bacterial adhesion/invasion protein N terminal	This domain family is found in bacteria, and is approximately 60 amino acids in length. The family is found in association with Pfam:PF00560, Pfam:PF08191, Pfam:PF09479. There are two completely conserved residues (I and F) that may be functionally i ...	This domain family is found in bacteria, and is approximately 60 amino acids in length. The family is found in association with Pfam:PF00560, Pfam:PF08191, Pfam:PF09479. There are two completely conserved residues (I and F) that may be functionally important. Internalin mediates bacterial adhesion and invasion of epithelial cells in the human intestine through specific interaction with its host cell receptor E-cadherin. This family is the N terminal of internalin, the cap domain of the protein. The cap domain is conserved between different internalin types. The cap domain does not interact with E cadherin, therefore its function is presumably structural: capping the hydrophobic core.	Domain
A, B	PF12799	Leucine Rich repeats (2 copies) (LRR_4)	Leucine Rich repeats (2 copies)	-	Repeat
A, B	PF08191	LRR adjacent (LRR_adjacent)	LRR adjacent	-	Family