Annotations: 2BSE

Structure of Lactococcal Bacteriophage p2 Receptor Binding Protein in complex with a llama VHH domain

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)
C	d2bsec_	All beta proteins	Virus attachment protein globular domain	Virus attachment protein globular domain	Lactophage receptor-binding protein head domain	receptor binding protein, rbp, C-terminal domain	(Lactococcus virus P2 ) [TaxId: 254252 ],	SCOPe (2.08)
B	d2bseb_	All beta proteins	Virus attachment protein globular domain	Virus attachment protein globular domain	Lactophage receptor-binding protein head domain	receptor binding protein, rbp, C-terminal domain	(Lactococcus virus P2 ) [TaxId: 254252 ],	SCOPe (2.08)
A	d2bsea_	All beta proteins	Virus attachment protein globular domain	Virus attachment protein globular domain	Lactophage receptor-binding protein head domain	receptor binding protein, rbp, C-terminal domain	(Lactococcus virus P2 ) [TaxId: 254252 ],	SCOPe (2.08)
F	d2bsef1	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)
F	d2bsef2	Artifacts	Tags	Tags	Tags	N-terminal Tags	LLAMA (Lama glama ) [TaxId: 9844 ],	SCOPe (2.08)
E	d2bsee1	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)
E	d2bsee2	Artifacts	Tags	Tags	Tags	N-terminal Tags	LLAMA (Lama glama ) [TaxId: 9844 ],	SCOPe (2.08)
D	d2bsed1	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)
D	d2bsed2	Artifacts	Tags	Tags	Tags	N-terminal Tags	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	B	e2bseC1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: B	ECOD (v295.2)
B	B	e2bseB1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: B	ECOD (v295.2)
A	B	e2bseA1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: B	ECOD (v295.2)
F	B	e2bseF1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: B	ECOD (v295.2)
E	B	e2bseE1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: B	ECOD (v295.2)
D		e2bseD1	A: alpha arrays	X: Globin-like	H: Globin-like	T: Globin-like	F:	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C	2.60.40.1830	Mainly Beta	Sandwich	Immunoglobulin-like	Phage tail base-plate Siphoviridae RBP, head domain	CATH (4.3.0)
B	2.60.40.1830	Mainly Beta	Sandwich	Immunoglobulin-like	Phage tail base-plate Siphoviridae RBP, head domain	CATH (4.3.0)
A	2.60.40.1830	Mainly Beta	Sandwich	Immunoglobulin-like	Phage tail base-plate Siphoviridae RBP, head domain	CATH (4.3.0)
F	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
E	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
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
D, E, F	Llama heavy chain VH domain	VH	Lama glama (llama)	IGHV3S301, IGHJ401	V-DOMAIN VH	IG	(VH)	IMGT (202640-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D, E, F	Heavy Chain	IGHV1	-	receptor binding protein	SAbDab (2026-10-16)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C	RECEPTOR BINDING PROTEIN	-	virion attachment to host cell biological process involved in interspecies interaction between organisms adhesion of symbiont to host cell viral process viral life cycle adhesion of symbiont to host biological process involved in interaction with host biological process involved in symbiotic interaction receptor-mediated virion attachment to host cell entry receptor-mediated virion attachment to host cell cell adhesion cellular process symbiont entry into host cell symbiont entry into host	virus tail virion component virus tail, baseplate
D, E, F	LLAMA IMMUNOGLOBULIN	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C	IPR048779	Receptor binding protein, neck domain	Domain
A, B, C	IPR048780	Receptor-binding protein, N-terminal shoulder domain	Domain
A, B, C	IPR008982	Adenovirus pIV-like, attachment domain	Homologous Superfamily
A, B, C	IPR015027	Receptor-binding protein of phage tail base-plate Siphoviridae, head	Domain