Annotations: 9QBJ

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
G [auth I]	SCOP2B Superfamily	Bacterial immunoglobulin/albumin-binding domains	8032875	3001373	SCOP2B (2022-06-29)
H [auth J]	SCOP2B Superfamily	Bacterial immunoglobulin/albumin-binding domains	8032875	3001373	SCOP2B (2022-06-29)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth E], E [auth G]	Heavy Chain	IGHV5	-	maltose/maltodextrin-binding periplasmic protein,immunoglobulin g-binding protein a,immunoglobulin g-binding protein g	SAbDab (2025-09-26)
D [auth F], F [auth H]	Light Chain	IGKV8	Kappa	maltose/maltodextrin-binding periplasmic protein,immunoglobulin g-binding protein a,immunoglobulin g-binding protein g	SAbDab (2025-09-26)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
G [auth I]	PF17573	GA-like domain (GA-like)	GA-like domain	This domain is found in bacterial cell surface proteins. It is related to the GA domain that forms a three helix bundle.	Domain
G [auth I]	PF01378	B domain (IgG_binding_B)	B domain	This domain is found as a tandem repeat in Streptococcal cell surface proteins, such as the IgG binding protein G.	Domain
G [auth I]	PF02216	B domain (B)	B domain	This family contains the B domain of Staphylococcal protein A, which specifically binds to the Fc portion of immunoglobulin G.	Domain
H [auth J]	PF17573	GA-like domain (GA-like)	GA-like domain	This domain is found in bacterial cell surface proteins. It is related to the GA domain that forms a three helix bundle.	Domain
H [auth J]	PF01378	B domain (IgG_binding_B)	B domain	This domain is found as a tandem repeat in Streptococcal cell surface proteins, such as the IgG binding protein G.	Domain
H [auth J]	PF02216	B domain (B)	B domain	This family contains the B domain of Staphylococcal protein A, which specifically binds to the Fc portion of immunoglobulin G.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth C], B [auth D]	Nanobody ALFA-H6	-	-	-
C [auth E], E [auth G]	Fab antibody 8D3_2_H-H6	-	-	-
D [auth F], F [auth H]	Fa antibody 8D3_2_L	-	-	-
G [auth I]	Maltose/maltodextrin-binding periplasmic protein,Immunoglobulin G-binding protein A,Immunoglobulin G-binding protein G	protein-containing complex binding binding immunoglobulin binding IgG binding	symbiont-mediated suppression of host signal transduction pathway symbiont-mediated perturbation of host cellular process biological process involved in interspecies interaction between organisms symbiont-mediated suppression of host signal transduction pathway via antagonism of host cell surface receptor symbiont-mediated perturbation of host process symbiont-mediated perturbation of host signal transduction pathway modulation of process of another organism biological process involved in interaction with host biological process involved in symbiotic interaction	cellular anatomical structure extracellular region
H [auth J]	Maltose/maltodextrin-binding periplasmic protein,Immunoglobulin G-binding protein A,Immunoglobulin G-binding protein G	protein-containing complex binding binding immunoglobulin binding IgG binding	symbiont-mediated suppression of host signal transduction pathway symbiont-mediated perturbation of host cellular process biological process involved in interspecies interaction between organisms symbiont-mediated suppression of host signal transduction pathway via antagonism of host cell surface receptor symbiont-mediated perturbation of host process symbiont-mediated perturbation of host signal transduction pathway modulation of process of another organism biological process involved in interaction with host biological process involved in symbiotic interaction	cellular anatomical structure extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
G [auth I]	IPR009063	Immunoglobulin/albumin-binding domain superfamily	Homologous Superfamily
G [auth I]	IPR005877	YSIRK Gram-positive signal peptide	Domain
G [auth I]	IPR036779	LysM domain superfamily	Homologous Superfamily
G [auth I]	IPR005038	Octapeptide repeat	Repeat
G [auth I]	IPR003132	Protein A, Ig-binding domain	Domain
G [auth I]	IPR018392	LysM domain	Domain
G [auth I]	IPR019931	LPXTG cell wall anchor domain	Domain
G [auth I]	IPR009063	Immunoglobulin/albumin-binding domain superfamily	Homologous Superfamily
G [auth I]	IPR019950	M protein-type anchor domain	Domain
G [auth I]	IPR005877	YSIRK Gram-positive signal peptide	Domain
G [auth I]	IPR000724	IgG-binding B	Domain
G [auth I]	IPR035152	GA-like domain	Domain
G [auth I]	IPR019931	LPXTG cell wall anchor domain	Domain
H [auth J]	IPR009063	Immunoglobulin/albumin-binding domain superfamily	Homologous Superfamily
H [auth J]	IPR005877	YSIRK Gram-positive signal peptide	Domain
H [auth J]	IPR036779	LysM domain superfamily	Homologous Superfamily
H [auth J]	IPR005038	Octapeptide repeat	Repeat
H [auth J]	IPR003132	Protein A, Ig-binding domain	Domain
H [auth J]	IPR018392	LysM domain	Domain
H [auth J]	IPR019931	LPXTG cell wall anchor domain	Domain
H [auth J]	IPR009063	Immunoglobulin/albumin-binding domain superfamily	Homologous Superfamily
H [auth J]	IPR019950	M protein-type anchor domain	Domain
H [auth J]	IPR005877	YSIRK Gram-positive signal peptide	Domain
H [auth J]	IPR000724	IgG-binding B	Domain
H [auth J]	IPR035152	GA-like domain	Domain
H [auth J]	IPR019931	LPXTG cell wall anchor domain	Domain