6QD6 | pdb_00006qd6

Molecular scaffolds expand the nanobody toolkit for cryo-EM applications: crystal structure of Mb-cHopQ-Nb207

External Resource: Annotation

Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Protein Family Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: mpstruc

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
J	MG4	e6qd6J1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: Helical bundle in flu nucleocapsid protein	T: Helical bundle in flu nucleocapsid protein	F: MG4	ECOD (v294.1)
I	V-set	e6qd6I1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: Helical bundle in flu nucleocapsid protein	T: Helical bundle in flu nucleocapsid protein	F: V-set	ECOD (v294.1)
H	V-set	e6qd6H1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: Helical bundle in flu nucleocapsid protein	T: Helical bundle in flu nucleocapsid protein	F: V-set	ECOD (v294.1)
G	V-set	e6qd6G1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: Helical bundle in flu nucleocapsid protein	T: Helical bundle in flu nucleocapsid protein	F: V-set	ECOD (v294.1)
F	V-set	e6qd6F1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: Helical bundle in flu nucleocapsid protein	T: Helical bundle in flu nucleocapsid protein	F: V-set	ECOD (v294.1)
E	V-set	e6qd6E1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: Helical bundle in flu nucleocapsid protein	T: Helical bundle in flu nucleocapsid protein	F: V-set	ECOD (v294.1)
D	V-set	e6qd6D1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: Helical bundle in flu nucleocapsid protein	T: Helical bundle in flu nucleocapsid protein	F: V-set	ECOD (v294.1)
C	V-set	e6qd6C1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: Helical bundle in flu nucleocapsid protein	T: Helical bundle in flu nucleocapsid protein	F: V-set	ECOD (v294.1)
B	V-set	e6qd6B1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: Helical bundle in flu nucleocapsid protein	T: Helical bundle in flu nucleocapsid protein	F: V-set	ECOD (v294.1)
A	V-set	e6qd6A1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: Helical bundle in flu nucleocapsid protein	T: Helical bundle in flu nucleocapsid protein	F: V-set	ECOD (v294.1)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	Heavy Chain	IGHV1	-	-	SAbDab (2026-04-10)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	PF18304	SabA N-terminal extracellular adhesion domain (SabA_adhesion)	SabA N-terminal extracellular adhesion domain	This is the N-terminal extracellular adhesion domain of Sialic acid binding adhesin (SabA) present in Helicobacter pylori. The N-terminal domain of SabA functions as a sugar-binding adhesion domain with conserved disulfide bonds. Notably, these amino ...	This is the N-terminal extracellular adhesion domain of Sialic acid binding adhesin (SabA) present in Helicobacter pylori. The N-terminal domain of SabA functions as a sugar-binding adhesion domain with conserved disulfide bonds. Notably, these amino acid residues are not only conserved among SabA orthologs but also between SabA and BabA [1].	Domain

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	IPR040838	SabA, N-terminal extracellular adhesion domain	Domain
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	IPR002718	Outer membrane protein, Helicobacter	Family

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Cys-Loop Receptor Family	GABA_A receptor (β3 homopentamer) in complex with histamine and megabody Mb25

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.