Annotations: 6QTL

Caffeine recognizing nanobody

External Resource: Annotation

Domain Annotation: ECOD Classification
IMGT Antibody Annotation
SAbDab Antibody Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
D [auth C]	DNA_pol_A_exo1	e6qtlC1	A: a/b three-layered sandwiches	X: PriB N-terminal domain-like	H: Aconitase iron-sulfur domain	T: Aconitase iron-sulfur domain	F: DNA_pol_A_exo1	ECOD (v294.1)
G [auth F]	DNA_pol_A_exo1	e6qtlF1	A: a/b three-layered sandwiches	X: PriB N-terminal domain-like	H: Aconitase iron-sulfur domain	T: Aconitase iron-sulfur domain	F: DNA_pol_A_exo1	ECOD (v294.1)
H [auth G]	DNA_pol_A_exo1	e6qtlG1	A: a/b three-layered sandwiches	X: PriB N-terminal domain-like	H: Aconitase iron-sulfur domain	T: Aconitase iron-sulfur domain	F: DNA_pol_A_exo1	ECOD (v294.1)
C [auth B]	DNA_pol_A_exo1	e6qtlB1	A: a/b three-layered sandwiches	X: PriB N-terminal domain-like	H: Aconitase iron-sulfur domain	T: Aconitase iron-sulfur domain	F: DNA_pol_A_exo1	ECOD (v294.1)
A [auth H]	DNA_pol_A_exo1	e6qtlH1	A: a/b three-layered sandwiches	X: PriB N-terminal domain-like	H: Aconitase iron-sulfur domain	T: Aconitase iron-sulfur domain	F: DNA_pol_A_exo1	ECOD (v294.1)
B [auth A]	PDEase_I	e6qtlA1	A: a/b three-layered sandwiches	X: PriB N-terminal domain-like	H: Aconitase iron-sulfur domain	T: Aconitase iron-sulfur domain	F: PDEase_I	ECOD (v294.1)
F [auth E]	DNA_pol_A_exo1	e6qtlE1	A: a/b three-layered sandwiches	X: PriB N-terminal domain-like	H: Aconitase iron-sulfur domain	T: Aconitase iron-sulfur domain	F: DNA_pol_A_exo1	ECOD (v294.1)
E [auth D]	DNA_pol_A_exo1	e6qtlD1	A: a/b three-layered sandwiches	X: PriB N-terminal domain-like	H: Aconitase iron-sulfur domain	T: Aconitase iron-sulfur domain	F: DNA_pol_A_exo1	ECOD (v294.1)

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
C [auth B], D [auth C], G [auth F], H [auth G]	VHH, anti-Caffeine	VH	Vicugna pacos (alpaca)	IGHV3-301, IGHJ401	V-DOMAIN VH	IG	VH_VH	IMGT (202615-0)
A [auth H], B [auth A], E [auth D], F [auth E]	VHH, anti-Caffeine	VH	Vicugna pacos (alpaca)	IGHV3-301, IGHJ401	V-DOMAIN VH	IG	VH_VH	IMGT (202615-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth B], D [auth C], G [auth F], H [auth G]	Heavy Chain	IGHV1	-	CAFFEINE	SAbDab (2026-04-24)
A [auth H], B [auth A], E [auth D], F [auth E]	Heavy Chain	IGHV1	-	CAFFEINE	SAbDab (2026-04-24)

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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.

6QTL | pdb_00006qtl

Caffeine recognizing nanobody

External Resource: Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

IMGT Antibody Annotation IMGT Database Homepage

SAbDab Antibody Annotation SAbDab Database Homepage