Annotations: 8SJK

Pembrolizumab Caffeine crystal

External Resource: Annotation

Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Thera-SAbDab Antibody Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	WD40	e8sjkA1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: WD40	ECOD (v294.2)
B	WD40	e8sjkB1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: WD40	ECOD (v294.2)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
A	Light Chain	IGKV3	Kappa	CAFFEINE	SAbDab (2026-06-12)
B	Heavy Chain	IGHV1	-	CAFFEINE	SAbDab (2026-06-12)

Thera-SAbDab Antibody Annotation Thera-SAbDab Database Homepage

Chain	Name	Target	Provenance Source
A	Pembrolizumab	PDCD1/CD279/PD1	Therapeutic SAbDab (2026-06-12)
B	Pembrolizumab	PDCD1/CD279/PD1	Therapeutic SAbDab (2026-06-12)

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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.