5TDP | pdb_00005tdp

Crystal structure of the Fab fragment of anti-HER2 antibody 4D5 with redesigned heavy and light chain interfaces

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
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)
D	Ribosomal_L29	e5tdpD1	A: alpha bundles	X: Long alpha-hairpin	H: Ribosomal protein L29 (L29p)	T: Ribosomal protein L29 (L29p)	F: Ribosomal_L29	ECOD (develop294)
B	Ribosomal_L29	e5tdpB1	A: alpha bundles	X: Long alpha-hairpin	H: Ribosomal protein L29 (L29p)	T: Ribosomal protein L29 (L29p)	F: Ribosomal_L29	ECOD (develop294)
C	Ribosomal_L29	e5tdpC1	A: alpha bundles	X: Long alpha-hairpin	H: Ribosomal protein L29 (L29p)	T: Ribosomal protein L29 (L29p)	F: Ribosomal_L29	ECOD (develop294)
A	Ribosomal_L29	e5tdpA1	A: alpha bundles	X: Long alpha-hairpin	H: Ribosomal protein L29 (L29p)	T: Ribosomal protein L29 (L29p)	F: Ribosomal_L29	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
C	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A	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
B, D	Fab 4D5, anti-HER2	VH-CH1	Homo sapiens (human)	IGHV3-6601, IGHV3-6602, IGHV3-6604, IGHJ401, IGHJ402, IGHJ403, IGHG101, IGHG102, IGHG104, IGHG105, IGHG112, IGHG114, IGHG113, IGHG109, IGHG110, IGHG107, IGHG111, IGHG115, IGHG1*16	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202610-0)
A, C	Fab 4D5, anti-HER2	L-KAPPA	Homo sapiens (human)	IGKV1D-7-101, IGKJ101, IGKC*01	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202610-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B, D	Heavy Chain	IGHV3	-	-	SAbDab (2026-03-20)
A, C	Light Chain	IGKV1	Kappa	-	SAbDab (2026-03-20)

Thera-SAbDab Antibody Annotation Thera-SAbDab Database Homepage

Chain	Name	Target	Provenance Source
B, D	Trastuzumab	ERBB2/CD340/HER2, TNFRSF9/CD137/4-1BB, SIRPA, CD3E	Therapeutic SAbDab (2026-03-20)
A, C	Caxmotabart	ERBB2/CD340/HER2, TNFRSF9/CD137/4-1BB, SIRPA, CD3E	Therapeutic SAbDab (2026-03-20)

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.