Annotations: 4X4X

Retrofitting antibodies with stabilizing mutations. Herceptin scFv mutant.

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Thera-SAbDab Antibody Annotation

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
C	d4x4xc_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d4x4xa_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d4x4xb_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
D	d4x4xd_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C	PI3_PI4_kinase	e4x4xC1	A: a/b three-layered sandwiches	X: Restriction endonuclease-like	H: Restriction endonuclease-like	T: Restriction endonuclease-like	F: PI3_PI4_kinase	ECOD (v294.1)
A	PI3_PI4_kinase	e4x4xA1	A: a/b three-layered sandwiches	X: Restriction endonuclease-like	H: Restriction endonuclease-like	T: Restriction endonuclease-like	F: PI3_PI4_kinase	ECOD (v294.1)
B	PI3_PI4_kinase	e4x4xB1	A: a/b three-layered sandwiches	X: Restriction endonuclease-like	H: Restriction endonuclease-like	T: Restriction endonuclease-like	F: PI3_PI4_kinase	ECOD (v294.1)
D	PI3_PI4_kinase	e4x4xD1	A: a/b three-layered sandwiches	X: Restriction endonuclease-like	H: Restriction endonuclease-like	T: Restriction endonuclease-like	F: PI3_PI4_kinase	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
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)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
D	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
A, C	Herceptin FV	VH	Homo sapiens (human)	IGHV3-6601, IGHV3-6602, IGHV3-6604, IGHJ601, IGHJ6*02	V-DOMAIN VH	IG	FV-HEAVY_KAPPA	IMGT (202615-0)
B, D	Herceptin FV	V-KAPPA	Homo sapiens (human)	IGKV1-3901, IGKV1D-3901, IGKJ1*01	V-DOMAIN V-KAPPA	IG	FV-HEAVY_KAPPA	IMGT (202615-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
A, C	Heavy Chain	IGHV3	-	-	SAbDab (2026-04-24)
B, D	Light Chain	IGKV1	Kappa	-	SAbDab (2026-04-24)

Thera-SAbDab Antibody Annotation Thera-SAbDab Database Homepage

Chain	Name	Target	Provenance Source
A, C	Runimotamab	ERBB2/CD340/HER2, CD3E, TNFRSF9/CD137/4-1BB, SIRPA	Therapeutic SAbDab (2026-04-24)
B, D	Anvatabart	ERBB2/CD340/HER2, CD3E, SIRPA, TNFRSF9/CD137/4-1BB	Therapeutic SAbDab (2026-04-24)

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