Annotations: 6P4B

HyHEL10 fab variant HyHEL10-4x (heavy chain mutations L4F, Y33H, S56N, and Y58F) bound to hen egg lysozyme variant HEL2x-flex (mutations R21Q, R73E, C76S, and C94S)

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A [auth L]	d6p4bl1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Immunoglobulin light chain kappa variable domain, VL-kappa	Mouse (Mus musculus ) [TaxId: 10090 ], Mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
A [auth L]	d6p4bl2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Immunoglobulin light chain kappa constant domain, CL-kappa	Mouse (Mus musculus ) [TaxId: 10090 ], Mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
D [auth A]	d6p4ba1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Immunoglobulin light chain kappa variable domain, VL-kappa	Mouse (Mus musculus ) [TaxId: 10090 ], Mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
D [auth A]	d6p4ba2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Immunoglobulin light chain kappa constant domain, CL-kappa	Mouse (Mus musculus ) [TaxId: 10090 ], Mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
B [auth H]	d6p4bh_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	Mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
E [auth B]	d6p4bb_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	Mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
C	d6p4bc_	Alpha and beta proteins (a+b)	Lysozyme-like	Lysozyme-like	C-type lysozyme	Lysozyme	Chicken (Gallus gallus ) [TaxId: 9031 ],	SCOPe (2.08)
F [auth D]	d6p4bd_	Alpha and beta proteins (a+b)	Lysozyme-like	Lysozyme-like	C-type lysozyme	Lysozyme	Chicken (Gallus gallus ) [TaxId: 9031 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
C	SCOP2B Superfamily	Lysozyme-like	8037428	3001879	SCOP2B (2022-06-29)
F [auth D]	SCOP2B Superfamily	Lysozyme-like	8037428	3001879	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth L]	Rhodanese	e6p4bL1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases	T: Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases	F: Rhodanese	ECOD (v294.1)
D [auth A]	Rhodanese	e6p4bA1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases	T: Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases	F: Rhodanese	ECOD (v294.1)
B [auth H]	Rhodanese	e6p4bH1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases	T: Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases	F: Rhodanese	ECOD (v294.1)
E [auth B]	Rhodanese	e6p4bB1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases	T: Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases	F: Rhodanese	ECOD (v294.1)
C	Rhodanese	e6p4bC1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases	T: Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases	F: Rhodanese	ECOD (v294.1)
F [auth D]	Rhodanese	e6p4bD1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases	T: Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases	F: Rhodanese	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D [auth A]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
B [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
E [auth B]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
C	1.10.530.10	Mainly Alpha	Orthogonal Bundle	Lysozyme		CATH (utative)
F [auth D]	1.10.530.10	Mainly Alpha	Orthogonal Bundle	Lysozyme		CATH (utative)

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 [auth L], D [auth A]	-	L-KAPPA	-	IGKV5-4301, IGKJ201, IGKC01, IGKC02	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202615-0)
B [auth H], E [auth B]	-	VH-CH1	-	IGHV3-802, IGHV3S101, IGHJ301, IGHG102	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202615-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
A [auth L], D [auth A]	Light Chain	IGKV5	Kappa	lysozyme c	SAbDab (2026-04-24)
B [auth H], E [auth B]	Heavy Chain	IGHV3	-	lysozyme c	SAbDab (2026-04-24)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C, F [auth D]	PF00062	C-type lysozyme/alpha-lactalbumin family (Lys)	C-type lysozyme/alpha-lactalbumin family	Alpha-lactalbumin is the regulatory subunit of lactose synthase, changing the substrate specificity of galactosyltransferase from N-acetylglucosamine to glucose. C-type lysozymes are secreted bacteriolytic enzymes that cleave the peptidoglycan of bac ...	Alpha-lactalbumin is the regulatory subunit of lactose synthase, changing the substrate specificity of galactosyltransferase from N-acetylglucosamine to glucose. C-type lysozymes are secreted bacteriolytic enzymes that cleave the peptidoglycan of bacterial cell walls. Structure is a multi-domain, mixed alpha and beta fold, containing four conserved disulfide bonds.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth L], D [auth A]	HyHEL10 Fab light chain	-	response to stimulus immune response immune system process adaptive immune response	cell periphery cellular anatomical structure plasma membrane membrane protein-containing complex immunoglobulin complex extracellular region
B [auth H], E [auth B]	HyHEL10 Fab heavy chain	-	-	-
C, F [auth D]	Lysozyme C	hydrolase activity, acting on glycosyl bonds hexosaminidase activity beta-N-acetylhexosaminidase activity beta-N-acetylglucosaminidase activity hydrolase activity, hydrolyzing O-glycosyl compounds hydrolase activity catalytic activity peptidoglycan muralytic activity lysozyme activity identical protein binding protein binding binding	catabolic process cell wall organization or biogenesis metabolic process cellular process macromolecule metabolic process macromolecule catabolic process cell wall macromolecule catabolic process cell wall macromolecule metabolic process biological process involved in interspecies interaction between organisms disruption of cell in another organism disruption of anatomical structure in another organism killing of cells of another organism cell killing response to stimulus catabolic process cell wall organization or biogenesis metabolic process cellular process macromolecule metabolic process macromolecule catabolic process cell wall macromolecule catabolic process cell wall macromolecule metabolic process biological process involved in interspecies interaction between organisms disruption of cell in another organism disruption of anatomical structure in another organism killing of cells of another organism cell killing response to stimulus response to other organism defense response response to external stimulus defense response to Gram-negative bacterium response to biotic stimulus defense response to bacterium response to bacterium response to stress response to external biotic stimulus defense response to Gram-positive bacterium	cellular anatomical structure intracellular anatomical structure cytoplasm membrane-bounded organelle intracellular organelle organelle endoplasmic reticulum intracellular membrane-bounded organelle endomembrane system

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth L], D [auth A]	IPR003597	Immunoglobulin C1-set	Domain
A [auth L], D [auth A]	IPR050150	Immunoglobulin Variable Light Chain	Family
A [auth L], D [auth A]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A [auth L], D [auth A]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A [auth L], D [auth A]	IPR013106	Immunoglobulin V-set domain	Domain
A [auth L], D [auth A]	IPR003599	Immunoglobulin domain subtype	Domain
A [auth L], D [auth A]	IPR007110	Immunoglobulin-like domain	Domain
A [auth L], D [auth A]	IPR003006	Immunoglobulin/major histocompatibility complex, conserved site	Conserved Site
C, F [auth D]	IPR001916	Glycoside hydrolase, family 22	Family
C, F [auth D]	IPR023346	Lysozyme-like domain superfamily	Homologous Superfamily
C, F [auth D]	IPR019799	Glycoside hydrolase family 22 domain	Domain
C, F [auth D]	IPR000974	Glycoside hydrolase, family 22, lysozyme	Family

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