1FBI | pdb_00001fbi

CRYSTAL STRUCTURE OF A CROSS-REACTION COMPLEX BETWEEN FAB F9.13.7 AND GUINEA-FOWL LYSOZYME

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)
F [auth Y]	d1fbiy_	Alpha and beta proteins (a+b)	Lysozyme-like	Lysozyme-like	C-type lysozyme	Lysozyme	helmeted guineafowl (Numida meleagris ) [TaxId: 8996 ],	SCOPe (2.08)
C [auth X]	d1fbix_	Alpha and beta proteins (a+b)	Lysozyme-like	Lysozyme-like	C-type lysozyme	Lysozyme	helmeted guineafowl (Numida meleagris ) [TaxId: 8996 ],	SCOPe (2.08)
E [auth Q]	d1fbiq1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Immunoglobulin heavy chain variable domain, VH	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
E [auth Q]	d1fbiq2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Immunoglobulin heavy chain gamma constant domain 1, CH1-gamma	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
E [auth Q]	d1fbiq3	Artifacts	Tags	Tags	Tags	N-terminal Tags	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
B [auth H]	d1fbih1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Immunoglobulin heavy chain variable domain, VH	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
B [auth H]	d1fbih2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Immunoglobulin heavy chain gamma constant domain 1, CH1-gamma	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
B [auth H]	d1fbih3	Artifacts	Tags	Tags	Tags	N-terminal Tags	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
D [auth P]	d1fbip1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Immunoglobulin light chain kappa variable domain, VL-kappa	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
D [auth P]	d1fbip2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Immunoglobulin light chain kappa constant domain, CL-kappa	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
A [auth L]	d1fbil1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Immunoglobulin light chain kappa variable domain, VL-kappa	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
A [auth L]	d1fbil2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Immunoglobulin light chain kappa constant domain, CL-kappa	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
F [auth Y]	SCOP2B Superfamily	Lysozyme-like	8033686	3001879	SCOP2B (2022-06-29)
C [auth X]	SCOP2B Superfamily	Lysozyme-like	8033686	3001879	SCOP2B (2022-06-29)
D [auth P]	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8091539	3000071	SCOP2B (2022-06-29)
A [auth L]	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8091539	3000071	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)
F [auth Y]		e1fbiY1	A: C-terminal subdomain in Lon-related proteases catalytic domains	X: C-terminal subdomain in Lon-related proteases catalytic domains	H: C-terminal subdomain in Lon-related proteases catalytic domains	T: CBAH	F:	ECOD (20:10:01)
C [auth X]		e1fbiX1	A: C-terminal subdomain in Lon-related proteases catalytic domains	X: C-terminal subdomain in Lon-related proteases catalytic domains	H: C-terminal subdomain in Lon-related proteases catalytic domains	T: CBAH	F:	ECOD (20:10:01)
E [auth Q]		e1fbiQ1	A: Cloacin translocation domain	X: Cloacin translocation domain	H: Cloacin translocation domain	T: Copper-bind	F:	ECOD (20:10:01)
B [auth H]		e1fbiH1	A: Cloacin translocation domain	X: Cloacin translocation domain	H: Cloacin translocation domain	T: Copper-bind	F:	ECOD (20:10:01)
D [auth P]		e1fbiP1	A: Cloacin translocation domain	X: Cloacin translocation domain	H: Cloacin translocation domain	T: Copper-bind	F:	ECOD (20:10:01)
A [auth L]		e1fbiL1	A: Cloacin translocation domain	X: Cloacin translocation domain	H: Cloacin translocation domain	T: Copper-bind	F:	ECOD (20:10:01)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
F [auth Y]	1.10.530.10	Mainly Alpha	Orthogonal Bundle	Lysozyme		CATH (4.3.0)
C [auth X]	1.10.530.10	Mainly Alpha	Orthogonal Bundle	Lysozyme		CATH (4.3.0)
E [auth Q]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
D [auth P]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A [auth L]	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 [auth H], E [auth Q]	F9.13.7, anti-lysozyme [hen egg white]	VH-CH1	Mus musculus (house mouse)	IGHV1-6902, IGHJ202, IGHJ203, IGHG101	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202609-0)
A [auth L], D [auth P]	F9.13.7, anti-lysozyme [hen egg white]	L-KAPPA	Mus musculus (house mouse)	IGKV10-9601, IGKV10-9602, IGKJ201, IGKC01, IGKC*02	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202609-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth H], E [auth Q]	Heavy Chain	IGHV1	-	guinea fowl lysozyme	SAbDab (2026-03-13)
A [auth L], D [auth P]	Light Chain	IGKV10	Kappa	guinea fowl lysozyme	SAbDab (2026-03-13)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B [auth H], E [auth Q]	PF07654	Immunoglobulin C1-set domain (C1-set)	Immunoglobulin C1-set domain		Domain
A [auth L], D [auth P]	PF07654	Immunoglobulin C1-set domain (C1-set)	Immunoglobulin C1-set domain		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth X], F [auth Y]	GUINEA FOWL LYSOZYME	hydrolase activity, acting on glycosyl bonds peptidoglycan muralytic activity hydrolase activity, hydrolyzing O-glycosyl compounds lysozyme activity hydrolase activity catalytic activity	biological process involved in interspecies interaction between organisms 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 catabolic process cell wall organization or biogenesis biological process involved in interspecies interaction between organisms 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 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 disruption of cell in another organism disruption of anatomical structure in another organism killing of cells of another organism cell killing	cellular anatomical structure intracellular anatomical structure cytoplasm extracellular region
B [auth H], E [auth Q]	IGG1 F9.13.7 FAB (HEAVY CHAIN)	-	-	cellular anatomical structure extracellular region
A [auth L], D [auth P]	IGG1 F9.13.7 FAB (LIGHT CHAIN)	-	developmental process multicellular organismal process cellular developmental process hemopoiesis B cell activation cell activation cell development mononuclear cell differentiation lymphocyte differentiation lymphocyte activation leukocyte activation B cell differentiation cell differentiation immune system process anatomical structure development developmental process multicellular organismal process cellular developmental process hemopoiesis B cell activation cell activation cell development mononuclear cell differentiation lymphocyte differentiation lymphocyte activation leukocyte activation B cell differentiation cell differentiation immune system process anatomical structure development cellular process leukocyte differentiation response to stimulus immune response adaptive immune response	cell periphery cellular anatomical structure plasma membrane membrane protein-containing complex plasma membrane protein complex membrane protein complex alpha-beta T cell receptor complex receptor complex plasma membrane signaling receptor complex T cell receptor complex extracellular region IgG immunoglobulin complex immunoglobulin complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C [auth X], F [auth Y]	IPR001916	Glycoside hydrolase, family 22	Family
C [auth X], F [auth Y]	IPR019799	Glycoside hydrolase family 22 domain	Domain
C [auth X], F [auth Y]	IPR000974	Glycoside hydrolase, family 22, lysozyme	Family
C [auth X], F [auth Y]	IPR023346	Lysozyme-like domain superfamily	Homologous Superfamily
B [auth H], E [auth Q]	IPR003597	Immunoglobulin C1-set	Domain
B [auth H], E [auth Q]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
B [auth H], E [auth Q]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
B [auth H], E [auth Q]	IPR007110	Immunoglobulin-like domain	Domain
B [auth H], E [auth Q]	IPR050380	Immune Recognition and Response Modulators	Family
A [auth L], D [auth P]	IPR003597	Immunoglobulin C1-set	Domain
A [auth L], D [auth P]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A [auth L], D [auth P]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A [auth L], D [auth P]	IPR007110	Immunoglobulin-like domain	Domain
A [auth L], D [auth P]	IPR050380	Immune Recognition and Response Modulators	Family
A [auth L], D [auth P]	IPR003006	Immunoglobulin/major histocompatibility complex, conserved site	Conserved Site

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.