1I9R | pdb_00001i9r

STRUCTURE OF CD40L IN COMPLEX WITH THE FAB FRAGMENT OF HUMANIZED 5C8 ANTIBODY

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
Thera-SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1i9ra_	All beta proteins	TNF-like	TNF-like	TNF-like	Extracellular domain of CD40 ligand	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d1i9rb_	All beta proteins	TNF-like	TNF-like	TNF-like	Extracellular domain of CD40 ligand	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C	d1i9rc_	All beta proteins	TNF-like	TNF-like	TNF-like	Extracellular domain of CD40 ligand	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
D [auth H]	d1i9rh1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Immunoglobulin heavy chain variable domain, VH	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
D [auth H]	d1i9rh2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Immunoglobulin heavy chain gamma constant domain 1, CH1-gamma	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
F [auth K]	d1i9rk1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Immunoglobulin heavy chain variable domain, VH	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
F [auth K]	d1i9rk2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Immunoglobulin heavy chain gamma constant domain 1, CH1-gamma	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
H [auth X]	d1i9rx1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Immunoglobulin heavy chain variable domain, VH	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
H [auth X]	d1i9rx2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Immunoglobulin heavy chain gamma constant domain 1, CH1-gamma	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
E [auth L]	d1i9rl1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Immunoglobulin light chain kappa variable domain, VL-kappa	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
E [auth L]	d1i9rl2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Immunoglobulin light chain kappa constant domain, CL-kappa	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
G [auth M]	d1i9rm1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Immunoglobulin light chain kappa variable domain, VL-kappa	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
G [auth M]	d1i9rm2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Immunoglobulin light chain kappa constant domain, CL-kappa	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
I [auth Y]	d1i9ry1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Immunoglobulin light chain kappa variable domain, VL-kappa	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
I [auth Y]	d1i9ry2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Immunoglobulin light chain kappa constant domain, CL-kappa	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	TNF-like	8041217	3000061	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	TNF-like	8041217	3000061	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	TNF-like	8041217	3000061	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	TNF	e1i9rA1	A: beta sandwiches	X: jelly-roll	H: TNF-like (From Topology)	T: TNF-like	F: TNF	ECOD (1.6)
B	TNF	e1i9rB1	A: beta sandwiches	X: jelly-roll	H: TNF-like (From Topology)	T: TNF-like	F: TNF	ECOD (1.6)
C	TNF	e1i9rC1	A: beta sandwiches	X: jelly-roll	H: TNF-like (From Topology)	T: TNF-like	F: TNF	ECOD (1.6)
D [auth H]	V-set_8	e1i9rH1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_8	ECOD (1.6)
D [auth H]	C1-set_1	e1i9rH2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_1	ECOD (1.6)
F [auth K]	V-set_8	e1i9rK1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_8	ECOD (1.6)
F [auth K]	C1-set_1	e1i9rK2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_1	ECOD (1.6)
H [auth X]	V-set_8	e1i9rX1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_8	ECOD (1.6)
H [auth X]	C1-set_1	e1i9rX2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_1	ECOD (1.6)
E [auth L]	C1-set_4	e1i9rL2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_4	ECOD (1.6)
E [auth L]	V-set	e1i9rL1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set	ECOD (1.6)
G [auth M]	C1-set_4	e1i9rM2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_4	ECOD (1.6)
G [auth M]	V-set	e1i9rM1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set	ECOD (1.6)
I [auth Y]	C1-set_4	e1i9rY2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_4	ECOD (1.6)
I [auth Y]	V-set	e1i9rY1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.60.120.40	Mainly Beta	Sandwich	Jelly Rolls		CATH (4.3.0)
B	2.60.120.40	Mainly Beta	Sandwich	Jelly Rolls		CATH (4.3.0)
C	2.60.120.40	Mainly Beta	Sandwich	Jelly Rolls		CATH (4.3.0)
D [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
F [auth K]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
H [auth X]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
E [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
G [auth M]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
I [auth Y]	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
D [auth H], F [auth K], H [auth X]	Humanized 5C8 neutralizing mAb, anti-CD40 ligand	VH-CH1	Humanized (humanized)	IGHV1-4601, IGHV1-4603, IGHJ501, IGHG101, IGHG102, IGHG104, IGHG1*05	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202540-0)
E [auth L], G [auth M], I [auth Y]	Humanized 5C8 neutralizing mAb, anti-CD40 ligand	L-KAPPA	Humanized (humanized)	IGKV3-1101, IGKJ401, IGKJ402, IGKC01	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202540-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D [auth H], F [auth K], H [auth X]	Heavy Chain	IGHV1	-	cd40 ligand	SAbDab (2025-10-17)
E [auth L], G [auth M], I [auth Y]	Light Chain	IGKV3D	Kappa	cd40 ligand	SAbDab (2025-10-17)

Thera-SAbDab Antibody Annotation Thera-SAbDab Database Homepage

Chain	Name	Target	Provenance Source
D [auth H], F [auth K], H [auth X]	Ruplizumab	CD40LG/CD154	Therapeutic SAbDab (2025-10-17)
E [auth L], G [auth M], I [auth Y]	Ruplizumab	CD40LG/CD154	Therapeutic SAbDab (2025-10-17)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C	PF00229	TNF(Tumour Necrosis Factor) family (TNF)	TNF(Tumour Necrosis Factor) family		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C	CD40 LIGAND	protein binding binding signaling receptor binding cytokine receptor binding tumor necrosis factor receptor superfamily binding CD40 receptor binding cell adhesion molecule binding protein-containing complex binding integrin binding molecular function activator activity molecular function regulator activity cytokine activity signaling receptor regulator activity receptor ligand activity protein binding binding signaling receptor binding cytokine receptor binding tumor necrosis factor receptor superfamily binding CD40 receptor binding cell adhesion molecule binding protein-containing complex binding integrin binding molecular function activator activity molecular function regulator activity cytokine activity signaling receptor regulator activity receptor ligand activity signaling receptor activator activity tumor necrosis factor receptor binding enzyme regulator activity protein serine/threonine kinase activator activity kinase activator activity enzyme activator activity protein kinase activator activity protein kinase regulator activity kinase regulator activity	cellular response to stimulus positive regulation of cell communication regulation of cellular process positive regulation of signal transduction positive regulation of canonical NF-kappaB signal transduction response to stimulus signaling positive regulation of biological process regulation of signal transduction intracellular signal transduction cell communication positive regulation of response to stimulus regulation of intracellular signal transduction intracellular signaling cassette cellular response to stimulus positive regulation of cell communication regulation of cellular process positive regulation of signal transduction positive regulation of canonical NF-kappaB signal transduction response to stimulus signaling positive regulation of biological process regulation of signal transduction intracellular signal transduction cell communication positive regulation of response to stimulus regulation of intracellular signal transduction intracellular signaling cassette signal transduction positive regulation of cellular process regulation of biological process regulation of signaling biological regulation positive regulation of intracellular signal transduction canonical NF-kappaB signal transduction regulation of response to stimulus regulation of cell communication regulation of canonical NF-kappaB signal transduction cellular process positive regulation of signaling 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 leukocyte differentiation negative regulation of programmed cell death regulation of apoptotic process negative regulation of biological process regulation of programmed cell death cell death negative regulation of apoptotic process negative regulation of cellular process apoptotic process programmed cell death integrin-mediated signaling pathway cell surface receptor signaling pathway extrinsic apoptotic signaling pathway positive regulation of apoptotic signaling pathway positive regulation of programmed cell death positive regulation of extrinsic apoptotic signaling pathway positive regulation of apoptotic process regulation of extrinsic apoptotic signaling pathway apoptotic signaling pathway regulation of apoptotic signaling pathway regulation of interleukin-12 production positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of biosynthetic process cytokine production regulation of cytokine production positive regulation of macromolecule metabolic process regulation of multicellular organismal process interleukin-12 production regulation of biosynthetic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process positive regulation of interleukin-12 production regulation of gene expression biosynthetic process positive regulation of gene expression positive regulation of multicellular organismal process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process positive regulation of cytokine production regulation of metabolic process CD40 signaling pathway regulation of body fluid levels wound healing hemostasis blood coagulation response to stress coagulation regulation of biological quality response to wounding platelet activation cell population proliferation B cell proliferation leukocyte proliferation mononuclear cell proliferation lymphocyte proliferation positive regulation of DNA-binding transcription factor activity positive regulation of NF-kappaB transcription factor activity RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process positive regulation of molecular function nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process primary metabolic process nucleobase-containing compound biosynthetic process nucleic acid metabolic process regulation of molecular function regulation of DNA-binding transcription factor activity regulation of DNA-templated transcription production of molecular mediator of immune response regulation of immune effector process immunoglobulin production immune effector process regulation of immunoglobulin production regulation of immune system process regulation of production of molecular mediator of immune response interleukin-10 production regulation of interleukin-10 production positive regulation of interleukin-10 production positive regulation of endothelial cell apoptotic process endothelial cell apoptotic process regulation of endothelial cell apoptotic process cell adhesion cell-cell adhesion leukocyte cell-cell adhesion regulation of leukocyte activation regulation of cell activation positive regulation of leukocyte cell-cell adhesion positive regulation of cell-cell adhesion positive regulation of lymphocyte activation positive regulation of cell activation T cell activation positive regulation of leukocyte activation regulation of cell-cell adhesion positive regulation of immune system process positive regulation of T cell activation positive regulation of cell adhesion regulation of cell adhesion regulation of T cell activation lymphocyte costimulation regulation of leukocyte cell-cell adhesion T cell costimulation regulation of lymphocyte activation defense response inflammatory response immune system development adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity immunoglobulin production involved in immunoglobulin-mediated immune response somatic cell DNA recombination B cell activation involved in immune response cell activation involved in immune response multicellular organism development somatic diversification of immunoglobulins involved in immune response somatic recombination of immunoglobulin gene segments leukocyte activation involved in immune response leukocyte mediated immunity somatic diversification of immune receptors lymphocyte activation involved in immune response somatic recombination of immunoglobulin genes involved in immune response system development immune response DNA recombination DNA metabolic process immunoglobulin mediated immune response adaptive immune response somatic diversification of immunoglobulins somatic diversification of immune receptors via germline recombination within a single locus B cell mediated immunity isotype switching regulation of interleukin-4 production positive regulation of interleukin-4 production interleukin-4 production positive regulation of cell population proliferation regulation of leukocyte proliferation positive regulation of lymphocyte proliferation positive regulation of T cell proliferation regulation of cell population proliferation positive regulation of leukocyte proliferation positive regulation of mononuclear cell proliferation T cell proliferation regulation of lymphocyte proliferation regulation of T cell proliferation regulation of mononuclear cell proliferation	cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane membrane-bounded organelle intracellular organelle intracellular anatomical structure Golgi apparatus organelle cytoplasm intracellular membrane-bounded organelle cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane membrane-bounded organelle intracellular organelle intracellular anatomical structure Golgi apparatus organelle cytoplasm intracellular membrane-bounded organelle endomembrane system extracellular region extracellular space
D [auth H], F [auth K], H [auth X]	IMMUNOGLOBULIN H	-	-	-
E [auth L], G [auth M], I [auth Y]	IMMUNOGLOBULIN L	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C	IPR008983	Tumour necrosis factor-like domain superfamily	Homologous Superfamily
A, B, C	IPR006052	Tumour necrosis factor domain	Domain
A, B, C	IPR021184	Tumour necrosis factor, conserved site	Conserved Site
A, B, C	IPR003263	CD40 ligand	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B, C	Pharos: P29965	hyper-IgM syndrome type 1 amyotrophic lateral sclerosis autoimmune disease allergic disease Chromosome Breakage coronary artery disease pulmonary hypertension pneumonia pneumonitis hyper-IgM syndrome X-linked acrogigantism due to Xq26 microduplication cancer hematologic disease lymphatic system disease

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.