3QA3 | pdb_00003qa3

Crystal Structure of A-domain in complex with 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
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)
E [auth B]	d3qa3b1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
E [auth B]	d3qa3b2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
K	d3qa3k1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
K	d3qa3k2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
H	d3qa3h1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
H	d3qa3h2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
B [auth D]	d3qa3d1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
B [auth D]	d3qa3d2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
C [auth G]	d3qa3g_	Alpha and beta proteins (a/b)	vWA-like	vWA-like	Integrin A (or I) domain	Integrin alpha M (CR3, CD11b/CD18, Mac-1 alpha subunit)	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
L	d3qa3l_	Alpha and beta proteins (a/b)	vWA-like	vWA-like	Integrin A (or I) domain	Integrin alpha M (CR3, CD11b/CD18, Mac-1 alpha subunit)	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
I	d3qa3i_	Alpha and beta proteins (a/b)	vWA-like	vWA-like	Integrin A (or I) domain	Integrin alpha M (CR3, CD11b/CD18, Mac-1 alpha subunit)	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
F [auth E]	d3qa3e_	Alpha and beta proteins (a/b)	vWA-like	vWA-like	Integrin A (or I) domain	Integrin alpha M (CR3, CD11b/CD18, Mac-1 alpha subunit)	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
G [auth F]	d3qa3f1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
G [auth F]	d3qa3f2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
J	d3qa3j1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
J	d3qa3j2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
D [auth A]	d3qa3a1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
D [auth A]	d3qa3a2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
A [auth C]	d3qa3c1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
A [auth C]	d3qa3c2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	(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)
C [auth G]	SCOP2B Superfamily	vWA-like	8033178	3000832	SCOP2B (2022-06-29)
L	SCOP2B Superfamily	vWA-like	8033178	3000832	SCOP2B (2022-06-29)
I	SCOP2B Superfamily	vWA-like	8033178	3000832	SCOP2B (2022-06-29)
F [auth E]	SCOP2B Superfamily	vWA-like	8033178	3000832	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
E [auth B]	e3qa3B1	A: Alpha-beta plaits	X: Phage tail protein-like	H: Transmembrane protein 14A	T: PK_Tyr_Ser-Thr	F:	ECOD (20:10:01)
K	e3qa3K3	A: Subtilisin-like	X: Subtilisin-like	H: Subtilisin-like	T: Ig_2	F:	ECOD (20:10:01)
H	e3qa3H3	A: Subtilisin-like	X: Subtilisin-like	H: Subtilisin-like	T: Ig_2	F:	ECOD (20:10:01)
B [auth D]	e3qa3D3	A: Subtilisin-like	X: Subtilisin-like	H: Subtilisin-like	T: Ig_2	F:	ECOD (20:10:01)
C [auth G]	e3qa3G1	A: Alpha-beta plaits	X: Phage tail protein-like	H: Transmembrane protein 14A	T: PK_Tyr_Ser-Thr	F:	ECOD (20:10:01)
L	e3qa3L1	A: Alpha-beta plaits	X: Phage tail protein-like	H: Transmembrane protein 14A	T: PK_Tyr_Ser-Thr	F:	ECOD (20:10:01)
I	e3qa3I1	A: Alpha-beta plaits	X: Phage tail protein-like	H: Transmembrane protein 14A	T: PK_Tyr_Ser-Thr	F:	ECOD (20:10:01)
F [auth E]	e3qa3E1	A: Alpha-beta plaits	X: Phage tail protein-like	H: Transmembrane protein 14A	T: PK_Tyr_Ser-Thr	F:	ECOD (20:10:01)
G [auth F]	e3qa3F1	A: Alpha-beta plaits	X: Phage tail protein-like	H: Transmembrane protein 14A	T: PK_Tyr_Ser-Thr	F:	ECOD (20:10:01)
J	e3qa3J1	A: Alpha-beta plaits	X: Phage tail protein-like	H: Transmembrane protein 14A	T: PK_Tyr_Ser-Thr	F:	ECOD (20:10:01)
D [auth A]	e3qa3A1	A: Alpha-beta plaits	X: Phage tail protein-like	H: Transmembrane protein 14A	T: PK_Tyr_Ser-Thr	F:	ECOD (20:10:01)
A [auth C]	e3qa3C1	A: Alpha-beta plaits	X: Phage tail protein-like	H: Transmembrane protein 14A	T: PK_Tyr_Ser-Thr	F:	ECOD (20:10:01)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
E [auth B]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
K	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
H	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B [auth D]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
C [auth G]	3.40.50.410	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	von Willebrand factor, type A domain	CATH (4.3.0)
L	3.40.50.410	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	von Willebrand factor, type A domain	CATH (4.3.0)
I	3.40.50.410	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	von Willebrand factor, type A domain	CATH (4.3.0)
F [auth E]	3.40.50.410	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	von Willebrand factor, type A domain	CATH (4.3.0)
G [auth F]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
J	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
D [auth A]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A [auth C]	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 D], E [auth B], H, K	Antibody Fab Fragment	VH-CH1	Mus musculus (house mouse)	IGHV14-302, IGHJ401, IGHG1*01	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202609-0)
C [auth G], F [auth E], I, L	Integrin alpha-M	INTEGRIN-ALPHA-M	Homo sapiens (human)	ALPHA-M	I-LIKE-DOMAIN I-DOMAIN	RPI	(INTEGRIN-ALPHA-M)	IMGT (202609-0)
A [auth C], D [auth A], G [auth F], J	Antibody Fab Fragment	L-KAPPA	Mus musculus (house mouse)	IGKV8-3001, IGKJ501, IGKC01, IGKC02	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 D], E [auth B], H, K	Heavy Chain	IGHV14	-	integrin alpha-m	SAbDab (2026-03-13)
A [auth C], D [auth A], G [auth F], J	Light Chain	IGKV8	Kappa	integrin alpha-m	SAbDab (2026-03-13)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C [auth G], F [auth E], I, L	PF00092	von Willebrand factor type A domain (VWA)	von Willebrand factor type A domain		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B [auth D], E [auth B], H, K	Antibody Heavy chain	-	-	-
C [auth G], F [auth E], I, L	Integrin alpha-M	amyloid-beta binding binding peptide binding protein binding heat shock protein binding opsonin binding complement component C3b binding complement binding cation binding ion binding metal ion binding small molecule binding molecular transducer activity signaling receptor activity amyloid-beta binding binding peptide binding protein binding heat shock protein binding opsonin binding complement component C3b binding complement binding cation binding ion binding metal ion binding small molecule binding molecular transducer activity signaling receptor activity cargo receptor activity cell adhesion molecule binding protein-containing complex binding integrin binding signaling receptor binding	regulation of biological process regulation of cellular process reactive oxygen species metabolic process biological regulation positive regulation of biological process regulation of superoxide metabolic process positive regulation of reactive oxygen species metabolic process superoxide metabolic process positive regulation of metabolic process superoxide anion generation metabolic process cellular process positive regulation of superoxide anion generation regulation of superoxide anion generation regulation of biological process regulation of cellular process reactive oxygen species metabolic process biological regulation positive regulation of biological process regulation of superoxide metabolic process positive regulation of reactive oxygen species metabolic process superoxide metabolic process positive regulation of metabolic process superoxide anion generation metabolic process cellular process positive regulation of superoxide anion generation regulation of superoxide anion generation regulation of metabolic process regulation of reactive oxygen species metabolic process positive regulation of cellular process membrane organization import into cell transport establishment of localization vesicle-mediated transport cellular component organization localization phagocytosis, engulfment membrane invagination phagocytosis cellular component organization or biogenesis endocytosis plasma membrane invagination response to stimulus response to stress response to ischemia response to ketone response to curcumin response to ether response to chemical response to oxygen-containing compound biological process involved in interspecies interaction between organisms immune response response to other organism defense response defense response to symbiont response to external stimulus response to biotic stimulus immune system process defense response to other organism innate immune response response to external biotic stimulus developmental process multicellular organismal process visual system development pattern specification process nervous system development regionalization multicellular organism development central nervous system development anatomical structure development sensory system development vertebrate eye-specific patterning system development cell adhesion negative regulation of dopamine metabolic process regulation of amine metabolic process negative regulation of metabolic process negative regulation of biological process dopamine metabolic process primary metabolic process catechol-containing compound metabolic process regulation of primary metabolic process amine metabolic process catecholamine metabolic process phenol-containing compound metabolic process negative regulation of cellular process negative regulation of amine metabolic process regulation of catecholamine metabolic process biogenic amine metabolic process regulation of dopamine metabolic process heterotypic cell-cell adhesion cell-cell adhesion regulation of immune effector process neutrophil activation regulation of localization regulation of myeloid leukocyte mediated immunity positive regulation of leukocyte mediated immunity regulated exocytosis cell activation involved in immune response leukocyte degranulation myeloid leukocyte mediated immunity myeloid leukocyte activation neutrophil activation involved in immune response positive regulation of leukocyte degranulation positive regulation of regulated secretory pathway positive regulation of immune response establishment of localization in cell leukocyte mediated immunity regulation of immune system process positive regulation of immune system process immune effector process regulation of secretion regulation of leukocyte mediated immunity exocytosis regulation of response to stimulus positive regulation of myeloid leukocyte mediated immunity regulation of immune response cellular localization positive regulation of secretion by cell positive regulation of exocytosis leukocyte activation regulation of regulated secretory pathway positive regulation of response to stimulus neutrophil mediated immunity secretion by cell regulation of secretion by cell positive regulation of secretion regulation of neutrophil degranulation leukocyte activation involved in immune response neutrophil degranulation positive regulation of immune effector process regulation of leukocyte degranulation secretion regulation of transport cell activation export from cell regulation of vesicle-mediated transport myeloid cell activation involved in immune response positive regulation of transport regulation of exocytosis positive regulation of neutrophil degranulation granulocyte activation macrophage activation leukocyte activation involved in inflammatory response microglial cell activation inflammatory response glial cell activation neuroinflammatory response establishment of protein localization regulation of protein localization protein targeting positive regulation of establishment of protein localization regulation of protein targeting to membrane intracellular protein localization establishment of protein localization to membrane regulation of establishment of protein localization localization within membrane protein targeting to membrane regulation of cellular localization regulation of protein targeting macromolecule localization positive regulation of protein targeting to membrane receptor-mediated endocytosis cell-matrix adhesion cell-substrate adhesion cellular developmental process ectoderm development cell differentiation ectodermal cell differentiation tissue development cellular component disassembly complement-mediated synapse pruning cell junction organization cell junction disassembly synapse pruning synapse organization cellular response to stimulus immune response-regulating cell surface receptor signaling pathway complement receptor mediated signaling pathway signaling cell communication immune response-activating signaling pathway immune response-regulating signaling pathway signal transduction cell surface receptor signaling pathway immune response-activating cell surface receptor signaling pathway activation of immune response amyloid-beta clearance integrin-mediated signaling pathway microglial cell mediated cytotoxicity positive regulation of leukocyte mediated cytotoxicity regulation of leukocyte mediated cytotoxicity positive regulation of microglial cell mediated cytotoxicity leukocyte mediated cytotoxicity regulation of cell killing positive regulation of cell killing regulation of microglial cell mediated cytotoxicity cell killing head development forebrain development animal organ development brain development response to mechanical stimulus response to abiotic stimulus response to amine response to nitrogen compound response to amphetamine response to bacterium response to Gram-positive bacterium response to lipid response to estradiol	membrane-bounded organelle intracellular anatomical structure membrane intracellular vesicle intracellular membrane-bounded organelle endomembrane system specific granule membrane intracellular organelle cytoplasmic vesicle membrane cellular anatomical structure bounding membrane of organelle vesicle membrane cytoplasmic vesicle organelle membrane-bounded organelle intracellular anatomical structure membrane intracellular vesicle intracellular membrane-bounded organelle endomembrane system specific granule membrane intracellular organelle cytoplasmic vesicle membrane cellular anatomical structure bounding membrane of organelle vesicle membrane cytoplasmic vesicle organelle secretory granule secretory vesicle cytoplasm vesicle organelle membrane secretory granule membrane specific granule cell periphery cell surface plasma membrane external side of plasma membrane side of membrane extracellular exosome extracellular vesicle extracellular organelle extracellular region extracellular space extracellular membrane-bounded organelle tertiary granule membrane tertiary granule protein-containing complex plasma membrane protein complex membrane protein complex receptor complex integrin complex plasma membrane signaling receptor complex protein complex involved in cell adhesion integrin alphaM-beta2 complex membrane microdomain membrane raft plasma membrane raft plasma membrane region
A [auth C], D [auth A], G [auth F], J	Antibody Light chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C [auth G], F [auth E], I, L	IPR013517	FG-GAP repeat	Repeat
C [auth G], F [auth E], I, L	IPR036465	von Willebrand factor A-like domain superfamily	Homologous Superfamily
C [auth G], F [auth E], I, L	IPR013649	Integrin alpha, first immunoglubulin-like domain	Domain
C [auth G], F [auth E], I, L	IPR002035	von Willebrand factor, type A	Domain
C [auth G], F [auth E], I, L	IPR048285	Integrin alpha, second immunoglobulin-like domain	Domain
C [auth G], F [auth E], I, L	IPR032695	Integrin domain superfamily	Homologous Superfamily
C [auth G], F [auth E], I, L	IPR013519	Integrin alpha beta-propellor	Repeat
C [auth G], F [auth E], I, L	IPR000413	Integrin alpha chain	Family
C [auth G], F [auth E], I, L	IPR048633	Integrin alpha-X-like, third Ig-like domain	Domain
C [auth G], F [auth E], I, L	IPR028994	Integrin alpha, N-terminal	Homologous Superfamily
C [auth G], F [auth E], I, L	IPR018184	Integrin alpha chain, C-terminal cytoplasmic region, conserved site	Conserved Site

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
C [auth G], F [auth E], I, L	Pharos: P11215	systemic lupus erythematosus acute promyelocytic leukemia systemic lupus erythematosus, susceptibility to, 6 IgA glomerulonephritis allergic contact dermatitis Crohn ileitis systemic sclerosis interstitial cystitis Libman-Sacks Disease lung disease MALT lymphoma arthritic joint disease non-small cell lung carcinoma bipolar disorder pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia systemic lupus erythematosus acute promyelocytic leukemia systemic lupus erythematosus, susceptibility to, 6 IgA glomerulonephritis allergic contact dermatitis Crohn ileitis systemic sclerosis interstitial cystitis Libman-Sacks Disease lung disease MALT lymphoma arthritic joint disease non-small cell lung carcinoma bipolar disorder pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia chronic obstructive pulmonary disease cutaneous lupus erythematosus tuberculosis Graves disease hematologic disease invasive ductal breast carcinoma lung cancer lupus erythematosus adrenal cortex carcinoma medulloblastoma astrocytic tumor osteosarcoma cancer schizophrenia colitis diffuse scleroderma ulcerative colitis Hashimoto thyroiditis large cell medulloblastoma lung carcinoma malignant mesothelioma autoimmune disease ovarian cancer central nervous system lupus subependymal giant cell astrocytoma Duchenne muscular dystrophy head and neck cancer