7O52 | pdb_00007o52

CD22 d6-d7 in complex with Fab m971

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
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)
B [auth L]	d7o52l_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A [auth H]	d7o52h1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A [auth H]	d7o52h2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(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 [auth U]	Hormone_recep	e7o52U1	A: a/b three-layered sandwiches	X: CNF1/YfiH-like putative cysteine hydrolases	H: Bromodomain	T: Bromodomain	F: Hormone_recep	ECOD (v294.1)
B [auth L]	Hormone_recep	e7o52L1	A: a/b three-layered sandwiches	X: CNF1/YfiH-like putative cysteine hydrolases	H: Bromodomain	T: Bromodomain	F: Hormone_recep	ECOD (v294.1)
A [auth H]	Hormone_recep	e7o52H1	A: a/b three-layered sandwiches	X: CNF1/YfiH-like putative cysteine hydrolases	H: Bromodomain	T: Bromodomain	F: Hormone_recep	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C [auth U]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
B [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
A [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth L]	Light Chain	IGKV1	Kappa	cd22 d6-d7 ig domains	SAbDab (2026-04-17)
A [auth H]	Heavy Chain	IGHV6	-	cd22 d6-d7 ig domains	SAbDab (2026-04-17)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C [auth U]	PF13927	Immunoglobulin domain (Ig_3)	Immunoglobulin domain	This family contains immunoglobulin-like domains.	Domain
C [auth U]	PF13895	Immunoglobulin domain (Ig_2)	Immunoglobulin domain	This domain contains immunoglobulin-like domains.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth U]	CD22 d6-d7 Ig domains	protein-containing complex binding binding immunoglobulin binding IgM binding sialic acid binding organic acid binding ion binding anion binding carboxylic acid binding carbohydrate derivative binding small molecule binding protein binding signaling receptor binding protein phosphatase binding protein-containing complex binding binding immunoglobulin binding IgM binding sialic acid binding organic acid binding ion binding anion binding carboxylic acid binding carbohydrate derivative binding small molecule binding protein binding signaling receptor binding protein phosphatase binding phosphatase binding enzyme binding carbohydrate binding CD4 receptor binding	regulation of localization import into cell regulation of biological process regulation of cellular process regulation of cellular component organization regulation of transport transport biological regulation regulation of vesicle-mediated transport establishment of localization vesicle-mediated transport cellular component organization localization cellular process regulation of localization import into cell regulation of biological process regulation of cellular process regulation of cellular component organization regulation of transport transport biological regulation regulation of vesicle-mediated transport establishment of localization vesicle-mediated transport cellular component organization localization cellular process cellular component organization or biogenesis endocytosis regulation of endocytosis regulation of immune effector process immunoglobulin production negative regulation of biological process negative regulation of cellular process regulation of immune system process negative regulation of macromolecule metabolic process negative regulation of immunoglobulin production regulation of biosynthetic process production of molecular mediator of immune response negative regulation of metabolic process negative regulation of immune effector process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process immune effector process regulation of gene expression negative regulation of production of molecular mediator of immune response negative regulation of gene expression biosynthetic process regulation of immunoglobulin production negative regulation of immune system process negative regulation of biosynthetic process immune system process negative regulation of macromolecule biosynthetic process regulation of macromolecule biosynthetic process metabolic process macromolecule metabolic process regulation of production of molecular mediator of immune response regulation of metabolic process multicellular organismal process B cell activation cell activation lymphocyte activation leukocyte activation response to stimulus regulation of response to stimulus immune response regulation of immune response cellular response to stimulus regulation of B cell receptor signaling pathway immune response-regulating cell surface receptor signaling pathway signaling negative regulation of signaling positive regulation of biological process regulation of signal transduction regulation of antigen receptor-mediated signaling pathway negative regulation of antigen receptor-mediated signaling pathway negative regulation of cell communication cell communication negative regulation of B cell receptor signaling pathway positive regulation of response to stimulus immune response-activating signaling pathway immune response-regulating signaling pathway positive regulation of immune response signal transduction positive regulation of immune system process regulation of signaling cell surface receptor signaling pathway immune response-activating cell surface receptor signaling pathway negative regulation of response to stimulus B cell receptor signaling pathway negative regulation of signal transduction regulation of cell communication antigen receptor-mediated signaling pathway activation of immune response cell adhesion negative regulation of intracellular signal transduction intracellular signal transduction regulation of intracellular signal transduction intracellular signaling cassette regulation of calcium-mediated signaling negative regulation of calcium-mediated signaling calcium-mediated signaling regulation of leukocyte activation regulation of cell activation leukocyte proliferation regulation of B cell proliferation lymphocyte proliferation regulation of B cell activation regulation of multicellular organismal process regulation of lymphocyte proliferation regulation of leukocyte proliferation cell population proliferation B cell proliferation regulation of cell population proliferation mononuclear cell proliferation regulation of mononuclear cell proliferation regulation of lymphocyte activation	cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle vesicle cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle vesicle extracellular membrane-bounded organelle intracellular anatomical structure cytoplasm early endosome endosome intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle cytoplasmic vesicle recycling endosome somatodendritic compartment neuronal cell body membrane cell body cell body membrane neuronal cell body
B [auth L]	m971 Fab Light chain	-	-	-
A [auth H]	m971 Fab Heavy chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C [auth U]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
C [auth U]	IPR003598	Immunoglobulin subtype 2	Domain
C [auth U]	IPR056386	B-cell receptor CD22, first Ig-like domain	Domain
C [auth U]	IPR003599	Immunoglobulin domain subtype	Domain
C [auth U]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
C [auth U]	IPR013162	CD80-like, immunoglobulin C2-set	Domain
C [auth U]	IPR007110	Immunoglobulin-like domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
C [auth U]	Pharos: P20273	B-cell chronic lymphocytic leukemia interstitial cystitis malignant ependymoma nasopharyngeal carcinoma Pre B-cell acute lymphoblastic leukemia Sjogren syndrome cutaneous lupus erythematosus leukemia malignant glioma osteosarcoma progressive supranuclear palsy hairy cell leukemia lymphoma medulloblastoma Pick disease B-cell chronic lymphocytic leukemia interstitial cystitis malignant ependymoma nasopharyngeal carcinoma Pre B-cell acute lymphoblastic leukemia Sjogren syndrome cutaneous lupus erythematosus leukemia malignant glioma osteosarcoma progressive supranuclear palsy hairy cell leukemia lymphoma medulloblastoma Pick disease psoriasis

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.