Annotations: 6VCA

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
F [auth L]		e6vcaL1	A: alpha bundles	X: cradle loop barrel	H: N-terminal domain of poxin	T: N-terminal domain of poxin	F:	ECOD (develop294)
H [auth F]		e6vcaF1	A: alpha bundles	X: cradle loop barrel	H: N-terminal domain of poxin	T: N-terminal domain of poxin	F:	ECOD (develop294)
J [auth O]		e6vcaO1	A: alpha bundles	X: cradle loop barrel	H: N-terminal domain of poxin	T: N-terminal domain of poxin	F:	ECOD (develop294)
L [auth J]		e6vcaJ1	A: alpha bundles	X: cradle loop barrel	H: N-terminal domain of poxin	T: N-terminal domain of poxin	F:	ECOD (develop294)
E [auth H]		e6vcaH1	A: alpha bundles	X: cradle loop barrel	H: N-terminal domain of poxin	T: N-terminal domain of poxin	F:	ECOD (develop294)
G [auth E]		e6vcaE1	A: alpha bundles	X: cradle loop barrel	H: N-terminal domain of poxin	T: N-terminal domain of poxin	F:	ECOD (develop294)
I [auth P]		e6vcaP1	A: alpha bundles	X: cradle loop barrel	H: N-terminal domain of poxin	T: N-terminal domain of poxin	F:	ECOD (develop294)
K		e6vcaK1	A: alpha bundles	X: cradle loop barrel	H: N-terminal domain of poxin	T: N-terminal domain of poxin	F:	ECOD (develop294)
A		e6vcaA1	A: alpha bundles	X: cradle loop barrel	H: N-terminal domain of poxin	T: N-terminal domain of poxin	F:	ECOD (develop294)
B		e6vcaB1	A: alpha bundles	X: cradle loop barrel	H: N-terminal domain of poxin	T: N-terminal domain of poxin	F:	ECOD (develop294)
C		e6vcaC1	A: alpha bundles	X: cradle loop barrel	H: N-terminal domain of poxin	T: N-terminal domain of poxin	F:	ECOD (develop294)
D		e6vcaD1	A: alpha bundles	X: cradle loop barrel	H: N-terminal domain of poxin	T: N-terminal domain of poxin	F:	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
F [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
H [auth F]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
L [auth J]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
E [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
G [auth E]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
K	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
A	3.60.21.10	Alpha Beta	4-Layer Sandwich	Purple Acid Phosphatase	chain A, domain 2	CATH (utative)
A	3.90.780.10	Alpha Beta	Alpha-Beta Complex	5'-nucleotidase	domain 2	CATH (utative)
B	3.60.21.10	Alpha Beta	4-Layer Sandwich	Purple Acid Phosphatase	chain A, domain 2	CATH (utative)
B	3.90.780.10	Alpha Beta	Alpha-Beta Complex	5'-nucleotidase	domain 2	CATH (utative)
C	3.60.21.10	Alpha Beta	4-Layer Sandwich	Purple Acid Phosphatase	chain A, domain 2	CATH (utative)
C	3.90.780.10	Alpha Beta	Alpha-Beta Complex	5'-nucleotidase	domain 2	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
F [auth L], H [auth F], J [auth O], L [auth J]	Fab TB19, anti-CD73	L-LAMBDA	Homo sapiens (human)	IGLV8-6101, IGLJ302, IGLJ101, IGLC201, IGLC202, IGLC304	V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA	IG	FAB-GAMMA-1_LAMBDA	IMGT (202610-0)
E [auth H], G [auth E], I [auth P], K	Fab TB19, anti-CD73	1C-LIKE	Homo sapiens (human)	IGHV3-3301, IGHV3-3304, IGHJ302, IGHG101, IGHG102, IGHG104, IGHG105, IGHG112, IGHG114, IGHG113, IGHG109, IGHG110, IGHG107, IGHG111	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_LAMBDA	IMGT (202610-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
F [auth L], H [auth F], J [auth O], L [auth J]	Light Chain	IGLV8	Lambda	5'-nucleotidase, ecto (cd73), isoform cra_a	SAbDab (2026-03-20)
E [auth H], G [auth E], I [auth P], K	Heavy Chain	IGHV3	-	5'-nucleotidase, ecto (cd73), isoform cra_a	SAbDab (2026-03-20)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF00149	Calcineurin-like phosphoesterase (Metallophos)	Calcineurin-like phosphoesterase	This family includes a diverse range of phosphoesterases [1], including protein phosphoserine phosphatases, nucleotidases, sphingomyelin phosphodiesterases and 2'-3' cAMP phosphodiesterases as well as nucleases such as bacterial SbcD Swiss:P13457 or ...	This family includes a diverse range of phosphoesterases [1], including protein phosphoserine phosphatases, nucleotidases, sphingomyelin phosphodiesterases and 2'-3' cAMP phosphodiesterases as well as nucleases such as bacterial SbcD Swiss:P13457 or yeast MRE11 Swiss:P32829. The most conserved regions in this superfamily centre around the metal chelating residues.	Domain
A, B, C, D	PF02872	5'-nucleotidase, C-terminal domain (5_nucleotid_C)	5'-nucleotidase, C-terminal domain		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
F [auth L], H [auth F], J [auth O], L [auth J]	TB38 light chain	-	-	-
E [auth H], G [auth E], I [auth P], K	TB38 heavy chain	-	-	-
A, B, C, D	5'-nucleotidase, ecto (CD73), isoform CRA_a	binding nucleoside phosphate binding nucleotide binding heterocyclic compound binding small molecule binding phosphoric ester hydrolase activity 5'-deoxynucleotidase activity hydrolase activity, acting on ester bonds phosphatase activity hydrolase activity catalytic activity nucleotidase activity 5'-nucleotidase activity cation binding binding nucleoside phosphate binding nucleotide binding heterocyclic compound binding small molecule binding phosphoric ester hydrolase activity 5'-deoxynucleotidase activity hydrolase activity, acting on ester bonds phosphatase activity hydrolase activity catalytic activity nucleotidase activity 5'-nucleotidase activity cation binding transition metal ion binding zinc ion binding ion binding metal ion binding identical protein binding protein binding	nucleoside phosphate metabolic process ribose phosphate metabolic process purine nucleoside triphosphate metabolic process ATP metabolic process carbohydrate derivative metabolic process primary metabolic process nucleotide metabolic process purine-containing compound metabolic process nucleobase-containing compound metabolic process purine nucleotide metabolic process ribonucleotide metabolic process organophosphate metabolic process nucleobase-containing small molecule metabolic process purine ribonucleoside triphosphate metabolic process phosphate-containing compound metabolic process nucleoside phosphate metabolic process ribose phosphate metabolic process purine nucleoside triphosphate metabolic process ATP metabolic process carbohydrate derivative metabolic process primary metabolic process nucleotide metabolic process purine-containing compound metabolic process nucleobase-containing compound metabolic process purine nucleotide metabolic process ribonucleotide metabolic process organophosphate metabolic process nucleobase-containing small molecule metabolic process purine ribonucleoside triphosphate metabolic process phosphate-containing compound metabolic process metabolic process cellular process small molecule metabolic process nucleoside triphosphate metabolic process purine ribonucleotide metabolic process phosphorus metabolic process regulation of defense response regulation of biological process response to stimulus regulation of response to external stimulus negative regulation of inflammatory response defense response negative regulation of response to stimulus biological regulation negative regulation of biological process response to external stimulus regulation of inflammatory response regulation of response to stimulus response to stress negative regulation of response to external stimulus regulation of response to stress negative regulation of defense response inflammatory response multicellular organismal process multicellular organismal-level homeostasis homeostatic process inhibition of non-skeletal tissue mineralization anatomical structure homeostasis tissue homeostasis ribonucleotide catabolic process catabolic process organophosphate catabolic process nucleoside phosphate catabolic process ribonucleoside diphosphate metabolic process ribonucleoside diphosphate catabolic process purine ribonucleotide catabolic process nucleotide catabolic process purine nucleotide catabolic process carbohydrate derivative catabolic process ADP catabolic process purine nucleoside diphosphate metabolic process purine-containing compound catabolic process nucleobase-containing compound catabolic process ADP metabolic process nucleoside diphosphate metabolic process purine nucleoside diphosphate catabolic process purine ribonucleoside diphosphate metabolic process nucleoside diphosphate catabolic process purine ribonucleoside diphosphate catabolic process inorganic ion homeostasis chemical homeostasis monoatomic ion homeostasis calcium ion homeostasis monoatomic cation homeostasis response to chemical response to organophosphorus response to oxygen-containing compound response to nitrogen compound response to ATP response to purine-containing compound cell adhesion cell-cell adhesion leukocyte cell-cell adhesion DNA metabolic process macromolecule metabolic process nucleic acid metabolic process AMP metabolic process purine ribonucleoside monophosphate catabolic process purine nucleoside monophosphate catabolic process purine ribonucleoside monophosphate metabolic process purine nucleoside monophosphate metabolic process ribonucleoside monophosphate catabolic process nucleoside monophosphate metabolic process nucleoside monophosphate catabolic process AMP catabolic process nucleoside biosynthetic process purine-containing compound biosynthetic process purine ribonucleoside metabolic process carbohydrate derivative biosynthetic process glycosyl compound biosynthetic process small molecule biosynthetic process purine ribonucleoside biosynthetic process ribonucleoside biosynthetic process nucleobase-containing compound biosynthetic process nucleoside metabolic process nucleobase-containing small molecule biosynthetic process adenosine metabolic process biosynthetic process purine nucleoside biosynthetic process adenosine biosynthetic process purine nucleoside metabolic process ribonucleoside metabolic process	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 extracellular space 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 extracellular space vesicle extracellular membrane-bounded organelle intracellular anatomical structure cytoplasm cytosol nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen nuclear lumen

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR004843	Calcineurin-like, phosphoesterase domain	Domain
A, B, C, D	IPR036907	5'-Nucleotidase, C-terminal domain superfamily	Homologous Superfamily
A, B, C, D	IPR006146	5'-Nucleotidase, conserved site	Conserved Site
A, B, C, D	IPR006179	5'-Nucleotidase/apyrase	Family
A, B, C, D	IPR029052	Metallo-dependent phosphatase-like	Homologous Superfamily
A, B, C, D	IPR008334	5'-Nucleotidase, C-terminal	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B, C, D	Pharos: P21589	hereditary arterial and articular multiple calcification syndrome Liver Cirrhosis, Experimental lung adenocarcinoma lymphoplasmacytic lymphoma malignant pancreatic neoplasm ovarian cancer pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia atopic eczema psoriasis Barrett esophagus cutaneous lupus erythematosus endometriosis gastric neoplasm hereditary diffuse gastric adenocarcinoma large cell medulloblastoma hereditary arterial and articular multiple calcification syndrome Liver Cirrhosis, Experimental lung adenocarcinoma lymphoplasmacytic lymphoma malignant pancreatic neoplasm ovarian cancer pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia atopic eczema psoriasis Barrett esophagus cutaneous lupus erythematosus endometriosis gastric neoplasm hereditary diffuse gastric adenocarcinoma large cell medulloblastoma lung cancer malignant ependymoma medulloblastoma pancreatic intraductal papillary-mucinous carcinoma pilocytic astrocytoma atypical teratoid rhabdoid tumor Sjogren syndrome breast cancer cystic fibrosis esophageal adenocarcinoma glioblastoma invasive ductal breast carcinoma lung carcinoma non-small cell lung carcinoma pancreatic intraductal papillary-mucinous neoplasm primitive neuroectodermal tumor B-cell chronic lymphocytic leukemia cancer tuberculosis ductal breast carcinoma in situ gastric cancer juvenile dermatomyositis

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.