Annotations: 9ERT

Mouse CNPase catalytic domain with nano body 5E

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	LigT-like	8077322	3001408	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	RRM_1	e9ertA01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: RRM_1	ECOD (v294.2)
B	RRM_1	e9ertB01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: RRM_1	ECOD (v294.2)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B	Heavy Chain	IGHV1	-	2',3'-cyclic-nucleotide 3'-phosphodiesterase	SAbDab (2026-05-08)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF05881	2',3'-cyclic nucleotide 3'-phosphodiesterase (CNP or CNPase) (CNPase)	2',3'-cyclic nucleotide 3'-phosphodiesterase (CNP or CNPase)	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	2',3'-cyclic-nucleotide 3'-phosphodiesterase	phosphoric ester hydrolase activity hydrolase activity, acting on ester bonds phosphoric diester hydrolase activity hydrolase activity 2',3'-cyclic-nucleotide 3'-phosphodiesterase activity cyclic-nucleotide phosphodiesterase activity catalytic activity RNA binding binding nucleic acid binding nucleoside phosphate binding cyclic nucleotide binding nucleotide binding heterocyclic compound binding phosphoric ester hydrolase activity hydrolase activity, acting on ester bonds phosphoric diester hydrolase activity hydrolase activity 2',3'-cyclic-nucleotide 3'-phosphodiesterase activity cyclic-nucleotide phosphodiesterase activity catalytic activity RNA binding binding nucleic acid binding nucleoside phosphate binding cyclic nucleotide binding nucleotide binding heterocyclic compound binding small molecule binding	adult locomotory behavior behavior multicellular organismal process adult behavior locomotory behavior developmental process cellular developmental process nervous system development multicellular organism development neurogenesis central nervous system development gliogenesis oligodendrocyte differentiation glial cell differentiation adult locomotory behavior behavior multicellular organismal process adult behavior locomotory behavior developmental process cellular developmental process nervous system development multicellular organism development neurogenesis central nervous system development gliogenesis oligodendrocyte differentiation glial cell differentiation cell differentiation anatomical structure development cellular process system development response to stimulus response to chemical response to toxic substance axonogenesis cell projection organization plasma membrane bounded cell projection morphogenesis cell development neuron projection development cell morphogenesis cellular component organization cell projection morphogenesis neuron differentiation neuron projection morphogenesis cellular component organization or biogenesis plasma membrane bounded cell projection organization axon development cell morphogenesis involved in neuron differentiation generation of neurons anatomical structure morphogenesis neuron development nucleoside phosphate metabolic process catabolic process organophosphate catabolic process primary metabolic process cyclic nucleotide catabolic process nucleoside phosphate catabolic process nucleotide metabolic process cyclic nucleotide metabolic process nucleobase-containing compound catabolic process nucleobase-containing compound metabolic process organophosphate metabolic process nucleobase-containing small molecule metabolic process phosphate-containing compound metabolic process metabolic process small molecule metabolic process phosphorus metabolic process nucleotide catabolic process biological regulation regulation of membrane permeability regulation of biological quality regulation of mitochondrial membrane permeability	membrane-bounded organelle mitochondrial membrane intracellular anatomical structure organelle inner membrane mitochondrion membrane intracellular membrane-bounded organelle mitochondrial inner membrane intracellular organelle organelle envelope cellular anatomical structure organelle mitochondrial envelope cytoplasm membrane-bounded organelle mitochondrial membrane intracellular anatomical structure organelle inner membrane mitochondrion membrane intracellular membrane-bounded organelle mitochondrial inner membrane intracellular organelle organelle envelope cellular anatomical structure organelle mitochondrial envelope cytoplasm organelle membrane cell projection pseudopodium plasma membrane bounded cell projection myelin sheath pigment granule intracellular vesicle melanosome cytoplasmic vesicle vesicle myelin sheath abaxonal region myelin sheath adaxonal region actin-based cell projection microvillus perinuclear region of cytoplasm organelle outer membrane bounding membrane of organelle mitochondrial outer membrane outer membrane polymeric cytoskeletal fiber intracellular membraneless organelle cytoskeleton membraneless organelle supramolecular fiber microtubule supramolecular polymer supramolecular complex microtubule cytoskeleton
B	Chains: B	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR008431	Cyclic nucleotide phosphodiesterase	Family
A	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
A	IPR047325	Cyclic nucleotide phosphodiesterase, catalytic domain	Domain
A	IPR009097	Cyclic phosphodiesterase	Homologous Superfamily

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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.