Annotations: 1ZBU

crystal structure of full-length 3'-exonuclease

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D	SCOP2B Superfamily	Ribonuclease H-like	8043204	3000143	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Ribonuclease H-like	8043204	3000143	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Ribonuclease H-like	8043204	3000143	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Ribonuclease H-like	8043204	3000143	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)
D	ACR_tran	e1zbuD1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: ACR_tran	ECOD (v295.2)
C	ACR_tran	e1zbuC1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: ACR_tran	ECOD (v295.2)
B	POC3_POC4	e1zbuB3	A: alpha arrays	X: Fusion glycoprotein F2	H: Fusion glycoprotein F2	T: Fusion glycoprotein F2	F: POC3_POC4	ECOD (v295.2)
A	ACR_tran	e1zbuA1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: ACR_tran	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D	3.30.420.10	Alpha Beta	2-Layer Sandwich	Nucleotidyltransferase	domain 5	CATH (4.3.0)
C	3.30.420.10	Alpha Beta	2-Layer Sandwich	Nucleotidyltransferase	domain 5	CATH (4.3.0)
B	1.10.720.30	Mainly Alpha	Orthogonal Bundle	Transcription Termination Factor Rho, Rna-binding Domain	Chain A, Domain 1	CATH (4.3.0)
B	3.30.420.10	Alpha Beta	2-Layer Sandwich	Nucleotidyltransferase	domain 5	CATH (4.3.0)
A	3.30.420.10	Alpha Beta	2-Layer Sandwich	Nucleotidyltransferase	domain 5	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF00929	Exonuclease (RNase_T)	Exonuclease	This family includes a variety of exonuclease proteins, such as ribonuclease T and the epsilon subunit of DNA polymerase III.;	Domain
A, B, C, D	PF02037	SAP domain (SAP)	SAP domain	The SAP (after SAF-A/B, Acinus and PIAS) motif is a putative DNA/RNA binding domain found in diverse nuclear and cytoplasmic proteins.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	3'-5' exonuclease ERI1	hydrolase activity, acting on ester bonds nuclease activity catalytic activity, acting on a nucleic acid 3'-5' exonuclease activity hydrolase activity exonuclease activity catalytic activity 3'-5'-RNA exonuclease activity catalytic activity, acting on RNA RNA exonuclease activity, producing 5'-phosphomonoesters RNA exonuclease activity RNA nuclease activity exoribonuclease II activity pre-mRNA binding hydrolase activity, acting on ester bonds nuclease activity catalytic activity, acting on a nucleic acid 3'-5' exonuclease activity hydrolase activity exonuclease activity catalytic activity 3'-5'-RNA exonuclease activity catalytic activity, acting on RNA RNA exonuclease activity, producing 5'-phosphomonoesters RNA exonuclease activity RNA nuclease activity exoribonuclease II activity pre-mRNA binding RNA binding binding nucleic acid binding histone pre-mRNA stem-loop binding rRNA binding ribonucleoprotein complex binding protein-containing complex binding ribosome binding	regulation of cellular process negative regulation of biological process negative regulation of heterochromatin formation positive regulation of macromolecule biosynthetic process cellular component biogenesis positive regulation of metabolic process cellular component assembly chromatin organization positive regulation of macromolecule metabolic process regulation of heterochromatin formation regulation of biological process regulation of chromatin organization negative regulation of cellular component organization negative regulation of metabolic process regulation of cellular process negative regulation of biological process negative regulation of heterochromatin formation positive regulation of macromolecule biosynthetic process cellular component biogenesis positive regulation of metabolic process cellular component assembly chromatin organization positive regulation of macromolecule metabolic process regulation of heterochromatin formation regulation of biological process regulation of chromatin organization negative regulation of cellular component organization negative regulation of metabolic process heterochromatin organization negative regulation of regulatory ncRNA-mediated heterochromatin formation regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of macromolecule biosynthetic process regulation of macromolecule biosynthetic process metabolic process negative regulation of gene expression, epigenetic macromolecule metabolic process regulation of metabolic process regulation of cellular component organization positive regulation of biological process regulation of regulatory ncRNA-mediated heterochromatin formation negative regulation of chromatin organization cellular component organization regulation of gene silencing by regulatory ncRNA positive regulation of biosynthetic process negative regulation of cellular process chromatin remodeling cellular component organization or biogenesis positive regulation of cellular process negative regulation of macromolecule metabolic process regulation of biosynthetic process heterochromatin formation epigenetic regulation of gene expression negative regulation of gene silencing by regulatory ncRNA biological regulation regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulatory ncRNA-mediated gene silencing regulatory ncRNA-mediated heterochromatin formation positive regulation of gene expression negative regulation of biosynthetic process regulation of heterochromatin organization cellular process negative regulation of heterochromatin organization ribonucleoprotein complex biogenesis RNA metabolic process primary metabolic process rRNA processing nucleobase-containing compound biosynthetic process nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process nucleic acid biosynthetic process ribosome biogenesis rRNA 3'-end processing RNA 3'-end processing RNA processing rRNA metabolic process exonucleolytic trimming to generate mature 3'-end of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) maturation of 5.8S rRNA maturation of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA)	membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membraneless organelle intracellular membrane-bounded organelle nucleolus intracellular organelle lumen intracellular organelle cellular anatomical structure organelle lumen organelle membraneless organelle nuclear lumen membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membraneless organelle intracellular membrane-bounded organelle nucleolus intracellular organelle lumen intracellular organelle cellular anatomical structure organelle lumen organelle membraneless organelle nuclear lumen histone pre-mRNA 3'end processing complex protein-containing complex nuclear protein-containing complex ribonucleoprotein complex cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR036397	Ribonuclease H superfamily	Homologous Superfamily
A, B, C, D	IPR047201	ERI-1-like, DEDDh 3'-5' exonuclease domain	Domain
A, B, C, D	IPR013520	Ribonuclease H-like domain	Domain
A, B, C, D	IPR003034	SAP domain	Domain
A, B, C, D	IPR036361	SAP domain superfamily	Homologous Superfamily
A, B, C, D	IPR051274	3'-5' Exoribonuclease	Family
A, B, C, D	IPR012337	Ribonuclease H-like superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B, C, D	: Q8IV48	atypical teratoid rhabdoid tumor glioblastoma malignant glioma pilocytic astrocytoma subependymal giant cell astrocytoma breast cancer large cell medulloblastoma medulloblastoma primitive neuroectodermal tumor ulcerative colitis chronic obstructive pulmonary disease malignant ependymoma ovarian cancer Sjogren syndrome

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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.