Annotations: 3BK1

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Lactamase_B_6_1	e3bk1A1	A: a+b four layers	X: Metallo-hydrolase/oxidoreductase (From Topology)	H: Metallo-hydrolase/oxidoreductase (From Topology)	T: Metallo-hydrolase/oxidoreductase	F: Lactamase_B_6_1	ECOD (1.6)
A	RnjA	e3bk1A3	A: a+b complex topology	X: Flagellar protein FlgA N-terminal domain-like	H: RNase J C-terminal domain (From Topology)	T: RNase J C-terminal domain	F: RnjA	ECOD (1.6)
A	MG423	e3bk1A2	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: MG423	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.60.15.10	Alpha Beta	4-Layer Sandwich	Metallo-beta-lactamase	Chain A	CATH (4.3.0)
A	3.40.50.10710	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Metallo-hydrolase/oxidoreductase	CATH (4.3.0)
A	3.10.20.580	Alpha Beta	Roll	Ubiquitin-like (UB roll)		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF07521	Zn-dependent metallo-hydrolase RNA specificity domain (RMMBL)	Zn-dependent metallo-hydrolase RNA specificity domain	-	Motif
A	PF17770	Ribonuclease J C-terminal domain (RNase_J_C)	Ribonuclease J C-terminal domain	This domain is found at the C-terminus of Ribonuclease J proteins. Its function is unknown, but deletion of this domain causes dissociation to monomers [2].	Domain
A	PF22505	Ribonuclease J, beta-CASP domain (RNase_J_b_CASP)	Ribonuclease J, beta-CASP domain	This domain is found in Ribonuclease J from Thermus thermophilus (RNaseJ) and similar bacterial proteins. RNaseJ is an RNase that has endonuclease and possibly 5'-3' exonuclease activity. It is probably involved in maturation of rRNA and in some orga ...	This domain is found in Ribonuclease J from Thermus thermophilus (RNaseJ) and similar bacterial proteins. RNaseJ is an RNase that has endonuclease and possibly 5'-3' exonuclease activity. It is probably involved in maturation of rRNA and in some organisms also mRNA maturation and/or decay. This protein shows three globular domains: the beta lactamase core (formed by two separate regions, Pfam:PF12706 and Pfam:PF07521), the beta-CASP (this entry) and the C-terminal domain (Pfam: PF17770). This domain consists of a central five-stranded parallel beta-sheet that is surrounded by five alpha-helices [1,2].	Domain
A	PF12706	Beta-lactamase superfamily domain (Lactamase_B_2)	Beta-lactamase superfamily domain	This family is part of the beta-lactamase superfamily and is related to Pfam:PF00753.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Metal dependent hydrolase	endonuclease activity nuclease activity hydrolase activity, acting on ester bonds catalytic activity, acting on RNA RNA endonuclease activity catalytic activity, acting on a nucleic acid RNA nuclease activity hydrolase activity catalytic activity 5'-3' RNA exonuclease activity 5'-3' exonuclease activity RNA exonuclease activity, producing 5'-phosphomonoesters RNA exonuclease activity exonuclease activity, active with either ribo- or deoxyribonucleic acids and producing 5'-phosphomonoesters endonuclease activity nuclease activity hydrolase activity, acting on ester bonds catalytic activity, acting on RNA RNA endonuclease activity catalytic activity, acting on a nucleic acid RNA nuclease activity hydrolase activity catalytic activity 5'-3' RNA exonuclease activity 5'-3' exonuclease activity RNA exonuclease activity, producing 5'-phosphomonoesters RNA exonuclease activity exonuclease activity, active with either ribo- or deoxyribonucleic acids and producing 5'-phosphomonoesters exonuclease activity cation binding transition metal ion binding zinc ion binding ion binding binding metal ion binding small molecule binding RNA binding organic cyclic compound binding nucleic acid binding identical protein binding protein binding	ribonucleoprotein complex biogenesis cellular biosynthetic process cellular metabolic process RNA metabolic process primary metabolic process rRNA processing gene expression nucleobase-containing compound biosynthetic process macromolecule biosynthetic process nucleic acid metabolic process nucleobase-containing compound metabolic process cellular component biogenesis RNA biosynthetic process ribosome biogenesis nucleic acid biosynthetic process ribonucleoprotein complex biogenesis cellular biosynthetic process cellular metabolic process RNA metabolic process primary metabolic process rRNA processing gene expression nucleobase-containing compound biosynthetic process macromolecule biosynthetic process nucleic acid metabolic process nucleobase-containing compound metabolic process cellular component biogenesis RNA biosynthetic process ribosome biogenesis nucleic acid biosynthetic process biosynthetic process metabolic process cellular process macromolecule metabolic process cellular component organization or biogenesis RNA processing rRNA metabolic process	intracellular anatomical structure cytoplasm cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR001279	Metallo-beta-lactamase	Domain
A	IPR011108	Zn-dependent metallo-hydrolase, RNA specificity domain	Domain
A	IPR004613	Ribonuclease J	Family
A	IPR036866	Ribonuclease Z/Hydroxyacylglutathione hydrolase-like	Homologous Superfamily
A	IPR030854	Ribonuclease J, bacteria	Family
A	IPR041636	Ribonuclease J, C-terminal	Domain
A	IPR042173	Ribonuclease J, domain 2	Homologous Superfamily

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.