Annotations: 1SMX

Crystal structure of the S1 domain of RNase E from E. coli (native)

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d1smxb_	All beta proteins	OB-fold	Nucleic acid-binding proteins	Cold shock DNA-binding domain-like	S1-domain of Ribonuclease E	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
A	d1smxa_	All beta proteins	OB-fold	Nucleic acid-binding proteins	Cold shock DNA-binding domain-like	S1-domain of Ribonuclease E	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	Nucleic acid-binding proteins	8039601	3000135	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Nucleic acid-binding proteins	8039601	3000135	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)
B	AmoC	e1smxB1	A: alpha arrays	X: jelly-roll	H: Double-stranded beta-helix	T: Double-stranded beta-helix	F: AmoC	ECOD (v295.2)
A	S1	e1smxA1	A: alpha arrays	X: OB-fold	H: Nucleic acid-binding protein	T: Nucleic acid-binding protein	F: S1	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	2.40.50.140	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)	Nucleic acid-binding proteins	CATH (4.3.0)
A	2.40.50.140	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)	Nucleic acid-binding proteins	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Ribonuclease E	RNA binding binding nucleic acid binding cation binding magnesium ion binding ion binding metal ion binding small molecule binding 7S RNA binding endonuclease activity RNA endonuclease activity producing 5'-phosphomonoesters, hydrolytic mechanism catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid RNA nuclease activity RNA binding binding nucleic acid binding cation binding magnesium ion binding ion binding metal ion binding small molecule binding 7S RNA binding endonuclease activity RNA endonuclease activity producing 5'-phosphomonoesters, hydrolytic mechanism catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid RNA nuclease activity hydrolase activity ribonuclease E activity hydrolase activity, acting on ester bonds nuclease activity RNA endonuclease activity catalytic activity protein binding enzyme binding DEAD/H-box RNA helicase binding molecular adaptor activity transition metal ion binding zinc ion binding identical protein binding	cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein complex oligomerization protein-containing complex assembly cellular process cellular component organization or biogenesis protein homotetramerization protein tetramerization protein homooligomerization RNA metabolic process primary metabolic process gene expression cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein complex oligomerization protein-containing complex assembly cellular process cellular component organization or biogenesis protein homotetramerization protein tetramerization protein homooligomerization RNA metabolic process primary metabolic process gene expression nucleobase-containing compound biosynthetic process macromolecule biosynthetic process nucleic acid metabolic process tRNA metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process biosynthetic process tRNA processing metabolic process macromolecule metabolic process RNA processing catabolic process macromolecule catabolic process nucleobase-containing compound catabolic process nucleic acid catabolic process RNA catabolic process regulation of cellular process negative regulation of biological process negative regulation of cellular process negative regulation of macromolecule metabolic process regulation of biosynthetic process mRNA catabolic process regulation of biological process negative regulation of metabolic process biological regulation regulation of macromolecule metabolic process mRNA metabolic process regulation of gene expression negative regulation of gene expression negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process regulation of macromolecule biosynthetic process regulation of metabolic process positive regulation of molecular function regulation of molecular function regulation of ATP-dependent activity positive regulation of ATP-dependent activity rRNA 5'-end processing ribonucleoprotein complex biogenesis rRNA processing ribosome biogenesis RNA 5'-end processing rRNA metabolic process	cellular anatomical structure membrane bacterial degradosome exosome (RNase complex) protein-containing complex intracellular anatomical structure catalytic complex cytoplasm cytosol cytoplasmic exosome (RNase complex) exoribonuclease complex endoribonuclease complex intracellular protein-containing complex endonuclease complex cellular anatomical structure membrane bacterial degradosome exosome (RNase complex) protein-containing complex intracellular anatomical structure catalytic complex cytoplasm cytosol cytoplasmic exosome (RNase complex) exoribonuclease complex endoribonuclease complex intracellular protein-containing complex endonuclease complex cell periphery plasma membrane cytoplasmic side of plasma membrane cytoplasmic side of membrane side of membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR028878	Ribonuclease E	Family
A, B	IPR004659	Ribonuclease E/G	Family
A, B	IPR019307	RNA-binding protein AU-1/Ribonuclease E/G	Domain
A, B	IPR003029	S1 domain	Domain
A, B	IPR021968	Polyribonucleotide phosphorylase, C-terminal	Domain
A, B	IPR012340	Nucleic acid-binding, OB-fold	Homologous Superfamily
A, B	IPR048583	RNase E/G, thioredoxin-like domain	Domain