Annotations: 4FZV

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Methyltr_RsmB-F_1	e4fzvA1	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: S-adenosyl-L-methionine-dependent methyltransferases	F: Methyltr_RsmB-F_1	ECOD (1.6)
B	mTERF	e4fzvB1	A: alpha superhelices	X: Mitochondrial mTERF-like	H: Mitochondrial mTERF (From Topology)	T: Mitochondrial mTERF	F: mTERF	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	6.20.240.40	Special	Other non-globular	Alpha-Beta Plaits		CATH (4.3.0)
A	3.40.50.150	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Vaccinia Virus protein VP39	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF01189	16S rRNA methyltransferase RsmB/F (Methyltr_RsmB-F)	16S rRNA methyltransferase RsmB/F	-	Family
B	PF02536	mTERF (mTERF)	mTERF	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Putative methyltransferase NSUN4	RNA methyltransferase activity rRNA methyltransferase activity catalytic activity, acting on RNA transferase activity, transferring one-carbon groups catalytic activity, acting on a nucleic acid transferase activity catalytic activity, acting on a rRNA S-adenosylmethionine-dependent methyltransferase activity C-methyltransferase activity methyltransferase activity catalytic activity rRNA (cytosine) methyltransferase activity rRNA (cytosine-C5-)-methyltransferase activity tRNA methyltransferase activity RNA methyltransferase activity rRNA methyltransferase activity catalytic activity, acting on RNA transferase activity, transferring one-carbon groups catalytic activity, acting on a nucleic acid transferase activity catalytic activity, acting on a rRNA S-adenosylmethionine-dependent methyltransferase activity C-methyltransferase activity methyltransferase activity catalytic activity rRNA (cytosine) methyltransferase activity rRNA (cytosine-C5-)-methyltransferase activity tRNA methyltransferase activity tRNA (cytidine) methyltransferase activity catalytic activity, acting on a tRNA tRNA (cytidine-5-)-methyltransferase activity RNA binding binding organic cyclic compound binding rRNA binding nucleic acid binding	ribonucleoprotein complex biogenesis cellular biosynthetic process rRNA methylation RNA metabolic process rRNA processing rRNA modification nucleobase-containing compound metabolic process cellular component biogenesis ribosome biogenesis organic substance metabolic process organic substance biosynthetic process cellular component organization or biogenesis RNA processing rRNA metabolic process ribonucleoprotein complex biogenesis cellular biosynthetic process rRNA methylation RNA metabolic process rRNA processing rRNA modification nucleobase-containing compound metabolic process cellular component biogenesis ribosome biogenesis organic substance metabolic process organic substance biosynthetic process cellular component organization or biogenesis RNA processing rRNA metabolic process cellular metabolic process primary metabolic process gene expression macromolecule biosynthetic process nucleic acid metabolic process macromolecule methylation organic cyclic compound metabolic process RNA modification biosynthetic process methylation macromolecule modification ncRNA metabolic process nucleic acid catabolic process metabolic process cellular process macromolecule metabolic process RNA methylation	membrane-bounded organelle protein-containing complex intracellular anatomical structure mitochondrial large ribosomal subunit mitochondrion membrane-enclosed lumen mitochondrial matrix intracellular organelle lumen intracellular organelle ribosomal subunit organellar ribosome ribosome large ribosomal subunit organellar large ribosomal subunit membrane-bounded organelle protein-containing complex intracellular anatomical structure mitochondrial large ribosomal subunit mitochondrion membrane-enclosed lumen mitochondrial matrix intracellular organelle lumen intracellular organelle ribosomal subunit organellar ribosome ribosome large ribosomal subunit organellar large ribosomal subunit non-membrane-bounded organelle mitochondrial protein-containing complex mitochondrial ribosome cellular anatomical entity intracellular membrane-bounded organelle organelle lumen organelle ribonucleoprotein complex intracellular non-membrane-bounded organelle cytoplasm
B	mTERF domain-containing protein 2	DNA binding double-stranded DNA binding binding organic cyclic compound binding nucleic acid binding RNA binding rRNA binding	developmental process heart development multicellular organism development multicellular organismal process anatomical structure development animal organ development circulatory system development system development protein localization establishment of protein localization cellular localization protein targeting establishment of localization localization developmental process heart development multicellular organism development multicellular organismal process anatomical structure development animal organ development circulatory system development system development protein localization establishment of protein localization cellular localization protein targeting establishment of localization localization establishment of protein localization to organelle cellular macromolecule localization macromolecule localization protein localization to organelle protein localization to mitochondrion protein targeting to mitochondrion cellular process establishment of protein localization to mitochondrion regulation of cellular process cellular biosynthetic process RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process organic substance metabolic process organic substance biosynthetic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of biological process cellular metabolic process biological regulation primary metabolic process regulation of cellular metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of cellular biosynthetic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process organic cyclic compound biosynthetic process metabolic process regulation of macromolecule biosynthetic process regulation of DNA-templated transcription macromolecule metabolic process regulation of metabolic process sensory organ development eye development visual system development camera-type eye development sensory system development ribonucleoprotein complex biogenesis rRNA processing cellular component biogenesis ribosome biogenesis cellular component organization or biogenesis RNA processing rRNA metabolic process ncRNA metabolic process nucleic acid catabolic process organelle assembly non-membrane-bounded organelle assembly cellular component organization organelle organization cellular component assembly mitochondrial ribosome assembly ribosome assembly mitochondrial gene expression mitochondrial transcription mitochondrial RNA metabolic process	membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle protein-containing complex mitochondrial large ribosomal subunit membrane-enclosed lumen mitochondrial matrix intracellular organelle lumen ribosomal subunit membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle protein-containing complex mitochondrial large ribosomal subunit membrane-enclosed lumen mitochondrial matrix intracellular organelle lumen ribosomal subunit organellar ribosome ribosome large ribosomal subunit organellar large ribosomal subunit non-membrane-bounded organelle mitochondrial protein-containing complex mitochondrial ribosome organelle lumen ribonucleoprotein complex intracellular non-membrane-bounded organelle cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR001678	SAM-dependent methyltransferase RsmB-F/NOP2-type domain	Domain
A	IPR029063	S-adenosyl-L-methionine-dependent methyltransferase superfamily	Homologous Superfamily
A	IPR049560	SAM-dependent methyltransferase RsmB-F/NOP2-type, catalytic core	Domain
A	IPR023267	RNA (C5-cytosine) methyltransferase	Family
B	IPR038538	MTERF superfamily, mitochondrial/chloroplastic	Homologous Superfamily
B	IPR003690	Transcription termination factor, mitochondrial/chloroplastic	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: Q96CB9	osteosarcoma
B	Pharos: Q7Z6M4	osteosarcoma

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.