Annotations: 3HTX

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	La_like	e3htxA2	A: alpha arrays	X: HTH	H: HTH	T: winged	F: La_like	ECOD (1.6)
A	FKBP_C	e3htxA5	A: a+b two layers	X: FKBP-like	H: FKBP-like	T: FKBP-like	F: FKBP_C	ECOD (1.6)
A	KOG1045_2nd	e3htxA4	A: a+b two layers	X: dsRBD-like	H: dsRNA-binding domain-like (From Topology)	T: dsRNA-binding domain-like	F: KOG1045_2nd	ECOD (1.6)
A	UNK_F_TYPE	e3htxA1	A: a+b two layers	X: dsRBD-like	H: dsRNA-binding domain-like (From Topology)	T: dsRNA-binding domain-like	F: UNK_F_TYPE	ECOD (1.6)
A	KOG1045_1st	e3htxA3	A: a+b two layers	X: Domain in small RNA methyltransferase HEN1 (From Topology)	H: Domain in small RNA methyltransferase HEN1 (From Topology)	T: Domain in small RNA methyltransferase HEN1	F: KOG1045_1st	ECOD (1.6)
A	Methyltransf_11_6	e3htxA6	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: S-adenosyl-L-methionine-dependent methyltransferases	F: Methyltransf_11_6	ECOD (1.6)
D	La_like	e3htxD4	A: alpha arrays	X: HTH	H: HTH	T: winged	F: La_like	ECOD (1.6)
D	FKBP_C	e3htxD7	A: a+b two layers	X: FKBP-like	H: FKBP-like	T: FKBP-like	F: FKBP_C	ECOD (1.6)
D	KOG1045_2nd	e3htxD2	A: a+b two layers	X: dsRBD-like	H: dsRNA-binding domain-like (From Topology)	T: dsRNA-binding domain-like	F: KOG1045_2nd	ECOD (1.6)
D	UNK_F_TYPE	e3htxD6	A: a+b two layers	X: dsRBD-like	H: dsRNA-binding domain-like (From Topology)	T: dsRNA-binding domain-like	F: UNK_F_TYPE	ECOD (1.6)
D	KOG1045_1st	e3htxD3	A: a+b two layers	X: Domain in small RNA methyltransferase HEN1 (From Topology)	H: Domain in small RNA methyltransferase HEN1 (From Topology)	T: Domain in small RNA methyltransferase HEN1	F: KOG1045_1st	ECOD (1.6)
D	Methyltransf_11_6	e3htxD5	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: S-adenosyl-L-methionine-dependent methyltransferases	F: Methyltransf_11_6	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.160.20	Alpha Beta	2-Layer Sandwich	Double Stranded RNA Binding Domain		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)
D	3.30.160.20	Alpha Beta	2-Layer Sandwich	Double Stranded RNA Binding Domain		CATH (4.3.0)
D	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, D	PF21224	Small RNA 2'-O-methyltransferase-like, La-motif-containing domain (Hen1_LCD)	Small RNA 2'-O-methyltransferase-like, La-motif-containing domain	This domain is found in Small RNA 2'-O-methyltransferase from Arabidopsis thaliana (Hen1) and similar proteins from plants. Hen1 is a methyltransferase for miRNAs and all types of siRNAs, which protects these molecules from 3'-end uridylation and 3'- ...	This domain is found in Small RNA 2'-O-methyltransferase from Arabidopsis thaliana (Hen1) and similar proteins from plants. Hen1 is a methyltransferase for miRNAs and all types of siRNAs, which protects these molecules from 3'-end uridylation and 3'-to-5' exonuclease-mediated degradation. This protein shows five structural domains, four of which directly interact with the RNA substrate. This entry represents one of these four domains: the La-motif-containing domain (LCD) [1].	Domain
A, D	PF13847	Methyltransferase domain (Methyltransf_31)	Methyltransferase domain	This family appears to have methyltransferase activity.	Domain
A, D	PF18441	Hen1 La-motif C-terminal domain (Hen1_Lam_C)	Hen1 La-motif C-terminal domain	RNA silencing is a conserved regulatory mechanism in fungi, plants and animals that regulates gene expression and defence against viruses and transgenes. A conserved S-adenosyl-l-methionine-dependent RNA methyltransferase, HUA ENHANCER 1 (HEN1), and ...	RNA silencing is a conserved regulatory mechanism in fungi, plants and animals that regulates gene expression and defence against viruses and transgenes. A conserved S-adenosyl-l-methionine-dependent RNA methyltransferase, HUA ENHANCER 1 (HEN1), and its homologues are responsible for 2'-O-methylation on the 3' terminal nucleotide of microRNAs and small interfering RNAs (siRNAs). The 2'-O-methylation protects miRNAs and siRNAs from 3'-end uridylation and 3'-to-5' exonuclease-mediated degradation. This domain lies on the C-terminal region of the La-motif domain found in HEN1 [1].	Domain
A, D	PF17842	Double-stranded RNA binding domain 2 (dsRBD2)	Double-stranded RNA binding domain 2	This domain is found in HEN1 proteins from Arabidopsis. Structural characterization reveal that small RNA substrate bind to two double-stranded RNA (dsRNA)-specific binding domains, dsRBD1 and dsRBD2. This entry relates to dsRBD2 which together with ...	This domain is found in HEN1 proteins from Arabidopsis. Structural characterization reveal that small RNA substrate bind to two double-stranded RNA (dsRNA)-specific binding domains, dsRBD1 and dsRBD2. This entry relates to dsRBD2 which together with dsRBD1 forms a strong grip on the duplex region of the small RNA substrate, and these interactions help position the other duplex terminus towards the MTase domain Pfam:PF13847 [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, D	HEN1	isomerase activity catalytic activity, acting on a protein peptidyl-prolyl cis-trans isomerase activity catalytic activity cis-trans isomerase activity RNA methyltransferase activity O-methyltransferase activity catalytic activity, acting on RNA small RNA 2'-O-methyltransferase activity transferase activity, transferring one-carbon groups catalytic activity, acting on a nucleic acid transferase activity methyltransferase activity RNA 2'-O-methyltransferase activity isomerase activity catalytic activity, acting on a protein peptidyl-prolyl cis-trans isomerase activity catalytic activity cis-trans isomerase activity RNA methyltransferase activity O-methyltransferase activity catalytic activity, acting on RNA small RNA 2'-O-methyltransferase activity transferase activity, transferring one-carbon groups catalytic activity, acting on a nucleic acid transferase activity methyltransferase activity RNA 2'-O-methyltransferase activity RNA binding binding organic cyclic compound binding nucleic acid binding cation binding ion binding metal ion binding small molecule binding	regulation of cellular process response to stimulus negative regulation of biological process negative regulation of cellular metabolic process response to biotic stimulus post-transcriptional regulation of gene expression organic substance biosynthetic process response to virus RNAi-mediated antiviral immune response regulation of biological process immune response response to other organism cellular metabolic process negative regulation of metabolic process regulation of cellular process response to stimulus negative regulation of biological process negative regulation of cellular metabolic process response to biotic stimulus post-transcriptional regulation of gene expression organic substance biosynthetic process response to virus RNAi-mediated antiviral immune response regulation of biological process immune response response to other organism cellular metabolic process negative regulation of metabolic process regulation of cellular metabolic process response to external stimulus negative regulation of cellular biosynthetic process regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of macromolecule biosynthetic process defense response to other organism post-transcriptional gene silencing regulation of macromolecule biosynthetic process metabolic process macromolecule metabolic process regulation of metabolic process biological process involved in interspecies interaction between organisms cellular biosynthetic process organic substance metabolic process response to stress negative regulation of cellular process innate immune response response to external biotic stimulus negative regulation of macromolecule metabolic process regulation of biosynthetic process defense response biological regulation defense response to symbiont regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulatory ncRNA-mediated post-transcriptional gene silencing regulatory ncRNA-mediated gene silencing regulation of cellular biosynthetic process defense response to virus negative regulation of biosynthetic process immune system process cellular process multicellular organismal process reproductive process pattern specification process developmental process involved in reproduction floral organ formation multicellular organism development reproductive shoot system development anatomical structure development reproductive structure development post-embryonic development system development developmental process plant organ development reproductive system development flower development post-embryonic plant organ morphogenesis regionalization specification of floral organ identity post-embryonic plant morphogenesis plant organ morphogenesis anatomical structure morphogenesis anatomical structure formation involved in morphogenesis post-embryonic plant organ development shoot system development plant organ formation specification of plant organ identity floral organ morphogenesis floral organ development xylem and phloem pattern formation leaf vascular tissue pattern formation RNA metabolic process primary metabolic process nucleic acid metabolic process macromolecule methylation nucleobase-containing compound metabolic process organic cyclic compound metabolic process RNA modification methylation macromolecule modification RNA methylation miRNA-mediated gene silencing by mRNA destabilization regulation of primary metabolic process positive regulation of metabolic process regulation of RNA metabolic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process regulation of biological quality RNA catabolic process mRNA catabolic process positive regulation of nucleobase-containing compound metabolic process positive regulation of mRNA metabolic process nucleobase-containing compound catabolic process positive regulation of RNA metabolic process miRNA-mediated post-transcriptional gene silencing nucleic acid catabolic process catabolic process positive regulation of biological process mRNA destabilization macromolecule catabolic process regulation of mRNA catabolic process RNA destabilization regulation of catabolic process mRNA metabolic process organic cyclic compound catabolic process positive regulation of catabolic process regulation of mRNA stability positive regulation of mRNA catabolic process regulation of RNA stability regulation of mRNA metabolic process organic substance catabolic process regulation of multicellular organismal development regulation of developmental process regulation of reproductive process regulation of shoot system development regulation of post-embryonic development regulation of multicellular organismal process regulation of flower development leaf proximal/distal pattern formation proximal/distal pattern formation RNA processing regulatory ncRNA processing miRNA processing	intracellular anatomical structure cytoplasm cellular anatomical entity membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle
B, E	5'-R(GPAPUPUPUPCPUPCPUPCPUPGPCPAPAPGPCPGPAPAPAPG)-3'	-	-	-
C, F	5'-R(PUPUPCPGPCPUPUPGPCPAPGPAPGPAPGPAPAPAPUPCPAPC)-3'	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, D	IPR046357	Peptidyl-prolyl cis-trans isomerase domain superfamily	Homologous Superfamily
A, D	IPR029063	S-adenosyl-L-methionine-dependent methyltransferase superfamily	Homologous Superfamily
A, D	IPR026610	3'-RNA ribose 2'-O-methyltransferase, Hen1	Family
A, D	IPR040813	Small RNA 2'-O-methyltransferase Hen1, La-motif C-terminal domain	Domain
A, D	IPR025714	Methyltransferase domain	Domain
A, D	IPR040870	HEN1, double-stranded RNA binding domain 2	Domain
A, D	IPR006630	La-type HTH domain	Domain

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.