Annotations: 1R4K

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1r4ka_	All beta proteins	SH3-like barrel	PAZ domain	PAZ domain	Argonaute 1	fruit fly (Drosophila melanogaster ) [TaxId: 7227 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	PAZ domain	8027982	4000853	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	PAZ domain	8040361	3001750	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PAZ	e1r4kA1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: PAZ	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.170.260.10	Mainly Beta	Beta Complex	paz domain	paz domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF02170	PAZ domain (PAZ)	PAZ domain	This domain is named PAZ after the proteins Piwi Argonaut and Zwille. This domain is found in two families of proteins that are involved in post-transcriptional gene silencing. These are the Piwi family and the Dicer family, that includes the Carpel ...	This domain is named PAZ after the proteins Piwi Argonaut and Zwille. This domain is found in two families of proteins that are involved in post-transcriptional gene silencing. These are the Piwi family and the Dicer family, that includes the Carpel factory protein. The function of the domains is unknown but has been suggested to mediate complex formation between proteins of the Piwi and Dicer families by hetero-dimerisation. The three-dimensional structure of this domain has been solved [2-4]. The PAZ domain is composed of two subdomains. One subdomain is similar to the OB fold, albeit with a different topology. The OB-fold is well known as a single-stranded nucleic acid binding fold. The second subdomain is composed of a beta-hairpin followed by an alpha-helix. The PAZ domains shows low-affinity nucleic acid binding and appears to interact with the 3' ends of single-stranded regions of RNA in the cleft between the two subdomains. PAZ can bind the characteristic two-base 3' overhangs of siRNAs, indicating that although PAZ may not be a primary nucleic acid binding site in Dicer or RISC, it may contribute to the specific and productive incorporation of siRNAs and miRNAs into the RNAi pathway.	Domain
A	PF16488	Argonaute linker 2 domain (ArgoL2)	Argonaute linker 2 domain	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Argonaute 1	endoribonuclease activity, cleaving miRNA-paired mRNA endonuclease activity RNA endonuclease activity, producing 5'-phosphomonoesters catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid RNA nuclease activity hydrolase activity nuclease activity hydrolase activity, acting on ester bonds RNA endonuclease activity endonuclease activity, active with either ribo- or deoxyribonucleic acids and producing 5'-phosphomonoesters catalytic activity binding nucleic acid binding endoribonuclease activity, cleaving miRNA-paired mRNA endonuclease activity RNA endonuclease activity, producing 5'-phosphomonoesters catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid RNA nuclease activity hydrolase activity nuclease activity hydrolase activity, acting on ester bonds RNA endonuclease activity endonuclease activity, active with either ribo- or deoxyribonucleic acids and producing 5'-phosphomonoesters catalytic activity binding nucleic acid binding RNA binding single-stranded RNA binding regulatory RNA binding miRNA binding protein binding enzyme binding	multicellular organismal process regulation of biological process system process learning learning or memory response to stimulus nervous system process regulation of system process biological regulation cognition associative learning regulation of olfactory learning regulation of nervous system process regulation of behavior behavior multicellular organismal process regulation of biological process system process learning learning or memory response to stimulus nervous system process regulation of system process biological regulation cognition associative learning regulation of olfactory learning regulation of nervous system process regulation of behavior behavior regulation of response to stimulus olfactory behavior response to chemical chemosensory behavior regulation of multicellular organismal process olfactory learning regulation of cellular process negative regulation of biological process regulation of primary metabolic process post-transcriptional regulation of gene expression negative regulation of translation negative regulation of cellular process protein metabolic process negative regulation of protein metabolic process negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of protein metabolic process negative regulation of metabolic process primary metabolic process regulation of macromolecule metabolic process gene expression translation macromolecule biosynthetic process regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process regulation of translation negative regulation of macromolecule biosynthetic process regulation of macromolecule biosynthetic process metabolic process cellular process macromolecule metabolic process regulation of metabolic process developmental process blastoderm segmentation embryonic pattern specification segmentation pattern specification process embryo development regionalization multicellular organism development anatomical structure development segment polarity determination periodic partitioning regulatory ncRNA-mediated post-transcriptional gene silencing regulatory ncRNA-mediated gene silencing post-transcriptional gene silencing cell population proliferation sexual reproduction cellular developmental process reproductive process germarium-derived egg chamber formation oogenesis multicellular organismal reproductive process cell development cellular process involved in reproduction in multicellular organism developmental process involved in reproduction female gamete generation gamete generation anatomical structure morphogenesis cell differentiation germ-line cyst formation anatomical structure formation involved in morphogenesis germarium-derived female germ-line cyst formation germ cell development female germ-line cyst formation female germ-line stem cell population maintenance germ-line stem cell population maintenance maintenance of cell number stem cell population maintenance nonassociative learning habituation miRNA-mediated gene silencing by mRNA destabilization nucleobase-containing compound 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 RNA metabolic process mRNA destabilization macromolecule catabolic process regulation of mRNA catabolic process positive regulation of cellular process RNA destabilization regulation of catabolic process mRNA metabolic process nucleic acid metabolic 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 ribonucleoprotein complex biogenesis RISC complex assembly protein-RNA complex assembly cellular component organization cellular component biogenesis protein-RNA complex organization cellular component assembly protein-containing complex assembly cellular component organization or biogenesis protein-containing complex organization chromatin organization chromatin remodeling heterochromatin formation epigenetic regulation of gene expression negative regulation of gene expression, epigenetic cell fate determination germarium-derived oocyte fate determination oocyte fate determination germarium-derived oocyte differentiation oocyte differentiation cell fate commitment RNA biosynthetic process nucleic acid biosynthetic process RNA processing nucleobase-containing compound biosynthetic process regulatory ncRNA processing miRNA processing	protein-containing complex ribonucleoprotein complex RNAi effector complex RISC complex cellular anatomical structure intracellular anatomical structure cytoplasm intracellular organelle organelle membraneless organelle cytoplasmic ribonucleoprotein granule intracellular membraneless organelle supramolecular complex ribonucleoprotein granule protein-containing complex ribonucleoprotein complex RNAi effector complex RISC complex cellular anatomical structure intracellular anatomical structure cytoplasm intracellular organelle organelle membraneless organelle cytoplasmic ribonucleoprotein granule intracellular membraneless organelle supramolecular complex ribonucleoprotein granule RISC-loading complex endoribonuclease complex catalytic complex intracellular protein-containing complex endonuclease complex perinuclear region of cytoplasm P-body membrane-bounded organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR036397	Ribonuclease H superfamily	Homologous Superfamily
A	IPR014811	Argonaute, linker 1 domain	Domain
A	IPR032472	Argonaute linker 2 domain	Domain
A	IPR012337	Ribonuclease H-like superfamily	Homologous Superfamily
A	IPR045246	Argonaute-like, PIWI domain	Domain
A	IPR003100	PAZ domain	Domain
A	IPR032473	Protein argonaute, Mid domain	Domain
A	IPR036085	PAZ domain superfamily	Homologous Superfamily
A	IPR003165	Piwi domain	Domain
A	IPR032474	Protein argonaute, N-terminal	Domain

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.