Annotations: 2XFM

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PAZ	e2xfmA1	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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	PIWI-LIKE PROTEIN 1	mRNA cap binding complex binding protein-containing complex binding binding RNA binding nucleic acid binding single-stranded RNA binding mRNA binding protein binding kinase binding enzyme binding protein kinase binding regulatory RNA binding piRNA binding endonuclease activity mRNA cap binding complex binding protein-containing complex binding binding RNA binding nucleic acid binding single-stranded RNA binding mRNA binding protein binding kinase binding enzyme binding protein kinase binding regulatory RNA binding piRNA binding 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 cation binding ion binding metal ion binding small molecule binding	developmental process spermatogenesis sexual reproduction reproductive process multicellular organismal reproductive process developmental process involved in reproduction male gamete generation gamete generation regulation of cellular process negative regulation of biological process regulation of primary metabolic process nucleobase-containing compound metabolic process positive regulation of metabolic process post-transcriptional regulation of gene expression developmental process spermatogenesis sexual reproduction reproductive process multicellular organismal reproductive process developmental process involved in reproduction male gamete generation gamete generation regulation of cellular process negative regulation of biological process regulation of primary metabolic process nucleobase-containing compound metabolic process positive regulation of metabolic process post-transcriptional regulation of gene expression 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 regulation of biological process positive regulation of nucleobase-containing compound metabolic process negative regulation of metabolic process positive regulation of mRNA metabolic process primary metabolic process nucleobase-containing compound catabolic process positive regulation of RNA metabolic process regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of macromolecule biosynthetic process post-transcriptional gene silencing nucleic acid catabolic process regulation of macromolecule biosynthetic process metabolic process macromolecule metabolic process regulation of metabolic process catabolic process positive regulation of biological process RNA metabolic process mRNA destabilization macromolecule catabolic process regulation of mRNA catabolic process negative regulation of cellular process positive regulation of cellular process negative regulation of macromolecule metabolic process regulation of biosynthetic process RNA destabilization biological regulation regulation of macromolecule metabolic process regulation of catabolic process gene expression macromolecule biosynthetic process mRNA metabolic process nucleic acid metabolic process regulatory ncRNA-mediated post-transcriptional gene silencing positive regulation of catabolic process regulation of mRNA stability regulatory ncRNA-mediated gene silencing negative regulation of biosynthetic process positive regulation of mRNA catabolic process regulation of RNA stability piRNA-mediated gene silencing by mRNA destabilization cellular process regulation of mRNA metabolic process cellular component organization chromatin organization chromatin remodeling cellular component organization or biogenesis retrotransposition heterochromatin formation epigenetic regulation of gene expression transposable element silencing by piRNA-mediated heterochromatin formation transposable element silencing by heterochromatin formation transposition constitutive heterochromatin formation regulatory ncRNA-mediated heterochromatin formation transposable element silencing piRNA-mediated heterochromatin formation negative regulation of gene expression, epigenetic protein metabolic process regulation of protein metabolic process translation regulation of translation cytoplasmic translation regulation of cytoplasmic translation spermatid development spermatid differentiation cellular developmental process cell development cellular process involved in reproduction in multicellular organism cell differentiation anatomical structure development germ cell development sperm DNA condensation nucleus organization organelle organization spermatid nucleus differentiation primary piRNA processing piRNA processing RNA biosynthetic process nucleic acid biosynthetic process RNA processing nucleobase-containing compound biosynthetic process regulatory ncRNA processing meiotic cell cycle cell cycle	intracellular anatomical structure P granule cytoplasmic ribonucleoprotein granule germ plasm intracellular membraneless organelle ribonucleoprotein granule intracellular organelle cellular anatomical structure organelle pole plasm membraneless organelle cytoplasm supramolecular complex cytosol intracellular anatomical structure P granule cytoplasmic ribonucleoprotein granule germ plasm intracellular membraneless organelle ribonucleoprotein granule intracellular organelle cellular anatomical structure organelle pole plasm membraneless organelle cytoplasm supramolecular complex cytosol dense body chromatoid body membrane-bounded organelle nucleus intracellular membrane-bounded organelle
B	5'-R(APCPCPGPAPCPUP(OMU)P)-3'	-	-	-

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	IPR012337	Ribonuclease H-like superfamily	Homologous Superfamily
A	IPR031320	GAGE	Domain
A	IPR003100	PAZ domain	Domain
A	IPR036085	PAZ domain superfamily	Homologous Superfamily
A	IPR003165	Piwi domain	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.