Molecular Target Synopsis
Domains and Structures
Drugs and Clinical Candidates
Ligand Efficiency Plot
Family Cladogram
Interaction Network
Gene Expression
Gene Copy Number Variation
Germline Genetics

Piwil1 (Q9JMB7) - Overview - Molecular Target Synopsis


Piwil1, Piwi-like protein 1
Enzyme Classification 3.1.26.-
UniProt Q9JMB7

Also Known as PIWL1_MOUSE, Piwil1, Miwi

Endoribonuclease that plays a central role in postnatal germ cells by repressing transposable elements and preventing their mobilization, which is essential for the germline integrity (PubMed:11578866, PubMed:22121019, PubMed:21237665). Acts via the piRNA metabolic process, which mediates the repression of transposable elements during meiosis by forming complexes composed of piRNAs and Piwi proteins and governs the methylation and subsequent repression of transposons (PubMed:11578866, PubMed:22121019, PubMed:21237665). Directly binds methylated piRNAs, a class of 24 to 30 nucleotide RNAs that are generated by a Dicer-independent mechanism and are primarily derived from transposons and other repeated sequence elements (PubMed:11578866, PubMed:22121019, PubMed:21237665). Strongly prefers a uridine in the first position of their guide (g1U preference, also named 1U-bias) (PubMed:24757166). Not involved in the piRNA amplification loop, also named ping-pong amplification cycle (PubMed:22121019). Acts as an endoribonuclease that cleaves transposon messenger RNAs (PubMed:22121019). Besides their function in transposable elements repression, piRNAs are probably involved in other processes during meiosis such as translation regulation (PubMed:16938833). Probable component of some RISC complex, which mediates RNA cleavage and translational silencing (PubMed:16938833). Also plays a role in the formation of chromatoid bodies and is required for some miRNAs stability (PubMed:16787948). Required to sequester RNF8 in the cytoplasm until late spermatogenesis; RNF8 being released upon ubiquitination and degradation of PIWIL1 (PubMed:28552346). Interacts (via Piwi domain) with DICER1, suggesting that it forms ribonucleoprotein RISC complexes; this interaction is regulated by HSP90AB1 activity (PubMed:16938833). Interacts with MAEL, KIF17, PABPC1, PRMT5 and WDR77 (PubMed:16787948, PubMed:16787967, PubMed:19020299, PubMed:19584108). Interacts (when methylated on arginine residues) with TDRD1, TDRKH/TDRD2, RNF17/TDRD4, TDRD6, TDRD7 and TDRD9 (PubMed:19584108, PubMed:19918066, PubMed:19926723, PubMed:23714778). Interacts with CLOCK (PubMed:22900038). Interacts with MOV10L1 (PubMed:20534472). Interacts with ANAPC10; interaction oly takes place following piRNA-binding (PubMed:23328397). Interacts with RNF8; leading to sequester RNF8 in the cytoplasm (PubMed:28552346). Interacts with Tex19.1 and, probably, Tex19.2 (PubMed:28254886).

Inspect Structure
See all 3D Structures for Piwil1

Isoforms / Transcripts (Protein Coding)

Protein Length Ensembl Gene Ensembl Transcript Ensembl Protein Uniprot Isoform

Sub-cellular localization

UniProt: Piwil1 is active in the following subcellular-locations: cytoplasm.
GO terms: Piwil1 is active in the following subcellular-locations: chromatoid body, cytoplasm, cytosol, dense body, nucleus, P granule.

GO terms

Gene Copy Number Variation

In COSMIC - Cell Lines Project Piwil1 has gain in 0 cell-lines, loss in 0 cell-lines and no signal in 0 cell-lines. (see details)

3D Structures

For Piwil1 there are:
2 structures (5 chains) solved
0 are solved in complex with at least one small molecule ligand

(see details)
Molecular Target 3D Synopsis