| 2012 |
Drosophila Zucchini (Zuc/PLD6) is an endoribonuclease that cleaves single-stranded RNA (but not double-stranded RNA) to generate 5'-monophosphorylated products, a hallmark of mature piRNAs. Crystal structure of DmZuc at 1.75 Å reveals a positively charged, narrow catalytic groove at the dimer interface accommodating single-stranded RNA. Conserved active-site residues are essential for ribonuclease activity in vitro and for piRNA maturation and transposon silencing in vivo. |
Crystal structure determination (1.75 Å), in vitro endoribonuclease assay, active-site mutagenesis, in vivo piRNA and transposon analysis |
Nature |
High |
23064230
|
| 2012 |
Mouse Zucchini homologue (mZuc/PLD6) forms a dimer in solution and possesses single-strand-specific nuclease activity. Crystal structure at 1.75 Å shows greater architectural similarity to PLD-family nucleases than to phospholipases, supporting a nuclease (rather than phospholipase) function in primary piRNA biogenesis. |
Crystal structure determination (1.75 Å), in vitro single-strand nuclease assay on soluble dimeric fragment |
Nature |
High |
23064227
|
| 2007 |
Drosophila Zucchini (Zuc) localizes to the perinuclear nuage and interacts physically with the PIWI-class protein Aubergine. Loss of Zuc prevents rasiRNA (piRNA precursor) production, causing upregulation of transposable elements and failure of germline RNAi, establishing Zuc as a nuclease-domain protein required for the piRNA pathway. |
Co-immunoprecipitation (Zuc–Aubergine interaction), immunofluorescence localization to nuage, genetic loss-of-function with small RNA and transposon phenotype readout |
Developmental cell |
High |
17543859
|
| 2011 |
MitoPLD (mouse PLD6) localizes to mitochondria and its knockout causes meiotic arrest, DNA damage, de-repression of retrotransposons, male sterility, and defective primary piRNA biogenesis, phenocopying piRNA pathway mutants. In mutant germ cells, mitochondria and nuage components are mislocalized around the centrosome, suggesting MITOPLD involvement in microtubule-dependent mitochondrial positioning. |
Knockout mouse generation, immunofluorescence/subcellular localization, small RNA sequencing, transposon expression analysis |
Developmental cell |
High |
21397847
|
| 2011 |
MitoPLD (PLD6) at the mitochondrial surface generates the signaling lipid phosphatidic acid (PA), which recruits the phosphatase Lipin 1 to convert PA to diacylglycerol, promoting mitochondrial fission and regulating intermitochondrial cement (nuage) structure. MitoPLD and Lipin 1 have opposing effects on mitochondrial length and nuage, linking mitochondrial PA signaling to piRNA biogenesis. |
Knockout mouse, biochemical lipid analysis (PA generation), co-localization/fractionation, overexpression/knockdown of MitoPLD and Lipin 1 with mitochondrial morphology readout |
Developmental cell |
High |
21397848
|
| 2017 |
In mouse growing oocytes, PLD6 depletion reduces piRNA levels by only ~50% (versus near-complete loss in males), indicating that PLD6-dependent 5'-end generation of primary piRNAs is partially compensated by other enzymes in female germ cells. MILI (PIWIL2) depletion eliminates almost all oocyte piRNAs, establishing MILI as the dominant piRNA biogenesis factor in oocytes. |
Knockout mice (Pld6, Mili, Miwi), small RNA sequencing and quantification in oocytes |
Nucleic acids research |
Medium |
28115634
|
| 2017 |
Zucchini-dependent piRNA processing in Drosophila requires the helicase Armitage (Armi) and correlates with localization of piRNA precursor transcripts to nuage; recruitment of piRNA pathway factors (but not Aub, Ago3, or the nuclear RDC complex) to a heterologous RNA is sufficient to route it into the Zuc-dependent processing pathway, indicating that nuage sequestration selects piRNA biogenesis substrates. |
Heterologous RNA recruitment assay, genetic epistasis (zuc, armi, aub, ago3, RDC mutants), RNA localization imaging in Drosophila germ cells |
Genes & development |
Medium |
29021243
|
| 2018 |
In Bombyx mori, loss of Zuc causes aberrant accumulation of piRNA intermediates within the mitochondrial Papi complex; recombinant Zuc processes these intermediates into mature piRNAs in vitro. Zuc acts specifically on the 3' end of piRNA intermediates (not the 5' end, which is formed by PIWI slicer activity), establishing a hierarchical biogenesis model distinct from Drosophila. |
Bombyx Zuc knockout, in vitro processing assay with recombinant Zuc, small RNA sequencing with 5'/3'-end analysis, Papi complex characterization |
Nature |
High |
29489748
|
| 2017 |
Glycerol kinase-like proteins GYKL1 and GK2 interact physically with PLD6 (MitoPLD) at the mitochondrial outer membrane and, in cooperation with PLD6, induce phosphatidic acid (PA)-dependent mitochondrial clustering. Loss of either Gykl1 or Gk2 in mice causes infertility with disordered mitochondrial sheath formation in spermatids, linking the PLD6-PA axis to spermiogenesis. |
Co-immunoprecipitation (Gykl1/Gk2 with Pld6), mitochondrial fractionation/localization, knockout mice, phosphatidic acid measurement, mitochondrial morphology analysis |
Cell discovery |
Medium |
28852571
|
| 2023 |
NME3, an outer mitochondrial membrane protein, is required for PLD6-induced mitochondrial tethering and clustering. NME3 binds directly to PA-exposed lipid packing defects via its N-terminal amphipathic helix; PA binding and hexamerization confer NME3 tethering activity. Nutrient starvation enhances NME3 enrichment at mitochondrial contact interfaces in a PLD6-dependent manner, promoting selective mitochondrial fusion for quality control. |
Co-IP/pulldown (NME3–PA interaction), lipid-binding assay, NME3 amphipathic helix mutagenesis, live-cell imaging, FRAP, NME3 KO cells |
The Journal of cell biology |
High |
37584589
|
| 2025 |
The CRL2-FEM1B E3 ligase complex physically interacts with PLD6 through the substrate receptor FEM1B, which is itself recruited to PLD6 via direct association with the mitochondrial import receptor TOM20. FEM1B controls proteasomal turnover of PLD6; ablation of FEM1B impairs PLD6 degradation, causes mitochondrial elongation/clustering defects that phenocopy PLD6 overexpression. |
Proteomic analysis, Co-IP (FEM1B–PLD6, FEM1B–TOM20), structural analysis, FEM1B KO with mitochondrial morphology readout |
Nature chemical biology |
High |
40263465
|
| 2023 |
PLD6 hydrolyzes cardiolipin to generate phosphatidic acid (PA) on the mitochondrial outer membrane, and this PA facilitates membrane fusion of LDLR+ endocytic vesicles with mitochondria. CISD2 on the outer mitochondrial membrane binds the cytosolic tail of LDLR, tethering LDLR+ vesicles to mitochondria, while PLD6-derived PA drives the actual membrane fusion event, delivering LDL-cholesterol to mitochondria for steroidogenesis bypassing lysosomes. |
Genome-wide shRNA screen, Co-IP (CISD2–LDLR), lipid biochemistry (PA measurement), live-cell imaging, PLD6 KO/knockdown with vesicle fusion and cholesterol trafficking readout |
Nature cell biology |
High |
37277481
|
| 2021 |
PLD6 loss-of-function in mice primarily silences retrotransposons at the posttranscriptional level (RNA degradation) rather than through DNA methylation. In Pld6 mutant prospermatogonia, most retrotransposons show increased RNA without major DNA methylation loss, whereas DNA methylation deficiency (Dnmt3l KO) has limited immediate transcriptional impact; long-term DNA hypomethylation caused by Pld6 mutation leads to increased retrotransposon expression in later meiotic stages. |
Pld6 KO and Dnmt3l KO mice, DNA methylation profiling, RNA-seq, nascent RNA quantification, cleaved RNA-end profiling, double KO epistasis |
PLoS genetics |
High |
28749988
|
| 2021 |
MOV10L1 interacts physically with PLD6; a single amino acid substitution V229E in the MOV10L1 N-terminal region (yama mutation) reduces this interaction, causing defects in pre-pachytene piRNA biogenesis and meiotic arrest, establishing the MOV10L1–PLD6 interaction as functionally required for piRNA 5'-end generation. |
Mov10l1 point-mutant mouse (V229E), Co-IP (MOV10L1–PLD6), small RNA sequencing, conditional KO epistasis |
PLoS genetics |
Medium |
33635934
|
| 2022 |
Zebrafish pld6 is a germline-specific regulator of mitochondrial fusion; pld6 knockout mutants exhibit impaired mitochondrial fusion in germline stem and progenitor cells, failure of GSPC differentiation, apoptosis of GSPCs, masculinization, and infertility, accompanied by defects in piRNA biogenesis and transposon de-repression. |
CRISPR/Cas9 pld6 knockout zebrafish, mitochondrial morphology imaging, small RNA sequencing, transposon expression analysis |
Advanced science |
Medium |
36257818
|
| 2022 |
Within the piRNA 3'-end formation pathway, the ZUC-processor complex defines a 'Goldilocks zone' interval on pre-piRNA intermediates where cleavage preferentially occurs in front of Uridine; this sequence preference, combined with PIWI-protein length preferences, ensures a single dominant piRNA 3'-end in both flies and mice. |
Deep sequencing of piRNA intermediates in Drosophila and mouse, biochemical analysis of cleavage site preferences |
iScience |
Medium |
35669519
|
| 2017 |
In Bombyx mori BmN4 cells, silkworm Zuc (BmZuc) localizes to mitochondria; molecular dissection shows the conserved mitochondrial localization sequence, RGV motif, PLDc2 domain, and HKD motif are each required for mitochondrial targeting. Knockdown of BmZuc does not affect nuage localization of other piRNA pathway components, but BmZuc itself depends on piRNA pathway components for proper localization. |
Subcellular fractionation, immunofluorescence, domain-deletion constructs, RNAi knockdown in BmN4 cells |
Biochemical and biophysical research communications |
Medium |
28942151
|
| 2021 |
Endogenous PLD6 in mouse testes localizes to the Golgi apparatus (partially overlapping with the cis-Golgi marker GM130) of pachytene spermatocytes and developing spermatids, specifically in flattened medial-Golgi cisternae, rather than to mitochondria as observed for ectopically overexpressed PLD6. PLD6 also interacts physically with tesmin, a testis-specific protein required for spermatogenesis. |
Validated anti-PLD6 antibodies, immunofluorescence, correlative light and electron microscopy, Co-immunoprecipitation (PLD6–tesmin), GM130 co-staining |
Cell and tissue research |
Medium |
33783608
|
| 2016 |
PLD6 mediates MYC-driven inhibition of YAP/TAZ in mammary epithelial cells by altering mitochondrial fusion/fission dynamics downstream of MYC, which strains cellular energy and activates AMPK; AMPK in turn inhibits YAP/TAZ co-activators. PLD6 is identified as the effector linking MYC-induced energy stress to mitochondrial dynamics and YAP/TAZ suppression. |
Genetic epistasis (PLD6 KD/OE), AMPK activity assay, YAP/TAZ reporter, mitochondrial morphology analysis, mouse mammary tumor models |
Cancer cell |
Medium |
26678338
|
| 2023 |
TurboID proximity labeling of Zuc (PLD6) in the Drosophila ovary defines the Zuc-proximal proteome, confirming enrichment at the outer mitochondrial membrane and identifying novel candidate interactors including chaperone-function proteins and endomembrane/vesicle transport proteins. Knockdown of several proximal candidates causes transposable element de-repression, validating their functional relevance to piRNA biogenesis. |
TurboID proximity labeling, quantitative mass spectrometry, RNAi knockdown with transposon de-repression readout |
Development (Cambridge, England) |
Medium |
36762624
|
| 2026 |
NME3 interacts with PLD6/MitoPLD to generate phosphatidic acid (PA) from cardiolipin on the outer mitochondrial membrane of damaged/depolarized mitochondria. This NME3-PLD6-derived PA is required to position MFN2 in proximity to PINK1 for ubiquitin phosphorylation on MFN2, enabling feedforward PRKN/parkin recruitment and mitophagy. Loss of NME3 impairs this PA signal, causing aberrant mitochondria-ER tethering that blocks MFN2 access to PINK1. |
Co-IP (NME3–PLD6), FRET/proximity ligation assay, PA generation assay, NME3 KO and KD with p-S65-ubiquitin and PRKN-binding readout, transmission electron microscopy |
Autophagy |
Medium |
41640016
|
| 2025 |
PLD6 depletion in colorectal cancer cells suppresses mitochondrial respiration (reduces mitochondrial length, membrane potential, calcium, and ROS), inhibits the TCA cycle and oxidative phosphorylation, lowers intracellular citrate and acetyl-CoA levels, and thereby reduces β-catenin acetylation by CBP/P300, destabilizing β-catenin and suppressing Wnt/β-catenin signaling. PLD6 thus acts as an oncogenic switch linking mitochondrial metabolism to Wnt pathway activation via acetyl-CoA. |
PLD6 KD/KO in CRC cells, mitochondrial respiration assays, metabolomics (TCA intermediates, acetyl-CoA), β-catenin acetylation assay, Co-IP, subcutaneous and orthotopic tumor models |
Experimental & molecular medicine |
Medium |
40259095
|
| 2024 |
TRABD forms complexes with MFN2, MIGA2, and PLD6 at the mitochondrial outer membrane to facilitate mitochondrial fusion; PLD6 is thus a component of a multi-protein fusion complex. |
Co-immunoprecipitation (TRABD with MFN2, MIGA2, PLD6), overexpression/loss-of-function with mitochondrial morphology readout |
Cell reports |
Low |
38843396
|
| 2017 |
PLD6 surface expression marks undifferentiated spermatogonia (SSCs) in mouse testes; PLD6 is primarily localized to the spermatogonial membrane, providing a cell-surface marker for SSC enrichment. |
Immunofluorescence, subcellular fractionation, magnetic-activated cell sorting, proteomics of SSCs |
Journal of cellular and molecular medicine |
Low |
25352495
|
| 2016 |
Human PLD6 (MitoPLD) can be produced and purified as a recombinant protein retaining in vitro endonuclease activity against RNA transcripts, confirming the nuclease function of the human orthologue. |
Recombinant protein production, purification, in vitro endonuclease activity assay |
Methods in enzymology |
Medium |
28063496
|