| 2017 |
FAM46C/TENT5C encodes an active non-canonical poly(A) polymerase; catalytically-inactive mutant fails to enhance mRNA stability or induce cell death, establishing that enzymatic activity is required for its tumor-suppressive function in multiple myeloma. |
In vitro poly(A) polymerase assay, catalytic mutant re-introduction into MM cell lines, mRNA stability assays, Nanopore direct RNA-sequencing of poly(A) tails |
Nature communications |
High |
28931820
|
| 2020 |
TENT5C polyadenylates immunoglobulin mRNAs in activated B cells, regulating their half-life and steady-state levels; catalytic activity knock-in mice display the same impaired antibody production phenotype as Tent5c-/- mice, confirming enzymatic activity is required. |
Nanopore direct RNA-sequencing for poly(A) tail length distribution, catalytic mutation knock-in mice, Tent5c-/- mouse model with immune response measurements, poly(A) tail-length assays on Ig mRNAs |
Nature communications |
High |
32341344
|
| 2020 |
FAM46C selectively stabilizes mRNAs encoding ER-targeted proteins (ER protein import, folding, N-glycosylation, trafficking) and requires interaction with ER membrane resident proteins FNDC3A and FNDC3B for this activity; FAM46C activity is regulated by proteasomal degradation or inhibitory interaction with the ZZ domain of autophagic receptor p62, which sequesters it in p62+ aggregates and prevents its association with FNDC3 proteins. |
Co-immunoprecipitation, biochemical fractionation, mRNA stability assays, proteasome inhibition experiments, p62 ZZ-domain binding assay, MS-based proteomics |
Cell reports |
High |
32966780
|
| 2020 |
FAM46C forms a complex with ER-associated protein FNDC3A; this complex requires FNDC3A for FAM46C to reside on the cytoplasmic side of the ER. The FAM46C/FNDC3A complex modulates secretion routes and impairs autophagy, leading to accumulation of intracellular protein aggregates and apoptosis in MM cells. |
Biochemical analysis/Co-IP, reconstitution of FAM46C in MM cells that lost it, FNDC3A depletion and expression rescue experiments, autophagy assays |
Cancer research |
High |
32963011
|
| 2021 |
Crystal structure of mammalian FAM46C at 2.35 Å reveals it is a prokaryotic-like poly(A) polymerase that preferentially uses ATP and extends A-rich RNA substrates; residues at positions 77, 290, and 298 are key determinants of enzymatic activity divergence from homolog FAM46B; MM-associated mutations at the catalytic site (D90G, D90H) or putative RNA-binding site (I155L, S156F, D182Y, F184L, Y247V, M270V) abolish or compromise PAP activity and anti-apoptotic suppression. |
X-ray crystallography (2.35 Å), site-directed mutagenesis, in vitro poly(A) polymerase biochemical assays, cell-based apoptosis assay with mutant variants |
Cancer communications |
High |
34048638
|
| 2020 |
FAM46C physically interacts with the serine/threonine kinase Plk4; crystal structure of FAM46C in complex with the Cryptic Polo-Box 1-2 (CPB1-2) domains of Plk4 was determined; this interaction recruits FAM46C to centrosomes; FAM46C inhibits Plk4 kinase activity and suppresses Plk4-induced centriole duplication independently of FAM46C's nucleotidyl transferase activity. |
Crystal structure of FAM46C-Plk4 CPB1-2 complex, structure-based mutational analyses, Co-IP, kinase activity assay, centriole duplication assay, xenograft model |
Structure |
High |
32433990
|
| 2020 |
FAM46C/TENT5C localizes to centrioles and inhibits Plk4 kinase activity, suppressing centriole overduplication and cancer cell invasion; this function is independent of its nucleotidyltransferase activity; FAM46C loss is detected in patient-derived colorectal cancer tissue correlating with advanced clinical stage. |
Co-IP (physical interaction with Plk4), immunofluorescence localization to centrioles, Plk4 kinase inhibition assay, centriole counting, invasion assay, xenograft model |
Communications biology |
High |
32807875
|
| 2019 |
FAM46C localizes specifically to the manchette (a transient microtubule-based structure) of spermatids in mouse testes; FAM46C knockout causes male sterility with headless spermatozoa; FAM46C does not exhibit protein kinase or AMPylation activity against general substrates in vitro. |
Immunofluorescence localization, gene knockout mouse model, intracytoplasmic sperm injection assay, RNA-seq of KO testes, in vitro kinase and AMPylation activity assays (negative for both) |
Biology of reproduction |
High |
31087039
|
| 2026 |
TENT5C poly(A) polymerase activity is required to extend poly(A) tails of Odf1 mRNA in late spermatids; absence of TENT5C catalytic activity causes shorter Odf1 poly(A) tails, failure of ODF1 protein accumulation at the spermatid neck, and production of headless spermatozoa with flagellar abnormalities, establishing Odf1 as a direct in vivo substrate critical for sperm morphogenesis. |
Catalytically-inactive TENT5C knock-in mice, transcriptome-wide poly(A) tail profiling, immunofluorescence for ODF1 localization, sperm morphology analysis |
Nature communications |
High |
42009655
|
| 2020 |
FAM46C polyadenylates immunoglobulin heavy and light chain mRNAs as direct substrates in plasma cells; FAM46C inactivation (CRISPR-Cas9) causes poly(A) tail shortening of Ig mRNAs, reducing their abundance and protein output; loss of FAM46C also upregulates MALAT1 lncRNA and activates PI3K/Rac1 signaling to increase myeloma cell migration. |
CRISPR-Cas9 FAM46C inactivation, poly(A) tail-length determination assays on Ig mRNAs, gene expression analysis, migration assay with PI3K/Rac1 pathway inhibitors |
Journal of cellular and molecular medicine |
Medium |
32141701
|
| 2017 |
Wild-type FAM46C overexpression in MM cells downregulates IRF4, CEBPB, and MYC while upregulating immunoglobulin light chain and HSPA5/BIP; CRISPR-mediated depletion of endogenous FAM46C activates ERK and antiapoptotic signaling and confers resistance to dexamethasone and lenalidomide; myeloma mutations in FAM46C abrogate its cytotoxicity. |
FAM46C overexpression with patient-derived mutants, CRISPR KO in MM cell lines, gene expression analysis, drug sensitivity assays |
Cancer research |
Medium |
28619709
|
| 2020 |
Loss of FAM46C in MM cells triggers activation of PI3K-Akt signaling, decreasing PTEN activity and increasing phosphorylation of Akt and its substrates both in vitro and in vivo; a selective PI3K inhibitor (PF-04691502) or Akt inhibitor (afuresertib) suppresses the augmented Akt phosphorylation in FAM46C-/- cells. |
CRISPR-generated FAM46C-/- MM cell clones, xenograft mouse model, western blotting for p-Akt and substrates, PTEN activity assay, PI3K/Akt inhibitor treatment, gene set enrichment analysis |
Cancer science |
Medium |
32176823
|
| 2023 |
FAM46C is an interferon-stimulated gene; wild-type FAM46C expression in HEK-293T cells inhibits production of HIV-1-derived and HIV-1 lentiviruses through deregulation of autophagy (a pathway required for efficient lentiviral particle production), not through transcriptional or translational inhibition; frequent MM-associated mutant variants of FAM46C do not inhibit lentiviral production. |
Interferon stimulation assays, lentiviral production assays with WT vs. mutant FAM46C overexpression, autophagy perturbation experiments, translation inhibition controls |
Microbiology spectrum |
Medium |
37358411
|
| 2025 |
TENT5C acts as a corepressor of both glucocorticoid receptor (GR) and estrogen receptor α (ERα); the third LXXLL motif of TENT5C directly interacts with ERα (supported by molecular dynamics simulations and Co-IP); mutation of the third LXXLL motif disrupts repression of ERα but not GR; TENT5C poly(A) polymerase activity is not required for repression of ERα. |
Co-immunoprecipitation (TENT5C with ERα), reporter assays (GR and ERα transcriptional activity), LXXLL motif mutagenesis, molecular dynamics simulations, catalytic mutant controls |
The FEBS journal |
Medium |
40421654
|
| 2024 |
FAM46C is required for proper erythropoiesis; it stabilizes mRNA in a polymerase activity-dependent manner during red blood cell development; direct in vivo targets include transcripts encoding lysosome and mitochondria components, consistent with the need for organelle clearance during erythroid maturation; FAM46C upregulation in late erythroid stages is controlled by an erythroid-specific enhancer. |
FAM46C KO in erythroid cells, mRNA stability assays, erythroid differentiation assays, enhancer characterization, transcriptome analysis |
Journal of genetics and genomics |
Medium |
38403115
|
| 2024 |
TENT5C cooperates with LARP4/5 RNA-binding proteins to maintain globin mRNA poly(A) tails and hemoglobin production during terminal erythropoiesis; TENT5C catalytic mutant knock-in mice display microcytic hypochromic anemia; proteomics revealed a transient but specific association of TENT5C with LARP4/5; LARP4/5 depletion causes poly(A) tail shortening and downregulation of globin mRNAs; TENT5C is destabilized by CCR4-NOT-associated E3 ubiquitin ligase CNOT4. |
Catalytic mutant knock-in mice, poly(A) tail profiling, proteomic Co-IP (TENT5C-LARP4/5), LARP4/5 depletion, CNOT4-mediated ubiquitination/degradation assay |
bioRxiv (preprint)preprint |
Medium |
|
| 2020 |
FAM46C overexpression in HCC cells suppresses cell migration and invasion by suppressing TGF-β/Smad signaling and inhibiting epithelial-mesenchymal transition (EMT); antimetastatic effects of NCTD on HCC cells are partially rescued by FAM46C knockdown. |
FAM46C overexpression and knockdown in HCC cell lines, migration/invasion assays, western blotting for TGF-β/Smad pathway components and EMT markers |
American journal of translational research |
Low |
28123642
|
| 2020 |
FAM46C promotes PTEN expression in prostate cancer cells by inhibiting PTEN ubiquitination, thereby suppressing AKT activation; FAM46C KD activates AKT and promotes cell proliferation. |
FAM46C knockdown and overexpression in prostate cancer cell lines, PTEN ubiquitination assay, AKT phosphorylation western blot, in vivo tumor growth assay |
Aging |
Low |
32283544
|
| 2024 |
TENT5C expression is regulated by DNMT3A-mediated gene body methylation; DNMT3A knockdown increases enrichment of DNMT3B and DNMT1 at the FAM46C gene body, elevating FAM46C transcription; elevated FAM46C suppresses trophoblast cell migration and invasion. |
Bisulfite sequencing of FAM46C gene body, DNMT3A siRNA knockdown, ChIP or methylation enrichment analysis, RNA-seq, migration/invasion rescue experiments |
Cellular signalling |
Low |
39532219
|
| 2024 |
TENT5C downregulation mediates the anti-inflammatory effects of mild hypothermia in LPS-stimulated microglia; TENT5C knockdown attenuates expression of pro-inflammatory genes (TNF-α, IL-1β, Agrn, Fpr2), NLRP3 and p-P65 levels, and ASC-speck formation; TENT5C overexpression potentiates these inflammatory indicators. |
siRNA knockdown of Tent5c in BV-2 microglial cells, LPS stimulation, RT-PCR, western blot for NLRP3 and p-P65, immunofluorescence for p-P65 and ASC-speck |
Biochemical and biophysical research communications |
Low |
38484570
|