| 2008 |
LUMA (TMEM43) is an integral inner nuclear membrane (INM) protein with four transmembrane domains and a large hydrophilic domain located between membrane spans 1 and 2 exposed to the perinuclear space, with both termini residing cyto- or nucleoplasmically. Nuclear envelope targeting mainly depends on the membrane spans. Transmembrane domains also promote homooligomerization. LUMA binds A- and B-type lamins and depends on A-type lamins for its INM localization. LUMA interacts with emerin, and both downregulation of LUMA and overexpression of dominant-negative LUMA fragments causes redistribution of emerin. |
Protease protection assay, antibody epitope accessibility assay, co-immunoprecipitation, dominant-negative overexpression, immunofluorescence |
Journal of cell science |
High |
18230648
|
| 2011 |
TMEM43 (LUMA) interacts with SUN2 (in addition to emerin) at the nuclear membrane. The p.Glu85Lys mutation in TMEM43 causes failure of oligomerization, reduced nuclear staining of LUMA, and redistribution/aggregation of emerin and SUN2, along with a higher proportion of abnormally shaped nuclei. In vivo electroporation of mutant LUMA in mouse tibialis anterior muscles similarly showed decreased staining of emerin and SUN2 on myonuclei. |
In vitro transfection, co-immunoprecipitation, immunofluorescence, in vivo electroporation in mouse muscle |
Annals of neurology |
High |
21391237
|
| 2014 |
Skin fibroblasts from carriers of the TMEM43 p.S358L mutation exhibit increased nuclear stiffness compared to wild-type controls, as measured by atomic force microscopy, suggesting that the mutation affects nuclear mechanical properties. |
Atomic force microscopy on patient-derived skin fibroblasts |
European heart journal |
Medium |
24598986
|
| 2014 |
In mammalian cells, LUMA (TMEM43) localizes not only at the nuclear envelope but also as a cytoplasmic plaque constituent of zonula adhaerens and punctum adhaerens in diverse epithelia and in composite junctions (CJs) of myocardiac intercalated disks, where it colocalizes with other CJ marker proteins. |
Immunolocalization with high-specificity antibodies in diverse mammalian tissues and cell cultures |
Cell and tissue research |
Medium |
24770932
|
| 2016 |
TMEM43/LUMA is a critical component of the EGFR signaling network that mediates EGFR-induced NF-κB activation. Upon EGF stimulation, EGFR recruits TMEM43, which then interacts with the scaffold protein CARMA3 and its associating complex to induce downstream NF-κB activation. TMEM43 deficiency impairs colony formation, anoikis resistance, migration, invasion, and tumor progression in vivo. |
Bimolecular Fluorescence Complementation-based functional genomics screen, co-immunoprecipitation, knockdown studies, in vitro functional assays, in vivo tumor models |
Oncogene |
High |
27991920
|
| 2018 |
The TMEM43 S358L mutation leads to hyper-activated NF-κB signaling in heart tissues and primary cardiomyocytes, which directly drives expression of pro-fibrotic TGFβ1 and enhances downstream TGFβ signaling, contributing to cardiac fibrosis in ARVC. |
TMEM43 S358L knock-in mouse model, NF-κB reporter assays, gene expression analysis in heart tissue and primary cardiomyocytes |
Protein & cell |
Medium |
29980933
|
| 2018 |
TMEM43 (Luma) is dispensable for murine cardiac development and function; germline null mice are viable with normal cardiac function and normal response to pressure overload. Localization and expression of other LINC complex components in cardiac myocytes and fibroblasts is unaffected by global loss of Luma. Furthermore, Luma S358L knock-in mice display normal cardiac function and morphology. |
Germline null mouse generation, Luma S358L knock-in mouse generation, echocardiography, transverse aortic constriction, immunofluorescence, immunoblotting |
Cardiovascular research |
High |
29040414
|
| 2021 |
Haploinsufficiency of Tmem43 in cardiac myocytes (Myh6-Cre:Tmem43W/F mice) activates the DNA damage response (DDR) and TP53 pathway, leading to increased senescence-associated secretory phenotype (SASP) markers and downstream phospho-SMAD2/phospho-SMAD3 activation, resulting in age-dependent pro-fibrotic cardiomyopathy with fibrosis, adipogenesis, and apoptosis. |
Cardiac-specific conditional knockout mouse model (Myh6-Cre x floxed Tmem43), cardiac myocyte transcriptome sequencing, immunoblotting for DDR/TP53/SASP markers, histology |
Cardiovascular research |
High |
33070193
|
| 2021 |
A nonsense variant in TMEM43 (p.Arg372Ter) causes auditory neuropathy spectrum disorder (ANSD). TMEM43 physically interacts with Connexin26 and Connexin30 gap junction channels in cochlear glia-like supporting cells (GLSs). The p.Arg372Ter variant disrupts passive conductance current in GLSs in a dominant-negative fashion. |
Linkage analysis and exome sequencing, knock-in mouse model, electrophysiology (passive conductance current measurement), co-immunoprecipitation/interaction assays |
Proceedings of the National Academy of Sciences of the United States of America |
High |
34050020
|
| 2021 |
TMEM43 physically interacts with the KCNK3 (TASK-1) two-pore domain K+ channel in the cochlea. The intracellular loop domain of TMEM43 is responsible for TASK-1 binding. Gene silencing of Task-1 results in significantly reduced passive conductance current in cochlear glia-like supporting cells. |
Co-immunoprecipitation, Duolink proximity ligation assay, domain deletion analysis, siRNA knockdown with electrophysiology |
Experimental neurobiology |
High |
34737237
|
| 2022 |
TMEM43 overexpression inhibits LPS-induced ferroptosis in cardiomyocytes by suppressing P53 and ferritin levels while enhancing GPX4 and SLC7A11 expression. TMEM43 knockdown aggravates LPS-induced lipid peroxidation and ferroptosis. |
AAV9-mediated cardiac overexpression/knockdown in mice, siRNA/adenoviral overexpression in H9c2 cells, ferroptosis markers (MDA, iron density, GPX4, SLC7A11), ferrostatin-1 rescue experiment |
Cells |
Medium |
36230956
|
| 2022 |
In a zebrafish model, the p.S358L mutant TMEM43 protein is unstable and partially redistributes from the nuclear membrane into the cytoplasm in embryonic and adult hearts. Overexpression of wild-type TMEM43 activates the mTOR pathway and ribosome biogenesis, leading to cardiomyocyte hypertrophy. |
Transgenic zebrafish overexpression lines (Tol2-system), CRISPR/Cas9 knockout, immunofluorescence, transcriptomic profiling, electron microscopy |
International journal of molecular sciences |
Medium |
36076925
|
| 2022 |
TMEM43 promotes pancreatic cancer progression by stabilizing PRPF3 (preventing its degradation) and by regulating the RAP2B/ERK signaling axis, as identified by co-immunoprecipitation followed by mass spectrometry. |
Co-immunoprecipitation, protein mass spectrometry, in vitro knockdown/overexpression assays, in vivo tumorigenicity assay |
Cellular & molecular biology letters |
Medium |
35260078
|
| 2022 |
In the TMEM43 S358L Drosophila model, the conserved serine at position 333 (homologous to human S358) is critical for physiological function. The S333L substitution causes impaired energy homeostasis and lipid metabolism, cardiac arrhythmias, and premature death. Similar metabolic impairments were confirmed in a murine Tmem43 disease model. |
CRISPR/Cas9 CG8111 knockout, transgenic overexpression of CG8111 p.S333L in Drosophila, metabolomic and proteomic analyses, cardiac function assay in flies |
Cellular and molecular life sciences : CMLS |
Medium |
35869176
|
| 2023 |
In the TMEM43 S358L knock-in mouse model, TMEM43 and β-catenin expression are diminished in the heart while junctional plakoglobin (JUP) translocates into nuclei of mutant cardiomyocytes, indicating dysregulation of the WNT-β-catenin pathway. Conversely, in the small intestine of mutants, β-catenin and Ki-67 are overexpressed alongside elongated villi and fatty infiltration, indicating organ-specific pathway alterations. |
Knock-in mouse model (heterozygous and homozygous), immunohistochemistry, microarray transcriptome analysis, protein expression analysis, electron microscopy, histology |
American journal of physiology. Heart and circulatory physiology |
Medium |
37083466
|
| 2024 |
USP7 deubiquitinase regulates TMEM43 protein stability through deubiquitination. TMEM43 in turn interacts with and activates VDAC1, promoting hepatocellular carcinoma progression through a USP7/TMEM43/VDAC1 axis. |
Co-immunoprecipitation, western blot for ubiquitination, CCK-8, flow cytometry, Transwell assays |
Translational gastroenterology and hepatology |
Medium |
38317750
|
| 2025 |
TMEM43 localizes at the ER/SR membrane and interacts with the outer mitochondrial membrane protein VDAC (Porin) in Drosophila. The p.S333L mutation (analogous to human p.S358L) abolishes this interaction, causing breakdown of mitochondrial membrane potential, increased reactive oxygen species, and severe mitochondrial ultrastructural defects. Similar mitochondrial ultrastructural defects were observed in human right ventricular myocardium from TMEM43 p.S358L carriers, suggesting impaired ER/SR-mitochondrial contact sites as a key pathomechanism. |
Immunofluorescence localization, protein interaction assays (Drosophila), mitochondrial membrane potential assay, ROS measurement, ultrastructural electron microscopy (Drosophila and human cardiac tissue) |
Cellular and molecular life sciences : CMLS |
High |
41236655
|
| 2025 |
Proteomic screening by quantitative IP-mass spectrometry identified 166 differential binding partners of TMEM43 vs. TMEM43 p.S358L. VDAC1 and VDAC2 binding to the TMEM43 p.S358L mutant is significantly decreased. Reduced VDAC binding mediates mitochondrial dysfunction in H9c2 cardiac myoblasts expressing TMEM43 p.S358L. |
Quantitative immunoprecipitation-mass spectrometry, immunofluorescence, TurboID proximity labeling, mitochondrial functional assays in H9c2 cells |
PloS one |
Medium |
41411330
|
| 2025 |
TMEM43 localizes in the endoplasmic reticulum and nuclear lamina. The p.S358L mutation alters interaction with proteins of ER and mitochondrial membranes. Mutant hiPSC-CMs show lipid accumulation, decreased lipid metabolism capacity, lower ATP:ADP ratio, and diminished contraction frequency. Pull-down experiments reveal differential interacting proteins at ER-mitochondrial contact sites, suggesting that the mutation impairs ER-mitochondrial interactions affecting lipid homeostasis and energy supply. |
Sucrose-gradient ultracentrifugation, mass spectrometry, HA-tag pull-down, lipidomics, proteomics, ATP/ADP measurement, contractility assay in hiPSC-CMs, metabolomics in human myocardium |
Circulation. Genomic and precision medicine |
High |
41919408
|
| 2025 |
TMEM43 interacts with lamin B2. The TMEM43-P386S mutation induces lamin B2 mislocalization and abnormal nuclear envelope structure in ARVC iPSC-CMs, resulting in decreased chromatin accessibility at promoters of downregulated genes including RYR2. RYR2 proteins are downregulated and grouped into smaller clusters, contributing to enhanced SR Ca2+ leak and arrhythmic phenotype. This phenotype was preventable by flecainide. |
iPSC-CMs from mutation carriers, co-immunoprecipitation (TMEM43-lamin B2), Tau-STED super-resolution imaging (RYR2 clusters), chromatin accessibility assay, Ca2+ imaging, knock-in mouse model, flecainide treatment |
Advanced science |
High |
40948388
|
| 2025 |
Overexpression of wild-type TMEM43 in double transgenic mice (expressing both WT and S358L TMEM43) delays ARVC5 onset, improves cardiac contraction, reduces cardiomyocyte death and myocardial fibrosis, and improves survival. Systemic delivery of AAV9 carrying codon-optimized WT-TMEM43 prevents ventricular dysfunction and ECG abnormalities induced by S358L-TMEM43 in mice. |
Double transgenic mouse model (WT + S358L TMEM43), AAV9 gene delivery, echocardiography, ECG, histology, survival analysis |
Circulation research |
High |
40091736
|
| 2026 |
In a Drosophila CRISPR/Cas9 knock-in model of Tmem43 p.S333L (equivalent to human p.S358L), flies show reduced lifespan, smaller body size, lipid droplet accumulation, and mitochondrial defects. Proteomic and lipidomic profiling revealed misregulation of energy metabolism, reduced fatty acid synthesis and β-oxidation, altered peroxisomal pathways, elevated phosphatidylethanolamine and phosphatidylinositol levels, and reduced triacylglycerols. Ultrastructural analyses confirmed mitochondrial degradation in muscle tissue. |
CRISPR/Cas9 knock-in Drosophila model, lipidomics, proteomics, electron microscopy, fatty acid oxidation assays |
Biology open |
Medium |
41873591
|