| 2001 |
BCL2L13 (Bcl-rambo) localizes to mitochondria and induces apoptosis via its unique C-terminal membrane-anchored domain (not via its BH motifs). The cell death activity is specifically blocked by caspase inhibitors and IAPs, but not by Bcl-xL, FLIP, or FADD-DN. No interaction was detected with either anti-apoptotic (Bcl-2, Bcl-xL, Bcl-w, A1, MCL-1, E1B-19K, BHRF1) or pro-apoptotic (Bax, Bak, Bik, Bid, Bim, Bad) Bcl-2 family members. |
Overexpression in mammalian cells, subcellular fractionation/localization, domain deletion analysis, caspase/IAP inhibitor rescue assays, yeast two-hybrid/co-IP for interaction studies |
The Journal of biological chemistry |
High |
11262395
|
| 2003 |
A splice variant of BCL2L13, Bcl-rambo beta, contains a 98 bp Alu-like insertion creating a premature stop codon, producing a BH4-only protein of 104 aa that lacks BH1/BH2/BH3 and the C-terminal membrane anchor. This cytosol-localized variant promotes etoposide- and Taxol-induced cell death; removal of the Alu sequence from Bcl-rambo beta abrogates its pro-apoptotic capability. |
Cloning and sequencing of splice variant, subcellular localization assay, domain deletion/mutagenesis, cell death assays with drug treatment |
FEBS letters |
Medium |
12527362
|
| 2014 |
BCL2L13 binds to pro-apoptotic ceramide synthases CerS2 and CerS6 via its unique C-terminal 250-aa sequence (between BH and membrane anchor domains), blocking CerS2/6 homo- and heteromeric complex formation and their enzymatic activity, thereby inhibiting ceramide-induced apoptosis upstream of BAX activation and mitochondrial outer membrane permeabilization. |
Co-immunoprecipitation, in vitro ceramide synthase activity assay, domain deletion mapping, loss-of-function (siRNA/shRNA) in vitro and in vivo tumor growth assays |
Proceedings of the National Academy of Sciences of the United States of America |
High |
24706805
|
| 2015 |
BCL2L13 functions as a mammalian homolog of yeast mitophagy receptor Atg32. Its BH domains are required for mitochondrial fragmentation, while its WXXL/LIR motif is required for mitophagy. BCL2L13 induces mitochondrial fragmentation and mitophagy independently of DNM1L/Drp1 and PARK2/Parkin, respectively, and can complement Atg32 deficiency in yeast. |
Overexpression and siRNA knockdown in HEK293 cells, domain mutagenesis (BH domain mutants, LIR motif mutants), mitophagy flux assays, cross-species complementation in atg32Δ yeast |
Autophagy |
High |
26506896
|
| 2015 |
BCL2L13 controls caspase-3 activity and cytochrome C release in hippocampal neural stem/progenitor cells. miR-124 and miR-137 cooperatively target BCL2L13 to fine-tune its expression, thereby modulating non-apoptotic caspase-3 functions. |
Comparative proteomics, siRNA knockdown, caspase-3 activity assay, cytochrome C release assay, microRNA target validation |
Scientific reports |
Medium |
26207921
|
| 2016 |
Human BCL2L13 localizes to mitochondria in Drosophila S2 cells and induces apoptosis (effector caspase activation) when overexpressed; this requires its C-terminal transmembrane domain. BCL2L13 genetically interacts with Drosophila adenine nucleotide translocators (ANT) and Atg8 (autophagy-related 8 protein) in vivo. |
Ectopic expression in Drosophila (GAL4-UAS system), immunofluorescence localization, caspase activity assay in eye imaginal discs, genetic epistasis/interaction screen, p35/DIAP rescue experiments |
PloS one |
Medium |
27348811
|
| 2018 |
BCL2L13 promotes beige adipocyte biogenesis and browning of white adipose tissue. BCL2L13 disruption inhibits the browning program (reduced Prdm16, Ucp1, Dio2, Adrb3), through regulation of mitochondrial dynamics and biogenesis (decreased fission/fusion genes, PGC-1α, mitochondrial respiratory chain complexes), independently of autophagy activity. |
siRNA knockdown in preadipocytes, cold exposure and β3-adrenergic agonist treatment in vivo, qPCR/western blot for browning markers and mitochondrial dynamics genes |
Biochemical and biophysical research communications |
Medium |
30352689
|
| 2019 |
BCL2L13 recruits the ULK1 complex to initiate mitophagy. The ULK1 complex (but not ULK1's yeast counterpart components for starvation autophagy) is required for BCL2L13-mediated mitophagy in mammalian cells. Interaction of LC3B with both ULK1 and BCL2L13 is important for this process. |
Yeast ATG mutant screening, mammalian cell ULK1 complex knockdown/knockout, co-immunoprecipitation of BCL2L13 with ULK1 complex components, mitophagy flux assays |
Cell reports |
High |
30625316
|
| 2019 |
Human BCL2L13 binds to VDAC1 (and previously reported ANT1/ANT2) at the outer mitochondrial membrane. VDAC1 and VDAC2 cooperatively promote effector caspase activation when co-expressed with BCL2L13. BCL2L13 (with its LIR motif mutated W276A/I279A) still causes mitochondrial fragmentation and perinuclear accumulation of fragmented mitochondria; VDAC knockdown also promotes this perinuclear accumulation. |
Co-immunoprecipitation, Drosophila genetic screen, caspase activity assay in 293T cells, siRNA knockdown of VDACs, live cell imaging of mitochondrial morphology |
Experimental cell research |
Medium |
31102594
|
| 2020 |
BCL2L13 (Bcl-rambo) selectively binds LC3C, GABARAP, and GABARAPL1 over other LC3/GABARAP family members. The selectivity depends on residues at the X2 position of BCL2L13's LIR motif and the HP1/HP2 sites of the LC3/GABARAP proteins. Disrupting this selective binding alters mitophagy induction in cells. |
In vitro binding assays, bioinformatics, site-directed mutagenesis of LIR and HP1/HP2 sites, mitophagy assays in cells with mutant constructs |
Biochemical and biophysical research communications |
Medium |
32828302
|
| 2022 |
PGAM5 interacts with BCL2L13 (Bcl-rambo) via the BCL2L13 transmembrane domain. PGAM5 co-expression promotes BCL2L13-dependent effector caspase activity but interferes with BCL2L13-dependent mitophagy (decreases LC3B-II accumulation induced by BCL2L13). The genetic interaction was confirmed in Drosophila where pgam5-2 knockdown partially rescues BCL2L13-induced rough eye phenotype. |
Co-immunoprecipitation, Drosophila genetic screen and rescue, caspase activity assay, LC3B-II immunoblot, domain mapping |
Experimental cell research |
Medium |
36075447
|
| 2023 |
BCL2L13 interacts with GRP75 (mortalin/HSPA9) via its No-BH domain, as confirmed by co-immunoprecipitation and GST pull-down. GRP75 co-expression facilitates elevated executioner caspase activity and PARP-1 cleavage induced by BCL2L13, and GRP75 knockdown suppresses BCL2L13-dependent caspase activation and cytochrome c release. Genetic interaction confirmed in Drosophila. |
Co-immunoprecipitation, GST pull-down, domain mapping, siRNA knockdown, caspase activity assay, PARP-1 cleavage assay, cytochrome c release assay, Drosophila genetic epistasis |
Scientific reports |
High |
37640805
|
| 2023 |
BCL2L13 promotes mitophagy through DNM1L (Drp1)-mediated mitochondrial fission in glioblastoma cells. BCL2L13 targets DNM1L at the Ser616 phosphorylation site, leading to mitochondrial fission and increased mitophagy flux, which promotes GBM cell proliferation and invasion. |
Overexpression and knockdown in GBM cell lines, phospho-DNM1L-Ser616 immunoblot, mitochondrial morphology assay, mitophagy flux assay, in vitro proliferation/invasion assays, in vivo xenograft |
Cell death & disease |
Medium |
37660127
|
| 2023 |
Knockout of Bcl2l13 in mice has a statistically robust effect on germline purifying selection against transmission of a pathogenic heteroplasmic mtDNA mutation (C5024T in tRNAAla), establishing BCL2L13-dependent mitophagy as a contributor to maternal mtDNA quality control. |
Mouse knockout genetics, heteroplasmy quantification across generations, comparison with Parkin KO, Ulk1 KO, and Ulk2 KO mouse models |
PLoS genetics |
High |
36608143
|
| 2024 |
BCL2L13 is localized at mitochondria, ER, and mitochondria-associated membranes (MAMs) in mammalian cells. Loss of Bcl2l13 in zebrafish impairs skeletal muscle structure and function, alters cytosolic Ca2+ release and mitochondrial Ca2+ uptake, and decreases mitochondrial complex activity, without changing ER-mitochondria contact site number. |
Organelle fractionation, immunolocalization, zebrafish bcl2l13 knockout, calcium imaging, mitochondrial complex activity assay, siRNA knockdown in C2C12 cells |
iScience |
High |
39175772
|
| 2024 |
BCL2L13 interacts with LC3 to regulate receptor-mediated mitophagy in human saphenous vein endothelial cells during oxidative stress. o8G modification of miR-6513-5p causes it to lose targeted regulation of BCL2L13, contributing to BCL2L13 upregulation during oxidative stress. |
Proteomics, Co-IP of BCL2L13 with LC3, BCL2L13 knockdown/overexpression, mitophagy assays, miRNA target validation with o8G modification analysis |
Advanced biology |
Medium |
39307929
|
| 2024 |
BCL2L13 exclusively uses the FIP200/ULK1 complex (not the WIPI-ATG13 complex) to initiate autophagosome biogenesis for mitophagy, distinguishing it from BNIP3/NIX receptors which use WIPI-ATG13, and from FKBP8 and TEX264 which can use both pathways. |
Reconstitution of autophagy initiation with purified components, genetic epistasis in cells with FIP200/ULK1 vs WIPI-ATG13 pathway perturbations |
bioRxivpreprint |
Medium |
bio_10.1101_2024.08.28.609967
|
| 2025 |
PRKAA2 (AMPKα2) is the kinase responsible for phosphorylating BCL2L13 at Ser272, which is required for BCL2L13-mediated mitophagy activation in pressure-overloaded heart. bcl2l13 knockout and non-phosphorylatable BCL2L13-S272A knock-in mice show suppressed mitochondrial fission and mitophagy under pressure overload, leading to reduced ATP production. No additive effects were found in bcl2l13/prkn double knockout. |
Bcl2l13 knockout mice, knock-in mice (BCL2L13-S272A), transverse aortic constriction model, in vitro kinase assay identifying PRKAA2 as the kinase, mitophagy flux assays, ATP production measurement |
Autophagy |
High |
39995141
|
| 2025 |
BCL2L13 phosphorylation at Ser261 and Ser275 is induced by mitochondrial stress (CCCP) in an AMPK-dependent manner. TBK1, not ULK1, directly phosphorylates BCL2L13 at Ser275, revealing that BCL2L13 is uniquely regulated by both AMPK and innate immune stimuli among mitophagy receptors. |
Mass spectrometry phospho-mapping, phospho-specific antibody development, genetic studies with AMPK/ULK1/TBK1 knockout or inhibition, CCCP treatment |
bioRxivpreprint |
Medium |
40672348
|
| 2026 |
MAP2K6 (MKK6) directly phosphorylates BCL2L13 at Ser426, enhancing the interaction between BCL2L13 and LC3B and thereby promoting mitophagy, inhibiting oxidative phosphorylation, and suppressing tumor growth in lung adenocarcinoma. MKK6 localizes to mitochondria and autophagosome interaction sites, and its pro-mitophagy function requires kinase activity but not p38 signaling. |
In vitro kinase assay, Co-IP of BCL2L13-LC3B with phospho-mutant BCL2L13-S426, subcellular fractionation of MKK6, loss-of-function studies in LUAD cells, mitophagy flux assay, OXPHOS measurement, in vivo tumor growth |
Cell reports |
High |
41886451
|
| 2026 |
GDF15 secreted by Omicron-stimulated epithelial cells upregulates BCL2L13 in T cells, driving bystander T-cell apoptosis. Genetic dampening of BCL2L13 blunts Omicron-specific high-intensity bystander apoptosis, and recombinant GDF15 increases BCL2L13 expression and apoptosis. |
Recombinant GDF15 treatment, BCL2L13 genetic knockdown, apoptosis assays, co-culture experiments with Omicron-infected epithelial cells |
Cell death discovery |
Medium |
41896204
|