| 1999 |
RLIM (RNF12) was identified as a RING-H2 zinc-finger protein that binds LIM domains and acts as a transcriptional corepressor by recruiting the Sin3A/histone deacetylase complex to LIM homeodomain transcription factors, inhibiting their functional activity. |
Co-immunoprecipitation, transcriptional reporter assays, in vivo chick wing overexpression |
Nature genetics |
High |
10431247
|
| 2009 |
RNF12/RLIM functions as a dose-dependent, X-encoded activator of X chromosome inactivation (XCI); additional copies of Rnf12 trigger XCI in male ES cells, and heterozygous Rnf12+/- female ES cells show markedly reduced XCI initiation, dependent on an intact open reading frame. |
Transgenic overexpression in mouse ES cells, heterozygous knockout ES cells, differentiation assays monitoring Xist RNA |
Cell |
High |
19945382
|
| 2009 |
RLIM directly interacts with TRF1 and targets it for ubiquitin-dependent proteasomal degradation, independently of Fbx4, thereby modulating telomere length; depletion of RLIM increases TRF1 levels and leads to telomere shortening. |
Co-immunoprecipitation, shRNA knockdown, overexpression, telomere length assays, proteasome inhibitor experiments |
The Journal of biological chemistry |
Medium |
19164295
|
| 2010 |
Maternal RLIM deposited in oocytes is required for imprinted X chromosome inactivation (iXCI) in mice; conditional knockout of Rnf12 in oocytes causes lethality in female embryos due to failure of Xist cloud formation and paternal X silencing, while RLIM is dispensable for random XCI in embryonic stem cells. |
Conditional oocyte-specific knockout mouse genetics, Xist RNA FISH, X-linked gene expression analysis |
Nature |
High |
20962847
|
| 2011 |
RNF12 acts in trans to activate Xist transcription and is essential for initiation of random XCI; Rnf12-/- female ES cells fail to initiate XCI, and RNF12 regulation does not operate through Tsix or Xist intron 1. |
Rnf12 knockout ES cell differentiation, Xist RNA FISH, gene expression analysis |
PLoS genetics |
High |
21298085
|
| 2011 |
Rnf12 expression in mouse ES cells is negatively regulated by the pluripotency transcription factors Nanog, Oct4, and Sox2, linking the XCI activator to the pluripotency network. |
Chromatin immunoprecipitation, reporter assays, factor knockdown/overexpression in ES cells |
Human genetics |
Medium |
21544581
|
| 2012 |
RNF12 directly ubiquitinates the pluripotency factor REX1, triggering its proteasomal degradation; REX1 binds Xist and Tsix regulatory regions and inhibits Xist transcription, so RNF12-mediated REX1 breakdown initiates XCI in a dose-dependent manner. |
Co-immunoprecipitation, in vitro ubiquitination assay, ChIP-seq, Rnf12-KO ES cells, Rex1 overexpression/knockdown, Xist RNA FISH |
Nature |
High |
22596162
|
| 2012 |
RNF12 specifically binds Smad7 and induces its polyubiquitination and proteasomal degradation, thereby potentiating TGF-β/BMP/Nodal–Smad signaling; RNF12-deficient mouse ES cells show elevated Smad7 and attenuated TGF-β responses. |
Co-immunoprecipitation, in vitro ubiquitination assay, RNF12 KO ES cells, zebrafish gain/loss-of-function, rescue experiments |
Molecular cell |
High |
22560923
|
| 2012 |
Paternal Rnf12/RLIM expressed in mammary glands is a critical survival factor for milk-producing alveolar cells; knockout of Rnf12 in mammary glands inhibits alveolar differentiation and causes apoptosis of differentiating alveolar cells, mediated by the paternal allele due to nonrandom maternal XCI in mammary epithelial cells. |
Conditional mammary gland knockout, pregnancy/lactation phenotyping, apoptosis assays, genetic complementation |
Cell |
High |
22541433
|
| 2013 |
RLIM/Rnf12 protein shuttles between nucleus and cytoplasm, regulated by phosphorylation of serine S214 within its nuclear localization sequence; blocking this shuttling (by expressing nuclear- or cytoplasmic-locked RLIM) inhibits alveolar cell survival activity. |
Phosphomimetic/phosphoresistant mutagenesis, subcellular fractionation, live-cell imaging, mammary alveolar cell survival assays |
Molecular biology of the cell |
High |
23904271
|
| 2014 |
RNF12 acts as a trans-acting, dose-dependent XCI activator that operates in concert with cis-regulatory elements (Jpx, Ftx, Xpr region) to activate Xist and overcome Tsix repression; RNF12 functions at two sequential steps: two active Rnf12 copies drive XCI initiation, and one copy must remain active for Xi establishment. |
X-pairing deletion ES cells, transgenic Rnf12 copy-number variation, Xist RNA FISH, genetic epistasis |
Molecular cell |
High |
24613346
|
| 2014 |
RLIM is dispensable for random XCI in the mouse embryonic epiblast; female cells lacking RLIM from pre-implantation stages still form Xist clouds and H3K27me3 foci and have full embryogenic potential, and RLIM levels are downregulated in cells undergoing rXCI. |
Mouse genetics (early conditional KO), Xist FISH, H3K27me3 immunostaining, western blot quantification |
Nature |
High |
24870238
|
| 2018 |
RNF12 XLID patient mutations specifically impair E3 ubiquitin ligase catalytic activity by either inactivating the RING domain or disrupting a distal regulatory region required for efficient ubiquitin transfer, thereby impairing ubiquitylation of developmentally relevant substrates (REX1, SMAD7) and disrupting stem cell maintenance and neural differentiation. |
In vitro ubiquitination assay with XLID mutants, ES cell differentiation, neural differentiation assays, site-directed mutagenesis |
Cell reports |
High |
29742418
|
| 2018 |
Loss of Rex1 rescues the rXCI phenotype in Rnf12-/- ES cells, and genetic ablation of Rex1 in Rnf12-/- mice rescues the iXCI phenotype, yielding viable fertile females with normal XCI; this establishes REX1 as the critical in vivo target of RNF12 in XCI. |
Double-knockout mouse genetics (Rnf12-/-:Rex1-/-), iXCI and rXCI phenotyping, Xist RNA FISH |
Nature communications |
High |
30420655
|
| 2018 |
RNF12 physically interacts with BRF1 (a TFIIIB subunit) and catalyzes Lys27- and Lys33-linked polyubiquitination of BRF1, negatively regulating RNA polymerase III-dependent transcription and cell proliferation. |
Co-immunoprecipitation, in vitro ubiquitination assay with linkage-specific analysis, Pol III transcription assays, cell proliferation assays |
The Journal of biological chemistry |
Medium |
30413534
|
| 2020 |
TRIM28 regulates RLIM protein levels and, through RLIM and MDM2, modulates p53 levels during lung tumorigenesis, placing RLIM in a sequential ubiquitination cascade: TRIM28→RLIM→MDM2→p53. |
Co-immunoprecipitation, overexpression/knockdown in lung cancer cells, xenograft models, western blot |
Cell death and differentiation |
Medium |
33328571
|
| 2016 |
RLIM associates with c-Myc in vivo and in vitro and promotes its polyubiquitination independently of Ser62/Thr58 phosphorylation; however, RLIM-mediated ubiquitination does not affect c-Myc stability but instead inhibits its transcriptional activity, restraining cell proliferation. |
Co-immunoprecipitation, in vivo ubiquitination assay, transcriptional reporter assays, cell proliferation assays |
PloS one |
Medium |
27684546
|
| 2016 |
RNF12 interacts with MDM2, targets it for ubiquitination and proteasomal degradation (independently of MDM2's self-ubiquitination), thereby elevating p53 levels and promoting p53-dependent cell growth suppression and apoptosis. |
Yeast two-hybrid, co-immunoprecipitation, in vivo ubiquitination assay, p53 reporter assays, apoptosis assays |
Cancer letters |
Medium |
26926424
|
| 2021 |
Rlim is highly expressed in post-meiotic round spermatids and Sertoli cells in mouse testis; systemic and spermatogenic-lineage-specific Rlim knockout results in lower numbers of mature sperm with excess cytoplasm, decreased sperm motility, and reduced in vitro fertilization rates, revealing a role for Rlim in spermiogenesis. |
Systemic and conditional (spermatogenic cell-specific) Rlim knockout mice, sperm morphology, motility, and IVF assays, immunofluorescence |
eLife |
High |
33620316
|
| 2022 |
RNF12 relieves REX1-mediated repression of Usp26, increasing USP26 abundance; USP26 then forms complexes with RNF12 and prevents RNF12 autoubiquitylation and degradation, establishing a feed-forward amplification loop that is required for germ cell differentiation and is disrupted by TOKAS and infertility-associated variants. |
Global quantitative proteomics, Co-IP, ubiquitination assays, Usp26 reporter assays, germ cell differentiation in vitro, patient variant functional testing |
Science signaling |
High |
35857630
|
| 2022 |
AKT phosphorylates RNF12, inducing its nuclear localization and maintaining its stability, which accelerates SMAD7 degradation and enhances TGF-β-driven breast cancer metastasis; RNF12 and AKT cooperate functionally in cancer cell migration. |
Co-immunoprecipitation, phosphorylation assays, nuclear/cytoplasmic fractionation, migration/invasion assays, zebrafish and murine xenograft metastasis models |
Cell death & disease |
Medium |
35013159
|
| 2022 |
RLIM ubiquitinates ZC4H2 (stabilizing it rather than targeting it for degradation), which in turn stabilizes RNF220, forming an RLIM–ZC4H2–RNF220 cascade required for full activation of Sonic hedgehog signaling in cerebellar granule neuron progenitors and medulloblastoma progression. |
Co-immunoprecipitation, ubiquitination assays, Shh signaling reporter assays, knockdown/overexpression in cerebellar cells |
Journal of molecular cell biology |
Medium |
35040952
|
| 2024 |
RNF12 is recruited to specific genomic locations via a consensus sequence motif in a non-catalytic basic region, enabling co-localization with REX1 at gene promoters; this chromatin targeting requires an N-terminal autoinhibitory mechanism and is critical for REX1 ubiquitylation and downstream gene regulation. |
ChIP-seq, proximity-labeling proteomics (BioID), mutagenesis of basic region, in vitro ubiquitination assay, gene expression analysis |
Life science alliance |
High |
38199845
|
| 2023 |
The Rlim–Rex1 axis is active in pre-implantation mouse embryos for iXCI regulation; upon implantation, Rex1 levels are downregulated independently of Rlim specifically in epiblast cells, explaining why Rlim is required for iXCI but not rXCI. |
Mouse genetics, immunofluorescence for Rex1 in blastocyst compartments, Rlim conditional KO embryo analysis |
Proceedings of the National Academy of Sciences of the United States of America |
High |
38113263
|
| 2020 |
KSHV LANA protein interacts with RLIM and promotes RLIM autoubiquitination and proteasomal degradation; LANA differentially modulates degradation of RLIM substrates, enhancing degradation of LDB1 and LMO2 but preventing RLIM-mediated degradation of LHX3 and TRF1. |
Co-immunoprecipitation (with proteasome inhibitor MG132), RING finger mutant RLIM resistance assay, western blot, transcriptional assays |
Journal of virology |
Medium |
31801865
|
| 2017 |
RLIM directly binds MIZ1, disrupting the interaction between c-MYC and MIZ1, and enhancing p15 and p21 transcription, thereby suppressing hepatocellular carcinoma cell proliferation. |
Co-immunoprecipitation, chromatin immunoprecipitation, cell cycle and proliferation assays, overexpression experiments |
Oncotarget |
Medium |
29137325
|
| 2014 |
RLIM directly interacts with Stathmin and promotes its ubiquitin-dependent proteasomal degradation; depletion of endogenous RLIM by siRNA increases Stathmin protein levels, leading to altered cell proliferation and cell cycle progression in osteosarcoma cells. |
Co-immunoprecipitation, siRNA knockdown, overexpression, proteasome inhibitor experiments, cell cycle analysis |
Cellular signalling |
Medium |
24686088
|
| 2025 |
Rlim in GABAergic neurons of the suprachiasmatic nucleus (SCN) regulates diurnal energy homeostasis: Rlim in RIP-Cre+ neurons governs daily thermogenic rhythms in brown adipose tissue, while Rlim in VIP-expressing neurons modulates diurnal feeding behavior; Rlim KO mice are lean and resistant to diet-induced obesity. |
Systemic and cell-type-specific conditional Rlim knockout mice, metabolic phenotyping, BAT thermogenesis measurements, feeding behavior monitoring |
bioRxivpreprint |
Medium |
40766619
|
| 2009 |
CLIM and RLIM function as ERα cofactors in breast cancer cells; RLIM co-localizes and interacts with ERα, associates with estrogen-responsive promoters, and enhances transcriptional activation of endogenous ERα target genes—opposing its inhibitory role on LIM-HD transcription factors. |
Co-immunoprecipitation from breast tumor tissue, chromatin immunoprecipitation on endogenous target promoters, siRNA knockdown, reporter assays |
Cancer research |
Medium |
19117995
|
| 2018 |
Rnf12 is necessary for initiation of retinal gliogenesis in the mouse retina; it acts as a negative regulator of LDB1, and its loss prevents the developmental decrease in the LHX2-LDB1 complex that normally accompanies gliogenesis onset. |
In vivo conditional retinal Rnf12 knockout, retinal cell fate analysis, immunostaining for LHX2/LDB1 complex |
Development (Cambridge, England) |
Medium |
29650591
|
| 2024 |
RLIM ubiquitinates PML (promyelocytic leukemia protein) and promotes its degradation; AKT phosphorylation of RLIM stabilizes it and enhances RLIM-mediated PML degradation, enabling colon cancer cell growth and metastasis promoted by CAF-secreted COMP. |
Co-immunoprecipitation, ubiquitination assays, phosphorylation assays, overexpression/knockdown, in vivo xenograft and metastasis models |
Journal of gastroenterology and hepatology |
Medium |
39162054
|