| 2011 |
TSC-22 facilitates TGF-β signaling by interacting with TGF-β type I receptor (TβRI) and Smad7 in mutually exclusive ways, disrupting the Smad7/Smurf complex association with TβRI and thereby preventing ubiquitination and degradation of the receptor, leading to enhanced Smad2/3 phosphorylation and transcriptional responsiveness. This promotes cardiac myofibroblast differentiation. |
Co-immunoprecipitation, siRNA knockdown, Smad2/3 phosphorylation assays, fibrotic gene expression analysis in isoproterenol-induced rat myocardial fibrosis model |
Molecular and cellular biology |
High |
21791611
|
| 2005 |
Tsc-22 binds to Smad3 and Smad4 and modulates their transcriptional activity to enhance TGF-β-dependent signaling, and promotes erythroid cell differentiation. |
Co-immunoprecipitation, transcriptional reporter assays, cell differentiation assays |
Molecular and cellular biochemistry |
Medium |
15881652
|
| 2010 |
TGF-β up-regulates TSC-22 protein post-transcriptionally by reducing Ybx1-mediated ribonucleoprotein complex formation with TSC-22 mRNA (through miR-216a-mediated Ybx1 down-regulation); elevated TSC-22 then interacts with Tfe3 at E-box enhancers of the Col1a2 gene to drive collagen expression in renal mesangial cells. |
ChIP, Co-immunoprecipitation, RNA immunoprecipitation, miRNA mimic/inhibitor treatment, shRNA knockdown, luciferase reporter assays |
The Journal of biological chemistry |
High |
20713358
|
| 2003 |
TGF-β1 up-regulates TSC-22 mRNA through mRNA stabilization rather than transcriptional activation; three AUUUA (Shaw-Kamens) sequences in the TSC-22 mRNA 3'-UTR act as destabilizing elements, and TGF-β1 reduces binding of a 40 kDa protein to this element to stabilize the mRNA. |
Promoter luciferase reporter assay, RNA-binding protein gel shift assay, mRNA stability assay with heterologous reporter |
Biochemical and biophysical research communications |
Medium |
12767908
|
| 2000 |
TSC-22-GFP fusion protein localizes to the cytoplasm in living cells but translocates to the nucleus upon induction of apoptosis; nuclear TSC-22 shows transcription-regulatory activity in a cell-type-dependent manner. |
Live-cell fluorescence microscopy of TSC-22-GFP fusion protein, GAL4 fusion reporter assay in yeast and mammalian cells |
Biochemical and biophysical research communications |
Medium |
11095965
|
| 2002 |
Cytoplasmic localization of TSC-22 and its translocation from cytoplasm to nucleus is required for radiation-induced apoptosis; the nuclear export signal-containing full-length TSC-22 in the cytoplasm markedly enhances radiation sensitivity, while nuclear-restricted TSC-22 (NLS-TSC-22LZ) has minimal effect. |
Stable transfection with domain-deletion constructs (TSC-22FL, TSC-22LZ, NLS-TSC-22LZ), radiation sensitivity assays, fluorescence microscopy |
Biochemical and biophysical research communications |
Medium |
11944908
|
| 2002 |
The leucine zipper domain of TSC-22 is the active domain responsible for inhibiting anchorage-independent growth; the full-length TSC-22 (cytoplasmic) had weaker effects than leucine zipper constructs expressed in both cytoplasm and nucleus. |
Stable transfection with domain-deletion constructs, anchorage-independent colony formation assay |
Oncology reports |
Medium |
11836610
|
| 2012 |
TSC-22 physically interacts with the region between amino acids 100–200 of p53 and inhibits HDM2- and HPV E6-mediated poly-ubiquitination of p53, thereby protecting p53 from proteasomal degradation and activating p21Waf1/Cip1 and PUMA expression. TSC-22 knockdown enhanced p53 poly-ubiquitination. |
Co-immunoprecipitation, siRNA knockdown, ubiquitination assay, xenograft mouse model |
PloS one |
Medium |
22870275
|
| 2011 |
TSC22D1 exists as two isoforms (short and long) with opposing functions in BRAF(E600)-induced oncogene-induced senescence (OIS): the short isoform is upregulated and promotes senescence, while the large isoform is degraded by the proteasome. Both form complexes with their dimerization partner THG1 (TSC22 homologue gene 1). TSC22D1 acts as a downstream effector of C/EBPβ and controls p15(INK4B) and inflammatory factors during OIS. |
Gene expression profiling, selective isoform depletion by shRNA, overexpression of large variant, proteasome inhibitor treatment, epistasis with C/EBPβ |
The EMBO journal |
High |
21448135
|
| 2009 |
TSC-22D1 isoform 2 (short) promotes apoptosis during mammary gland involution, while isoform 1 (long) suppresses TGF-β-induced cell death and enhances proliferation; these two isoforms have opposing roles in mammary epithelial cell survival. |
Overexpression and knockdown in mammary epithelial cell lines, cell death and proliferation assays, protein detection in mammary gland tissue |
Cell death and differentiation |
Medium |
19745830
|
| 2008 |
A C-terminal 86 amino acid fragment of TSC-22 (Tsc22(86)) suppresses Bax-induced apoptosis in yeast independently of the leucine zipper motif; a conserved 16-residue sequence within the TSC22 domain is necessary for this antiapoptotic function. |
Yeast two-hybrid screen, genome-wide two-hybrid, deletion mutagenesis, functional apoptosis suppression assay in yeast |
FEMS yeast research |
Medium |
18355271
|
| 2008 |
Fortilin interacts with TSC-22 (identified by yeast two-hybrid) and promotes TSC-22 degradation; overexpression of fortilin reverses TSC-22-mediated apoptosis in ovarian carcinoma cells, while fortilin siRNA increases apoptosis. |
Yeast two-hybrid, Co-immunoprecipitation, siRNA knockdown, apoptosis assay |
FEBS letters |
Medium |
18325344
|
| 2017 |
TSC-22 directly interacts with the intracellular tyrosine kinase insert domain (residues 539–749) of CSF-1R, blocking AKT and ERK signaling and suppressing NF-κB transcriptional activity; overexpression of TSC-22 decreases CSF-1R protein levels and suppresses cervical cancer cell proliferation and motility. |
Co-immunoprecipitation, domain mapping, AKT/ERK/NF-κB signaling assays, xenograft mouse model |
Oncotarget |
Medium |
29228668
|
| 2002 |
TSC-22 is a downstream effector of both PPARγ and TGF-β pathways in intestinal epithelial cells; expression of TSC-22 reduces cell growth and increases p21 levels, while a dominant-negative TSC-22 (with both repressor domains deleted) reverses growth inhibition and p21 induction caused by PPARγ or TGF-β activation. |
Transfection with wild-type and dominant-negative TSC-22, growth assays, p21 expression analysis, pathway epistasis |
The Journal of biological chemistry |
Medium |
12468551
|
| 2004 |
TSC-22 (XTSC-22) in Xenopus laevis is required for cell migration during gastrulation; morpholino knockdown causes defective blastopore closure due to impaired ectoderm cell migration and increased cell division, which is rescued by co-injection of p27Xic1 (a cyclin/Cdk inhibitor), placing TSC-22 upstream of cell-cycle regulation. |
Antisense morpholino knockdown, cell lineage tracing, whole-mount in situ hybridization, mRNA rescue, p27Xic1 epistasis |
Development, growth & differentiation |
Medium |
15610143
|
| 2007 |
TSC-22 targeted disruption in mice enhances proliferation and in vivo repopulation efficiency of hematopoietic precursor cells (HPCs), demonstrating a role for TSC-22 in regulating HPC function. |
Targeted gene disruption (knockout mouse), in vivo HPC repopulation assay |
Blood |
Medium |
19329776
|
| 2016 |
TSC-22 promotes IL-2-deprivation-induced apoptosis in T-lymphocytes by inhibiting GILZ mRNA transcription, preventing GILZ protein induction and thereby increasing BIM expression and caspase-9/-3 activation. |
Stable transfection, apoptosis assays (caspase activity, BIM expression), mRNA quantification, functional epistasis between TSC-22 and GILZ |
Journal of cellular biochemistry |
Medium |
26752201
|
| 2010 |
TSC22D1 is required for TGF-β1- and PDGF-BB-induced CNP (C-type natriuretic peptide) expression in human vascular smooth muscle cells; siRNA-mediated suppression of TSC22D1 by ~90% reduces TGF-β- and PDGF-stimulated CNP expression by 45–65%, establishing TSC22D1 as an enhancer of CNP transcription. |
siRNA knockdown, qRT-PCR, correlation of TSC22D1 and CNP mRNA induction |
American journal of physiology. Heart and circulatory physiology |
Medium |
20802130
|
| 2021 |
TSC22D1 family proteins have distinct intracellular localizations: TSC22D1-1 (long isoform) is predominantly nuclear, TSC-22 (TSC22D1-2, short) is cytoplasmic (mainly mitochondrial) and translocates to the nucleus after DNA damage, and TSC22D1-3 is in both compartments. Binding partners identified by mass spectrometry include Histone H1 (binding TSC22D1-2 and TSC22D1-3 in the nucleus) and GNL3/nucleostemin (binding TSC22D1-2 in the nucleus). |
Fluorescence microscopy of tagged proteins, subcellular fractionation, in vitro pull-down and in vivo co-immunoprecipitation followed by mass spectrometry |
International journal of molecular sciences |
Medium |
34681573
|
| 2019 |
TSC22D4–TSC22D1 short isoform heterodimers promote exit from cell proliferation and cell-cycle, whereas TSC22D1 long isoform is required for cell proliferation independently of TSC22D4; silencing specific isoforms alters cell-cycle progression in medulloblastoma cells. |
siRNA knockdown of specific isoforms, cell-cycle analysis, proliferation assays in DAOY medulloblastoma cells |
Journal of cellular physiology |
Medium |
30912127
|
| 2022 |
MEX3D (an RNA-binding protein) directly binds TSC22D1 mRNA and promotes its degradation, reducing TSC22D1 levels in cervical cancer cells. |
RNA pull-down, RNA immunoprecipitation, mRNA stability assay |
Cell death discovery |
Medium |
35513372
|
| 2025 |
TSC22D1 interacts with FoxO1 in pancreatic beta cells in a reciprocal regulatory manner; TSC22D1 depletion enhances beta cell identity gene expression (Ins1, Ins2, Pdx1, Slc2a2, Nkx6.1) and glucose-stimulated insulin secretion. Interactome analysis implicates TSC22D1 in mRNA processing, ribonucleoprotein complex biogenesis, and Golgi vesicle transport in beta cells. |
siRNA knockdown in INS-1E cells, co-immunoprecipitation, interactome mass spectrometry, RNA-seq, glucose-stimulated insulin secretion assay |
The FEBS journal |
Medium |
40679946
|
| 2025 |
TSC22D1 drives liver sinusoidal endothelial cell (LSEC) dysfunction and macrophage M1 polarization via the TWEAK/FN14 signaling pathway; TSC22D1 promotes endothelial-mesenchymal transition (EndMT) and microvascularization in LSECs, leading to pro-inflammatory cytokine secretion and M1 polarization. AAV8-shRNA inhibition of TSC22D1 reduced NAFLD progression in vivo. |
Single-cell RNA sequencing, TSC22D1 overexpression in LSECs, TWEAK inhibition, flow cytometry, ELISA, qPCR, in vivo AAV8-shRNA knockdown in NAFLD mice |
World journal of gastroenterology |
Medium |
40901684
|
| 2025 |
TSC22D1.1 (long isoform) localizes to WNK bodies (cytoplasmic biomolecular condensates) in the distal convoluted tubule and acts as a positive modulator of WNK4 activity, promoting NCC phosphorylation and sodium reabsorption in the kidney. TSC22D1 interacts with NRBP1 within this complex via RΦ-motif/CCT domain interaction. |
Fluorescence localization in DCT, HEK293 cell WNK4 activity assays with TSC22D1.1 overexpression, NRBP1 DCT-specific knockout mice, NCC phosphorylation assays |
bioRxivpreprint |
Medium |
|
| 2024 |
TSC22D1 contains an RΦ-motif (R-F-x-V/I) that interacts with the CCT-like domain of the pseudokinase NRBP1 and the CCT domains of OSR1/SPAK, connecting TSC22D1 to the WNK-OSR1/SPAK ion homeostasis signaling pathway. |
Motif prediction, biochemical binding assays, AlphaFold-3 structural modeling, immunoprecipitation/mass spectrometry validation |
bioRxivpreprint |
Low |
|
| 2011 |
TSC-22 acts as a suppressor of Gadd45b expression; siRNA-mediated knockdown of Tsc-22 in murine liver cells increases Gadd45b gene and protein expression, and oxazepam treatment decreases Tsc-22 with reciprocal increase in Gadd45b. |
siRNA knockdown, qRT-PCR, Western blot, chemical treatment (oxazepam) |
Toxicological sciences |
Low |
17533171
|
| 2022 |
TSC-22 directly interacts with BRD7 and potentiates BRD7-mediated inactivation of the ERK signaling pathway in ovarian cancer cells. |
Co-immunoprecipitation, ERK pathway activity assays, overexpression |
Development & reproduction |
Low |
36285148
|
| 2025 |
EBV infection reduces m6A methylation of TSC22D1 mRNA; YTHDF1 (an m6A reader) binds TSC22D1 mRNA and promotes its m6A-dependent degradation; YTHDF1 knockdown increases TSC22D1 mRNA stability and expression. |
MeRIP-seq, YTHDF1 knockdown, mRNA stability assay |
Microorganisms |
Medium |
41472023
|