| 1999 |
T-STAR/ETOILE (KHDRBS3) is an RNA-binding protein closely related to SAM68 that physically interacts with RBM (an RNA-binding protein encoded on the Y chromosome implicated in spermatogenesis), identified by yeast two-hybrid screen with testis cDNA. T-STAR/ETOILE fused with GFP accumulates in a novel nuclear compartment adjacent to the nucleolus when transfected into HeLa cells. |
Yeast two-hybrid screen, GFP transfection/live imaging |
Human molecular genetics |
Medium |
10332027
|
| 1999 |
SLM-2 (KHDRBS3) is an RNA-binding protein containing a GSG/STAR domain with ~70% sequence identity to SAM68. Unlike SLM-1, SLM-2 is not tyrosine phosphorylated by Src or p59(fyn), and does not associate with SH3 domains of p59(fyn), Grb-2, PLCγ-1, or p120(rasGAP), distinguishing it functionally from SLM-1 as a signaling adapter. |
In vitro kinase assay, SH2/SH3 domain pulldown, RNA-binding assay |
Proceedings of the National Academy of Sciences of the United States of America |
High |
10077576
|
| 2004 |
The nuclear tyrosine kinase BRK/Sik phosphorylates SLM-1 and SLM-2 (KHDRBS3), and this phosphorylation inhibits their RNA-binding activities. Active BRK/Sik expression increases nuclear retention of BRK/Sik itself. |
In vitro kinase assay, RNA-binding assay, mutagenesis, co-expression in cells |
The Journal of biological chemistry |
High |
15471878
|
| 2004 |
T-STAR (KHDRBS3) is targeted for proteasome-dependent degradation by the E3 ubiquitin ligases SIAH1 and SIAH2, which bind to an octapeptide sequence in human T-STAR. This SIAH-mediated degradation modulates T-STAR-dependent alternative splicing activity. Rodent T-STAR orthologues are not targeted by SIAH1 due to sequence divergence at the binding site. |
Yeast two-hybrid, co-immunoprecipitation, minigene splicing assay, Western blot, proteasome inhibitor treatment |
Human molecular genetics |
High |
15163637
|
| 2009 |
SLM-2 (KHDRBS3) binds RNA via direct U(U/A)AA repeat bipartite motifs identified by SELEX. The bipartite nature of the consensus sequence is essential for high-affinity RNA binding by SLM-2. |
SELEX (Systematic Evolution of Ligands by EXponential enrichment), in vitro RNA binding assay |
BMC molecular biology |
High |
19457263
|
| 2011 |
SerpinB5 physically interacts with KHDRBS3 in gastric cancer cells, confirmed by co-immunoprecipitation. KHDRBS3 in turn interacts with FBXO32 mRNA, as demonstrated by RNA co-immunoprecipitation assay. KHDRBS3 is primarily detected in the nucleus of normal mucosal cells. |
Yeast two-hybrid, co-immunoprecipitation, RNA co-immunoprecipitation, Western blot, immunohistochemistry |
Oncology reports |
Medium |
21725612
|
| 2013 |
T-STAR (KHDRBS3) functions as a potent splicing repressor of the alternatively spliced segment 4 (AS4) exons from Neurexin1-3 genes and exon 23 of Stxbp5l, identified by transcriptome-wide splicing analysis in T-STAR null mice. T-STAR regulates Neurexin2 AS4 through a UWAA-rich response element immediately downstream of the regulated exon. T-STAR protein concentration in forebrain-derived structures like hippocampus correlates with degree of Nrxn1-3 AS4 splicing repression. In the absence of T-STAR, Sam68 cannot compensate for Nrxn2 AS4 repression despite co-expression. |
T-STAR null mouse model, transcriptome-wide RNA-seq, minigene transfection splicing assay, RT-PCR, mutational analysis of response element |
PLoS genetics |
High |
23637638
|
| 2016 |
T-STAR and Sam68 STAR proteins dimerize through an unexpected dimerization interface, and this dimerization is crucial for their biological activity in alternative splicing regulation. Crystal/NMR structure established atomic-resolution RNA binding mode; dimer formation increases RNA affinity and enables functional target selection within the transcriptome. |
Crystal structure, NMR, mutagenesis of dimerization interface, RNA binding assay, splicing reporter assay |
Nature communications |
High |
26758068
|
| 2016 |
SLM2 (KHDRBS3) controls alternative splicing of Tomosyn2, LysoPLD/ATX, Dgkb, Kif21a, and Cask in addition to Neurexin1-3 AS4. SLM2 levels are maintained by a homeostatic feedback auto-regulation pathway. Loss of SLM2 decreases cortical neural network activity dependent on synaptic connections between SLM2-expressing pyramidal neurons and interneurons, and Slm2-null mice show anxiety and impaired novel object recognition. |
Slm2-null mouse, RNA-seq splicing analysis, multi-electrode array cortical network activity recording, behavioral testing |
Cell reports |
High |
28009295
|
| 2017 |
The density of shared RNA binding sites (UWAA repeats) around a target exon, rather than different paralog-specific protein-RNA contacts, determines functional specificity between SLM2 (KHDRBS3) and Sam68 on the Neurexin2 AS4 exon. Doubling binding site numbers switched paralog sensitivity. Protein domain-swap experiments identified a region including the STAR domain that differentiates SLM2 and Sam68 splicing activity. |
Domain-swap mutagenesis, binding site mutagenesis/addition, splicing reporter assay, in vivo cortex RNA binding analysis |
Nucleic acids research |
High |
27994030
|
| 2018 |
SALL4 upregulates KHDRBS3 expression, and KHDRBS3 in turn modulates CD44 alternative splicing, producing a CD44 variant (CD44v) lacking exons 8 and 9 that promotes cancer stemness (sphere formation, anoikis resistance) in basal-like breast cancer cells. |
shRNA knockdown, gene overexpression, sphere formation assay, splicing analysis, anoikis resistance assay |
Cancer medicine |
Medium |
29356399
|
| 2019 |
Metadherin interacts with T-STAR (KHDRBS3) and Sam68, demonstrated by yeast two-hybrid and immunoprecipitation. Metadherin influences splice site selection in a dose-dependent manner in CD44v5-luc minigene reporter assays, and T-STAR is significantly overexpressed in prostate cancer tissue compared to benign prostate. |
Yeast two-hybrid, co-immunoprecipitation, CD44v5-luc minigene splicing reporter assay, immunohistochemistry |
Cancers |
Medium |
31450747
|
| 2019 |
KHDRBS3 binds to circular RNA cDENND4C and increases its stability in glioma endothelial cells (GECs). The KHDRBS3/cDENND4C/miR-577 regulatory axis controls blood-tumor barrier permeability by modulating tight junction proteins ZO-1, occludin, and claudin-1. |
RNA immunoprecipitation, RNA stability assay, knockdown/overexpression, tight junction protein Western blot, BTB permeability assay |
Cell death & disease |
Medium |
31296839
|
| 2020 |
KHDRBS3 promotes cancer stem cell-like features in gastric cancer organoids by regulating CD44 variant expression, contributing to 5-FU resistance and multi-drug resistance. KHDRBS3 was identified as a splicing regulator of CD44 variants in this cancer context. |
Organoid culture, 5-FU resistance induction, microarray, siRNA knockdown, CD44 variant splicing analysis |
Oncogene |
Medium |
33046798
|
| 2021 |
SLM2 (KHDRBS3) binds to mRNAs encoding sarcomere constituents (MYL2, TNNI3, TNNT2, TPM1/2, TTN) in the human heart. Mechanistically, SLM2 mediates intron retention, prevents exon exclusion, and promotes alternative splicing of mRNA regions encoding the PEVK domain and I-band region of titin in dilated cardiomyopathy. |
RNA-seq in human heart, CLIP-seq/RNA immunoprecipitation, alternative splicing analysis, tissue-enrichment analysis |
Genomics, proteomics & bioinformatics |
Medium |
34273561
|
| 2021 |
KHDRBS3 promotes drug resistance and anchorage-independent growth in colorectal cancer by regulating CD44 variant expression and the Wnt signaling pathway. KHDRBS3-positive cells show efficient tumor formation and lung metastasis in immunodeficient mice. |
siRNA knockdown, organoid formation, spheroid assay, xenograft mouse model, CD44 splicing analysis, Wnt pathway analysis |
Cancer science |
Medium |
33423358
|
| 2021 |
SLM2 (KHDRBS3) knockdown in neurons reduces NRX AS4(-) isoform expression and weakens LRRTM2-induced synapse formation in cerebellar cultures. SLM2 modifies network formation in VIP-positive GABAergic interneurons through regulation of Nrxn splicing. |
shRNA knockdown in neurons, artificial synapse formation assay, immunostaining, RT-PCR for AS4 isoforms |
Neurochemical research |
Medium |
34196888
|
| 2022 |
KHDRBS3 interacts with lncRNA MIR17HG in epithelial ovarian cancer cells. Overexpression of KHDRBS3 promotes glycolysis and paclitaxel resistance, effects rescued by MIR17HG overexpression. MIR17HG negatively regulates CLDN6 by binding its 3'UTR, defining a KHDRBS3-MIR17HG-CLDN6 regulatory axis. |
RNA immunoprecipitation, MTT assay, colony formation, seahorse glycolysis assay, xenograft model, 3'UTR reporter assay |
Life sciences |
Medium |
35051418
|
| 2023 |
KHDRBS3 physically binds to YWHAZ mRNA (encoding 14-3-3ζ) as demonstrated by RNA pull-down and RNA immunoprecipitation assays, thereby upregulating 14-3-3ζ protein expression and promoting glycolysis and malignant progression in hepatocellular carcinoma. Silencing 14-3-3ζ reverses the pro-tumorigenic effects of KHDRBS3 overexpression. |
RNA pull-down, RNA immunoprecipitation, lentiviral knockdown/overexpression, xenograft model, seahorse glycolysis assay |
Cancer cell international |
Medium |
37848941
|
| 2023 |
KHDRBS3 interacts with circHECTD1 (as shown by RIP and RNA pull-down), enhancing EZH2 mRNA stability and increasing EZH2 protein levels, thereby promoting proliferation and migration of brain vascular smooth muscle cells. |
RIP, RNA pull-down, qRT-PCR, knockdown/overexpression, CCK8, transwell assays |
Journal of inflammation research |
Medium |
36998321
|
| 2025 |
circFOXP1-encoded protein p196 directly binds KHDRBS3 through its D2 domain (shown by Co-IP and RNA pull-down), forming a complex that stabilizes ULK1 mRNA, increasing ULK1 protein levels and activating autophagy to accelerate hepatocellular carcinoma progression. |
Co-immunoprecipitation, RNA pull-down, RIP, in vitro binding assay, loss/gain-of-function, xenograft |
International journal of nanomedicine |
Medium |
40292405
|
| 2001 |
T-STAR (KHDRBS3) functions as a growth inhibitor; overexpression in SV40-transformed immortalized human fibroblasts strongly reduces colony formation, and deletion of the RNA-binding domain abrogates this growth-inhibitory effect. T-STAR is downregulated in immortalized cells that arose after proliferative crisis. |
mRNA differential display, overexpression with RNA-binding domain deletion mutant, colony formation assay |
Cell growth & differentiation |
Medium |
11714634
|
| 2009 |
Mouse T-STAR (KHDRBS3) directly binds Fabp9 mRNA through sequences in its coding region and 3'UTR, identified from testis extract using SNAAP (isolation of specific nucleic acids associated with proteins). This suggests T-STAR regulates metabolism and expression of Fabp9 in spermatogenesis. |
SNAAP method (protein-mRNA pulldown from testis extract), direct binding assay |
Biochemistry. Biokhimiia |
Low |
19916944
|