| 1992 |
FKBP25 (FKBP3) has peptidylprolyl cis-trans isomerase (PPIase) activity comparable to FKBP12, binds rapamycin with higher affinity than FK506 (IC50 ~50 nM vs ~400 nM), and its PPIase activity is inhibited by rapamycin and FK506. |
In vitro PPIase assay with recombinant FKBP25; inhibition assays with rapamycin and FK506 |
The Journal of biological chemistry |
High |
1375932
|
| 1992 |
FKBP25 contains putative nuclear localization sequences in its sequence, distinguishing it from FKBP12 and FKBP13. |
cDNA cloning and sequence analysis |
The Journal of biological chemistry |
Medium |
1375932
|
| 1993 |
FKBP25 is predominantly localized to the nuclear fraction of T-lymphoma Jurkat cells and has the ability to bind DNA; the FKBP25/DNA complex is dissociable by high salt. FKBP12, which shares C-terminal homology with FKBP25, does not bind DNA. |
Cell fractionation, Western blotting with anti-FKBP25 antibodies, DNA-binding assay |
FEBS letters |
Medium |
8422914
|
| 1999 |
FKBP25 (FKBP3) expression is down-regulated following p53 induction by DNA-damaging stimuli in human and murine cell lines, identifying it as a transcriptional repression target of p53. |
Differential gene expression screening following p53 induction; confirmed in multiple cell lines with DNA-damaging stimuli |
Oncogene |
Medium |
10557083
|
| 2000 |
Endogenous FKBP25 from porcine brain co-isolates with high-mobility group II protein (HMG-II), and a residual pool associates with Rab5, guanylyl kinase, and phosphatidylethanolamine-binding protein. |
Immunoblotting, 2D-PAGE, Edman degradation, MALDI-TOF of anti-FKBP25 immunoprecipitates from porcine brain |
Archives of biochemistry and biophysics |
Low |
10900128
|
| 2009 |
FKBP25 interacts with MDM2, stimulates MDM2 auto-ubiquitylation and proteasomal degradation, leading to induction of p53 and p21. Depletion of FKBP25 by siRNA increases MDM2 levels and reduces p53 and p21. |
Co-immunoprecipitation, siRNA knockdown, western blotting for MDM2/p53/p21 levels |
FEBS letters |
Medium |
19166840
|
| 2013 |
Mutagenesis of FKBP25 revealed that certain mutations destabilize the FKBD domain fold entirely, while other 'surgical' mutations specifically ablate PPIase catalytic activity while maintaining domain structure, enabling distinction between catalytic and non-catalytic functions. |
Site-directed mutagenesis, in vitro PPIase assays, structural characterization of mutants |
Biochemical Society transactions |
Medium |
23697935
|
| 2014 |
FKBP25 interacts with nucleolin in an rRNA-dependent manner and associates with the immature pre-60S ribosomal subunit in nuclear extract but not with mature ribosomes, implicating FKBP25 in ribosome biogenesis. |
Proteomic characterization (mass spectrometry of immunoprecipitates), Co-IP with RNase treatment to assess rRNA-dependence |
RNA (New York, N.Y.) |
Medium |
24840943
|
| 2014 |
The N-terminal domain of FKBP25 (residues 1–73) adopts a novel 5-helix bundle structure termed the Basic Tilted Helix Bundle (BTHB) with a positively charged surface patch, which is implicated in DNA binding. |
NMR/structural determination of FKBP25(1-73), comparative structural analysis with HectD1 |
Biochemical and biophysical research communications |
Medium |
24667607
|
| 2014 |
Endogenous FKBP25 associates with core histones, spliceosomal complexes, ribosomal subunits, and polyribosomes; FKBP25 from polyribosomes can be released by added RNA or high salt, indicating RNA-mediated interaction. Rapamycin or FK506 only partially release FKBP25, suggesting additional protein-mediated binding via the PPIase cavity. |
Anti-FKBP25 immunoprecipitation from HeLa, K568, and porcine brain cells; polyribosome fractionation; salt/RNA competition; proteomics |
Biochemical and biophysical research communications |
Low |
24998444
|
| 2015 |
FKBP25 associates with TRPC6 (and TRPC3), and its interaction pattern with TRPCs is modified by FK506. Knockdown of FKBP25 significantly inhibits OAG-evoked non-capacitative calcium entry (NCCE) in MEG-01 and HEK293 cells. Biotinylation experiments indicate FKBP25 localizes to the plasma membrane in addition to intracellular compartments. |
Co-immunoprecipitation, siRNA knockdown, calcium entry assays, surface biotinylation in platelets and cell lines |
Biochimica et biophysica acta |
Medium |
26239116
|
| 2016 |
FKBP25 forms a rapamycin-induced ternary complex with the FRB domain of mTOR, and the crystal structure of FRB-rapamycin-FKBP25 was determined at 1.67-Å resolution, revealing conformational changes in FRB and covalent metalloid coordination at C2085 of FRB. |
Proximity biotin labeling (pBirA), immunoprecipitation, immunofluorescence, X-ray crystallography |
ACS central science |
High |
27610411
|
| 2016 |
NMR solution structure of full-length human FKBP25 shows the N-terminal HLH domain and C-terminal FKBD interact with each other; both domains participate in DNA binding, with the HLH domain making major-groove contacts and a basic FKBD loop contributing to minor-groove interactions. |
NMR structure determination, NMR-monitored DNA titration, mutagenesis, FKBP25-DNA complex modeling |
Nucleic acids research |
High |
26762975
|
| 2017 |
The N-terminal BTHB domain of FKBP25 selectively binds double-stranded RNA (dsRNA) over DNA or single-stranded oligonucleotides. This RNA-binding activity is required for FKBP25's nucleolar localization and for the vast majority of its protein interactions, including those with pre-60S ribosomes and early ribosome biogenesis factors. |
Biochemical dsRNA-binding assays, mutagenesis, immunofluorescence for localization, Co-IP for protein interactions in BTHB mutants |
Nucleic acids research |
High |
29036638
|
| 2017 |
FKBP3 promotes NSCLC cell proliferation via a pathway in which FKBP3 inhibits ubiquitination of Sp1, stabilizing Sp1, which drives HDAC2 promoter activity, increasing HDAC2 expression, leading to HDAC2-mediated deacetylation of histone H3K4 at the p27 promoter and reduced p27 expression. |
siRNA knockdown, overexpression, ChIP (HDAC2 at p27 promoter), ubiquitination assay for Sp1, western blotting, in vitro and in vivo proliferation assays |
Theranostics |
Medium |
28839465
|
| 2018 |
The FKBP domain of FKBP25 directly binds microtubules in vitro to promote their polymerization and stabilize the MT network. FKBP25 associates with the mitotic spindle, regulates entry into mitosis, and its knockdown leads to increased chromosome instability. Additionally, FKBP25 association with chromatin is regulated by Protein Kinase C (PKC) phosphorylation in a cell-cycle-dependent manner, disrupting FKBP25-DNA contacts during mitosis while maintaining spindle association. |
Direct microtubule-binding assay (in vitro), mitotic spindle immunofluorescence, chromosome instability assays in FKBP25 knockdown cells, PKC phosphorylation assays |
Nucleic acids research |
High |
29361176
|
| 2018 |
FKBP25 translocates from cytoplasm to nucleus in endothelial cells following oxygen-glucose deprivation (OGD) or peroxynitrite treatment, and in the nucleus interacts with 60S ribosomal protein L7a. Overexpression of FKBP25 protects endothelial cells against OGD injury. |
Western blot and immunofluorescence (localization), co-immunoprecipitation and FRET (interaction with L7a), overexpression survival assay |
Cellular physiology and biochemistry |
Medium |
29969783
|
| 2019 |
FKBP25's catalytic (PPIase) activity is required for promoting homologous recombination (HR) repair of DNA double-strand breaks (DSBs). FKBP25-depleted cells form fewer Rad51 repair foci and become dependent on Rad52-mediated single-strand annealing (SSA). Rapamycin treatment also impairs HR, at least partly independently of mTOR. |
FKBP25 knockdown, catalytic mutant expression, Rad51/Rad52 focus assays (immunofluorescence), genetic epistasis (Rad52 dependence), DSB reporter assays |
Biochemistry and cell biology |
High |
30620620
|
| 2019 |
FKBP3 downregulation in colorectal cancer cells reduces HDAC2 expression and P-gp levels, reduces p-AKT, and increases PTEN and cleaved caspase-3, sensitizing cells to oxaliplatin. Upregulation of HDAC2 counteracts FKBP3 knockdown-induced sensitization. |
siRNA knockdown and overexpression, western blotting, flow cytometry (apoptosis), rescue by HDAC2 overexpression |
Oncology reports |
Medium |
31524278
|
| 2021 |
FKBP3 indirectly binds the HIV-1 LTR through physical interaction with the transcription factor YY1, thereby recruiting HDAC1/2 to the LTR, promoting histone deacetylation and HIV-1 latency. FKBP3 knockout in latently infected cells activates latent HIV-1. |
CRISPR knockout in latent HIV-1 cell lines, Co-IP (FKBP3-YY1 interaction), ChIP (HDAC1/2 at LTR), primary latent cell model |
mBio |
Medium |
34281390
|
| 2021 |
Esterase D (ESD) interacts with FKBP25 via the N-terminal 1–90 aa domain of FKBP25. ESD reduces K48-linked poly-ubiquitin chains on FKBP25, thereby stabilizing cytoplasmic FKBP25. Stabilized FKBP25 then binds more mTORC1, suppressing mTORC1 activity and promoting autophagy. |
Yeast two-hybrid, Co-IP (endogenous and GFP-tagged FKBP25), ubiquitination assay, western blot for mTORC1/P70S6K/4EBP1 phosphorylation |
Cellular & molecular biology letters |
Medium |
34875997
|
| 2021 |
FKBP25 depletion in mouse oocytes causes abnormal spindle assembly, chromosome misalignment, and defective kinetochore-microtubule attachment, leading to elevated aneuploidy. Phosphorylation at serine 163 is identified as a key regulatory modification for FKBP25's function in meiotic maturation. |
siRNA knockdown in mouse oocytes, immunofluorescence (spindle/chromosome), aneuploidy scoring, site-directed mutagenesis (S163A) |
Frontiers in cell and developmental biology |
Medium |
33553183
|
| 2023 |
FKBP3 interacts with PARK7 (DJ-1); knockdown of FKBP3 enhances ubiquitination and degradation of PARK7, reducing Wnt/β-catenin pathway activation in DLBCL cells. |
Co-immunoprecipitation (FKBP3-PARK7 interaction), ubiquitination assay, western blotting for β-catenin pathway components, FKBP3 knockdown |
Journal of cellular and molecular medicine |
Low |
37987202
|
| 2023 |
FKBP25 knockdown in C2C12 myoblasts increases cell accumulation/viability and migration in vitro, independently of changes in tubulin dynamics. FKBP25 protein expression increases in hypertrophy (chronic mechanical overload) and muscle regeneration (mdx model) but decreases in denervation atrophy in vivo. |
Doxycycline-inducible knockdown in C2C12 cells, viability and migration assays, tubulin dynamics measurements, in vivo muscle adaptation models with western blotting |
The FEBS journal |
Low |
37345229
|