| 2007 |
Human OLA1 (hOLA1) binds and hydrolyzes ATP more efficiently than GTP, establishing it as an ATPase rather than a GTPase within the Obg/YchF subfamily. X-ray crystal structure of hOLA1 bound to the non-hydrolyzable ATP analogue AMPPCP explained the altered nucleotide specificity compared to other Obg-family GTPases. |
Biochemical nucleotide-binding and hydrolysis assays; X-ray crystallography with AMPPCP-bound structure |
The Journal of biological chemistry |
High |
17430889
|
| 2009 |
OLA1 functions as a negative regulator of the cellular antioxidant response through nontranscriptional mechanisms. Knockdown increased resistance to oxidizing agents (tBH, diamide) and reduced intracellular ROS and glutathione depletion without altering antioxidant gene mRNA levels or requiring de novo protein synthesis. |
RNAi knockdown; OLA1 overexpression; cell viability and ROS assays; cycloheximide block experiments; qRT-PCR of antioxidant genes |
Proceedings of the National Academy of Sciences of the United States of America |
High |
19706404
|
| 2009 |
Knockdown of OLA1 inhibits breast cancer cell migration and invasion through modulation of intracellular ROS levels, linking OLA1's regulation of ROS to cytoskeletal motility. |
siRNA knockdown; wound-healing and transwell invasion assays; ROS measurement; N-acetylcysteine treatment |
Journal of Zhejiang University. Science. B |
Medium |
19882753
|
| 2013 |
OLA1 directly binds to the amino-terminal region of BRCA1 and to γ-tubulin; it interacts with the carboxy-terminal region of BARD1. OLA1 localizes to centrosomes in interphase and to the spindle pole in mitosis. OLA1 knockdown causes centrosome amplification and activation of microtubule aster formation. A cancer-derived mutation E168Q abrogates BRCA1 binding and fails to rescue centrosome amplification. |
Mass spectrometry identification; co-immunoprecipitation; direct binding assays; immunofluorescence localization; RNAi knockdown; rescue with mutant constructs |
Molecular cell |
High |
24289923
|
| 2013 |
OLA1 stabilizes HSP70 by binding to its carboxyl-terminus variable domain, thereby blocking recruitment of the E3 ubiquitin ligase CHIP and preventing CHIP-mediated ubiquitination and degradation of HSP70. OLA1 downregulation reduces steady-state HSP70 levels and impairs heat-shock-induced HSP70 induction, increasing cellular sensitivity to heat shock. |
RNAi knockdown; targeted gene disruption; OLA1 overexpression; protein-protein interaction (co-IP/pulldown); ubiquitination assay; thermal resistance assay |
Cell death & disease |
High |
23412384
|
| 2014 |
OLA1 negatively regulates cell-matrix adhesion and spreading. OLA1-deficient cells have elevated FAK protein levels and decreased Ser3 phosphorylation of cofilin, while OLA1-overexpressing cells show opposite changes, indicating OLA1 modulates adhesion at least partly through FAK expression and cofilin phosphorylation. |
RNAi knockdown; OLA1 overexpression; cell adhesion/spreading assays; western blot for FAK and p-cofilin |
Biochemical and biophysical research communications |
Medium |
24486488
|
| 2015 |
OLA1 inhibits protein synthesis and promotes the integrated stress response (ISR) by binding eIF2, hydrolyzing GTP in that context, and interfering with ternary complex (eIF2-GTP-tRNAi) formation. OLA1 depletion causes hypoactive ISR, reduces CHOP induction, and promotes tumor growth and metastasis in vivo. |
Co-immunoprecipitation (OLA1-eIF2 interaction); GTPase activity assay; ternary complex formation assay; polysome profiling; RNAi knockdown; xenograft tumor models |
Scientific reports |
High |
26283179
|
| 2016 |
OLA1 is a GSK3β-interacting protein and inhibits GSK3β activity by mediating its Ser9 phosphorylation, thereby suppressing GSK3β-mediated degradation of Snail, which promotes E-cadherin downregulation and contributes to TGF-β-induced epithelial-mesenchymal transition (EMT). |
Co-immunoprecipitation (OLA1-GSK3β); western blot for GSK3β Ser9 phosphorylation, Snail, and E-cadherin; RNAi knockdown; EMT assays with TGF-β treatment |
Oncotarget |
Medium |
26863455
|
| 2016 |
OLA1 is required for normal mammalian development. Ola1-knockout mouse embryos have growth retardation and developmental delay. Primary Ola1-/- MEFs show impaired proliferation due to defective cell-cycle progression, with reduced cyclins D1/E1, attenuated Rb phosphorylation, and elevated p21 protein. p21 accumulation is due to enhanced mRNA translation that is reversed by eIF2α dephosphorylation inhibitor, placing OLA1 upstream of eIF2-mediated p21 translational control. |
Ola1 knockout mice; primary MEF culture; BrdU/cell-cycle analysis; western blot; polysome/translation assays; eIF2α pharmacological manipulation; p21-/-/Ola1-/- double-knockout rescue |
Molecular and cellular biology |
High |
27481995
|
| 2018 |
OLA1 requires its interaction with BARD1 to properly regulate centrosome number. Three OLA1 missense mutants that fail to bind BARD1 are deficient in centrosome number regulation. Phosphomimetic mutations at specific OLA1 residues restore BARD1 binding and rescue centrosome amplification. BARD1 mutant V695L (cancer-associated) fails to bind OLA1 and cannot rescue BARD1 knockdown-induced centrosome amplification. |
Co-immunoprecipitation; site-directed mutagenesis of OLA1 (phosphorylation, acetylation, ATP-binding residues); overexpression of mutant constructs; RNAi knockdown/rescue; centrosome counting by immunofluorescence |
Molecular cancer research : MCR |
High |
29858377
|
| 2019 |
OLA1 is N-terminally methylated in vivo by the N-terminal methyltransferase NTMT1, as demonstrated by activity-based substrate profiling and validation in NTMT1 knockout cells. |
Activity-based substrate profiling with Hey-SAM analogue; CRISPR-Cas9 NTMT1 knockout HEK293FT cells; mass spectrometry validation |
Chemical science |
Medium |
31857877
|
| 2019 |
Decreased OLA1 expression in PPHN enhances CHIP affinity for the Hsp70-SOD2 complex, facilitating SOD2 ubiquitination and proteasomal degradation. OLA1 acts as a molecular chaperone whose stress-induced activity prevents CHIP-mediated SOD2 degradation; ola1-/- mice recapitulate PPHN phenotypes including SOD2 downregulation and pulmonary vascular remodeling. |
Patient/fetal lamb tissue analysis; OLA1 KO mice; co-immunoprecipitation of CHIP-Hsp70-SOD2; ubiquitination assays; right ventricular pressure measurement |
Hypertension (Dallas, Tex. : 1979) |
Medium |
31476900
|
| 2020 |
OLA1 localizes to meiotic spindles in mouse oocytes (co-localizing with spindle structures after GVBD, confirmed by nocodazole treatment). OLA1 knockdown results in abnormal/multipolar spindle assembly, premature anaphase onset due to precocious spindle assembly checkpoint (SAC) inactivation, and impaired germinal vesicle breakdown. |
Immunofluorescence/confocal microscopy; nocodazole treatment; siRNA microinjection; chromosome spreading; polar body extrusion assays |
PeerJ |
Medium |
31915569
|
| 2020 |
HIV p17 interacts with OLA1 and disrupts the OLA1-GSK3β complex, leading to GSK3β hyperactivation, suppression of autophagy, and enhanced proliferation of HIV-infected T cells under glucose starvation conditions. |
Co-immunoprecipitation (p17-OLA1, OLA1-GSK3β); autophagy flux assays; T cell proliferation assays under glucose starvation |
Journal of medical virology |
Medium |
32790080
|
| 2021 |
ZFAS1 lncRNA recognizes the OBG-type functional domain of OLA1, facilitating exposure of its ATP-binding site (NVGKST, residues 32–37), enhancing OLA1 protein ATPase activity, and accelerating ATP hydrolysis and the Warburg effect in colorectal cancer cells. |
RNA pulldown; RIP assay; ATP hydrolysis assay; ECAR/glycolysis assay; mutagenesis of OLA1 ATP-binding site |
Journal of hematology & oncology |
Medium |
34743750
|
| 2022 |
BARD1 acts as an ATPase activating protein (AAP) for OLA1. The BARD1 BRCT domain binds the OLA1 TGS domain via a conserved BUDR motif and allosterically increases OLA1 ATPase turnover number (kcat). Cancer-associated BARD1 mutation V695L reduces OLA1 binding and activation, as revealed by a 1.88 Å crystal structure of the V695L BRCT mutant. |
Enzyme kinetics assays; X-ray crystallography (BRCT V695L mutant at 1.88 Å); biophysical/biochemical binding assays; mutagenesis |
Biochimica et biophysica acta. General subjects |
High |
35134491
|
| 2022 |
OLA1 knockout in colorectal cancer cells activates GSK3β and downregulates HIF1α and its target CA9 at the mRNA/protein level, linking OLA1 to the HIF1α/CA9 hypoxic signaling axis through GSK3β. |
CRISPR-Cas9 OLA1 knockout; mRNA sequencing; western blot for GSK3β, HIF1α, CA9; xenograft tumor models |
BMC cancer |
Medium |
35440019
|
| 2023 |
Aurora A binds OLA1 and polyubiquitinates it, targeting OLA1 for proteasomal degradation. NEK2 phosphorylates OLA1 at T124, which increases OLA1 binding to Aurora A and enhances Aurora A-mediated polyubiquitination. The kinase activity of Aurora A suppresses its own E3 ligase activity toward OLA1. Reduction of centrosomal OLA1 by this mechanism promotes pericentriolar material protein recruitment in G2 phase, required for centrosome maturation. |
Co-immunoprecipitation; in vitro ubiquitination assay; mutagenesis (T124 phosphorylation site); proteasome inhibitor experiments; immunofluorescence of centrosomal OLA1; overexpression rescue |
Cell reports |
High |
37481721
|
| 2023 |
OLA1 phosphorylation at Ser232/Tyr236 triggers its translocation from cytoplasm/mitochondria into the nucleus. Subsequent phosphorylation at Thr325 switches its biochemical activity from ATPase to GTPase and promotes expression of nuclear-encoded mitochondrial bioenergetic genes. ERK1/2 drives this process and is restrained by PP1A. OLA1 T325A (phosphoresistant) mutant blocks nuclear translocation and compromises mitochondrial gene expression. OLA1 knockout mice have fewer mitochondria, lower ATP, and higher lactate. |
Phospho-site mutagenesis; subcellular fractionation; immunofluorescence; ATPase/GTPase activity assays with phosphomimetic mutants; ERK inhibition; PP1A manipulation; OLA1 KO mice; metabolite measurements |
American journal of respiratory cell and molecular biology |
High |
36481055
|
| 2024 |
HIV-1 p17 (but not HIV-2 or SIV p17) binds OLA1 and inhibits OLA1's interaction with STING, thereby blocking OLA1-mediated suppression of STING translocation and phosphorylation. OLA1 normally interacts with STING and inhibits STING activation upon cGAMP stimulation. HIV-1 p17 also specifically promotes OLA1 ATPase and GTPase activities. |
Co-immunoprecipitation (OLA1-STING, p17-OLA1); cGAMP stimulation assays; STING translocation/phosphorylation assays; comparative HIV-1 vs HIV-2/SIV p17 experiments; ATPase/GTPase activity assays |
Journal of cell science |
Medium |
38132845
|
| 2025 |
In fission yeast (S. pombe), Ola1 physically interacts with MAPK/Pmk1 and its upstream kinase Pek1 (MAPKK), inhibiting MAPK/Pmk1 signaling to prevent excessive mitochondrial ROS accumulation. Absence of Ola1 increases mtROS, promotes nuclear localization of Hsf1, and upregulates Ssa1 (Hsp70 homolog). |
Co-immunoprecipitation (Ola1-Pmk1, Ola1-Pek1); mitochondrial ROS measurements; ola1 deletion; Hsf1 localization assay; western blot |
Microbiological research |
Medium |
40543417
|
| 2025 |
OLA1 interacts with Keap1 and, when STING is activated, enhanced STING-OLA1 interaction disrupts the OLA1-Keap1 complex, liberating Keap1 to promote Nrf2 degradation and ferroptosis in granulosa cells. This STING-OLA1-Keap1-Nrf2 axis is mechanistically linked to premature ovarian failure. |
Co-immunoprecipitation (STING-OLA1, OLA1-Keap1); siRNA knockdown; Nrf2 protein stability assays; ferroptosis markers; murine POF model; molecular docking (Icariin-STING) |
International journal of biological macromolecules |
Medium |
41352507
|
| 2023 |
Vitexin binds OLA1 (identified by tissue thermal proteome profiling and molecular docking) and the OLA1-vitexin complex interacts with Keap1, disrupting the Keap1-Nrf2 interaction and activating Nrf2. siRNA knockdown of OLA1 in Caco-2 cells confirmed OLA1's role in mediating Nrf2 protein expression and anti-inflammatory effects. |
Tissue thermal proteome profiling; molecular docking; siRNA knockdown; Nrf2 protein level assays; inflammatory cytokine measurements |
Journal of agricultural and food chemistry |
Low |
37856434
|
| 2026 |
Bi-allelic loss-of-function variants in OLA1 cause a human neurodevelopmental disorder with joint hypermobility. Patient-derived fibroblasts recapitulate impaired migration and proliferation. Neurons derived from proband fibroblasts show impaired adhesion and cytoskeletal control. In C. elegans, ola-1 deficiency reduces neurite numbers and suppresses microtubule dynamics and axon regrowth, placing OLA1 in a pathway regulating cytoskeletal dynamics through FAK levels. |
Sanger/exome sequencing in 14 individuals from 9 families; proband-derived fibroblast migration/proliferation assays; iPSC-derived neuron adhesion/cytoskeletal assays; C. elegans ola-1 knockout; transcriptomics |
American journal of human genetics |
Medium |
41887223
|