| 2012 |
Crystal structures of human CaMKIα (apo form and ATP-bound complexes) revealed that in the autoinhibited state, the activation segment adopts a helical conformation that together with the autoinhibitory segment constrains helices αC and αD in inactive conformations, sequesters Thr177 from phosphorylation, and occludes the substrate-binding site. In an ATP-bound active structure, the regulatory region is dissociated from the catalytic core and the catalytic site assumes an active conformation. |
X-ray crystallography of four structures of three CaMKIα truncates in apo and ATP-bound forms |
PloS one |
High |
23028635
|
| 2011 |
CaMKI (but not CaMKIV) contributes to stimulation of WIPI-1 puncta formation at the onset of autophagy downstream of Ca2+/CaMKK signaling; siRNA-mediated knockdown of CaMKI reduced starvation-induced autophagosomal membrane formation independently of AMPKα1/α2. |
siRNA knockdown of CaMKI, automated high-throughput WIPI-1 puncta analysis, LC3 lipidation assays, pharmacological inhibitors (STO-609, KN-93) |
Molecular pharmacology |
Medium |
21896713
|
| 2011 |
Epac1 and Rap1, in response to cAMP, activate CaMKI to phosphorylate Ser47 of GCM1; this phosphorylation facilitates interaction between GCM1 and the desumoylating enzyme SENP1, leading to GCM1 desumoylation and activation, thereby promoting syncytin-1/2 expression and trophoblast cell fusion. |
RNAi knockdown, phosphomimetic/non-phosphorylatable GCM1 mutants, co-immunoprecipitation, transient expression assays in BeWo placental cells |
Molecular and cellular biology |
High |
21791615
|
| 2013 |
The Epac1/Rap1/CaMKI signaling cascade phosphorylates HDAC5 on Ser259 and Ser498 in a Rap1- and CaMKI-dependent manner, causing nuclear export of HDAC5, thereby relieving HDAC5-mediated deacetylation and transcriptional repression of GCM1 and promoting syncytin-1 expression and placental cell fusion. |
Co-immunoprecipitation, immunofluorescence microscopy, phospho-specific antibodies against HDAC5, transient expression of constitutively active Epac1 and CaMKI, RNAi |
Molecular human reproduction |
High |
23867755
|
| 2012 |
CaMKI phosphorylates nuclear CaMK phosphatase (CaMKP-N/PPM1E; zebrafish ortholog zCaMKP-N) at Ser-480 in vitro; phosphorylation-mimic mutants (S480D/S480E) showed higher phosphatase activity and more potently attenuated CaMKII autophosphorylation in cells, indicating CaMKI activates CaMKP-N to provide negative feedback on multifunctional CaMKs. |
In vitro kinase assay with activated CaMKI, site-directed mutagenesis (S480A, S480D, S480E), solution-based phosphatase assay, co-transfection in Neuro2a cells with ionomycin treatment |
Biochemical and biophysical research communications |
High |
22627141
|
| 2015 |
CaMKIδ isoform is phosphatase-resistant compared to CaMKIα due to its N-terminal region structure (residues Pro-57, Lys-62, Ser-66, Ile-68, and Arg-76); CaMKP/PPM1F barely dephosphorylates CaMKIδ, allowing it to remain in a 'primed' phosphorylated, active state under low-Ca2+ conditions and to phosphorylate CREB without Ca2+ stimulation. |
Transient expression in 293T cells, in vitro dephosphorylation assay with CaMKP/PPM1F, chimeric and point mutants of CaMKIδ and CaMKIα, CREB phosphorylation assay |
Biochemistry |
High |
25994484
|
| 2022 |
Pitavastatin promotes mitochondrial calcium release into the cytoplasm, which phosphorylates CAMK1 (at Thr177); phosphorylated CAMK1 in turn phosphorylates PINK1 at Ser228, which recruits PARK2 (Parkin) and phosphorylates its Ser65 to activate mitophagy, improving endothelial progenitor cell proliferation. |
CAMK1 phosphorylation assays in EPCs, PINK1-KO mice, Atg7 silencing, intracellular calcium measurements, Western blot for phospho-CAMK1 (Thr177) and phospho-PINK1 (Ser228), pharmacological inhibition |
Communications biology |
Medium |
35145192
|
| 2021 |
In C. elegans thermosensory neurons, elevation of intracellular Ca2+ is necessary and sufficient for CMK-1 (CaMKI ortholog) nuclear import; Ca2+/CaM binding to CMK-1 increases its affinity for IMA-3 importin, driving nuclear translocation with slow kinetics that matches the timescale of sensory adaptation and is essential for experience-dependent behavioral plasticity and gene transcription control. |
In vivo live imaging in C. elegans, genetic manipulation (loss-of-function, constitutively active CMK-1), optogenetics to control Ca2+, co-immunoprecipitation of CMK-1 with IMA-3 importin |
eLife |
High |
34766550
|
| 2015 |
CMK-1 (CaMKI ortholog in C. elegans) regulates the dauer developmental decision as a function of feeding state; CMK-1 acts cell-autonomously in ASI neurons to regulate daf-7 TGF-β expression and non-cell-autonomously in AWC neurons to regulate daf-28 insulin-like peptide expression; food availability dynamically regulates subcellular localization of CMK-1 in AWC neurons. |
C. elegans genetics (cmk-1 mutants), cell-specific rescue experiments, transgenic reporters for daf-7 and daf-28, live imaging of CMK-1 subcellular localization |
eLife |
High |
26335407
|
| 2018 |
CMK-1 (CaMKI ortholog) is required in ASE chemosensory neurons for salt-aversive learning in C. elegans; loss of cmk-1 has subtle effects on sensory-evoked calcium responses in ASE axons and their modulation by salt conditioning, placing CMK-1 as a regulator of behavioral plasticity downstream of sensory calcium signals. |
C. elegans genetics (cmk-1 loss-of-function), microfluidics-based calcium imaging in ASE neurons, behavioral assays |
The Journal of neuroscience |
Medium |
29875264
|
| 2025 |
In C. elegans, CMK-1 (CaMKI ortholog) and calcineurin TAX-6 have antagonistic roles in modulating thermal nociception and adaptation to repeated stimuli; in vitro kinase assay combined with phosphoproteomics identified hundreds of CMK-1 substrates including the calcineurin A subunit TAX-6 (phosphorylated in its conserved regulatory domain); cell-specific analysis placed CMK-1 in AFD and ASER neurons and TAX-6 in FLP neurons and interneurons. |
In vitro kinase assays, mass-spectrometry-based phosphoproteomics, C. elegans genetics, pharmacological analyses, cell-specific genetic manipulations |
eLife |
Medium |
40305390
|
| 2008 |
Ca2+/calmodulin kinase I regulates Nur77 (Nr4a1) promoter activity in MA-10 Leydig cells; cAMP-mediated induction of Nur77 expression involves a CaMK-dependent pathway with distinct regulatory elements for basal and cAMP-induced Nur77 transcription. |
Promoter-reporter assays, pharmacological CaMK inhibition, transient transfection in MA-10 cells |
Journal of andrology |
Low |
18835829
|
| 2005 |
CKLiK (CaMKI-like kinase restricted to granulocytes) activity is induced by fMLP and PAF stimulation in parallel with intracellular Ca2+ rise; inhibition of CKLiK with a cell-permeable peptide inhibitor reduced phagocytosis, fMLP-induced ROS production, neutrophil migration, and β2-integrin-mediated adhesion. |
CKLiK peptide inhibitor (CKLiK297-321), kinase activity assays, phagocytosis assay, ROS/respiratory burst assay, migration assay, adhesion assay in primary human granulocytes |
Blood |
Medium |
15840691
|
| 2016 |
A constitutively active fragment of zebrafish CaMKIδ (zCaMKIδ(1-299)) lacking the autoinhibitory domain showed high, Ca2+-independent kinase activity comparable to CaMKK-activated wild-type CaMKIδ, confirming that the autoinhibitory domain suppresses basal kinase activity; the fragment exhibited broad substrate specificity similar to full-length activated CaMKIδ. |
Recombinant protein expression in E. coli, in vitro kinase activity assays, substrate specificity profiling, comparison with PKAc and CaMKII |
Biochemical and biophysical research communications |
Medium |
27207832
|
| 2024 |
CAMK1 overexpression in colorectal cancer cells inhibits PI3K phosphorylation and downstream AKT pathway activation; CAMK1 interacts with PI3K (by co-immunoprecipitation), and this interaction induces mitochondrial dysfunction (membrane potential depolarization, increased ROS), elevated Bax/Bcl-2 ratio, and Caspase-3 activation to promote anoikis; PI3K activator 740Y-P reversed these effects. |
CAMK1 overexpression in CRC cell lines, co-immunoprecipitation of CAMK1 with PI3K, phosphorylation assays, mitochondrial membrane potential (JC-1), ROS measurement, apoptosis assays, mouse tumor and metastasis models, rescue with PI3K activator |
FASEB journal |
Medium |
42175534
|
| 2024 |
IGF2BP3 promotes stability of CAMK1 mRNA through m6A modification, increasing CAMK1 protein levels; CAMK1 inhibits mitochondrial fission, and conditional knockout of CAMK1 in proximal tubules aggravates kidney injury and promotes mitochondrial fission in diabetic mice. |
Proximal tubule-specific CAMK1 knockout mice, STZ-induced diabetes model, RIP assay, dual-luciferase reporter assay, MeRIP (m6A), actinomycin D mRNA stability assay, electron microscopy of mitochondria, JC-1 staining |
Biochimica et biophysica acta. Molecular basis of disease |
Medium |
38216068
|