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Most of the ryanodine receptor (zeige RYR3 Proteine) 1b (ryr1b) mRNA in mutants carried a nonsense mutation that was generated by aberrant splicing due to a DNA insertion in an intron of the ryr1b gene, leading to a hypomorphic condition in relatively relaxed mutants.
sepn1 (zeige SEPN1 Proteine) and ryr1 are required for the same cellular differentiation events and are needed for normal calcium fluxes
in our series subarachnoid hemorrhage patients have an increased frequency of rare RYR1 variants
Findings signal a potential association between malignant hyperthermia (MH) susceptibility and exertional rhabdomyolysis (ER); the presence of MH-causative mutations and putative deleterious RYR1 variants in ER patients without a history of adverse anesthetic reactions suggests their possible increased risk for MH
Thus, RYR1 mutations may lead to prolonged bleeding by altering vascular smooth muscle cell function. The reversibility of the bleeding phenotype emphasizes the potential therapeutic value of dantrolene in the treatment of such bleeding disorders.
Results show that in disease-associated RYR1 mutations, there is increased gain and Ca(2 (zeige CA2 Proteine)+) sensitivity for activation in a site-specific manner which suggest that divergent CICR (Ca(2 (zeige CA2 Proteine)+) -induced Ca(2 (zeige CA2 Proteine)+) release) activity may cause various disease phenotypes by specific mutations.
the RYR1 SNP rs35364374 was not associated with Aneurysmal Subarachnoid Hemorrhage or its clinical squeal.
level of myotubes MTM1 (zeige MTM1 Proteine) mutations do not dramatically affect calcium homeostasis and calcium release mediated through the ryanodine receptor 1, though they do affect myotube size and nuclear content..mature muscles such as those obtained from patient muscle biopsies exhibit a significant decrease in expression of the ryanodine receptor 1, a decrease in muscle-specific (zeige EIF3K Proteine) microRNAs and a considerable up-regulation of HDAC4 (zeige HDAC4 Proteine).
Allosteric mechanism of RyR1, including a key interaction between a peripheral domain and the Ca-binding EF hand domain
Data suggest that reduced SOICR (store overload-induced Ca2 (zeige CA2 Proteine)+ release) threshold is a common defect of malignant hyperthermia- or central core disease-associated RyR1 mutations; carvedilol (a beta (zeige SUCLA2 Proteine)-blocker), like dantrolene (a central muscle relaxant), can suppress RyR1-mediated SOICR. Here, human disease-associated point mutations were induced in recombinant rabbit RyR1 via site-directed mutagenesis.
results suggest that nine RyR1 mutants associated with skeletal muscle diseases were differently regulated by Ca(2 (zeige SYN3 Proteine)+) and Mg(2 (zeige MUC7 Proteine)+) Four malignant hyperthermia-associated RyR1 mutations in the S2-S3 loop conferred RyR2-type Ca(2 (zeige CA2 Proteine)+)- and Mg(2 (zeige MUC7 Proteine)+)-dependent channel regulation
This review summarizes the progress in the structural determination of RyR by cryoEM and, bearing in mind the leap in resolution provided by the recent implementation of direct electron detection, analyzes the first near-atomic structures of RyR.
Gain of Ca(2 (zeige CA2 Proteine)+)-induced Ca(2 (zeige CA2 Proteine)+) release activity of RyR1 is markedly lower than that of RyR3 (zeige RYR3 Proteine) in mammalian skeletal muscle, indicating selective stabilization of RyR1
In-depth structural analyses elucidated a novel channel-gating mechanism and a novel ion selectivity mechanism of RyR1.
the cryo-electron microscopy structures of rabbit RyR1 in three closed conformations at about 4 A resolution and an open state at 5.7 A, are reported.
Data suggest that RyR1 exhibits conformation consistent with an open-channel model sufficient for movement of Ca2 (zeige CA2 Proteine)+ except for a pore constriction site; molecular dynamics simulations suggest Ca2 (zeige CA2 Proteine)+ passage could be allowed by rotation of upper portion of pore-lining S6 helix away from 4-fold channel axis and twisting of Ile-4937 at channel constriction site out of the channel pore.
RyR1-G4934A had reduced K(+) conductance and ion selectivity compared with WT. Mutations further increasing the side chain volume at these positions (G4934V and G4941I) resulted in reduced caffeine-induced Ca(2 (zeige CA2 Proteine)+) release.
Structural insights into the roles of divergent regions in RyR1 allosteric regulation during excitation contraction coupling.
architecture of rabbit RyR1 at a resolution of 6.1 A, using electron cryomicroscopy
closed-state structure of the 2.3-megadalton complex of the rabbit skeletal muscle type 1 RyR (RyR1), solved by single-particle electron cryomicroscopy at an overall resolution of 4.8 A
Diminishing S-palmitoylation directly suppresses RyR1 activity as well as stimulus-coupled Ca(2 (zeige CA2 Proteine)+) release through RyR1.
Two regions of the ryanodine receptor (zeige RYR3 Proteine) calcium channel are involved in Ca(2 (zeige CA2 Proteine)+)-dependent inactivation
These results suggest that the heterogeneity of immunological and neuroendocrine response to exercise stress in pigs could be influenced by RYR1 gene mutation.
Interleukin 1, IL-2 (zeige IL2 Proteine), IL-10 (zeige IL10 Proteine), and TNF-alpha (zeige TNF Proteine) measures were positively intercorrelated in each of the three RYR1 genotype group
T-tubules proximity modulates RyR cluster properties resulting in intracellular heterogeneity of diastolic spark activity.
Results support the hypothesis that Ca(2 (zeige CA2 Proteine))(+) binding to CaM's C-terminal acts as the switch converting CaM from a RyR1 activator into a channel inhibitor.
The RYR1 genotype had a significant effect on IGF-2 expression in pig longissimus dorsi muscle.
Binding to RyR1 targets evokes significant changes in calmodulin structure and sensitivity.
Significant interactions between CAST and RYR1 genotypes indicate that the quality of meat influenced by RYR1 genotype may be modified by the simultaneous influence of genotype as regards the CAST locus
Our data suggest that non-coplanar PCBs are more potent and efficacious toward (MH)RyR1 than (Wt)RyR1, and have more profound effects on its cation regulation.
stimulation of the RyR1 malignant hyperthermia susceptible channel caused by affected inter-domain interaction between regions 1 and 2 is an underlying mechanism for dysfunction of Ca2 (zeige CA2 Proteine)+ homoeostasis seen in the malignant hyperthermia phenotype
altered luminal Ca(2 (zeige CA2 Proteine)+) regulation of RyR1 represents a primary causal mechanism of malignant hyperthermia
Results show that MG53 (zeige TRIM72 Proteine)-Orai1 (zeige TMEM132A Proteine) interaction enhances extracellular Ca2 (zeige CA2 Proteine)+ entry via Orai1 (zeige TMEM132A Proteine), and decreases intracellular Ca2 (zeige CA2 Proteine)+ release via RyR1 for skeletal muscle contraction.
This molecular rearrangement is compatible with direct inhibition of RyR opening by junctophilin-2 (zeige JPH2 Proteine) to intrinsically stabilise the Ca(2 (zeige CA2 Proteine)+) signalling properties of the junction and thus the contractile function of the cell.
These data demonstrate that modulating Ryrs has neuroprotective effects in nGD (zeige NGDN Proteine) through mechanisms that protect the mitochondria, autophagy, Ryr expression and enhance GCase (zeige GBA Proteine) activity
these findings suggest an important non-contractile role of RyR1 or RYR1-mediated Ca(2 (zeige CA2 Proteine)+) signaling during muscle organ development.
mutating residue E4242 affects RyR1 structures critical for retrograde communication with CaV1.1 (zeige CACNA1S Proteine)
High-intensity interval training exercise induces a ROS (zeige ROS1 Proteine)-dependent RyR1 fragmentation in muscles of recreationally active subjects, and the resulting changes in muscle fiber Ca(2 (zeige CA2 Proteine)+)-handling trigger muscular adaptations
The present study reveals that the C-terminal of the beta1a subunit changes conformation in the presence of RyR1 consistent with an interaction between the C-terminal of beta1a and RyR1 in resting myotubes.
Ryanodine receptor (zeige RYR3 Proteine) sensitization results in abnormal calcium signaling in airway smooth muscle cells.
major finding from this study is the novel region- and cell-specific relationship between the localization of the plasma membrane Kv2.1 (zeige KCNB1 Proteine) channel and intracellular RyR Ca2 (zeige CA2 Proteine)+ release channels
This gene encodes a ryanodine receptor found in skeletal muscle. The encoded protein functions as a calcium release channel in the sarcoplasmic reticulum but also serves to connect the sarcoplasmic reticulum and transverse tubule. Mutations in this gene are associated with malignant hyperthermia susceptibility, central core disease, and minicore myopathy with external ophthalmoplegia. Alternatively spliced transcripts encoding different isoforms have been described.
ryanodine receptor 1 (skeletal)
, ryanodine receptor type 1
, ryanodine receptor 1a (slow muscle)
, ryanodine receptor alpha isoform
, central core disease of muscle
, ryanodine receptor 1
, sarcoplasmic reticulum calcium release channel
, skeletal muscle calcium release channel
, skeletal muscle ryanodine receptor
, type 1-like ryanodine receptor
, skeletal muscle-type ryanodine receptor
, type 1 ryanodine receptor
, ryanodine receptor 1, skeletal muscle
, ryanodine receptor 1-like, skeletal muscle
, calcium release channel
, porcine stress syndrome