ライフサイエンスコーパス: RyR2

1 TPase 2b (SERCA2b) and ryanodine receptor 2 (RyR2).

2 led by Ca(2+) binding to CaM, rather than to RyR2.

3 pression of calcium channel genes Atp2a2 and Ryr2.

4 the expression of the calcium-handling gene Ryr2.

5 riers of the heterozygous mutation R4496C in RYR2.

6 eshold for SOICR leading to an inhibition of RyR2.

7 omoted by CaMKII phosphorylation of S2814 on RyR2.

8 modulates NaV1.5 and the ryanodine receptor, RyR2.

9 e EF-hand motifs on the Ca(2+) activation of RyR2.

10 dent protein kinase (CaMKII)-dependent leaky RyR2.

11 inding or the cytosolic Ca(2+) activation of RyR2.

12 eterminant of cytosolic Ca(2+) activation of RyR2.

13 hythmias induced by a CaMKII-dependent leaky RyR2.

14 inding), with Ki > 10 mum, for both RyR1 and RyR2.

15 cance of the corresponding EF-hand domain in RyR2.

16 ential for dantrolene inhibition of RyR1 and RyR2.

17 riggers Ca(2+)-CaM dependent inactivation of RyR2.

18 o determine their activity against mammalian RyR2.

19 The most common pathogenic mutations were RyR2 (2%), SCN5A (1%), and KNCQ1 (0.8%).

20 s-specified increases in Ca(2+) flux through RyR2/3 clusters selects for rapid propagation of Ca(2+)

21 ue in the S6 cytoplasmic region of the mouse RyR2 ((4876)QQEQVKEDM(4884)) and characterized their fun

22 Mutations in ryanodine receptor 2 (RyR2), a Ca(2+) release channel located in the sarcoplas

23 age of the increased nanotunnel frequency in RyR2(A4860G+/-) cardiomyocytes to investigate and accura

24 Mice heterozygous for the RyR2-A4860G mutation (RyR2-A4860G(+/-)) exhibited basal

25 terenol-stimulated ventricular myocytes, the RyR2-A4860G mutation decreased the peak of Ca(2+) releas

26 e heterozygous for the RyR2-A4860G mutation (RyR2-A4860G(+/-)) exhibited basal bradycardia but no car

27 Acute total Ryr2 ablation also impaired metabolism, but it was not c

28 d Ca(2+) release, but the molecular basis of RyR2 activation by cytosolic Ca(2+) is poorly defined.

29 hough the EF-hand domain is not required for RyR2 activation by cytosolic Ca(2+), it plays an importa

30 on RyR2 using a single-channel recording of RyR2 activity in artificial lipid bilayers.

31 Normal increases in RyR2 activity in response to increasing diastolic SR [Ca

32 DoxOL abolished the increase in RyR2 activity when luminal Ca(2+) was increased from 0.1

33 with the RyR2 complex shifts the increase in RyR2 activity with increasing luminal [Ca(2+)] away from

34 rodegenerative and seizure disorders, making RyR2 an attractive therapeutic target for drug developme

35 s, making Ca(2+)-CaM dependent regulation of RyR2 an important therapeutic target for cardiac alterna

36 mine the functionality of candidate REs near Ryr2, an up-regulated chamber-enriched gene, and in Cacn

37 METHODS AND CPVT-associated genes RYR2 and CASQ2 variants were identified in one of the wo

38 However, what inactivates RyR2 and how RyR2 inactivation leads to Ca(2+) alternans

39 ly, our results indicate that alterations of RyR2 and mitochondrial ROS generation form a vicious cyc

40 associated with increased phosphorylation of RyR2 and PLN, aberrant SR-Ca(2+) release in atrial cardi

41 limits steady-state phosphorylation of both RyR2 and PLN.

42 noprecipitation confirmed PPP1R3A binding to RyR2 and PLN.

43 rgeting and increase phosphorylation of both RyR2 and PLN.

44 pathogenesis by reducing PP1 binding to both RyR2 and PLN.

45 1r3a in mice impaired binding of PP1 to both RyR2 and PLN.

46 ously unknown SR nanodomain composed of both RyR2 and PLN/sarco/endoplasmic reticulum calcium ATPase-

47 CR revealed that isolated ICC expressed both RyR2 and RyR3 subtypes.

48 suppressed the luminal Ca(2+) activation of RyR2 and spontaneous Ca(2+) release in HEK293 cells duri

49 orporates Ca(2+)-CaM-dependent regulation of RyR2 and the L-type Ca(2+) channel.

50 ter the interaction of the CaM N-domain with RyR2 and thereby likely cause the arrhythmogenic phenoty

51 (2+) cycling, the type-2 ryanodine receptor (RyR2) and phospholamban (PLN), enhances the susceptibili

52 Ca(2+) release channel (ryanodine receptor, RyR2), and it appears that attenuated CaM Ca(2+) binding

53 Ca(2+) release channel/ryanodine receptor 2 (RyR2), and mutations in CaM cause arrhythmias such as ca

54 biased toward the mitochondria-SR interface (RyR2), and this bias was promoted by Ca(2+) signaling ac

55 DM stabilized channel open states of RyR1, RyR2, and cortical preparations expressing all three iso

56 cytoplasmic region of S6 and the U motif of RyR2 are important for stabilizing the closed state of t

57 osphorylation on type II ryanodine receptor (RyR2) arrangement and function were examined using corre

58 understanding of CaM-dependent regulation of RyR2 as well as the mechanistic effects of arrhythmogeni

59 mary calmodulin-binding domain (CaMBD2) from RyR2 at 1.84-2.13 angstrom resolutions.

60 do-phosphorylation of the ryanodine receptor RyR2 at Ser2814 (S2814D(+/+) mice) exhibit a higher open

61 ease channels [cardiac ryanodine receptor 2 (RyR2)] at doses threefold lower than its current therape

62 SR) Ca(2+)-release channel in the heart, how RYR2 becomes dysfunctional in HF and AF, and its potenti

63 he PP1-regulatory subunit PPP1R3A as a novel RyR2-binding partner, and coimmunoprecipitation confirme

64 y bind to and functionally modulate RyR1 and RyR2, but this does not involve direct competition at th

65 Our results demonstrate that inactivation of RyR2 by Ca(2+)-CaM is a major determinant of Ca(2+) alte

66 lease both are increased, and association of RyR2 by FK506 binding protein 12.6 (FKBP12.6) is decreas

67 udies have suggested that phosphorylation of RyR2 by protein kinase G (PKG) might contribute to the c

68 ned, this indicates that oxidation regulates RyR2 by the same mechanism as phosphorylation, methylxan

69 ctivation of the cardiac ryanodine receptor (RyR2) by elevating cytosolic Ca(2+) is a central step in

70 Thus, these results suggest that neuronal RyR2 Ca(2+) leak due to Calstabin2 deletion contributes

71 ide novel clues on how to suppress excessive RyR2 Ca(2+) release by manipulating the CaM-RyR2 interac

72 Cardiac ryanodine receptor (Ryr2) Ca(2+) release channels and cellular metabolism ar

73 d how CPVT mutations alter protein function, RyR2 calcium release channel regulation, and cellular ca

74 del, the podocyte type 2 ryanodine receptor (RyR2)/calcium release channel on the ER was phosphorylat

75 stinct interaction between CaM-F142L and the RyR2 CaMBD, which may explain the stronger CaM-dependent

76 Ca(2+) leak via ryanodine receptor type 2 (RyR2) can cause potentially fatal arrhythmias in a varie

77 ions in the cardiac Ryanodine Receptor gene (RYR2) cause dominant catecholaminergic polymorphic ventr

78 e found BAP1, NF2, TP53, SETD2, DDX3X, ULK2, RYR2, CFAP45, SETDB1 and DDX51 to be significantly mutat

79 ation induces Ca(2+) imbalance by depressing RyR2 channel activity during excitation-contraction coup

80 is a novel PP1-regulatory subunit within the RyR2 channel complex.

81 Hence, RyR2 channel inhibition likely constitutes the principal

82 his study, the large K(+) conductance of the RyR2 channel permits direct observation of blocking even

83 laboratory, known as rycals, which stabilize RYR2 channels and prevent Ca(2+) leak from the SR, are u

84 henytoin produced a reversible inhibition of RyR2 channels from sheep and human failing hearts.

85 t phenytoin may selectively target defective RyR2 channels in humans and pointing to phenytoin as a m

86 t phenytoin may selectively target defective RyR2 channels in humans.

87 Although flecainide inhibits single RyR2 channels in vitro, reports have claimed that RyR2 i

88 n reduces flecainide's inhibitory potency on RyR2 channels incorporated into artificial lipid bilayer

89 [Ca(2+)], was duplicated by exposing native RyR2 channels to subphysiologic (</=1.0 microM) luminal

90 tabilization of the binding of calstabin2 to RyR2 channels, which prevents Ca(2+) leakage, or blockin

91 ling, and altered Ca(2+) signaling via leaky RyR2 channels.

92 olic and luminal Ca(2+) activation of single RyR2 channels.

93 ytosolic Ca2+ signaling despite decreases in RyR2 cluster density and RyR2 protein expression.

94 We conclude that both RyR2 cluster size and the arrangement of tetramers withi

95 t both FKBP12 and 12.6 significantly reduced RyR2 cluster sizes, while phosphorylation, even of immun

96 eal, for the first time, the distribution of RyR2 clusters and its functional correlation in living v

97 with colocalization of highly phosphorylated RyR2 clusters at AT-SR junctions and earlier, more rapid

98 Ca(2+) sparks from RyR2 clusters induced no detectable changes in mitochond

99 k model reveals functional subdomains within RyR2 clusters with distinct sensitivities to Ca2+.

100 There were small regions with dislocated GFP-RyR2 clusters.

101 PH2 clusters with type 2 ryanodine receptor (RyR2) clusters near the cell surface.

102 ulum (SR) that include ryanodine receptor 2 (RyR2) clusters.

103 Accordingly, myospryn, minispryn and RyR2 co-localise at the junctional sarcoplasmic reticulu

104 Lack of PKP2 reduces expression of Ryr2 (coding for Ryanodine Receptor 2), Ank2 (coding for

105 ation, and lowered CSQ2 association with the RyR2 complex by 67%-77%.

106 tions: 1) [ROS] is produced locally near the RyR2 complex during X-ROS signaling and increases by an

107 ssociation of the monomeric protein with the RyR2 complex shifts the increase in RyR2 activity with i

108 nded entirely on the presence of CSQ2 in the RyR2 complex.

109 These results demonstrate that Ryr2 controls mitochondrial Ca(2+) dynamics and plays a

110 articularly, the mutant Q4933A (or Q4863A in RyR2) critical for both the gating and Ryd binding not o

111 tes, such as the cardiac ryanodine receptor (RyR2), critically regulate cardiac contractility.

112 nearly abolished ryanodine receptor type 2 (RyR2)-dependent sarcoplasmic Ca(2+) leak.

113 mice expressing phosphorylation-incompetent RyR2 displayed depressed AM sarcomere shortening and red

114 s RISP-dependent ROS generation and FKBP12.6/RyR2 dissociation, leading to PH.

115 Computational modeling showed that RyR2 dysfunction and increased SR Ca(2+)-uptake are suff

116 The molecular mechanisms leading to RyR2 dysfunction and SR Ca(2+) leak depend on the clinic

117 , have implicated ryanodine receptor type 2 (RyR2) dysfunction and enhanced spontaneous Ca(2+) releas

118 een identified as the genetic cause of CPVT: RYR2 (encoding ryanodine receptor calcium release channe

119 TBX5 showed antagonistic interactions on an Ryr2 enhancer.

120 Depletion of cGMP or deletion of Ryr2 equivalently inhibited unfolded protein response/ER

121 A pathogenic RYR2 exon 3 in-frame deletion was identified in the thir

122 , treatment with cGMP significantly enhanced Ryr2 expression in cultured photoreceptor-derived Weri-R

123 Glycative damage of RyR2, favored by deficient dicarbonyl detoxification cap

124 RISP inhibition, RyR2/FKBP12.6 complex stabilization and Ca(2+) release b

125 ced PH, while S107 (a specific stabilizer of RyR2/FKBP12.6 complex) produces an opposite effect.

126 nels and isolate the effect of flecainide on RyR2, flecainide significantly reduced the frequency of

127 Phenytoin inhibits RyR2 from failing human heart and not from healthy heart

128 Notably, phenytoin inhibits RyR2 from failing human heart but not from healthy heart

129 yn and the major cardiac ryanodine receptor (RyR2) from heart.

130 al ryanodine receptors type I (RyR1) and II (RyR2) from skeletal and cardiac muscle, respectively.

131 mpact on Ca(2+) alternans of altered CaM and RyR2 functions under 9 different experimental conditions

132 M is one of the many competing modulators of RyR2 gating.

133 mics in cardiomyocytes through modulation of RyR2 gating.

134 ycardia and long QT syndrome, especially the RYR2 gene, as well as the minimal yield from other genes

135 ction mutations in the ryanodine receptor-2 (RyR2) gene in both SUDEP and sudden cardiac death cases

136 from the sarcoplasmic reticulum (SR) through RyR2 generates localized elevations of Ca(2+) ("Ca(2+) s

137 ogical glyoxalase-1 inhibition recapitulated RyR2 glycation and defective SR-mitochondria calcium exc

138 RyR2 glycation was associated with more pronounced calci

139 Here, we studied heart-specific, inducible Ryr2 haploinsufficient (cRyr2Delta50) mice with a stable

140 es 1-543) of the cardiac ryanodine receptor (RyR2) harbors a large number of mutations associated wit

141 n recent years, structures for both RyR1 and RyR2 have been solved at near-atomic resolution.

142 the ER Ca(2+) channel ryanodine receptor 2 (RyR2) have been implicated in cone degeneration.

143 sceptibility genes (KCNQ1, KCNH2, SCN5A, and RYR2) have yielded putative pathogenic mutations in </=3

144 heterozygous for the R4496C mutation in the RyR2) heterozygous CPVT mice.

145 ) mice) exhibit a higher open probability of RyR2, higher sarcoplasmic reticulum (SR) Ca(2+) leak in

146 tions in csq-1 (CASQ2 homologue) and unc-68 (RyR2 homologue).

147 igate the therapeutic potential of targeting RyR2 hyperactivity in heart and brain pathologies.

148 Elderly patients also exhibited RyR2 hyperglycation and increased mitochondrial calcium

149 ventricular tachycardia-susceptibility gene (RYR2) identified a putative pathogenic mutation in 11 ca

150 rious modulators, calmodulin (CaM) regulates RyR2 in a Ca(2+)-dependent manner.

151 gh which these changes alter the activity of RyR2 in a cellular setting are poorly understood.

152 al inhibitors suppressed the upregulation of RyR2 in CNG channel deficiency.

153 he effects of the corresponding mutations in RyR2 in experiments.

154 studies identified a role of leaky neuronal RyR2 in posttraumatic stress disorder (PTSD).

155 onal coupling between L-type Ca channels and RyR2 in T3+Dex-treated cells.

156 lity of a Ca2+ spark occurring when a single RyR2 in the cluster opens spontaneously can be predicted

157 rate the regulation of cGMP/PKG signaling on RyR2 in the retina and support the role of RyR2 upregula

158 L1 channels with ryanodine type 2 receptors (RyR2) in bladder SMCs.

159 c ryanodine receptor Ca(2+) release channel (RyR2) in the sarcoplasmic reticulum (SR) membrane and th

160 lcium release channels (ryanodine receptors, RyR2) in the sarcoplasmic reticulum, and the frequency o

161 ion assay identified the ryanodine receptor (RyR2) in the SR as prominent target of glycation in aged

162 review addresses the modulation of RyR1 and RyR2, in addition to the impact of such discoveries on i

163 The resultant RyR2 inactivation diminishes sarcoplasmic reticulum Ca(2

164 However, what inactivates RyR2 and how RyR2 inactivation leads to Ca(2+) alternans are unknown.

165 alternations in diastolic cytosolic Ca(2+), RyR2 inactivation, and sarcoplasmic reticulum Ca(2+) rel

166 n, whereas deletion of the EF-hand domain of RyR2 increased both the activation and termination thres

167 sphorylation, even of immunophilin-saturated RyR2, increased them.

168 e report that phosphorylation of Ser-2808 in RyR2 induced by the muscarinic receptor agonist carbacho

169 rotrophic factor (MANF) can revert defective RyR2-induced ER calcium leak, a bioactivity for this ER

170 urthermore, CaM-F142L enhanced CaM-dependent RyR2 inhibition at the single channel level compared wit

171 which may explain the stronger CaM-dependent RyR2 inhibition by CaM-F142L, despite its reduced Ca(2+)

172 channels in vitro, reports have claimed that RyR2 inhibition by flecainide is not relevant for its me

173 nding correlates with impaired CaM-dependent RyR2 inhibition.

174 and D130G, which all diminish CaM-dependent RyR2 inhibition.

175 malized by the cardiac ryanodine receptor 2 (RyR2) inhibitor, dantrolene, without inhibiting Ca(2+) r

176 Here, we investigated the RyR2 inhibitory action of the CaM p.Phe142Leu mutation (

177 revealed that PLN is present in the PPP1R3A-RyR2 interaction, suggesting the existence of a previous

178 RyR2 Ca(2+) release by manipulating the CaM-RyR2 interaction.

179 en CaM and the CaM-binding domain (CaMBD) of RyR2 into an exothermal one.

180 Myospryn redistributes RyR2 into clusters when co-expressed in heterologous cel

181 Moreover, the IC(50) of phenytoin in RyR2 is at least threefold lower than for other ion chan

182 The shift in CaM-binding sites on RyR2 is controlled by Ca(2+) binding to CaM, rather than

183 tance intracellular calcium (Ca(2+)) channel RyR2 is essential for the coupling of excitation and con

184 al the regulatory mechanism by which porcine RyR2 is modulated by human CaM through the structural de

185 oxidation of the cardiac ryanodine receptor (RyR2) is known to activate and inhibit the channel depen

186 Smooth muscle cell (SMC)-specific RyR2 knockout (KO) or Rieske iron-sulfur protein (RISP)

187 Recently, we demonstrated that total loss of Ryr2 leads to cardiomyocyte contractile dysfunction, arr

188 increased membrane excitability, and induced RyR2 leak.

189 Our findings indicate that partial RYR2 loss is sufficient to cause metabolic abnormalities

190 R3A [PP1 regulatory subunit type 3A]) in the RyR2 macromolecular channel complex that has been previo

191 RyR2 macromolecular complex remodeling, characterized by

192 d reduced posttranslational modifications of RyR2 macromolecular complex.

193 s a subunit of ryanodine receptor subtype 2 (RyR2) macromolecular complex, which is an intracellular

194 ice, suggesting that the reduction of mutant RyR2 may be a novel therapeutic approach for CPVT.

195 ns between CSQ2, triadin, and/or junctin and RyR2 may produce an arrhythmogenic substrate in anthracy

196 requency modulation of ryanodine receptor 2 (RyR2)-mediated Ca2+ oscillations and inositol 1,4,5-trip

197 Flecainide remains an effective inhibitor of RyR2-mediated arrhythmogenic Ca release even when cardia

198 lecainide, but not its analogues, suppressed RyR2-mediated Ca release at clinically relevant concentr

199 ent-(+)-verticilide selectively inhibited RyR2-mediated Ca(2+) leak and exhibited higher potency a

200 late current, but no effect on intracellular RyR2-mediated calcium release.

201 ilide is a potent and selective inhibitor of RyR2-mediated diastolic Ca(2+) leak, making it a molecul

202 ude that phenytoin could effectively inhibit RyR2-mediated release of Ca(2+) in a manner paralleling

203 [ent-(+)-verticilide] significantly reduced RyR2-mediated spontaneous Ca(2+) leak both in cardiomyoc

204 aM-F142L had little to no aberrant effect on RyR2-mediated store overload-induced Ca(2+) release in H

205 A likely pathogenic RYR2 missense variant was identified in the second proba

206 ations increased Ca(2+) release and rendered RyR2 more susceptible to store overload-induced Ca(2+) r

207 -U10, the ratio between wild-type and mutant RYR2 mRNA was doubled (from 1:1 to 2:1) confirming the a

208 c polymorphic ventricular tachycardia-linked RyR2 mutation (A4860G) show a unique and unusual mitocho

209 Here we find that a human leaky RyR2 mutation, R176Q (RQ), alters neurotransmitter relea

210 Inherited RYR2 mutations and/or stress-induced phosphorylation and

211 ctional consequences of these central domain RyR2 mutations are not well understood.

212 vation of RyR2 represents a common defect of RyR2 mutations associated with CPVT and AF, which could

213 n HEK293 cells expressing the central domain RyR2 mutations associated with CPVT and AF.

214 We found that all eight central domain RyR2 mutations enhanced the Ca(2+)-dependent activation

215 d and characterized eight disease-associated RyR2 mutations in the central domain.

216 to premature death in individuals with leaky RYR2 mutations.

217 4201) that contains a number of cardiac RyR (RyR2) mutations associated with catecholaminergic polymo

218 e complexes with type 2 ryanodine receptors (RyR2) on the sarcoplasmic reticulum (SR).

219 to an increase in ryanodine receptor type 2 (RyR2) open probability by direct oxidation of the RyR2 p

220 is consistent with the RyR1 and cardiac RyR (RyR2) open-channel structures reported while this paper

221 erefore, our data suggest that low levels of RyR2 oxidation increase the channel activity by decreasi

222 threshold for SOICR, whereas high levels of RyR2 oxidation irreversibly increase the threshold for S

223 This was not due to RyR2 oxidation, but depended entirely on the presence of

224 lular Ca(2+) leak exhibited increased atrial RyR2 oxidation, mitochondrial dysfunction, reactive oxyg

225 nt of rare predicted deleterious variants in RYR2 (p = 5 x 10(-5)).

226 or beta3-adrenergic receptors or the SERCA2b-RyR2 pathway stimulates UCP1-independent thermogenesis i

227 P3-signaling activation and CaMKII-dependent RyR2/phospholamban hyperphosphorylation in an immortaliz

228 rolonged cardiomyocyte action potentials and RyR2 phosphorylation (CamKII-dependent S2814) in the atr

229 ling and the mediators that regulate cardiac RyR2 phosphorylation critical for cardiovascular functio

230 ase (CaMKII) activity, ryanodine receptor 2 (RyR2) phosphorylation and sarcoplasmic reticulum (SR) Ca

231 NO(2)-OA also significantly reduced RyR2-phosphorylation by inhibition of increased CaMKII a

232 This novel RyR2/PLN/sarco/endoplasmic reticulum calcium ATPase-2a c

233 Clinic (Rochester, MN) and validated in 149 RYR2-positive individuals from Amsterdam University Medi

234 This retrospective study was conducted in 84 RYR2-positive individuals from the Mayo Clinic (Rocheste

235 ntricular tachycardia was determined for all RYR2-positive individuals.

236 open probability by direct oxidation of the RyR2 protein complex.

237 espite decreases in RyR2 cluster density and RyR2 protein expression.

238 Delta50) mice with a stable 50% reduction in Ryr2 protein.

239 marked increase in the highly phosphorylated RyR2-pS2808 cluster fraction, thereby maintaining cytoso

240 to neonatal mice with a known CPVT mutation (RYR2(R176Q/+)) effectively suppressed ventricular arrhyt

241 Using a CPVT mouse (RyR2(R4496C+/Cx40eGFP)), we tested whether PC intracellu

242 raperitoneal injection in neonatal and adult RyR2(R4496C/+) (mice heterozygous for the R4496C mutatio

243 their ability to selectively silence mutant RYR2-R4496C mRNA over the corresponding wild-type allele

244 ability of miRYR2-U10 to selectively inhibit RYR2-R4496C mRNA, whereas protein quantification showed

245 alogous to the established human CPVT mutant RyR2(R4497C), were unable to follow 3.7 Hz pacing, with

246 ions in the EF2 motif, but not EF1 motif, of RyR2 raised the threshold for SOICR termination, whereas

247 the effect of oxidation on a common form of RyR2 regulation; store overload-induced Ca(2+) release (

248 Thus, podocyte RyR2 remodeling contributes to ER stress-induced podocyt

249 RyR2 remodeling in turn enhances betaAPP processing.

250 that altered cytosolic Ca(2+) activation of RyR2 represents a common defect of RyR2 mutations associ

251 zing the ryanodine receptors (RyRs; RyR1 and RyR2, respectively).

252 Each of these effects on CSQ2, and the lost RyR2 response to changes in luminal [Ca(2+)], was duplic

253 Phosphorylation of immunophilin-saturated RyR2 resulted in structural and functional changes large

254 rface likely destabilize the closed state of RyR2, resulting in enhanced basal channel activity and s

255 pporting this notion, we found expression of RYR2 (Ryanodine Receptor 2) and SERCA2 further increased

256 alternations in the inactivation of cardiac RyR2 (ryanodine receptor 2).

257 confocal Ca(2+) imaging in myocytes and HEK-RyR2 (ryanodine receptor isoform 2-expressing human embr

258 r (AAV9) expressing miRYR2-U10 in correcting RyR2 (Ryanodine Receptor type 2 protein) function after

259 a release measured by Ca sparks and promoted RyR2 (ryanodine receptor) structural organization.

260 KII-dependent phosphorylation of the cardiac RyR2 (ryanodine-receptor channel type-2), and RyR2 singl

261 [sarco/endoplasmic reticulum Ca(2+)-ATPase], RyR2 [ryanodine receptor 2], and PLB [phospholamban]) wa

262 ffects of SN were investigated in CPVT mice (RyR2 [ryanodine receptor 2]-R2474S) using adeno-associat

263 herefore, we explored the action of doxOL on RyR2's response to changes in luminal [Ca(2+)] seen duri

264 in kinase A-mediated hyperphosphorylation of RYR2-S2808, PLN-S16, TNI-S23/24, and Cav1.2-S1928, and l

265 rotein kinase II (CaMKII) phosphorylation of RyR2-S2814 residue vs. normoglycaemia.

266 nodine binding and CaMKII phosphorylation of RyR2-S2814 residue vs. normoglycaemia.

267 e to CaMKII-dependent phosphorylation of the RyR2-S2814 site and underscore the benefits of increasin

268 nstitutive pseudo-phosphorylation at Ser2814-RyR2 (S2814D(+/+) ) have increased propensity to arrhyth

269 omyopathy-associated genes (BAG3, DSP, PKP2, RYR2, SCN5A, or TNNI3).

270 atrial natriuretic peptide receptor-cGMP-PKG-RyR2 Ser-2808 signaling and independent of muscarinic-in

271 tantly, a chemical compound, K201, can block RyR2-Ser2808 phosphorylation-mediated ER calcium depleti

272 yR2 (ryanodine-receptor channel type-2), and RyR2 single-channel open-probability were significantly

273 CaMKII phosphorylation of RyR2, SR Ca(2+) leak and mitochondrial membrane depolari

274 f multiple RyRs and InsP3 Rs, with Itpr1 and Ryr2 subtypes displaying the highest expression.

275 pathway, there were 39 genes (i.e. CACNA1C, RyR2) that were associated with LAD, LVA and AF type.

276 chanisms that regulate ryanodine receptor 2 (RYR2), the major sarcoplasmic reticulum (SR) Ca(2+)-rele

277 k investigates the potential contribution of RyR2 to cGMP/PKG signaling-induced ER stress and cone de

278 oplasmic reticulum (SR) ryanodine receptors (RyR2) to the inner mitochondrial membrane (IMM) Ca(2+) u

279 , but native KCNE1 and ryanodine receptor 2 (RYR2) transcripts were unaffected.

280 CaM through the structural determination of RyR2 under eight conditions.

281 Likewise, K201 activated cardiac RyR2 under systolic Ca(2+) conditions ( approximately 5

282 We report here that RyR2 undergoes post-translational modifications (phospho

283 n RyR2 in the retina and support the role of RyR2 upregulation in cGMP/PKG signaling-induced ER stres

284 phenytoin have similar inhibitory effects on RyR2 using a single-channel recording of RyR2 activity i

285 Each RYR2 variant was then readjudicated using a phenotype-en

286 pic strength associated with each individual RYR2 variant.

287 al Genetics guidelines classified 47% of all RYR2 variants as VUS.

288 ackground Many rare, potentially pathogenic, RYR2 variants identified in individuals with clinically

289 Results Overall, 72 distinct RYR2 variants were identified among the 84 Mayo Clinic (

290 asmic region in the function of cardiac RyR (RyR2) via structure-guided site-directed mutagenesis.

291 fication approach could reduce the burden of RYR2 VUS encountered during clinical genetic testing.

292 al Center validation cohort with 10/14 (71%) RYR2 VUS promoted to likely pathogenic and 1/14 (7%) dem

293 versus 3/42 [7%]; P<0.001) with 13/20 (65%) RYR2 VUS promoted to likely pathogenic and 4/20 (20%) de

294 in which the CaMKII phosphorylation site on RyR2 was ablated.

295 eas protein quantification showed that total RyR2 was reduced by 15% in the heart of treated mice.

296 nstrated that the expression and activity of RyR2 were highly regulated by cGMP/PKG signaling.

297 Itpr1 and Ryr2 were the dominant transcripts expressed by ICC.

298 obability of the cardiac ryanodine receptor (RyR2) while having no effect on the regulation of the pl

299 rolonged Ca(2+) transient recovery in intact RyR2 wild type and mutant hearts, whereas CaM (1-4) exer

300 o the anterior wall of the left ventricle of RyR2 wild type or mutant mouse hearts.