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Title | Structural basis for ryanodine receptor type 2 leak in heart failure and arrhythmogenic disorders. |
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Journal, issue, pages | Nat Commun, Vol. 15, Issue 1, Page 8080, Year 2024 |
Publish date | Sep 15, 2024 |
Authors | Marco C Miotto / Steven Reiken / Anetta Wronska / Qi Yuan / Haikel Dridi / Yang Liu / Gunnar Weninger / Carl Tchagou / Andrew R Marks / |
PubMed Abstract | Heart failure, the leading cause of mortality and morbidity in the developed world, is characterized by cardiac ryanodine receptor 2 channels that are hyperphosphorylated, oxidized, and depleted of ...Heart failure, the leading cause of mortality and morbidity in the developed world, is characterized by cardiac ryanodine receptor 2 channels that are hyperphosphorylated, oxidized, and depleted of the stabilizing subunit calstabin-2. This results in a diastolic sarcoplasmic reticulum Ca leak that impairs cardiac contractility and triggers arrhythmias. Genetic mutations in ryanodine receptor 2 can also cause Ca leak, leading to arrhythmias and sudden cardiac death. Here, we solved the cryogenic electron microscopy structures of ryanodine receptor 2 variants linked either to heart failure or inherited sudden cardiac death. All are in the primed state, part way between closed and open. Binding of Rycal drugs to ryanodine receptor 2 channels reverts the primed state back towards the closed state, decreasing Ca leak, improving cardiac function, and preventing arrhythmias. We propose a structural-physiological mechanism whereby the ryanodine receptor 2 channel primed state underlies the arrhythmias in heart failure and arrhythmogenic disorders. |
External links | Nat Commun / PubMed:39278969 / PubMed Central |
Methods | EM (single particle) |
Resolution | 2.79 - 6.01 Å |
Structure data | EMDB-42458, PDB-8uq2: EMDB-42459, PDB-8uq3: EMDB-42460, PDB-8uq4: EMDB-42461, PDB-8uq5: EMDB-42581: Constituent EM map: Focused refinement TaF+TM+CTD of the Structure of human RyR2-S2808D in the subprimed state EMDB-42582: Constituent EM map: Focused refinement Jsol+CSol of the Structure of human RyR2-S2808D in the subprimed state EMDB-42583: Constituent EM map: Focused refinement NTD+SPRY+Calstabin-2 of the Structure of human RyR2-S2808D in the subprimed state EMDB-42584: Constituent EM map: Focused refinement RY3&4 of the Structure of human RyR2-S2808D in the subprimed state EMDB-42585: Constituent EM map: Focused refinement RY1&2 of the Structure of human RyR2-S2808D in the subprimed state EMDB-42586: Constituent EM map: Focused refinement BSol2 of the Structure of human RyR2-S2808D in the subprimed state EMDB-42646: Constituent EM map: Focused refinement BSol2 of the Structure of human RyR2-S2808D in the closed state in the presence of ARM210 EMDB-42703: Raw consensus map of the Structure of PKA phosphorylated human RyR2-R420Q in the closed state in the presence of ARM210 EMDB-42704: Constituent EM map: Focused refinement TaF+TM+CTD of the Structure of PKA phosphorylated human RyR2-R420Q in the closed state in the presence of ARM210 EMDB-42705: Constituent EM map: Focused refinement Jsol+CSol of the Structure of PKA phosphorylated human RyR2-R420Q in the closed state in the presence of ARM210 EMDB-42706: Constituent EM map: Focused refinement NTD+SPRY+Calstabin-2 of the Structure of PKA phosphorylated human RyR2-R420Q in the closed state in the presence of ARM210 EMDB-42707: Constituent EM map: Focused refinement BSol of the Structure of PKA phosphorylated human RyR2-R420Q in the closed state in the presence of ARM210 EMDB-42708: Constituent EM map: Focused refinement RY1&2 of the Structure of PKA phosphorylated human RyR2-R420Q in the closed state in the presence of ARM210 EMDB-42709: Constituent EM map: Focused refinement RY3&4 of the Structure of PKA phosphorylated human RyR2-R420Q in the closed state in the presence of ARM210 EMDB-42710: Constituent EM map: Focused refinement BSol2 of the Structure of PKA phosphorylated human RyR2-R420Q in the closed state in the presence of ARM210 EMDB-42722: Raw consensus map of the Structure of PKA phosphorylated human RyR2-R420W in the closed state in the presence of ARM210 EMDB-42723: Constituent EM map: Focused refinement TaF+TM+CTD of the Structure of PKA phosphorylated human RyR2-R420W in the closed state in the presence of ARM210 EMDB-42724: Constituent EM map: Focused refinement Jsol+CSol of the Structure of PKA phosphorylated human RyR2-R420W in the closed state in the presence of ARM210 EMDB-42725: Constituent EM map: Focused refinement NTD+SPRY+Calstabin-2 of the Structure of PKA phosphorylated human RyR2-R420W in the closed state in the presence of ARM210 EMDB-42726: Constituent EM map: Focused refinement RY1&2 of the Structure of PKA phosphorylated human RyR2-R420W in the closed state in the presence of ARM210 EMDB-42727: Constituent EM map: Focused refinement RY3&4 of the Structure of PKA phosphorylated human RyR2-R420W in the closed state in the presence of ARM210 EMDB-42728: Constituent EM map: Focused refinement BSol2 of the Structure of PKA phosphorylated human RyR2-R420W in the closed state in the presence of ARM210 EMDB-42729: Raw consensus map of the Structure of PKA phosphorylated human RyR2-R420W in the primed state in the presence of calcium EMDB-42730: Constituent EM map: Focused refinement TaF+TM+CTD of the Structure of PKA phosphorylated human RyR2-R420W in the primed state in the presence of calcium EMDB-42731: Constituent EM map: Focused refinement Jsol+CSol of the Structure of PKA phosphorylated human RyR2-R420W in the primed state in the presence of calcium EMDB-42732: Constituent EM map: Focused refinement NTD+SPRY+Calstabin-2 of the Structure of PKA phosphorylated human RyR2-R420W in the primed state in the presence of calcium EMDB-42733: Constituent EM map: Focused refinement RY1&2 of the Structure of PKA phosphorylated human RyR2-R420W in the primed state in the presence of calcium EMDB-42734: Constituent EM map: Focused refinement RY3&4 of the Structure of PKA phosphorylated human RyR2-R420W in the primed state in the presence of calcium EMDB-42735: Constituent EM map: Focused refinement BSol2 of the Structure of PKA phosphorylated human RyR2-R420W in the primed state in the presence of calcium EMDB-42736: Raw consensus map of the Structure of PKA phosphorylated human RyR2-R420W in the open state in the presence of calcium EMDB-42737: Constituent EM map: Focused refinement TaF+TM+CTD of the Structure of PKA phosphorylated human RyR2-R420W in the open state in the presence of calcium EMDB-42738: Constituent EM map: Focused refinement JSol+CSol of the Structure of PKA phosphorylated human RyR2-R420W in the open state in the presence of calcium EMDB-42739: Constituent EM map: Focused refinement NTD+SPRY+Calstabin-2 of the Structure of PKA phosphorylated human RyR2-R420W in the open state in the presence of calcium EMDB-42740: Constituent EM map: Focused refinement RY1&2 of the Structure of PKA phosphorylated human RyR2-R420W in the open state in the presence of calcium EMDB-42741: Constituent EM map: Focused refinement RY3&4 of the Structure of PKA phosphorylated human RyR2-R420W in the open state in the presence of calcium EMDB-42742: Constituent EM map: Focused refinement BSol2 of the Structure of PKA phosphorylated human RyR2-R420W in the open state in the presence of calcium EMDB-42743: Raw consensus map of the Structure of PKA phosphorylated human RyR2-R420W in the primed state in the presence of calcium and calmodulin EMDB-42744: Constituent EM map: Focused refinement TaF+TM+CTD of the Structure of PKA phosphorylated human RyR2-R420W in the primed state in the presence of calcium and calmodulin EMDB-42745: Constituent EM map: Focused refinement JSol+CSol of the Structure of PKA phosphorylated human RyR2-R420W in the primed state in the presence of calcium and calmodulin EMDB-42746: Constituent EM map: Focused refinement NTD+SPRY+Calstabin-2 of the Structure of PKA phosphorylated human RyR2-R420W in the primed state in the presence of calcium and calmodulin EMDB-42747: Constituent EM map: Focused refinement CaM of the Structure of PKA phosphorylated human RyR2-R420W in the primed state in the presence of calcium and calmodulin EMDB-42748: Constituent EM map: Focused refinement RY1&2 of the Structure of PKA phosphorylated human RyR2-R420W in the primed state in the presence of calcium and calmodulin EMDB-42749: Constituent EM map: Focused refinement RY3&4 of the Structure of PKA phosphorylated human RyR2-R420W in the primed state in the presence of calcium and calmodulin EMDB-42750: Constituent EM map: Focused refinement BSol2 of the Structure of PKA phosphorylated human RyR2-R420W in the primed state in the presence of calcium and calmodulin EMDB-42751: Raw consensus map of the Structure of PKA phosphorylated human RyR2-R420W in the open state in the presence of calcium and calmodulin EMDB-42752: Constituent EM map: Focused refinement TaF+TM+CTD of the Structure of PKA phosphorylated human RyR2-R420W in the open state in the presence of calcium and calmodulin EMDB-42753: Constituent EM map: Focused refinement JSol+CSol of the Structure of PKA phosphorylated human RyR2-R420W in the open state in the presence of calcium and calmodulin EMDB-42754: Constituent EM map: Focused refinement NTD+SPRY+Calstabin-2 of the Structure of PKA phosphorylated human RyR2-R420W in the open state in the presence of calcium and calmodulin EMDB-42755: Constituent EM map: Focused refinement CaM of the Structure of PKA phosphorylated human RyR2-R420W in the open state in the presence of calcium and calmodulin EMDB-42756: Constituent EM map: Focused refinement RY1&2 of the Structure of PKA phosphorylated human RyR2-R420W in the open state in the presence of calcium and calmodulin EMDB-42757: Constituent EM map: Focused refinement RY3&4 of the Structure of PKA phosphorylated human RyR2-R420W in the open state in the presence of calcium and calmodulin EMDB-42758: Constituent EM map: Focused refinement BSol2 of the Structure of PKA phosphorylated human RyR2-R420W in the open state in the presence of calcium and calmodulin EMDB-42759, PDB-8uxc: EMDB-42761, PDB-8uxe: EMDB-42762, PDB-8uxf: EMDB-42763, PDB-8uxg: EMDB-42764, PDB-8uxh: EMDB-42765, PDB-8uxi: EMDB-42768, PDB-8uxl: EMDB-42769, PDB-8uxm: |
Chemicals | ChemComp-ZN: ChemComp-ATP: ChemComp-KVR: ChemComp-CA: |
Source |
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Keywords | MEMBRANE PROTEIN / calcium channel / TRANSPORT PROTEIN |