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Structure paper

TitleStructural mechanisms of TRPM7 activation and inhibition.
Journal, issue, pagesNat Commun, Vol. 14, Issue 1, Page 2639, Year 2023
Publish dateMay 8, 2023
AuthorsKirill D Nadezhdin / Leonor Correia / Chamali Narangoda / Dhilon S Patel / Arthur Neuberger / Thomas Gudermann / Maria G Kurnikova / Vladimir Chubanov / Alexander I Sobolevsky /
PubMed AbstractThe transient receptor potential channel TRPM7 is a master regulator of the organismal balance of divalent cations that plays an essential role in embryonic development, immune responses, cell ...The transient receptor potential channel TRPM7 is a master regulator of the organismal balance of divalent cations that plays an essential role in embryonic development, immune responses, cell mobility, proliferation, and differentiation. TRPM7 is implicated in neuronal and cardiovascular disorders, tumor progression and has emerged as a new drug target. Here we use cryo-EM, functional analysis, and molecular dynamics simulations to uncover two distinct structural mechanisms of TRPM7 activation by a gain-of-function mutation and by the agonist naltriben, which show different conformational dynamics and domain involvement. We identify a binding site for highly potent and selective inhibitors and show that they act by stabilizing the TRPM7 closed state. The discovered structural mechanisms provide foundations for understanding the molecular basis of TRPM7 channelopathies and drug development.
External linksNat Commun / PubMed:37156763 / PubMed Central
MethodsEM (single particle)
Resolution2.17 - 2.99 Å
Structure data

EMDB-40496, PDB-8si2:
Cryo-EM structure of TRPM7 in MSP2N2 nanodisc in apo state
Method: EM (single particle) / Resolution: 2.19 Å

EMDB-40497, PDB-8si3:
Cryo-EM structure of TRPM7 in GDN detergent in apo state
Method: EM (single particle) / Resolution: 2.61 Å

EMDB-40498, PDB-8si4:
Cryo-EM structure of TRPM7 N1098Q mutant in GDN detergent in open state
Method: EM (single particle) / Resolution: 2.46 Å

EMDB-40499, PDB-8si5:
Cryo-EM structure of TRPM7 in MSP2N2 nanodisc in complex with agonist naltriben in open state
Method: EM (single particle) / Resolution: 2.17 Å

EMDB-40500, PDB-8si6:
Cryo-EM structure of TRPM7 in MSP2N2 nanodisc in complex with agonist naltriben in closed state
Method: EM (single particle) / Resolution: 2.44 Å

EMDB-40501, PDB-8si7:
Cryo-EM structure of TRPM7 in GDN detergent in complex with inhibitor VER155008 in closed state
Method: EM (single particle) / Resolution: 2.59 Å

EMDB-40502, PDB-8si8:
Cryo-EM structure of TRPM7 N1098Q mutant in GDN detergent in complex with inhibitor VER155008 in closed state
Method: EM (single particle) / Resolution: 2.99 Å

EMDB-40504, PDB-8sia:
Cryo-EM structure of TRPM7 N1098Q mutant in GDN detergent in complex with inhibitor NS8593 in closed state
Method: EM (single particle) / Resolution: 2.91 Å

EMDB-40505, PDB-8sib:
Cryo-EM structure of TRPM7 MHR1-3 domain
Method: EM (single particle) / Resolution: 2.62 Å

Chemicals

ChemComp-POV:
(2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate / phospholipid*YM / POPC

ChemComp-CLR:
CHOLESTEROL / Cholesterol

ChemComp-DU0:
2-[2-[(1~{S},2~{S},4~{S},5'~{R},6~{R},7~{S},8~{R},9~{S},12~{S},13~{R},16~{S})-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.0^{2,9}.0^{4,8}.0^{13,18}]icos-18-ene-6,2'-oxane]-16-yl]oxyethyl]propane-1,3-diol

ChemComp-NA:
Unknown entry

ChemComp-HOH:
WATER / Water

ChemComp-CA:
Unknown entry

ChemComp-ZY8:
(4bS,8R,8aS,14bR)-7-(cyclopropylmethyl)-5,6,7,8,9,14b-hexahydro-8aH-4,8-methanobis[1]benzofuro[3,2-e:2',3'-g]isoquinoline-1,8a-diol

ChemComp-3FD:
4-[[(2R,3S,4R,5R)-5-[6-amino-8-[(3,4-dichlorophenyl)methylamino]purin-9-yl]-3,4-dihydroxy-oxolan-2-yl]methoxymethyl]benzonitrile

ChemComp-6RA:
N-[(1R)-1,2,3,4-tetrahydronaphthalen-1-yl]-1H-benzimidazol-2-amine

Source
  • mus musculus (house mouse)
KeywordsMEMBRANE PROTEIN / transient receptor potential M family member 7 / TRP / channel / TRPM7 / TRP channels / magnesium channel / N1098Q / open state / agonist / ligand / naltriben / inhibitor / VER155008 / NS8593

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