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- EMDB-40916: Cryo-EM structure of cinacalcet-bound human calcium-sensing recep... -

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Entry
Database: EMDB / ID: EMD-40916
TitleCryo-EM structure of cinacalcet-bound human calcium-sensing receptor CaSR-Gi complex in lipid nanodiscs
Map data
Sample
  • Complex: Cinacalcet-bound human calcium-sensing receptor CaSR-Gi complex in lipid nanodiscs
    • Protein or peptide: x 4 types
  • Ligand: x 9 types
KeywordsFamily C GPCR / Calcium-sensing Receptor (CaSR) / Heterotrimeric G protein / Cryo-EM / Lipid Nanodiscs / Positive Allosteric Modulator / Membrane Protein / SIGNALING PROTEIN
Function / homology
Function and homology information


bile acid secretion / regulation of presynaptic membrane potential / chemosensory behavior / response to fibroblast growth factor / cellular response to peptide / cellular response to vitamin D / phosphatidylinositol phospholipase C activity / negative regulation of adenylate cyclase activity / Class C/3 (Metabotropic glutamate/pheromone receptors) / calcium ion import ...bile acid secretion / regulation of presynaptic membrane potential / chemosensory behavior / response to fibroblast growth factor / cellular response to peptide / cellular response to vitamin D / phosphatidylinositol phospholipase C activity / negative regulation of adenylate cyclase activity / Class C/3 (Metabotropic glutamate/pheromone receptors) / calcium ion import / GTP metabolic process / positive regulation of positive chemotaxis / fat pad development / amino acid binding / cellular response to hepatocyte growth factor stimulus / branching morphogenesis of an epithelial tube / G protein-coupled dopamine receptor signaling pathway / positive regulation of calcium ion import / regulation of calcium ion transport / positive regulation of macroautophagy / cellular response to low-density lipoprotein particle stimulus / detection of calcium ion / anatomical structure morphogenesis / Adenylate cyclase inhibitory pathway / positive regulation of vasoconstriction / JNK cascade / axon terminus / chloride transmembrane transport / ossification / response to ischemia / cellular response to glucose stimulus / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / G protein-coupled receptor binding / G protein-coupled receptor activity / positive regulation of insulin secretion / G-protein beta/gamma-subunit complex binding / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / Olfactory Signaling Pathway / Activation of the phototransduction cascade / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / G protein-coupled acetylcholine receptor signaling pathway / G-protein activation / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Prostacyclin signalling through prostacyclin receptor / Glucagon signaling in metabolic regulation / G beta:gamma signalling through CDC42 / G beta:gamma signalling through BTK / intracellular calcium ion homeostasis / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / ADP signalling through P2Y purinoceptor 12 / vasodilation / Sensory perception of sweet, bitter, and umami (glutamate) taste / photoreceptor disc membrane / Glucagon-type ligand receptors / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / G alpha (z) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / ADORA2B mediated anti-inflammatory cytokines production / cellular response to catecholamine stimulus / ADP signalling through P2Y purinoceptor 1 / G beta:gamma signalling through PI3Kgamma / GDP binding / adenylate cyclase-activating dopamine receptor signaling pathway / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / GPER1 signaling / sensory perception of taste / cellular response to prostaglandin E stimulus / Inactivation, recovery and regulation of the phototransduction cascade / G-protein beta-subunit binding / integrin binding / heterotrimeric G-protein complex / G alpha (12/13) signalling events / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / GTPase binding / presynaptic membrane / retina development in camera-type eye / Ca2+ pathway / midbody / phospholipase C-activating G protein-coupled receptor signaling pathway / fibroblast proliferation / G alpha (i) signalling events / basolateral plasma membrane / G alpha (s) signalling events / cellular response to hypoxia / G alpha (q) signalling events / transmembrane transporter binding / Ras protein signal transduction / cell population proliferation / Extra-nuclear estrogen signaling / positive regulation of ERK1 and ERK2 cascade / apical plasma membrane / G protein-coupled receptor signaling pathway / lysosomal membrane / cell division
Similarity search - Function
GPCR, family 3, extracellular calcium-sensing receptor-related / G-protein coupled receptors family 3 signature 1. / G-protein coupled receptors family 3 signature 2. / GPCR, family 3, nine cysteines domain / GPCR, family 3, nine cysteines domain superfamily / Nine Cysteines Domain of family 3 GPCR / GPCR, family 3, conserved site / G-protein coupled receptors family 3 signature 3. / GPCR, family 3 / G-protein coupled receptors family 3 profile. ...GPCR, family 3, extracellular calcium-sensing receptor-related / G-protein coupled receptors family 3 signature 1. / G-protein coupled receptors family 3 signature 2. / GPCR, family 3, nine cysteines domain / GPCR, family 3, nine cysteines domain superfamily / Nine Cysteines Domain of family 3 GPCR / GPCR, family 3, conserved site / G-protein coupled receptors family 3 signature 3. / GPCR, family 3 / G-protein coupled receptors family 3 profile. / GPCR family 3, C-terminal / 7 transmembrane sweet-taste receptor of 3 GCPR / G-protein alpha subunit, group I / Receptor, ligand binding region / Receptor family ligand binding region / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit / G-alpha domain profile. / G protein alpha subunit / Periplasmic binding protein-like I / G-protein, gamma subunit / G-protein gamma subunit domain profile. / G-protein gamma-like domain / G-protein gamma-like domain superfamily / GGL domain / G protein gamma subunit-like motifs / GGL domain / Guanine nucleotide-binding protein, beta subunit / G-protein, beta subunit / G-protein beta WD-40 repeat / WD40 repeat, conserved site / Trp-Asp (WD) repeats signature. / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD domain, G-beta repeat / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Guanine nucleotide-binding protein G(i) subunit alpha-3 / Extracellular calcium-sensing receptor / Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 / Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.1 Å
AuthorsHe F / Wu C / Gao Y / Skiniotis G
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)5R01DK132902-02 United States
CitationJournal: Nature / Year: 2024
Title: Allosteric modulation and G-protein selectivity of the Ca-sensing receptor.
Authors: Feng He / Cheng-Guo Wu / Yang Gao / Sabrina N Rahman / Magda Zaoralová / Makaía M Papasergi-Scott / Ting-Jia Gu / Michael J Robertson / Alpay B Seven / Lingjun Li / Jesper M Mathiesen / Georgios Skiniotis /
Abstract: The calcium-sensing receptor (CaSR) is a family C G-protein-coupled receptor (GPCR) that has a central role in regulating systemic calcium homeostasis. Here we use cryo-electron microscopy and ...The calcium-sensing receptor (CaSR) is a family C G-protein-coupled receptor (GPCR) that has a central role in regulating systemic calcium homeostasis. Here we use cryo-electron microscopy and functional assays to investigate the activation of human CaSR embedded in lipid nanodiscs and its coupling to functional G versus G proteins in the presence and absence of the calcimimetic drug cinacalcet. High-resolution structures show that both G and G drive additional conformational changes in the activated CaSR dimer to stabilize a more extensive asymmetric interface of the seven-transmembrane domain (7TM) that involves key protein-lipid interactions. Selective G and G coupling by the receptor is achieved through substantial rearrangements of intracellular loop 2 and the C terminus, which contribute differentially towards the binding of the two G-protein subtypes, resulting in distinct CaSR-G-protein interfaces. The structures also reveal that natural polyamines target multiple sites on CaSR to enhance receptor activation by zipping negatively charged regions between two protomers. Furthermore, we find that the amino acid L-tryptophan, a well-known ligand of CaSR extracellular domains, occupies the 7TM bundle of the G-protein-coupled protomer at the same location as cinacalcet and other allosteric modulators. Together, these results provide a framework for G-protein activation and selectivity by CaSR, as well as its allosteric modulation by endogenous and exogenous ligands.
History
DepositionMay 29, 2023-
Header (metadata) releaseFeb 7, 2024-
Map releaseFeb 7, 2024-
UpdateOct 16, 2024-
Current statusOct 16, 2024Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_40916.png

Downloads & links

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Map

FileDownload / File: emd_40916.map.gz / Format: CCP4 / Size: 421.9 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
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AxesZ (Sec.)Y (Row.)X (Col.)
0.87 Å/pix.
x 480 pix.
= 416.496 Å		0.87 Å/pix.
x 480 pix.
= 416.496 Å		0.87 Å/pix.
x 480 pix.
= 416.496 Å

Surface

Projections

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Images are generated by Spider.

Voxel sizeX=Y=Z: 0.8677 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 1.4
Minimum - Maximum-0.45078418 - 11.281774499999999
Average (Standard dev.)0.051090185 (±0.15599437)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions480480480
Spacing480480480
CellA=B=C: 416.496 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: Local unsharpened refinement map of CaSR VFT and CRD domains

Fileemd_40916_additional_1.map
AnnotationLocal unsharpened refinement map of CaSR VFT and CRD domains
Projections & Slices
AxesZYX

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Histogram

Histogram (log scale)

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Additional map: Local unsharpened refinement map of CaSR CRD and 7TM domains

Fileemd_40916_additional_2.map
AnnotationLocal unsharpened refinement map of CaSR CRD and 7TM domains
Projections & Slices
AxesZYX

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Histogram (log scale)

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Additional map: Local unsharpened refinement map of Gi3

Fileemd_40916_additional_3.map
AnnotationLocal unsharpened refinement map of Gi3
Projections & Slices
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Sample components

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Entire : Cinacalcet-bound human calcium-sensing receptor CaSR-Gi complex i...

EntireName: Cinacalcet-bound human calcium-sensing receptor CaSR-Gi complex in lipid nanodiscs
Components
  • Complex: Cinacalcet-bound human calcium-sensing receptor CaSR-Gi complex in lipid nanodiscs
    • Protein or peptide: Extracellular calcium-sensing receptor
    • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-3
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
  • Ligand: N-[(1R)-1-(naphthalen-1-yl)ethyl]-3-[3-(trifluoromethyl)phenyl]propan-1-amine
  • Ligand: 1,2-DIOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: CALCIUM ION
  • Ligand: TRYPTOPHAN
  • Ligand: PHOSPHATE ION
  • Ligand: SPERMINE
  • Ligand: CHOLESTEROL
  • Ligand: water

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Supramolecule #1: Cinacalcet-bound human calcium-sensing receptor CaSR-Gi complex i...

SupramoleculeName: Cinacalcet-bound human calcium-sensing receptor CaSR-Gi complex in lipid nanodiscs
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Extracellular calcium-sensing receptor

MacromoleculeName: Extracellular calcium-sensing receptor / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 99.929133 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: DYKDDDDKAA AYGPDQRAQK KGDIILGGLF PIHFGVAAKD QDLKSRPESV ECIRYNFRGF RWLQAMIFAI EEINSSPALL PNLTLGYRI FDTCNTVSKA LEATLSFVAQ NKIDSLNLDE FCNCSEHIPS TIAVVGATGS GVSTAVANLL GLFYIPQVSY A SSSRLLSN ...String:
DYKDDDDKAA AYGPDQRAQK KGDIILGGLF PIHFGVAAKD QDLKSRPESV ECIRYNFRGF RWLQAMIFAI EEINSSPALL PNLTLGYRI FDTCNTVSKA LEATLSFVAQ NKIDSLNLDE FCNCSEHIPS TIAVVGATGS GVSTAVANLL GLFYIPQVSY A SSSRLLSN KNQFKSFLRT IPNDEHQATA MADIIEYFRW NWVGTIAADD DYGRPGIEKF REEAEERDIC IDFSELISQY SD EEEIQHV VEVIQNSTAK VIVVFSSGPD LEPLIKEIVR RNITGKIWLA SEAWASSSLI AMPQYFHVVG GTIGFALKAG QIP GFREFL KKVHPRKSVH NGFAKEFWEE TFNCHLQEGA KGPLPVDTFL RGHEESGDRF SNSSTAFRPL CTGDENISSV ETPY IDYTH LRISYNVYLA VYSIAHALQD IYTCLPGRGL FTNGSCADIK KVEAWQVLKH LRHLNFTNNM GEQVTFDECG DLVGN YSII NWHLSPEDGS IVFKEVGYYN VYAKKGERLF INEEKILWSG FSREVPFSNC SRDCLAGTRK GIIEGEPTCC FECVEC PDG EYSDETDASA CNKCPDDFWS NENHTSCIAK EIEFLSWTEP FGIALTLFAV LGIFLTAFVL GVFIKFRNTP IVKATNR EL SYLLLFSLLC CFSSSLFFIG EPQDWTCRLR QPAFGISFVL CISCILVKTN RVLLVFEAKI PTSFHRKWWG LNLQFLLV F LCTFMQIVIC VIWLYTAPPS SYRNQELEDE IIFITCHEGS LMALGFLIGY TCLLAAICFF FAFKSRKLPE NFNEAKFIT FSMLIFFIVW ISFIPAYAST YGKFVSAVEV IAILAASFGL LACIFFNKIY IILFKPSRNT IEEVRCSTAA HAFKVAARAT LRRSNV

UniProtKB: Extracellular calcium-sensing receptor

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Macromolecule #2: Guanine nucleotide-binding protein G(i) subunit alpha-3

MacromoleculeName: Guanine nucleotide-binding protein G(i) subunit alpha-3
type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 40.585137 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MGCTLSAEDK AAVERSKMID RNLREDGEKA AKEVKLLLLG AGESGKSTIV KQMKIIHEDG YSEDECKQYK VVVYSNTIQS IIAIIRAMG RLKIDFGEAA RADDARQLFV LAGSAEEGVM TPELAGVIKR LWRDGGVQAC FSRSREYQLN DSASYYLNDL D RISQSNYI ...String:
MGCTLSAEDK AAVERSKMID RNLREDGEKA AKEVKLLLLG AGESGKSTIV KQMKIIHEDG YSEDECKQYK VVVYSNTIQS IIAIIRAMG RLKIDFGEAA RADDARQLFV LAGSAEEGVM TPELAGVIKR LWRDGGVQAC FSRSREYQLN DSASYYLNDL D RISQSNYI PTQQDVLRTR VKTTGIVETH FTFKDLYFKM FDVGGQRSER KKWIHCFEGV TAIIFCVALS DYDLVLAEDE EM NRMHESM KLFDSICNNK WFTETSIILF LNKKDLFEEK IKRSPLTICY PEYTGSNTYE EAAAYIQCQF EDLNRRKDTK EIY THFTCA TDTKNVQFVF DAVTDVIIKN NLKECGLY

UniProtKB: Guanine nucleotide-binding protein G(i) subunit alpha-3

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Macromolecule #3: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 37.573988 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: GSSGSELDQL RQEAEQLKNQ IRDARKACAD ATLSQITNNI DPVGRIQMRT RRTLRGHLAK IYAMHWGTDS RLLVSASQDG KLIIWDSYT TNKVHAIPLR SSWVMTCAYA PSGNYVACGG LDNICSIYNL KTREGNVRVS RELAGHTGYL SCCRFLDDNQ I VTSSGDTT ...String:
GSSGSELDQL RQEAEQLKNQ IRDARKACAD ATLSQITNNI DPVGRIQMRT RRTLRGHLAK IYAMHWGTDS RLLVSASQDG KLIIWDSYT TNKVHAIPLR SSWVMTCAYA PSGNYVACGG LDNICSIYNL KTREGNVRVS RELAGHTGYL SCCRFLDDNQ I VTSSGDTT CALWDIETGQ QTTTFTGHTG DVMSLSLAPD TRLFVSGACD ASAKLWDVRE GMCRQTFTGH ESDINAICFF PN GNAFATG SDDATCRLFD LRADQELMTY SHDNIICGIT SVSFSKSGRL LLAGYDDFNC NVWDALKADR AGVLAGHDNR VSC LGVTDD GMAVATGSWD SFLKIWN

UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1

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Macromolecule #4: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 7.861143 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString:
MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L

UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

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Macromolecule #6: N-[(1R)-1-(naphthalen-1-yl)ethyl]-3-[3-(trifluoromethyl)phenyl]pr...

MacromoleculeName: N-[(1R)-1-(naphthalen-1-yl)ethyl]-3-[3-(trifluoromethyl)phenyl]propan-1-amine
type: ligand / ID: 6 / Number of copies: 2 / Formula: YP4
Molecular weightTheoretical: 357.412 Da
Chemical component information

ChemComp-YP4:
N-[(1R)-1-(naphthalen-1-yl)ethyl]-3-[3-(trifluoromethyl)phenyl]propan-1-amine / medication*YM

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Macromolecule #7: 1,2-DIOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE

MacromoleculeName: 1,2-DIOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE / type: ligand / ID: 7 / Number of copies: 2 / Formula: PCW
Molecular weightTheoretical: 787.121 Da
Chemical component information

ChemComp-PCW:
1,2-DIOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE / DOPC, phospholipid*YM

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Macromolecule #8: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 8 / Number of copies: 3 / Formula: NAG
Molecular weightTheoretical: 221.208 Da
Chemical component information

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose

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Macromolecule #9: CALCIUM ION

MacromoleculeName: CALCIUM ION / type: ligand / ID: 9 / Number of copies: 4 / Formula: CA
Molecular weightTheoretical: 40.078 Da

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Macromolecule #10: TRYPTOPHAN

MacromoleculeName: TRYPTOPHAN / type: ligand / ID: 10 / Number of copies: 2 / Formula: TRP
Molecular weightTheoretical: 204.225 Da
Chemical component information

ChemComp-TRP:
TRYPTOPHAN

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Macromolecule #11: PHOSPHATE ION

MacromoleculeName: PHOSPHATE ION / type: ligand / ID: 11 / Number of copies: 2 / Formula: PO4
Molecular weightTheoretical: 94.971 Da
Chemical component information

ChemComp-PO4:
PHOSPHATE ION

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Macromolecule #12: SPERMINE

MacromoleculeName: SPERMINE / type: ligand / ID: 12 / Number of copies: 4 / Formula: SPM
Molecular weightTheoretical: 202.34 Da
Chemical component information

ChemComp-SPM:
SPERMINE

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Macromolecule #13: CHOLESTEROL

MacromoleculeName: CHOLESTEROL / type: ligand / ID: 13 / Number of copies: 1 / Formula: CLR
Molecular weightTheoretical: 386.654 Da
Chemical component information

ChemComp-CLR:
CHOLESTEROL

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Macromolecule #14: water

MacromoleculeName: water / type: ligand / ID: 14 / Number of copies: 1 / Formula: HOH
Molecular weightTheoretical: 18.015 Da
Chemical component information

ChemComp-HOH:
WATER

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.5 µm / Nominal defocus min: 0.5 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: OTHER
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 262847
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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