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- EMDB-39009: positive allosteric modulator(BMS986187)-bound delta-opioid recep... -

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Entry
Database: EMDB / ID: EMD-39009
Titlepositive allosteric modulator(BMS986187)-bound delta-opioid receptor-Gi complex
Map data
Sample
  • Complex: positive allosteric modulator(BMS986187)-bound delta-opioid receptor-G complex
    • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1
    • 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
    • Protein or peptide: scFv16
    • Protein or peptide: Delta-type opioid receptor
  • Ligand: 3,3,6,6-tetramethyl-9-[4-[(2-methylphenyl)methoxy]phenyl]-4,5,7,9-tetrahydro-2~{H}-xanthene-1,8-dione
  • Ligand: 4-[(~{S})-[(2~{R},5~{S})-2,5-dimethyl-4-prop-2-enyl-piperazin-1-yl]-(3-methoxyphenyl)methyl]-~{N},~{N}-diethyl-benzamide
Keywordspositive allosteric modulator / BMS986187 / delta-opioid receptor / allosteric agonism / allosteric opioid analgesics / MEMBRANE PROTEIN
Function / homology
Function and homology information


G protein-coupled enkephalin receptor activity / spine apparatus / G protein-coupled opioid receptor activity / G protein-coupled opioid receptor signaling pathway / receptor serine/threonine kinase binding / cellular response to toxic substance / G-protein activation / Activation of the phototransduction cascade / Glucagon-type ligand receptors / Thromboxane signalling through TP receptor ...G protein-coupled enkephalin receptor activity / spine apparatus / G protein-coupled opioid receptor activity / G protein-coupled opioid receptor signaling pathway / receptor serine/threonine kinase binding / cellular response to toxic substance / G-protein activation / Activation of the phototransduction cascade / Glucagon-type ligand receptors / Thromboxane signalling through TP receptor / Sensory perception of sweet, bitter, and umami (glutamate) taste / G beta:gamma signalling through PI3Kgamma / G beta:gamma signalling through CDC42 / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Ca2+ pathway / G alpha (z) signalling events / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / neuropeptide binding / Adrenaline,noradrenaline inhibits insulin secretion / ADP signalling through P2Y purinoceptor 12 / G alpha (q) signalling events / G alpha (i) signalling events / Thrombin signalling through proteinase activated receptors (PARs) / Activation of G protein gated Potassium channels / G-protein activation / G beta:gamma signalling through PI3Kgamma / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through PLC beta / ADP signalling through P2Y purinoceptor 1 / Thromboxane signalling through TP receptor / Presynaptic function of Kainate receptors / G beta:gamma signalling through CDC42 / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G alpha (12/13) signalling events / Glucagon-type ligand receptors / G beta:gamma signalling through BTK / eating behavior / ADP signalling through P2Y purinoceptor 12 / Adrenaline,noradrenaline inhibits insulin secretion / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / Ca2+ pathway / G alpha (z) signalling events / Thrombin signalling through proteinase activated receptors (PARs) / Extra-nuclear estrogen signaling / G alpha (s) signalling events / photoreceptor outer segment membrane / G alpha (q) signalling events / spectrin binding / G alpha (i) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / Vasopressin regulates renal water homeostasis via Aquaporins / alkylglycerophosphoethanolamine phosphodiesterase activity / regulation of calcium ion transport / photoreceptor outer segment / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / neuronal dense core vesicle / negative regulation of protein-containing complex assembly / adenylate cyclase inhibitor activity / positive regulation of protein localization to cell cortex / T cell migration / positive regulation of relaxation of smooth muscle / Adenylate cyclase inhibitory pathway / cardiac muscle cell apoptotic process / response to prostaglandin E / D2 dopamine receptor binding / photoreceptor inner segment / G protein-coupled serotonin receptor binding / adenylate cyclase-inhibiting serotonin receptor signaling pathway / dendrite membrane / axon terminus / cellular response to forskolin / chemokine-mediated signaling pathway / Peptide ligand-binding receptors / regulation of mitotic spindle organization / regulation of mitochondrial membrane potential / adult locomotory behavior / response to nicotine / neuropeptide signaling pathway / Regulation of insulin secretion / positive regulation of cholesterol biosynthetic process / negative regulation of insulin secretion / G protein-coupled receptor binding / postsynaptic density membrane / response to peptide hormone / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / cellular response to growth factor stimulus / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / centriolar satellite / G-protein beta/gamma-subunit complex binding / ADP signalling through P2Y purinoceptor 12 / GDP binding / Adrenaline,noradrenaline inhibits insulin secretion / G alpha (z) signalling events / sperm principal piece / ADORA2B mediated anti-inflammatory cytokines production
Similarity search - Function
Delta opioid receptor / Opioid receptor / G-protein alpha subunit, group I / Serpentine type 7TM GPCR chemoreceptor Srsx / 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 / G-protein, gamma subunit ...Delta opioid receptor / Opioid receptor / G-protein alpha subunit, group I / Serpentine type 7TM GPCR chemoreceptor Srsx / 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 / 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 / G protein beta WD-40 repeat protein / Guanine nucleotide-binding protein, beta subunit / G-protein, beta subunit / G-protein coupled receptors family 1 signature. / 7 transmembrane receptor (rhodopsin family) / G protein-coupled receptor, rhodopsin-like / GPCR, rhodopsin-like, 7TM / G-protein coupled receptors family 1 profile. / 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. / 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
Delta-type opioid receptor / Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Guanine nucleotide-binding protein G(i) subunit alpha-1 / Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
Similarity search - Component
Biological speciesHomo sapiens (human) / Rattus norvegicus (Norway rat) / Bos taurus (domestic cattle) / synthetic construct (others)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.97 Å
AuthorsLuo P / Xu Y / Wang Y / Zhuang Y / Xu HE
Funding support China, 2 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)32130022 China
National Natural Science Foundation of China (NSFC)82121005 China
CitationJournal: Sci Adv / Year: 2026
Title: Structure-based design of an opioid receptor modulator for enhanced morphine analgesia.
Authors: Yue Wang / Ping Luo / Haiyan Xu / Li Zhan / Kensuke Sakamoto / Mingyu Li / Jing Wang / Xi-Ping Huang / Jianhui Zhou / Tao Liu / Yanrui Suo / Wenjia Fan / Xinheng He / Youwei Xu / Yongjie Cai ...Authors: Yue Wang / Ping Luo / Haiyan Xu / Li Zhan / Kensuke Sakamoto / Mingyu Li / Jing Wang / Xi-Ping Huang / Jianhui Zhou / Tao Liu / Yanrui Suo / Wenjia Fan / Xinheng He / Youwei Xu / Yongjie Cai / Chao Wang / Yuxi Zhao / Antao Dai / Yali Lai / Qingning Yuan / Wen Hu / Kai Wu / Dehua Yang / Xi Cheng / Xiaojie Lu / Brian Krumm / Terry Kenakin / Jian Zhang / Bryan L Roth / Zhaobing Gao / H Eric Xu / Youwen Zhuang /
Abstract: The alarming rates of deaths due to opioid overdose present an urgent need for safer opioid analgesics. Positive allosteric modulators (PAMs) of opioid receptors (ORs) offer a promising approach to ...The alarming rates of deaths due to opioid overdose present an urgent need for safer opioid analgesics. Positive allosteric modulators (PAMs) of opioid receptors (ORs) offer a promising approach to enhance opioid efficacy while reducing risks of overdose. In this study, we unveil the selective mechanism of PAM modulation of the OR family through structure elucidation of the δ-opioid receptor and μ-opioid receptor (μOR) bound to orthosteric agonists and PAMs BMS986187 (BMS187) and BMS986122 (BMS122). In addition, we uncovered an unexpected but conserved allosteric site across the transmembrane helices TM2 to TM4 of ORs, occupied by BMS187 but not BMS122. Leveraging these structural insights, we designed 9-(5-(4-chlorophenyl)furan-2-yl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1-xanthene-1,8(2)-dione (MPAM-15), whose αβ cooperativity factor is 33-fold higher than BMS122 and threefold higher than BMS187, indicating markedly stronger positive allosterism. Animal studies demonstrate that MPAM-15 shows excellent brain penetration and enhances morphine-induced antinociception without exacerbating respiratory depression or constipation. Molecular dynamics simulations revealed that MPAM-15 promotes and stabilizes the conformational equilibrium of μOR toward the canonical active state, providing a mechanistic basis for its enhanced allosteric potency. These discoveries substantially advance our understanding of OR allosteric mechanism and pave the way for the structure-based development of allosteric opioid analgesics.
History
DepositionFeb 3, 2024-
Header (metadata) releaseJan 7, 2026-
Map releaseJan 7, 2026-
UpdateMar 11, 2026-
Current statusMar 11, 2026Processing site: PDBc / Status: Released

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Structure visualization

Supplemental images

emd_39009.png

Downloads & links

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Map

FileDownload / File: emd_39009.map.gz / Format: CCP4 / Size: 103 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.)
0.82 Å/pix.
x 300 pix.
= 247.2 Å		0.82 Å/pix.
x 300 pix.
= 247.2 Å		0.82 Å/pix.
x 300 pix.
= 247.2 Å

Surface

Projections

Slices (1/3)

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Images are generated by Spider.

Voxel sizeX=Y=Z: 0.824 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0055
Minimum - Maximum-0.013806239 - 0.030951327
Average (Standard dev.)0.00006262745 (±0.0006615098)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions300300300
Spacing300300300
CellA=B=C: 247.2 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_39009_half_map_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

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Half map: #1

Fileemd_39009_half_map_2.map
Projections & Slices
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Sample components

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Entire : positive allosteric modulator(BMS986187)-bound delta-opioid recep...

EntireName: positive allosteric modulator(BMS986187)-bound delta-opioid receptor-G complex
Components
  • Complex: positive allosteric modulator(BMS986187)-bound delta-opioid receptor-G complex
    • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1
    • 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
    • Protein or peptide: scFv16
    • Protein or peptide: Delta-type opioid receptor
  • Ligand: 3,3,6,6-tetramethyl-9-[4-[(2-methylphenyl)methoxy]phenyl]-4,5,7,9-tetrahydro-2~{H}-xanthene-1,8-dione
  • Ligand: 4-[(~{S})-[(2~{R},5~{S})-2,5-dimethyl-4-prop-2-enyl-piperazin-1-yl]-(3-methoxyphenyl)methyl]-~{N},~{N}-diethyl-benzamide

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Supramolecule #1: positive allosteric modulator(BMS986187)-bound delta-opioid recep...

SupramoleculeName: positive allosteric modulator(BMS986187)-bound delta-opioid receptor-G complex
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Guanine nucleotide-binding protein G(i) subunit alpha-1

MacromoleculeName: Guanine nucleotide-binding protein G(i) subunit alpha-1
type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 40.445059 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKSTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI ...String:
MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKSTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI PTQQDVLRTR VKTTGIVETH FTFKDLHFKM FDVGAQRSER KKWIHCFEGV TAIIFCVALS DYDLVLAEDE EM NRMHESM KLFDSICNNK WFTDTSIILF LNKKDLFEEK IKKSPLTICY PEYAGSNTYE EAAAYIQCQF EDLNKRKDTK EIY THFTCS TDTKNVQFVF DAVTDVIIKN NLKDCGLF

UniProtKB: Guanine nucleotide-binding protein G(i) subunit alpha-1

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Macromolecule #2: 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: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Rattus norvegicus (Norway rat)
Molecular weightTheoretical: 40.226992 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MGSLLQSELD QLRQEAEQLK NQIRDARKAC ADATLSQITN NIDPVGRIQM RTRRTLRGHL AKIYAMHWGT DSRLLVSASQ DGKLIIWDS YTTNKVHAIP LRSSWVMTCA YAPSGNYVAC GGLDNICSIY NLKTREGNVR VSRELAGHTG YLSCCRFLDD N QIVTSSGD ...String:
MGSLLQSELD QLRQEAEQLK NQIRDARKAC ADATLSQITN NIDPVGRIQM RTRRTLRGHL AKIYAMHWGT DSRLLVSASQ DGKLIIWDS YTTNKVHAIP LRSSWVMTCA YAPSGNYVAC GGLDNICSIY NLKTREGNVR VSRELAGHTG YLSCCRFLDD N QIVTSSGD TTCALWDIET GQQTTTFTGH TGDVMSLSLA PDTRLFVSGA CDASAKLWDV REGMCRQTFT GHESDINAIC FF PNGNAFA TGSDDATCRL FDLRADQELM TYSHDNIICG ITSVSFSKSG RLLLAGYDDF NCNVWDALKA DRAGVLAGHD NRV SCLGVT DDGMAVATGS WDSFLKIWNG SSGGGGSGGG GSSGVSGWRL FKKIS

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

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Macromolecule #3: 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: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Bos taurus (domestic cattle)
Molecular weightTheoretical: 7.56375 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString:
MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFC

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

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Macromolecule #4: scFv16

MacromoleculeName: scFv16 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 26.408492 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MVQLVESGGG LVQPGGSRKL SCSASGFAFS SFGMHWVRQA PEKGLEWVAY ISSGSGTIYY ADTVKGRFTI SRDDPKNTLF LQMTSLRSE DTAMYYCVRS IYYYGSSPFD FWGQGTTLTV SAGGGGSGGG GSGGGGSADI VMTQATSSVP VTPGESVSIS C RSSKSLLH ...String:
MVQLVESGGG LVQPGGSRKL SCSASGFAFS SFGMHWVRQA PEKGLEWVAY ISSGSGTIYY ADTVKGRFTI SRDDPKNTLF LQMTSLRSE DTAMYYCVRS IYYYGSSPFD FWGQGTTLTV SAGGGGSGGG GSGGGGSADI VMTQATSSVP VTPGESVSIS C RSSKSLLH SNGNTYLYWF LQRPGQSPQL LIYRMSNLAS GVPDRFSGSG SGTAFTLTIS RLEAEDVGVY YCMQHLEYPL TF GAGTKLE L

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Macromolecule #5: Delta-type opioid receptor

MacromoleculeName: Delta-type opioid receptor / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 57.48498 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: EPAPSAGAEL QPPLFANASD AYPSACPSAG ANASGPPGAR SASSLALAIA ITALYSAVCA VGLLGNVLVM FGIVRYTKMK TATNIYIFN LALADALATS TLPFQSAKYL METWPFGELL CKAVLSIDYY NMFTSIFTLT MMSVDRYIAV CHPVKALDFR T PAKAKLIN ...String:
EPAPSAGAEL QPPLFANASD AYPSACPSAG ANASGPPGAR SASSLALAIA ITALYSAVCA VGLLGNVLVM FGIVRYTKMK TATNIYIFN LALADALATS TLPFQSAKYL METWPFGELL CKAVLSIDYY NMFTSIFTLT MMSVDRYIAV CHPVKALDFR T PAKAKLIN ICIWVLASGV GVPIMVMAVT RPRDGAVVCM LQFPSPSWYW DTVTKICVFL FAFVVPILII TVCYGLMLLR LR SVRLLSG SKEKDRSLRR ITRMVLVVVG AFVVCWAPIH IFVIVWTLVD IDRRDPLVVA ALHLCIALGY ANSSLNPVLY AFL DENFKR CFRQLCRKPC GRPDPSSFSR AREATARERV TACTPSDGPV FTLEDFVGDW EQTAAYNLDQ VLEQGGVSSL LQNL AVSVT PIQRIVRSGE NALKIDIHVI IPYEGLSADQ MAQIEEVFKV VYPVDDHHFK VILPYGTLVI DGVTPNMLNY FGRPY EGIA VFDGKKITVT GTLWNGNKII DERLITPDGS MLFRVTINS

UniProtKB: Delta-type opioid receptor

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Macromolecule #6: 3,3,6,6-tetramethyl-9-[4-[(2-methylphenyl)methoxy]phenyl]-4,5,7,9...

MacromoleculeName: 3,3,6,6-tetramethyl-9-[4-[(2-methylphenyl)methoxy]phenyl]-4,5,7,9-tetrahydro-2~{H}-xanthene-1,8-dione
type: ligand / ID: 6 / Number of copies: 1 / Formula: A1D6B
Molecular weightTheoretical: 470.599 Da

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Macromolecule #7: 4-[(~{S})-[(2~{R},5~{S})-2,5-dimethyl-4-prop-2-enyl-piperazin-1-y...

MacromoleculeName: 4-[(~{S})-[(2~{R},5~{S})-2,5-dimethyl-4-prop-2-enyl-piperazin-1-yl]-(3-methoxyphenyl)methyl]-~{N},~{N}-diethyl-benzamide
type: ligand / ID: 7 / Number of copies: 1 / Formula: A1D6F
Molecular weightTheoretical: 449.628 Da

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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: 7.2
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 (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: 2.0 µm / Nominal defocus min: 1.0 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: OTHER
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.97 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION / Number images used: 280347
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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