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- EMDB-62593: A Cryo_EM structure of 5_HT1A complex with 5-Meo-DMT -

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Entry
Database: EMDB / ID: EMD-62593
TitleA Cryo_EM structure of 5_HT1A complex with 5-Meo-DMT
Map data
Sample
  • Complex: 5-HT1A complex with 5-MEO-DMT
    • 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: SCFV16
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Protein or peptide: 5-hydroxytryptamine receptor 1A
  • Ligand: 2-(5-methoxy-1H-indol-3-yl)-N,N-dimethylethan-1-amine
  • Ligand: GLYCOCHENODEOXYCHOLIC ACID
  • Ligand: CHOLESTEROL HEMISUCCINATE
  • Ligand: [(2R)-1-[oxidanyl-[(2R,3R,5S,6R)-2,3,5,6-tetrakis(oxidanyl)-4-phosphonooxy-cyclohexyl]oxy-phosphoryl]oxy-3-tetradecanoyloxy-propan-2-yl] (5E,8E)-hexadeca-5,8,11,14-tetraenoate
  • Ligand: water
KeywordsGPCR / 5_HT1A / MEMBRANE PROTEIN
Function / homology
Function and homology information


regulation of serotonin secretion / Gi/o-coupled serotonin receptor activity / regulation of hormone secretion / regulation of behavior / receptor-receptor interaction / serotonin receptor activity / Serotonin receptors / G protein-coupled serotonin receptor activity / serotonin receptor signaling pathway / regulation of dopamine metabolic process ...regulation of serotonin secretion / Gi/o-coupled serotonin receptor activity / regulation of hormone secretion / regulation of behavior / receptor-receptor interaction / serotonin receptor activity / Serotonin receptors / G protein-coupled serotonin receptor activity / serotonin receptor signaling pathway / regulation of dopamine metabolic process / neurotransmitter receptor activity / serotonin metabolic process / serotonin binding / gamma-aminobutyric acid signaling pathway / adult behavior / exploration behavior / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / regulation of vasoconstriction / behavioral fear response / 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 / D2 dopamine receptor binding / adenylate cyclase-inhibiting serotonin receptor signaling pathway / G protein-coupled serotonin receptor binding / cellular response to forskolin / regulation of mitotic spindle organization / chemokine-mediated signaling pathway / Regulation of insulin secretion / neuropeptide signaling pathway / response to prostaglandin E / positive regulation of cholesterol biosynthetic process / negative regulation of insulin secretion / G protein-coupled receptor binding / response to peptide hormone / centriolar satellite / G-protein beta/gamma-subunit complex binding / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / Olfactory Signaling Pathway / Activation of the phototransduction cascade / G protein-coupled acetylcholine receptor signaling pathway / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G-protein activation / Glucagon signaling in metabolic regulation / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through CDC42 / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / G beta:gamma signalling through BTK / photoreceptor disc membrane / ADP signalling through P2Y purinoceptor 12 / Glucagon-type ligand receptors / GDP binding / Sensory perception of sweet, bitter, and umami (glutamate) taste / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / G alpha (z) signalling events / cellular response to catecholamine stimulus / ADP signalling through P2Y purinoceptor 1 / ADORA2B mediated anti-inflammatory cytokines production / G beta:gamma signalling through PI3Kgamma / adenylate cyclase-activating dopamine receptor signaling pathway / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / GPER1 signaling / cellular response to prostaglandin E stimulus / heterotrimeric G-protein complex / G alpha (12/13) signalling events / G-protein beta-subunit binding / Inactivation, recovery and regulation of the phototransduction cascade / extracellular vesicle / sensory perception of taste / sperm principal piece / Thrombin signalling through proteinase activated receptors (PARs) / adenylate cyclase-activating G protein-coupled receptor signaling pathway / signaling receptor complex adaptor activity / retina development in camera-type eye / GTPase binding / fibroblast proliferation / G protein activity / midbody / Ca2+ pathway / cell cortex / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / G alpha (i) signalling events / G alpha (s) signalling events / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (q) signalling events / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / chemical synaptic transmission / Ras protein signal transduction / Extra-nuclear estrogen signaling / cell population proliferation / ciliary basal body
Similarity search - Function
5-Hydroxytryptamine 1A receptor / 5-hydroxytryptamine receptor family / G-protein alpha subunit, group I / Serpentine type 7TM GPCR chemoreceptor Srsx / G protein alpha subunit, helical insertion / G protein alpha subunit / Guanine nucleotide binding protein (G-protein), alpha subunit / G-protein alpha subunit / G-alpha domain profile. / G-protein, gamma subunit ...5-Hydroxytryptamine 1A receptor / 5-hydroxytryptamine receptor family / G-protein alpha subunit, group I / Serpentine type 7TM GPCR chemoreceptor Srsx / G protein alpha subunit, helical insertion / G protein alpha subunit / Guanine nucleotide binding protein (G-protein), alpha subunit / G-protein alpha subunit / G-alpha domain profile. / 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
5-hydroxytryptamine receptor 1A / 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 / Guanine nucleotide-binding protein G(i) subunit alpha-1
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.63 Å
AuthorsYuan Q / Li S
Funding support China, 1 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: Research (Wash D C) / Year: 2025
Title: Structural Pharmacology of Bufotenine Derivatives in Activating the 5-HT Receptor for Therapeutic Potential in Depression and Anxiety.
Authors: Shu-Jie Li / Qing-Ning Yuan / Wen-Yuan Wu / Zhi-Han Chen / Duo Chen / Hong Shan / Qin-Yu Chu / Wen Hu / Kai Wu / Tao Liu / Yu-Yu Zhu / Li Hou / Jing Zhou / Jia Duan / Jin-Ao Duan / H Eric Xu / Hong-Yue Ma /
Abstract: The 5-HT receptor is a critical target in the treatment of depression and anxiety. Bufotenine derivatives, such as 5-methoxy-,-dimethyltryptamine (5-MeO-DMT), 5-hydroxy-,-dimethyltryptamine (5-OH-DMT) ...The 5-HT receptor is a critical target in the treatment of depression and anxiety. Bufotenine derivatives, such as 5-methoxy-,-dimethyltryptamine (5-MeO-DMT), 5-hydroxy-,-dimethyltryptamine (5-OH-DMT), and 5-hydroxy-,,-dimethyltryptamine-derived from traditional Chinese medicine-have shown antidepressant potential. However, the structural basis of their interaction with 5-HT and their pharmacological profiles remain incompletely understood. This study investigated bufotenine derivatives acting on multiple serotonin receptors, highlighting 5-HT as a key mediator of antidepressant effects while recognizing 5-HT as primarily responsible for hallucinogenic outcomes, to identify candidates with therapeutic efficacy but reduced hallucinogenic liability. We determined the cryo-electron microscopy structures of 5-HT bound to selected bufotenine derivatives. Functional assays in mice, including behavioral tests and receptor activation studies, were used to evaluate the antidepressant of each compound. Structural analysis revealed that all bufotenine derivatives engage conserved motifs within the 5-HT binding pocket, with 5-OH-DMT displaying a distinct interaction pattern. Behavioral assays showed that 5-OH-DMT and 5-MeO-DMT retained strong antidepressant and anxiolytic effects. These pharmacological differences correlate with their unique receptor binding conformation. This study delineated the structural pharmacology of bufotenine derivatives at the 5-HT receptor, identifying 5-OH-DMT and 5-MeO-DMT as promising antidepressant and anxiolytic candidates. The findings establish a molecular framework for the development of next-generation nonhallucinogenic therapeutics aimed at 5-HT.
History
DepositionDec 5, 2024-
Header (metadata) releaseDec 3, 2025-
Map releaseDec 3, 2025-
UpdateJun 17, 2026-
Current statusJun 17, 2026Processing site: PDBc / Status: Released

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Structure visualization

Supplemental images

emd_62593.png

Downloads & links

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Map

FileDownload / File: emd_62593.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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Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.73 Å/pix.
x 300 pix.
= 219. Å		0.73 Å/pix.
x 300 pix.
= 219. Å		0.73 Å/pix.
x 300 pix.
= 219. Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 0.73 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.189
Minimum - Maximum-2.1199272 - 2.599184
Average (Standard dev.)-0.00000959637 (±0.06063614)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions300300300
Spacing300300300
CellA=B=C: 219.0 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #1

Fileemd_62593_half_map_1.map
Projections & Slices
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Half map: #2

Fileemd_62593_half_map_2.map
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Sample components

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Entire : 5-HT1A complex with 5-MEO-DMT

EntireName: 5-HT1A complex with 5-MEO-DMT
Components
  • Complex: 5-HT1A complex with 5-MEO-DMT
    • 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: SCFV16
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Protein or peptide: 5-hydroxytryptamine receptor 1A
  • Ligand: 2-(5-methoxy-1H-indol-3-yl)-N,N-dimethylethan-1-amine
  • Ligand: GLYCOCHENODEOXYCHOLIC ACID
  • Ligand: CHOLESTEROL HEMISUCCINATE
  • Ligand: [(2R)-1-[oxidanyl-[(2R,3R,5S,6R)-2,3,5,6-tetrakis(oxidanyl)-4-phosphonooxy-cyclohexyl]oxy-phosphoryl]oxy-3-tetradecanoyloxy-propan-2-yl] (5E,8E)-hexadeca-5,8,11,14-tetraenoate
  • Ligand: water

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Supramolecule #1: 5-HT1A complex with 5-MEO-DMT

SupramoleculeName: 5-HT1A complex with 5-MEO-DMT / 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
EC number: Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 40.356016 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKNTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI ...String:
MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKNTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI PTQQDVLRTR VKTTGIVETH FTFKDLHFKM FDVGAQRSER KKWIHCFEGV TAIIFCVALS DYDLVLADEA EM NRMHASM 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: Homo sapiens (human)
Molecular weightTheoretical: 37.784301 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: GSLLQSELDQ LRQEAEQLKN QIRDARKACA DATLSQITNN IDPVGRIQMR TRRTLRGHLA KIYAMHWGTD SRLLVSASQD GKLIIWDSY TTNKVHAIPL RSSWVMTCAY APSGNYVACG GLDNICSIYN LKTREGNVRV SRELAGHTGY LSCCRFLDDN Q IVTSSGDT ...String:
GSLLQSELDQ LRQEAEQLKN QIRDARKACA DATLSQITNN IDPVGRIQMR TRRTLRGHLA KIYAMHWGTD SRLLVSASQD GKLIIWDSY TTNKVHAIPL RSSWVMTCAY APSGNYVACG GLDNICSIYN LKTREGNVRV SRELAGHTGY LSCCRFLDDN Q IVTSSGDT TCALWDIETG QQTTTFTGHT GDVMSLSLAP DTRLFVSGAC DASAKLWDVR EGMCRQTFTG HESDINAICF FP NGNAFAT GSDDATCRLF DLRADQELMT YSHDNIICGI TSVSFSKSGR LLLAGYDDFN CNVWDALKAD RAGVLAGHDN RVS CLGVTD DGMAVATGSW DSFLKIWN

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

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Macromolecule #3: SCFV16

MacromoleculeName: SCFV16 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 26.277299 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: VQLVESGGGL VQPGGSRKLS CSASGFAFSS FGMHWVRQAP EKGLEWVAYI SSGSGTIYYA DTVKGRFTIS RDDPKNTLFL QMTSLRSED TAMYYCVRSI YYYGSSPFDF WGQGTTLTVS AGGGGSGGGG SGGGGSADIV MTQATSSVPV TPGESVSISC R SSKSLLHS ...String:
VQLVESGGGL VQPGGSRKLS CSASGFAFSS FGMHWVRQAP EKGLEWVAYI SSGSGTIYYA DTVKGRFTIS RDDPKNTLFL QMTSLRSED TAMYYCVRSI YYYGSSPFDF WGQGTTLTVS AGGGGSGGGG SGGGGSADIV MTQATSSVPV TPGESVSISC R SSKSLLHS NGNTYLYWFL QRPGQSPQLL IYRMSNLASG VPDRFSGSGS GTAFTLTISR LEAEDVGVYY CMQHLEYPLT FG AGTKLEL

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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 #5: 5-hydroxytryptamine receptor 1A

MacromoleculeName: 5-hydroxytryptamine receptor 1A / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 43.859285 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: TTGISDVTVS YQVITSLLLG TLIFCAVLGN ACVVAAIALE RSLQNVANYL IGSLAVTDLM VSVLVLPMAA LYQVLNKWTL GQVTCDLFI ALDVLCCTSS IWHLCAIALD RYWAITDPID YVNKRTPRRA AALISLTWLI GFLISIPPML GWRTPEDRSD P DACTISKD ...String:
TTGISDVTVS YQVITSLLLG TLIFCAVLGN ACVVAAIALE RSLQNVANYL IGSLAVTDLM VSVLVLPMAA LYQVLNKWTL GQVTCDLFI ALDVLCCTSS IWHLCAIALD RYWAITDPID YVNKRTPRRA AALISLTWLI GFLISIPPML GWRTPEDRSD P DACTISKD HGYTIYSTFG AFYIPLLLML VLYGRIFRAA RFRIRKTVKK VEKTGADTRH GASPAPQPKK SVNGESGSRN WR LGVESKA GGALCANGAV RQGDDGAALE VIEVHRVGNS KEHLPLPSEA GPTPCAPASF ERKNERNAEA KRKMALARER KTV KTLGII MGTFILCWLP FFIVALVLPF CESSCHMPTL LGAIINWLGY SNSLLNPVIY AYFNKDFQNA FKKIIKCKFC RQ

UniProtKB: 5-hydroxytryptamine receptor 1A

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Macromolecule #6: 2-(5-methoxy-1H-indol-3-yl)-N,N-dimethylethan-1-amine

MacromoleculeName: 2-(5-methoxy-1H-indol-3-yl)-N,N-dimethylethan-1-amine / type: ligand / ID: 6 / Number of copies: 1 / Formula: YFW
Molecular weightTheoretical: 218.295 Da

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Macromolecule #7: GLYCOCHENODEOXYCHOLIC ACID

MacromoleculeName: GLYCOCHENODEOXYCHOLIC ACID / type: ligand / ID: 7 / Number of copies: 1 / Formula: CHO
Molecular weightTheoretical: 449.623 Da
Chemical component information

ChemComp-CHO:
GLYCOCHENODEOXYCHOLIC ACID / detergent*YM

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Macromolecule #8: CHOLESTEROL HEMISUCCINATE

MacromoleculeName: CHOLESTEROL HEMISUCCINATE / type: ligand / ID: 8 / Number of copies: 1 / Formula: Y01
Molecular weightTheoretical: 486.726 Da
Chemical component information

ChemComp-Y01:
CHOLESTEROL HEMISUCCINATE

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Macromolecule #9: [(2R)-1-[oxidanyl-[(2R,3R,5S,6R)-2,3,5,6-tetrakis(oxidanyl)-4-pho...

MacromoleculeName: [(2R)-1-[oxidanyl-[(2R,3R,5S,6R)-2,3,5,6-tetrakis(oxidanyl)-4-phosphonooxy-cyclohexyl]oxy-phosphoryl]oxy-3-tetradecanoyloxy-propan-2-yl] (5E,8E)-hexadeca-5,8,11,14-tetraenoate
type: ligand / ID: 9 / Number of copies: 1 / Formula: J40
Molecular weightTheoretical: 854.895 Da
Chemical component information

ChemComp-J40:
[(2R)-1-[oxidanyl-[(2R,3R,5S,6R)-2,3,5,6-tetrakis(oxidanyl)-4-phosphonooxy-cyclohexyl]oxy-phosphoryl]oxy-3-tetradecanoyloxy-propan-2-yl] (5E,8E)-hexadeca-5,8,11,14-tetraenoate

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Macromolecule #10: water

MacromoleculeName: water / type: ligand / ID: 10 / Number of copies: 6 / 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: 7.04
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: FEI FALCON III (4k 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: 18.0 µm / Nominal defocus min: 8.0 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: INSILICO MODEL
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.63 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 180294
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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