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- EMDB-20304: E. coli 50S ribosome bound to VM2 -

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Open data


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Basic information

Entry
Database: EMDB / ID: EMD-20304
TitleE. coli 50S ribosome bound to VM2
Map data
Sample
  • Complex: 50S E. coli ribosome
    • RNA: 23S ribosomal RNA
    • RNA: 5S ribosomal RNA
    • Protein or peptide: 50S ribosomal protein L2
    • Protein or peptide: 50S ribosomal protein L15
    • Protein or peptide: 50S ribosomal protein L4
    • Protein or peptide: 50S ribosomal protein L3
    • Protein or peptide: 50S ribosomal protein L13
  • Ligand: (3R,4R,5E,10E,12E,14S,26aR)-14-hydroxy-4,12-dimethyl-3-(propan-2-yl)-8,9,14,15,24,25,26,26a-octahydro-1H,3H,22H-21,18-(azeno)pyrrolo[2,1-c][1,8,4,19]dioxadiazacyclotetracosine-1,7,16,22(4H,17H)-tetrone
Function / homology
Function and homology information


transcriptional attenuation / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / negative regulation of cytoplasmic translation / DnaA-L2 complex / translation repressor activity / negative regulation of DNA-templated DNA replication initiation / ribosome assembly / DNA-templated transcription termination / mRNA 5'-UTR binding ...transcriptional attenuation / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / negative regulation of cytoplasmic translation / DnaA-L2 complex / translation repressor activity / negative regulation of DNA-templated DNA replication initiation / ribosome assembly / DNA-templated transcription termination / mRNA 5'-UTR binding / large ribosomal subunit / large ribosomal subunit rRNA binding / transferase activity / ribosomal large subunit assembly / cytoplasmic translation / cytosolic large ribosomal subunit / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / translation / response to antibiotic / negative regulation of DNA-templated transcription / mRNA binding / DNA binding / RNA binding / zinc ion binding / cytosol / cytoplasm
Similarity search - Function
Ribosomal protein L2, bacterial/organellar-type / Ribosomal protein L13, bacterial-type / Ribosomal protein L3, bacterial/organelle-type / Ribosomal protein L15, bacterial-type / 50S ribosomal protein uL4 / Ribosomal protein L2 signature. / Ribosomal protein L15, conserved site / Ribosomal protein L15 signature. / Ribosomal protein L2, conserved site / Ribosomal protein L13 signature. ...Ribosomal protein L2, bacterial/organellar-type / Ribosomal protein L13, bacterial-type / Ribosomal protein L3, bacterial/organelle-type / Ribosomal protein L15, bacterial-type / 50S ribosomal protein uL4 / Ribosomal protein L2 signature. / Ribosomal protein L15, conserved site / Ribosomal protein L15 signature. / Ribosomal protein L2, conserved site / Ribosomal protein L13 signature. / Ribosomal protein L2, domain 3 / Ribosomal protein L13, conserved site / Ribosomal Proteins L2, C-terminal domain / Ribosomal protein L2, C-terminal / Ribosomal Proteins L2, C-terminal domain / Ribosomal Proteins L2, RNA binding domain / Ribosomal Proteins L2, RNA binding domain / Ribosomal Proteins L2, RNA binding domain / Ribosomal protein L2 / Ribosomal protein L13 / Ribosomal protein L13 / Ribosomal protein L13 superfamily / Ribosomal protein L15 / Ribosomal proteins 50S-L15, 50S-L18e, 60S-L27A / Ribosomal protein L3, conserved site / Ribosomal protein L18e/L15P / Ribosomal L18e/L15P superfamily / Ribosomal protein L3 signature. / Ribosomal protein L3 / Ribosomal protein L3 / Ribosomal protein L4/L1e / Ribosomal protein L4 domain superfamily / Ribosomal protein L4/L1 family / Translation protein SH3-like domain superfamily / Translation protein, beta-barrel domain superfamily / Ribosomal protein L2, domain 2 / Nucleic acid-binding, OB-fold
Similarity search - Domain/homology
Large ribosomal subunit protein uL15 / 50S ribosomal protein L4 / 50S ribosomal protein L13 / Large ribosomal subunit protein uL15 / Large ribosomal subunit protein uL13 / Large ribosomal subunit protein uL2 / Large ribosomal subunit protein uL3 / Large ribosomal subunit protein uL4
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.6 Å
AuthorsPellegrino J / Lee DJ / Fraser JS / Seiple IB
Funding support United States, 2 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM123159 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM124149 United States
CitationJournal: Nature / Year: 2020
Title: Synthetic group A streptogramin antibiotics that overcome Vat resistance.
Authors: Qi Li / Jenna Pellegrino / D John Lee / Arthur A Tran / Hector A Chaires / Ruoxi Wang / Jesslyn E Park / Kaijie Ji / David Chow / Na Zhang / Axel F Brilot / Justin T Biel / Gydo van Zundert ...Authors: Qi Li / Jenna Pellegrino / D John Lee / Arthur A Tran / Hector A Chaires / Ruoxi Wang / Jesslyn E Park / Kaijie Ji / David Chow / Na Zhang / Axel F Brilot / Justin T Biel / Gydo van Zundert / Kenneth Borrelli / Dean Shinabarger / Cindy Wolfe / Beverly Murray / Matthew P Jacobson / Estelle Mühle / Olivier Chesneau / James S Fraser / Ian B Seiple /
Abstract: Natural products serve as chemical blueprints for most antibiotics in clinical use. The evolutionary process by which these molecules arise is inherently accompanied by the co-evolution of resistance ...Natural products serve as chemical blueprints for most antibiotics in clinical use. The evolutionary process by which these molecules arise is inherently accompanied by the co-evolution of resistance mechanisms that shorten the clinical lifetime of any given class of antibiotics. Virginiamycin acetyltransferase (Vat) enzymes are resistance proteins that provide protection against streptogramins, potent antibiotics against Gram-positive bacteria that inhibit the bacterial ribosome. Owing to the challenge of selectively modifying the chemically complex, 23-membered macrocyclic scaffold of group A streptogramins, analogues that overcome the resistance conferred by Vat enzymes have not been previously developed. Here we report the design, synthesis, and antibacterial evaluation of group A streptogramin antibiotics with extensive structural variability. Using cryo-electron microscopy and forcefield-based refinement, we characterize the binding of eight analogues to the bacterial ribosome at high resolution, revealing binding interactions that extend into the peptidyl tRNA-binding site and towards synergistic binders that occupy the nascent peptide exit tunnel. One of these analogues has excellent activity against several streptogramin-resistant strains of Staphylococcus aureus, exhibits decreased rates of acetylation in vitro, and is effective at lowering bacterial load in a mouse model of infection. Our results demonstrate that the combination of rational design and modular chemical synthesis can revitalize classes of antibiotics that are limited by naturally arising resistance mechanisms.
History
DepositionJun 18, 2019-
Header (metadata) releaseJun 17, 2020-
Map releaseJun 17, 2020-
UpdateOct 7, 2020-
Current statusOct 7, 2020Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 6
  • Imaged by UCSF Chimera
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  • Surface view colored by height
  • Surface level: 6
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6pcq
  • Surface level: 6
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_20304.png

Downloads & links

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Map

FileDownload / File: emd_20304.map.gz / Format: CCP4 / Size: 824 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.83 Å/pix.
x 600 pix.
= 496.98 Å		0.83 Å/pix.
x 600 pix.
= 496.98 Å		0.83 Å/pix.
x 600 pix.
= 496.98 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.8283 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 6 / Movie #1: 6
Minimum - Maximum-16.909828 - 32.042587
Average (Standard dev.)-0.018037282 (±1.2677827)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions600600600
Spacing600600600
CellA=B=C: 496.98 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.82830.82830.8283
M x/y/z600600600
origin x/y/z0.0000.0000.000
length x/y/z496.980496.980496.980
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS600600600
D min/max/mean-16.91032.043-0.018

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Supplemental data

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Sample components

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Entire : 50S E. coli ribosome

EntireName: 50S E. coli ribosome
Components
  • Complex: 50S E. coli ribosome
    • RNA: 23S ribosomal RNA
    • RNA: 5S ribosomal RNA
    • Protein or peptide: 50S ribosomal protein L2
    • Protein or peptide: 50S ribosomal protein L15
    • Protein or peptide: 50S ribosomal protein L4
    • Protein or peptide: 50S ribosomal protein L3
    • Protein or peptide: 50S ribosomal protein L13
  • Ligand: (3R,4R,5E,10E,12E,14S,26aR)-14-hydroxy-4,12-dimethyl-3-(propan-2-yl)-8,9,14,15,24,25,26,26a-octahydro-1H,3H,22H-21,18-(azeno)pyrrolo[2,1-c][1,8,4,19]dioxadiazacyclotetracosine-1,7,16,22(4H,17H)-tetrone

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Supramolecule #1: 50S E. coli ribosome

SupramoleculeName: 50S E. coli ribosome / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#7
Source (natural)Organism: Escherichia coli (E. coli)

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Macromolecule #1: 23S ribosomal RNA

MacromoleculeName: 23S ribosomal RNA / type: rna / ID: 1 / Number of copies: 1
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 941.795562 KDa
SequenceString: GGUUAAGCGA CUAAGCGUAC ACGGUGGAUG CCCUGGCAGU CAGAGGCGAU GAAGGACGUG CUAAUCUGCG AUAAGCGUCG GUAAGGUGA UAUGAACCGU UAUAACCGGC GAUUUCCGAA UGGGGAAACC CAGUGUGUUU CGACACACUA UCAUUAACUG A AUCCAUAG ...String:
GGUUAAGCGA CUAAGCGUAC ACGGUGGAUG CCCUGGCAGU CAGAGGCGAU GAAGGACGUG CUAAUCUGCG AUAAGCGUCG GUAAGGUGA UAUGAACCGU UAUAACCGGC GAUUUCCGAA UGGGGAAACC CAGUGUGUUU CGACACACUA UCAUUAACUG A AUCCAUAG GUUAAUGAGG CGAACCGGGG GAACUGAAAC AUCUAAGUAC CCCGAGGAAA AGAAAUCAAC CGAGAUUCCC CC AGUAGCG GCGAGCGAAC GGGGAGCAGC CCAGAGCCUG AAUCAGUGUG UGUGUUAGUG GAAGCGUCUG GAAAGGCGCG CGA UACAGG GUGACAGCCC CGUACACAAA AAUGCACAUG CUGUGAGCUC GAUGAGUAGG GCGGGACACG UGGUAUCCUG UCUG AAUAU GGGGGGACCA UCCUCCAAGG CUAAAUACUC CUGACUGACC GAUAGUGAAC CAGUACCGUG AGGGAAAGGC GAAAA GAAC CCCGGCGAGG GGAGUGAAAA AGAACCUGAA ACCGUGUACG UACAAGCAGU GGGAGCACGC UUAGGCGUGU GACUGC GUA CCUUUUGUAU AAUGGGUCAG CGACUUAUAU UCUGUAGCAA GGUUAACCGA AUAGGGGAGC CGAAGGGAAA CCGAGUC UU AACUGGGCGU UAAGUUGCAG GGUAUAGACC CGAAACCCGG UGAUCUAGCC AUGGGCAGGU UGAAGGUUGG GUAACACU A ACUGGAGGAC CGAACCGACU AAU(1MG)(PSU)(5MU)GAAA AAUUAGCGGA UGACUUGUGG CUGGGGGUGA AAGGCCA AU CAAACCGGGA GAUAGCUGGU UCUCCCCGAA AGCUAUUUAG GUAGCGCCUC GUGAAUUCAU CUCCGGGGGU AGAGCACU G UUUCGGCAAG GGGGUCAUCC CGACUUACCA ACCCGAUGCA AACUGCGAAU ACCGGAGAAU GUUAUCACGG GAGACACAC GGCGGG(PSU)GCU AACGUCCGUC GUGAAGAGGG AAACAACCCA GACCGCCAGC UAAGGUCCCA AAGUCAUGGU UAAGUG GGA AACGAUGUGG GAAGGCCCAG ACAGCCAGGA UGUUGGCUUA GAAGCAGCCA UCAUUUAAAG AAAGCGUAAU AGCUCAC UG GUCGAGUCGG CCUGCGCGGA AGAUGUAACG GGGCUAAACC AUGCACCGAA GCUGCGGCAG CGACGCUUAU GCGUUGUU G GGUAGGGGAG CGUUCUGUAA GCCUGCGAAG GUGUGCUGUG AGGCAUGCUG GAGGUAUCAG AAGUGCGAAU GCUGACAUA AGUAACGAUA AAGCGGGUGA AAAGCCCGCU CGCCGGAAGA CCAAGGGUUC CUGUCCAACG UUAAUCGGGG CAGGGUGAGU CGACCCCUA AGGCGAGGCC GAAAGGCGUA GUCGAUGGGA AACAGGUUAA UAUUCCUGUA CUUGGUGUUA CUGCGAAGGG G GGACGGAG AAGGCUAUGU UGGCCGGGCG ACGGUUGUCC CGGUUUAAGC GUGUAGGCUG GUUUUCCAGG CAAAUCCGGA AA AUCAAGG CUGAGGCGUG AUGACGAGGC ACUACGGUGC UGAAGCAACA AAUGCCCUGC UUCCAGGAAA AGCCUCUAAG CAU CAGGUA ACAUCAAAUC GUACCCCAAA CCGACAC(6MZ)GG UGGUCAGGUA GAGAAUACCA AGGCGCUUGA GAGAACUCGG GUGAAGGAA CUAGGCAAAA UGGUGCCGUA ACUUCGGGAG AAGGCACGCU GAUAUGUAGG UGAGGUCCCU CGCGGAUGGA G CUGAAAUC AGUCGAAGAU ACCAGCUGGC UGCAACUGUU UAUUAAAAAC ACAGCACUGU GCAAACACGA AAGUGGACGU AU ACGGUGU GACGCCU(2MG)CC CGGUGCCGGA AGGUUAAUUG AUGGGGUUAG CGCAAGCGAA GCUCUUGAUC GAAGCCCCG GUAAACGGCG GCCG(PSU)AAC(3TD)A (PSU)AACGGUCCU AAGGUAGCGA AA(5MU)UCCUUGU CGGGUAAGUU CCGA C(5MC)UGC ACGAAUGGCG UAAUGAUGGC CAGGCUGUCU CCACCCGAGA CUCAGUGAAA UUGAACUCGC UGUGAAGAUG C AGUGUACC CGCGGCAAGA CGGAAAGACC CCGU(G7M)AACCU UUACUAUAGC UUGACACUGA ACAUUGAGCC UUGAUGUG U AGGAUAGGUG GGAGGCUUUG AAGUGUGGAC GCCAGUCUGC AUGGAGCCGA CCUUGAAAUA CCACCCUUUA AUGUUUGAU GUUCUAACGU UGACCCGUAA UCCGGGUUGC GGACAGUGUC UGGUGGGUAG UUUGACUG(OMG)G GCGGUCUCCU CCUAAA GAG UAACGGAGGA GCACGAAGGU UGGCUAAUCC UGGUCGGACA UCAGGAGGUU AGUGCAAUGG CAUAAGCCAG CUUGACU GC GAGCGUGACG GCGCGAGCAG GUGCGAAAGC AGGUCAUAGU GAUCCGGUGG UUCUGAAUGG AAGGGCCAUC GCUCAACG G AUAAAAGGUA CUCCG(2MG)GGAU AACAGGC(PSU)GA UACCGCCCAA GAGUUCAUAU CGACGGCGGU GUUUGGCA (OMC) CUCG(2MA)(PSU)GUCG GCUCAUCACA UCCUGGGGCU GAAGUAGGUC CCAAGGGUAU GGC(OMU)GUUCGC CAU UUAAAG UGGUACGCGA GC(PSU)GGGUUUA GAACGUCGUG AGACAGU(PSU)CG GUCCCUAUCU GCCGUGGGCG CUGGAG AAC UGAGGGGGGC UGCUCCUAGU ACGAGAGGAC CGGAGUGGAC GCAUCACUGG UGUUCGGGUU GUCAUGCCAA UGGCACU GC CCGGUAGCUA AAUGCGGAAG AGAUAAGUGC UGAAAGCAUC UAAGCACGAA ACUUGCCCCG AGAUGAGUUC UCCCUGAC C CUUUAAGGGU CCUGAAGGAA CGUUGAAGAC GACGACGUUG AUAGGCCGGG UGUGUAAGCG CAGCGAUGCG UUGAGCUAA CCGGUACUAA UGAACCGUGA GGCUUAACCU U

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Macromolecule #2: 5S ribosomal RNA

MacromoleculeName: 5S ribosomal RNA / type: rna / ID: 2 / Number of copies: 1
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 38.177762 KDa
SequenceString:
GCCUGGCGGC CGUAGCGCGG UGGUCCCACC UGACCCCAUG CCGAACUCAG AAGUGAAACG CCGUAGCGCC GAUGGUAGUG UGGGGUCUC CCCAUGCGAG AGUAGGGAAC UGCCAGGCA

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Macromolecule #3: 50S ribosomal protein L2

MacromoleculeName: 50S ribosomal protein L2 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 29.663244 KDa
SequenceString: AVVKCKPTSP GRRHVVKVVN PELHKGKPFA PLLEKNSKSG GRNNNGRITT RHIGGGHKQA YRIVDFKRNK DGIPAVVERL EYDPNRSAN IALVLYKDGE RRYILAPKGL KAGDQIQSGV DAAIKPGNTL PMRNIPVGST VHNVEMKPGK GGQLARSAGT Y VQIVARDG ...String:
AVVKCKPTSP GRRHVVKVVN PELHKGKPFA PLLEKNSKSG GRNNNGRITT RHIGGGHKQA YRIVDFKRNK DGIPAVVERL EYDPNRSAN IALVLYKDGE RRYILAPKGL KAGDQIQSGV DAAIKPGNTL PMRNIPVGST VHNVEMKPGK GGQLARSAGT Y VQIVARDG AYVTLRLRSG EMRKVEADCR ATLGEVGNAE HMLRVLGKAG AARWRGVRPT VRGTAMNPVD HPHGGGEGRN FG KHPVTPW GVQTKGKKTR SNKRTDKFIV RRRS

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Macromolecule #4: 50S ribosomal protein L15

MacromoleculeName: 50S ribosomal protein L15 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 15.008471 KDa
SequenceString:
MRLNTLSPAE GSKKAGKRLG RGIGSGLGKT GGRGHKGQKS RSGGGVRRGF EGGQMPLYRR LPKFGFTSRK AAITAEIRLS DLAKVEGGV VDLNTLKAAN IIGIQIEFAK VILAGEVTTP VTVRGLRVTK GARAAIEAAG GKIEE

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Macromolecule #5: 50S ribosomal protein L4

MacromoleculeName: 50S ribosomal protein L4 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 22.121566 KDa
SequenceString: MELVLKDAQS ALTVSETTFG RDFNEALVHQ VVVAYAAGAR QGTRAQKTRA EVTGSGKKPW RQKGTGRARS GSIKSPIWRS GGVTFAARP QDHSQKVNKK MYRGALKSIL SELVRQDRLI VVEKFSVEAP KTKLLAQKLK DMALEDVLII TGELDENLFL A ARNLHKVD ...String:
MELVLKDAQS ALTVSETTFG RDFNEALVHQ VVVAYAAGAR QGTRAQKTRA EVTGSGKKPW RQKGTGRARS GSIKSPIWRS GGVTFAARP QDHSQKVNKK MYRGALKSIL SELVRQDRLI VVEKFSVEAP KTKLLAQKLK DMALEDVLII TGELDENLFL A ARNLHKVD VRDATGIDPV SLIAFDKVVM TADAVKQVEE MLA

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Macromolecule #6: 50S ribosomal protein L3

MacromoleculeName: 50S ribosomal protein L3 / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 22.277535 KDa
SequenceString: MIGLVGKKVG MTRIFTEDGV SIPVTVIEVE ANRVTQVKDL ANDGYRAIQV TTGAKKANRV TKPEAGHFAK AGVEAGRGLW EFRLAEGEE FTVGQSISVE LFADVKKVDV TGTSKGKGFA GTVKRWNFRT QDATHGNSLS HRVPGSIGQN QTPGKVFKGK K MAGQMGNE ...String:
MIGLVGKKVG MTRIFTEDGV SIPVTVIEVE ANRVTQVKDL ANDGYRAIQV TTGAKKANRV TKPEAGHFAK AGVEAGRGLW EFRLAEGEE FTVGQSISVE LFADVKKVDV TGTSKGKGFA GTVKRWNFRT QDATHGNSLS HRVPGSIGQN QTPGKVFKGK K MAGQMGNE RVTVQSLDVV RVDAERNLLL VKGAVPGATG SDLIVKPAVK A

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Macromolecule #7: 50S ribosomal protein L13

MacromoleculeName: 50S ribosomal protein L13 / type: protein_or_peptide / ID: 7 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 16.050606 KDa
SequenceString:
MKTFTAKPET VKRDWYVVDA TGKTLGRLAT ELARRLRGKH KAEYTPHVDT GDYIIVLNAD KVAVTGNKRT DKVYYHHTGH IGGIKQATF EEMIARRPER VIEIAVKGML PKGPLGRAMF RKLKVYAGNE HNHAAQQPQV LDI

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Macromolecule #8: (3R,4R,5E,10E,12E,14S,26aR)-14-hydroxy-4,12-dimethyl-3-(propan-2-...

MacromoleculeName: (3R,4R,5E,10E,12E,14S,26aR)-14-hydroxy-4,12-dimethyl-3-(propan-2-yl)-8,9,14,15,24,25,26,26a-octahydro-1H,3H,22H-21,18-(azeno)pyrrolo[2,1-c][1,8,4,19]dioxadiazacyclotetracosine-1,7,16,22(4H,17H)-tetrone
type: ligand / ID: 8 / Number of copies: 1 / Formula: O8J
Molecular weightTheoretical: 527.609 Da
Chemical component information

ChemComp-O8J:
(3R,4R,5E,10E,12E,14S,26aR)-14-hydroxy-4,12-dimethyl-3-(propan-2-yl)-8,9,14,15,24,25,26,26a-octahydro-1H,3H,22H-21,18-(azeno)pyrrolo[2,1-c][1,8,4,19]dioxadiazacyclotetracosine-1,7,16,22(4H,17H)-tetrone

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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 K2 SUMMIT (4k x 4k) / Average electron dose: 71.2 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 2.6 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 31630
Initial angle assignmentType: PROJECTION MATCHING
Final angle assignmentType: PROJECTION MATCHING

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