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- EMDB-59227: Cryo-EM map of SKM-M. smegmatis 70S complex State M1 (P-tRNA, vac... -

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Basic information

Entry
Database: EMDB / ID: EMD-59227
TitleCryo-EM map of SKM-M. smegmatis 70S complex State M1 (P-tRNA, vacant A-site)
Map dataMain, 3D-refined map of State M1
Sample
  • Complex: SKM-M.smegmatis 70S complex
    • RNA: x 1 types
    • Protein or peptide: x 17 types
KeywordsAntibiotics / 70S complex / RIBOSOME
Biological speciesMycolicibacterium smegmatis (bacteria)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.9 Å
AuthorsCook MA / Xu M / Morici M / Travin DT / Wang W / Klepacki D / Nandini N / Rao VN / Sahile H / Hackenberger D ...Cook MA / Xu M / Morici M / Travin DT / Wang W / Klepacki D / Nandini N / Rao VN / Sahile H / Hackenberger D / Golas AJ / Nietupski RM / Fitzgerald M / Safdari HA / Berger M / Corazza M / Bond A / Ben-Zion I / Guitor AK / Tertigas D / Wang L / Schaenzer AJ / Ejim L / Yarlagadda V / Gomez J / Surette MG / Av-Gay Y / Dhar N / Hung DT / Vazquez Laslop N / Mankin A / Wilson DN / Wright GD
Funding support United States, Canada, Germany, 4 items
OrganizationGrant numberCountry
National Institutes of Health/National Cancer Institute (NIH/NCI)R35 GM127134 United States
National Institutes of Health/National Cancer Institute (NIH/NCI)NIH R01 AI162961 United States
Canadian Institutes of Health Research (CIHR)FDN148463 Canada
German Research Foundation (DFG)WI3285/12-1 Germany
CitationJournal: To Be Published
Title: Cryo-EM structure of SKM-M.smegmatis 70S ribosomal complex
Authors: Morici M / Wilson DN
History
DepositionJul 28, 2026-
Header (metadata) releaseAug 26, 2026-
Map releaseAug 26, 2026-
UpdateAug 26, 2026-
Current statusAug 26, 2026Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_59227.png

Downloads & links

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Map

FileDownload / File: emd_59227.map.gz / Format: CCP4 / Size: 307.5 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationMain, 3D-refined map of State M1
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.83 Å/pix.
x 432 pix.
= 359.424 Å		0.83 Å/pix.
x 432 pix.
= 359.424 Å		0.83 Å/pix.
x 432 pix.
= 359.424 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.832 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.00978
Minimum - Maximum-0.0051235366 - 0.034416284
Average (Standard dev.)0.00048503772 (±0.0025316428)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions432432432
Spacing432432432
CellA=B=C: 359.424 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: Post-processed map obtained applying a 70S-mask covering the...

Fileemd_59227_additional_1.map
AnnotationPost-processed map obtained applying a 70S-mask covering the whole particle to the 3D refined map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half-map 1 used to generate the main 3D-refined map

Fileemd_59227_half_map_1.map
AnnotationHalf-map 1 used to generate the main 3D-refined map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half-map 2 used to generate the main 3D-refined map

Fileemd_59227_half_map_2.map
AnnotationHalf-map 2 used to generate the main 3D-refined map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : SKM-M.smegmatis 70S complex

EntireName: SKM-M.smegmatis 70S complex
Components
  • Complex: SKM-M.smegmatis 70S complex
    • RNA: 16S rRNA
    • Protein or peptide: Small ribosomal subunit protein bS22
    • Protein or peptide: Small ribosomal subunit protein uS3
    • Protein or peptide: Small ribosomal subunit protein uS4
    • Protein or peptide: Small ribosomal subunit protein uS5
    • Protein or peptide: Small ribosomal subunit protein bS6
    • Protein or peptide: Small ribosomal subunit protein uS7
    • Protein or peptide: Small ribosomal subunit protein uS8
    • Protein or peptide: Small ribosomal subunit protein uS9
    • Protein or peptide: Small ribosomal subunit protein uS10
    • Protein or peptide: Small ribosomal subunit protein uS11
    • Protein or peptide: Small ribosomal subunit protein uS12
    • Protein or peptide: Small ribosomal subunit protein uS14B
    • Protein or peptide: Small ribosomal subunit protein uS15
    • Protein or peptide: Small ribosomal subunit protein bS16
    • Protein or peptide: Small ribosomal subunit protein uS17
    • Protein or peptide: Small ribosomal subunit protein bS18B
    • Protein or peptide: Small ribosomal subunit protein bS20

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Supramolecule #1: SKM-M.smegmatis 70S complex

SupramoleculeName: SKM-M.smegmatis 70S complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Mycolicibacterium smegmatis (bacteria)
Molecular weightTheoretical: 2.5 MDa

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Macromolecule #1: 16S rRNA

MacromoleculeName: 16S rRNA / type: rna / ID: 1 / Number of copies: 1
Source (natural)Organism: Mycolicibacterium smegmatis (bacteria)
Molecular weightTheoretical: 495.373656 KDa
SequenceString: UUUUUGUUUG GAGAGUUUGA UCCUGGCUCA GGACGAACGC UGGCGGCGUG CUUAACACAU GCAAGUCGAA CGGAAAGGCC CUUUCGGGG GUACUCGAGU GGCGAACGGG UGAGUAACAC GUGGGUGAUC UGCCCUGCAC UUUGGGAUAA GCCUGGGAAA C UGGGUCUA ...String:
UUUUUGUUUG GAGAGUUUGA UCCUGGCUCA GGACGAACGC UGGCGGCGUG CUUAACACAU GCAAGUCGAA CGGAAAGGCC CUUUCGGGG GUACUCGAGU GGCGAACGGG UGAGUAACAC GUGGGUGAUC UGCCCUGCAC UUUGGGAUAA GCCUGGGAAA C UGGGUCUA AUACCGAAUA CACCCUGCUG GUCGCAUGGC CUGGUAGGGG AAAGCUUUUG CGGUGUGGGA UGGGCCCGCG GC CUAUCAG CUUGUUGGUG GGGUGAUGGC CUACCAAGGC GACGACGGGU AGCCGGCCUG AGAGGGUGAC CGGCCACACU GGG ACUGAG AUACGGCCCA GACUCCUACG GGAGGCAGCA GUGGGGAAUA UUGCACAAUG GGCGCAAGCC UGAUGCAGCG ACGC CGCGU GAGGGAUGAC GGCCUUCGGG UUGUAAACCU CUUUCAGCAC AGACGAAGCG CAAGUGACGG UAUGUGCAGA AGAAG GACC GGCCAACUAC GUGCCAGCAG CCGCGGUAAU ACGUAGGGUC CGAGCGUUGU CCGGAAUUAC UGGGCGUAAA GAGCUC GUA GGUGGUUUGU CGCGUUGUUC GUGAAAACUC ACAGCUUAAC UGUGGGCGUG CGGGCGAUAC GGGCAGACUA GAGUACU GC AGGGGAGACU GGAAUUCCUG GUGUAGCGGU GGAAUGCGCA GAUAUCAGGA GGAACACCGG UGGCGAAGGC GGGUCUCU G GGCAGUAACU GACGCUGAGG AGCGAAAGCG UGGGGAGCGA ACAGGAUUAG AUACCCUGGU AGUCCACGCC GUAAACGGU GGGUACUAGG UGUGGGUUUC CUUCCUUGGG AUCCGUGCCG UAGCUAACGC AUUAAGUACC CCGCCUGGGG AGUACGGCCG CAAGGCUAA AACUCAAAGG AAUUGACGGG GGCCCGCACA AGCGGCGGAG CAUGUGGAUU AAUUCGAUGC AACGCGAAGA A CCUUACCU GGGUUUGACA UGCACAGGAC GCCGGCAGAG AUGUCGGUUC CCUUGUGGCC UGUGUGCAGG UGGUGCAUGG CU GUCGUCA GCUCGUGUCG UGAGAUGUUG GGUUAAGUCC CGCAACGAGC GCAACCCUUG UCUCAUGUUG CCAGCACGUU AUG GUGGGG ACUCGUGAGA GACUGCCGGG GUCAACUCGG AGGAAGGUGG GGAUGACGUC AAGUCAUCAU GCCCCUUAUG UCCA GGGCU UCACACAUGC UACAAUGGCC GGUACAAAGG GCUGCGAUGC CGUGAGGUGG AGCGAAUCCU UUCAAAGCCG GUCUC AGUU CGGAUCGGGG UCUGCAACUC GACCCCGUGA AGUCGGAGUC GCUAGUAAUC GCAGAUCAGC AACGCUGCGG UGAAUA CGU UCCCGGGCCU UGUACACACC GCCCGUCACG UCAUGAAAGU CGGUAACACC CGAAGCCGGU GGCCUAACCC UUGUGGA GG GAGCCGUCGA AGGUGGGAUC GGCGAUUGGG ACGAAGUCGU AACAAGGUAG CCGUACCGGA AGGUGCGGCU GGAUCACC U CCUUUCU

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Macromolecule #2: Small ribosomal subunit protein bS22

MacromoleculeName: Small ribosomal subunit protein bS22 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mycolicibacterium smegmatis (bacteria)
Molecular weightTheoretical: 4.1643 KDa
SequenceString:
MGSVIKKRRK RMSKKKHRKL LRRTRVQRRK LGK

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Macromolecule #3: Small ribosomal subunit protein uS3

MacromoleculeName: Small ribosomal subunit protein uS3 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mycolicibacterium smegmatis (bacteria)
Molecular weightTheoretical: 30.191227 KDa
SequenceString: MGQKINPHGF RLGITTEWKS RWYADKQYKD YVKEDVAIRK LLATGLERAG IADVEIERTR DRVRVDIHTA RPGIVIGRRG TEADRIRAD LEKLTGKQVQ LNILEVKNPE SQAQLVAQGV AEQLSNRVAF RRAMRKAIQS AMRQPNVKGI RVQCSGRLGG A EMSRSEFY ...String:
MGQKINPHGF RLGITTEWKS RWYADKQYKD YVKEDVAIRK LLATGLERAG IADVEIERTR DRVRVDIHTA RPGIVIGRRG TEADRIRAD LEKLTGKQVQ LNILEVKNPE SQAQLVAQGV AEQLSNRVAF RRAMRKAIQS AMRQPNVKGI RVQCSGRLGG A EMSRSEFY REGRVPLHTL RADIDYGLYE AKTTFGRIGV KVWIYKGDIV GGKRELAAAA PASDRPRRER PSGTRPRRSG SA GTTATST EAGRAATSDA PAAGTAAAAE APAESTES

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Macromolecule #4: Small ribosomal subunit protein uS4

MacromoleculeName: Small ribosomal subunit protein uS4 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mycolicibacterium smegmatis (bacteria)
Molecular weightTheoretical: 23.415787 KDa
SequenceString: MARYTGPATR KSRRLGVDLV GGDQSFEKRP YPPGQHGRAR IKESEYRQQL QEKQKARFSY GVMEKQFRRY YEEANRQPGK TGDNLLRIL ESRLDNVVYR AGLARTRRMA RQLVSHGHFL VNGVKVDIPS YRVSQYDIID VKEKSLNTLP FQIARETAGE R PIPSWLQV ...String:
MARYTGPATR KSRRLGVDLV GGDQSFEKRP YPPGQHGRAR IKESEYRQQL QEKQKARFSY GVMEKQFRRY YEEANRQPGK TGDNLLRIL ESRLDNVVYR AGLARTRRMA RQLVSHGHFL VNGVKVDIPS YRVSQYDIID VKEKSLNTLP FQIARETAGE R PIPSWLQV VGERQRILVH QLPERAQIDV PLTEQLIVEL YSK

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Macromolecule #5: Small ribosomal subunit protein uS5

MacromoleculeName: Small ribosomal subunit protein uS5 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mycolicibacterium smegmatis (bacteria)
Molecular weightTheoretical: 21.94609 KDa
SequenceString: MAEQAGAGSA QDNRGGRGRR DDRGGRGRDG GDKSNYIERV VSINRVSKVV KGGRRFSFTA LVIVGDGKGM VGVGYGKAKE VPAAIAKGV EEARKNFFRV PLIGSTITHP VQGEAAAGVV MLRPASPGTG VIAGGAARAV LECAGVHDIL AKSLGSDNAI N VVHATVAA ...String:
MAEQAGAGSA QDNRGGRGRR DDRGGRGRDG GDKSNYIERV VSINRVSKVV KGGRRFSFTA LVIVGDGKGM VGVGYGKAKE VPAAIAKGV EEARKNFFRV PLIGSTITHP VQGEAAAGVV MLRPASPGTG VIAGGAARAV LECAGVHDIL AKSLGSDNAI N VVHATVAA LKLLQRPEEV AARRGLPIED VAPAGMLKAR RESEALAAAA AREGSA

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Macromolecule #6: Small ribosomal subunit protein bS6

MacromoleculeName: Small ribosomal subunit protein bS6 / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mycolicibacterium smegmatis (bacteria)
Molecular weightTheoretical: 10.991637 KDa
SequenceString:
MRPYEIMVIL DPTLDERTVA PSLETFLNVI RKDGGTVDKV DIWGRRRLAY EIAKHAEGIY AVIDVKAEPA TVSELDRQLN LNESVLRTK VLRTDKH

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Macromolecule #7: Small ribosomal subunit protein uS7

MacromoleculeName: Small ribosomal subunit protein uS7 / type: protein_or_peptide / ID: 7 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mycolicibacterium smegmatis (bacteria)
Molecular weightTheoretical: 17.660375 KDa
SequenceString:
MPRKGPAPKR PLVNDPVYGS QLVTQLVNKV LLEGKKSLAE RIVYGALEQA REKTGTDPVV TLKRALDNVK PALEVRSRRV GGATYQVPV EVRPDRSTTL ALRWLVNFSR QRREKTMVER LANEILDASN GLGASVKRRE DTHKMAEANR AFAHYRW

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Macromolecule #8: Small ribosomal subunit protein uS8

MacromoleculeName: Small ribosomal subunit protein uS8 / type: protein_or_peptide / ID: 8 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mycolicibacterium smegmatis (bacteria)
Molecular weightTheoretical: 14.492638 KDa
SequenceString:
MTMTDPIADF LTRLRNANSA YHDEVTLPHS KLKANIAEIL KREGYISDYR TEDARVGKSL VVQLKYGPSR ERSIAGLRRV SKPGLRVYA KSTNLPRVLG GLGVAIISTS SGLLTDRQAA RQGVGGEVLA YVW

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Macromolecule #9: Small ribosomal subunit protein uS9

MacromoleculeName: Small ribosomal subunit protein uS9 / type: protein_or_peptide / ID: 9 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mycolicibacterium smegmatis (bacteria)
Molecular weightTheoretical: 16.794365 KDa
SequenceString:
MTDVTETEVV TESAEPREPV IIDRPIQTVG RRKEAVVRVR LVPGTGQFNL DGRTLENYFP NKVHQQLIKA PLVTVDRVDQ FDIYAHLDG GGPSGQAGAL RLAIARALIL VQPEDRPALK KAGFLTRDPR AIERKKYGLK KARKAPQYSK R

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Macromolecule #10: Small ribosomal subunit protein uS10

MacromoleculeName: Small ribosomal subunit protein uS10 / type: protein_or_peptide / ID: 10 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mycolicibacterium smegmatis (bacteria)
Molecular weightTheoretical: 11.454313 KDa
SequenceString:
MAGQKIRIRL KAYDHEAIDA SARKIVETVT RTGASVVGPV PLPTEKNVYC VIRSPHKYKD SREHFEMRTH KRLIDILDPT PKTVDALMR IDLPASVDVN IQ

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Macromolecule #11: Small ribosomal subunit protein uS11

MacromoleculeName: Small ribosomal subunit protein uS11 / type: protein_or_peptide / ID: 11 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mycolicibacterium smegmatis (bacteria)
Molecular weightTheoretical: 14.671762 KDa
SequenceString:
MAQAKKGGTA AKKGQKTRRR EKKNVPHGAA HIKSTFNNTI VSITDPQGNV IAWASSGHVG FKGSRKSTPF AAQLAAENAA RKAQEHGVK KVDVFVKGPG SGRETAIRSL QAAGLEVGTI SDVTPQPHNG CRPPKRRRV

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Macromolecule #12: Small ribosomal subunit protein uS12

MacromoleculeName: Small ribosomal subunit protein uS12 / type: protein_or_peptide / ID: 12 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mycolicibacterium smegmatis (bacteria)
Molecular weightTheoretical: 13.896366 KDa
SequenceString:
MPTIQQLVRK GRRDKIAKVK TAALKGSPQR RGVCTRVYTT TPKKPNSALR KVARVKLTSQ VEVTAYIPGE GHNLQEHSMV LVRGGRVKD LPGVRYKIIR GSLDTQGVKN RKQARSRYGA KKEKS

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Macromolecule #13: Small ribosomal subunit protein uS14B

MacromoleculeName: Small ribosomal subunit protein uS14B / type: protein_or_peptide / ID: 13 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mycolicibacterium smegmatis (bacteria)
Molecular weightTheoretical: 6.976409 KDa
SequenceString:
MAKKALVHKA NKKPKFAVRA YTRCNKCGRP HSVYRKFGLC RICLREMAHA GELPGVQKSS W

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Macromolecule #14: Small ribosomal subunit protein uS15

MacromoleculeName: Small ribosomal subunit protein uS15 / type: protein_or_peptide / ID: 14 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mycolicibacterium smegmatis (bacteria)
Molecular weightTheoretical: 10.368097 KDa
SequenceString:
MALTAEQKKE ILGQYGLHDT DTGSPEAQVA LLTKRIQDLT EHLKVHKHDH HSRRGLLLLV GRRRRLLKYV AQVDVARYRS LIERLGLRR

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Macromolecule #15: Small ribosomal subunit protein bS16

MacromoleculeName: Small ribosomal subunit protein bS16 / type: protein_or_peptide / ID: 15 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mycolicibacterium smegmatis (bacteria)
Molecular weightTheoretical: 16.795207 KDa
SequenceString:
MAVKIKLTRL GKIRNPQYRI IVADARTRRD GRAIEVIGRY HPKEEPSLIQ IDSERAQYWL GVGAQPTEPV LALLKITGDW QKFKGLPGA EGTLKVKEPK PSKLDLFNAA LAEAESGTTA AATTPKKKKA PKKDEAAEAP AEAAEAPAEA ADAASES

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Macromolecule #16: Small ribosomal subunit protein uS17

MacromoleculeName: Small ribosomal subunit protein uS17 / type: protein_or_peptide / ID: 16 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mycolicibacterium smegmatis (bacteria)
Molecular weightTheoretical: 11.127002 KDa
SequenceString:
MADQKGPKYT PAAEKPRGRR KTAIGYVVSD KMQKTIVVEL EDRKSHPLYG KIIRTTKKVK AHDENGEAGI GDRVSLMETR PLSATKRWR LVEILEKAK

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Macromolecule #17: Small ribosomal subunit protein bS18B

MacromoleculeName: Small ribosomal subunit protein bS18B / type: protein_or_peptide / ID: 17 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mycolicibacterium smegmatis (bacteria)
Molecular weightTheoretical: 9.524188 KDa
SequenceString:
MAKSNKRRPA PEKPVKTRKC VFCSKKGQTI DYKDTALLRT YISERGKIRA RRVTGNCVQH QRDIAVAVKN AREVALLPFG SSTR

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Macromolecule #18: Small ribosomal subunit protein bS20

MacromoleculeName: Small ribosomal subunit protein bS20 / type: protein_or_peptide / ID: 18 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mycolicibacterium smegmatis (bacteria)
Molecular weightTheoretical: 9.556104 KDa
SequenceString:
MANIKSQIKR IRTNERRRLR NQSVKSSLRT AIRGFREAVD AGDKDKASEL LHATSRKLDK AASKGVIHPN QAANKKSALA LALNKL

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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: 7.6
VitrificationCryogen name: ETHANE-PROPANE / Chamber humidity: 100 %

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 43.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.4000000000000001 µm / Nominal defocus min: 0.3 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: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 5) / Number images used: 45709
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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