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- PDB-4csu: Cryo-EM structures of the 50S ribosome subunit bound with ObgE -

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Entry
Database: PDB / ID: 4csu
TitleCryo-EM structures of the 50S ribosome subunit bound with ObgE
Components
  • (50S RIBOSOMAL PROTEIN ...) x 30
  • 23S RRNA23S ribosomal RNA
  • 5S RRNA5S ribosomal RNA
  • GTPASE OBGE/CGTA
KeywordsRIBOSOME / (P)PPGPP / OBG / RIBOSOME ASSEMBLY / STRINGENT RESPONSE / GTPASE
Function / homology
Function and homology information


guanyl ribonucleotide binding / dormancy process / negative regulation of ribosome biogenesis / guanosine tetraphosphate binding / stringent response / ribosomal large subunit binding / transcriptional attenuation / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / positive regulation of ribosome biogenesis ...guanyl ribonucleotide binding / dormancy process / negative regulation of ribosome biogenesis / guanosine tetraphosphate binding / stringent response / ribosomal large subunit binding / transcriptional attenuation / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / positive regulation of ribosome biogenesis / negative regulation of cytoplasmic translation / translational termination / DnaA-L2 complex / translation repressor activity / negative regulation of translational initiation / negative regulation of DNA-templated DNA replication initiation / ribosome assembly / mRNA regulatory element binding translation repressor activity / response to reactive oxygen species / assembly of large subunit precursor of preribosome / : / cytosolic ribosome assembly / chromosome segregation / regulation of cell growth / DNA-templated transcription termination / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / response to radiation / mRNA 5'-UTR binding / ribosomal large subunit assembly / GDP binding / large ribosomal subunit rRNA binding / ribosome binding / large ribosomal subunit / 5S rRNA binding / cytoplasmic translation / cytosolic large ribosomal subunit / transferase activity / negative regulation of translation / tRNA binding / rRNA binding / ribosome / structural constituent of ribosome / translation / response to antibiotic / mRNA binding / GTPase activity / negative regulation of DNA-templated transcription / GTP binding / magnesium ion binding / DNA binding / RNA binding / zinc ion binding / cytosol / cytoplasm
Similarity search - Function
GTP1/OBG, conserved site / GTP1/OBG family signature. / OBG-type GTPase / GTP1/OBG domain / GTP-binding protein Obg/CgtA / GTP1/OBG domain superfamily / GTP1/OBG / Obg domain profile. / OBG-type guanine nucleotide-binding (G) domain / OBG-type guanine nucleotide-binding (G) domain profile. ...GTP1/OBG, conserved site / GTP1/OBG family signature. / OBG-type GTPase / GTP1/OBG domain / GTP-binding protein Obg/CgtA / GTP1/OBG domain superfamily / GTP1/OBG / Obg domain profile. / OBG-type guanine nucleotide-binding (G) domain / OBG-type guanine nucleotide-binding (G) domain profile. / 50S ribosome-binding GTPase / Ribosomal protein L1, bacterial-type / GTP binding domain / Ribosomal protein L1, conserved site / Ribosomal protein L1 / Ribosomal protein L1 signature. / Ribosomal protein L1, 3-layer alpha/beta-sandwich / Ribosomal protein L25, short-form / Ribosomal protein L1-like / Ribosomal protein L1/ribosomal biogenesis protein / Ribosomal protein L1p/L10e family / Ribosomal protein L11, bacterial-type / Ribosomal protein L11, conserved site / Ribosomal protein L21, conserved site / Ribosomal protein L21 signature. / Ribosomal protein L11 signature. / Ribosomal protein L16 signature 1. / : / Ribosomal protein L6, conserved site / Ribosomal protein L6 signature 1. / Ribosomal protein L16, conserved site / Ribosomal protein L16 signature 2. / Ribosomal protein L11, N-terminal / Ribosomal protein L17 signature. / Ribosomal protein L9 signature. / Ribosomal protein L9, bacteria/chloroplast / Ribosomal protein L9, C-terminal / Ribosomal protein L9, C-terminal domain / Ribosomal protein L9, C-terminal domain superfamily / Ribosomal protein L11/L12 / Ribosomal protein L11, C-terminal / Ribosomal protein L11, C-terminal domain superfamily / Ribosomal protein L11/L12, N-terminal domain superfamily / Ribosomal protein L11/L12 / Ribosomal protein L11, N-terminal domain / Ribosomal protein L11, RNA binding domain / Ribosomal L25p family / Ribosomal protein L25 / Ribosomal protein L28/L24 superfamily / Ribosomal protein L36 signature. / Ribosomal protein L25/Gln-tRNA synthetase, N-terminal / Ribosomal protein L32p, bacterial type / Ribosomal protein L25/Gln-tRNA synthetase, anti-codon-binding domain superfamily / Ribosomal protein L9, N-terminal domain superfamily / Ribosomal protein L9 / Ribosomal protein L9, N-terminal / Ribosomal protein L9, N-terminal domain / Ribosomal protein L28 / Ribosomal protein L35, conserved site / Ribosomal protein L35 signature. / Ribosomal protein L33, conserved site / Ribosomal protein L33 signature. / Ribosomal protein L35, non-mitochondrial / Ribosomal protein L5, bacterial-type / Ribosomal protein L6, bacterial-type / Ribosomal protein L18, bacterial-type / Ribosomal protein L19, conserved site / Ribosomal protein L19 signature. / Ribosomal protein L36 / Ribosomal protein L36 superfamily / Ribosomal protein L36 / Ribosomal protein L9/RNase H1, N-terminal / Ribosomal protein L20 signature. / Ribosomal protein L27, conserved site / Ribosomal protein L27 signature. / Ribosomal protein L14P, bacterial-type / Ribosomal protein L34, conserved site / Ribosomal protein L34 signature. / Ribosomal protein L22, bacterial/chloroplast-type / Ribosomal protein L35 / Ribosomal protein L35 superfamily / Ribosomal protein L2, bacterial/organellar-type / Ribosomal protein L35 / Ribosomal L28 family / Ribosomal protein L33 / Ribosomal protein L33 / Ribosomal protein L28/L24 / Ribosomal protein L33 superfamily / : / Ribosomal protein L30, bacterial-type / Ribosomal protein L16 / Ribosomal protein L18 / Ribosomal L18 of archaea, bacteria, mitoch. and chloroplast / L28p-like / Ribosomal protein L20 / Ribosomal protein L20 / Ribosomal protein L20, C-terminal / Ribosomal protein L21 / Ribosomal protein L27 / Ribosomal L27 protein
Similarity search - Domain/homology
RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Large ribosomal subunit protein uL15 / Large ribosomal subunit protein uL11 / Large ribosomal subunit protein bL19 / Large ribosomal subunit protein uL1 / Large ribosomal subunit protein bL20 / Large ribosomal subunit protein bL27 ...RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Large ribosomal subunit protein uL15 / Large ribosomal subunit protein uL11 / Large ribosomal subunit protein bL19 / Large ribosomal subunit protein uL1 / Large ribosomal subunit protein bL20 / Large ribosomal subunit protein bL27 / Large ribosomal subunit protein bL28 / Large ribosomal subunit protein uL29 / Large ribosomal subunit protein bL32 / Large ribosomal subunit protein bL33 / Large ribosomal subunit protein bL34 / Large ribosomal subunit protein bL35 / Large ribosomal subunit protein bL36A / Large ribosomal subunit protein bL9 / Large ribosomal subunit protein uL13 / Large ribosomal subunit protein uL14 / Large ribosomal subunit protein uL16 / Large ribosomal subunit protein uL23 / Large ribosomal subunit protein bL17 / Large ribosomal subunit protein bL21 / Large ribosomal subunit protein uL30 / Large ribosomal subunit protein uL6 / Large ribosomal subunit protein uL18 / GTPase ObgE/CgtA / Large ribosomal subunit protein uL2 / Large ribosomal subunit protein uL3 / Large ribosomal subunit protein uL24 / Large ribosomal subunit protein uL4 / Large ribosomal subunit protein uL22 / Large ribosomal subunit protein uL5 / Large ribosomal subunit protein bL25
Similarity search - Component
Biological speciesESCHERICHIA COLI (E. coli)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 5.5 Å
AuthorsFeng, B. / Mandava, C.S. / Guo, Q. / Wang, J. / Cao, W. / Li, N. / Zhang, Y. / Zhang, Y. / Wang, Z. / Wu, J. ...Feng, B. / Mandava, C.S. / Guo, Q. / Wang, J. / Cao, W. / Li, N. / Zhang, Y. / Zhang, Y. / Wang, Z. / Wu, J. / Sanyal, S. / Lei, J. / Gao, N.
CitationJournal: PLoS Biol / Year: 2014
Title: Structural and functional insights into the mode of action of a universally conserved Obg GTPase.
Authors: Boya Feng / Chandra Sekhar Mandava / Qiang Guo / Jie Wang / Wei Cao / Ningning Li / Yixiao Zhang / Yanqing Zhang / Zhixin Wang / Jiawei Wu / Suparna Sanyal / Jianlin Lei / Ning Gao /
Abstract: Obg proteins are a family of P-loop GTPases, conserved from bacteria to human. The Obg protein in Escherichia coli (ObgE) has been implicated in many diverse cellular functions, with proposed ...Obg proteins are a family of P-loop GTPases, conserved from bacteria to human. The Obg protein in Escherichia coli (ObgE) has been implicated in many diverse cellular functions, with proposed molecular roles in two global processes, ribosome assembly and stringent response. Here, using pre-steady state fast kinetics we demonstrate that ObgE is an anti-association factor, which prevents ribosomal subunit association and downstream steps in translation by binding to the 50S subunit. ObgE is a ribosome dependent GTPase; however, upon binding to guanosine tetraphosphate (ppGpp), the global regulator of stringent response, ObgE exhibits an enhanced interaction with the 50S subunit, resulting in increased equilibrium dissociation of the 70S ribosome into subunits. Furthermore, our cryo-electron microscopy (cryo-EM) structure of the 50S·ObgE·GMPPNP complex indicates that the evolutionarily conserved N-terminal domain (NTD) of ObgE is a tRNA structural mimic, with specific interactions with peptidyl-transferase center, displaying a marked resemblance to Class I release factors. These structural data might define ObgE as a specialized translation factor related to stress responses, and provide a framework towards future elucidation of functional interplay between ObgE and ribosome-associated (p)ppGpp regulators. Together with published data, our results suggest that ObgE might act as a checkpoint in final stages of the 50S subunit assembly under normal growth conditions. And more importantly, ObgE, as a (p)ppGpp effector, might also have a regulatory role in the production of the 50S subunit and its participation in translation under certain stressed conditions. Thus, our findings might have uncovered an under-recognized mechanism of translation control by environmental cues.
History
DepositionMar 10, 2014Deposition site: PDBE / Processing site: PDBE
Revision 1.0Jun 4, 2014Provider: repository / Type: Initial release
Revision 2.0Aug 2, 2017Group: Atomic model / Data collection / Derived calculations
Category: atom_site / em_software / struct_conn
Item: _atom_site.Cartn_x / _atom_site.Cartn_y ..._atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _em_software.fitting_id / _em_software.image_processing_id / _em_software.name
Remark 700 SHEET DETERMINATION METHOD: DSSP THE SHEETS PRESENTED AS "KA" IN EACH CHAIN ON SHEET RECORDS BELOW ... SHEET DETERMINATION METHOD: DSSP THE SHEETS PRESENTED AS "KA" IN EACH CHAIN ON SHEET RECORDS BELOW IS ACTUALLY AN 5-STRANDED BARREL THIS IS REPRESENTED BY A 6-STRANDED SHEET IN WHICH THE FIRST AND LAST STRANDS ARE IDENTICAL. THE SHEETS PRESENTED AS "WA" IN EACH CHAIN ON SHEET RECORDS BELOW IS ACTUALLY AN 6-STRANDED BARREL THIS IS REPRESENTED BY A 7-STRANDED SHEET IN WHICH THE FIRST AND LAST STRANDS ARE IDENTICAL.

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Structure visualization

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Assembly

Deposited unit
0: 50S RIBOSOMAL PROTEIN L28
1: 50S RIBOSOMAL PROTEIN L29
2: 50S RIBOSOMAL PROTEIN L30
3: 50S RIBOSOMAL PROTEIN L32
4: 50S RIBOSOMAL PROTEIN L33
5: 50S RIBOSOMAL PROTEIN L1
6: 50S RIBOSOMAL PROTEIN L34
7: 50S RIBOSOMAL PROTEIN L35
8: 50S RIBOSOMAL PROTEIN L36
9: GTPASE OBGE/CGTA
A: 5S RRNA
B: 23S RRNA
C: 50S RIBOSOMAL PROTEIN L2
D: 50S RIBOSOMAL PROTEIN L3
E: 50S RIBOSOMAL PROTEIN L4
F: 50S RIBOSOMAL PROTEIN L5
G: 50S RIBOSOMAL PROTEIN L6
H: 50S RIBOSOMAL PROTEIN L9
I: 50S RIBOSOMAL PROTEIN L11
J: 50S RIBOSOMAL PROTEIN L13
K: 50S RIBOSOMAL PROTEIN L14
L: 50S RIBOSOMAL PROTEIN L15
M: 50S RIBOSOMAL PROTEIN L16
N: 50S RIBOSOMAL PROTEIN L17
O: 50S RIBOSOMAL PROTEIN L18
P: 50S RIBOSOMAL PROTEIN L19
Q: 50S RIBOSOMAL PROTEIN L20
R: 50S RIBOSOMAL PROTEIN L21
S: 50S RIBOSOMAL PROTEIN L22
T: 50S RIBOSOMAL PROTEIN L23
U: 50S RIBOSOMAL PROTEIN L24
W: 50S RIBOSOMAL PROTEIN L25
Y: 50S RIBOSOMAL PROTEIN L27


Theoretical massNumber of molelcules
Total (without water)1,422,77733
Polymers1,422,77733
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

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50S RIBOSOMAL PROTEIN ... , 30 types, 30 molecules 012345678CDEFGHIJKLMNOPQRSTUWY

#1: Protein 50S RIBOSOMAL PROTEIN L28 /


Mass: 8896.354 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0A7M2
#2: Protein 50S RIBOSOMAL PROTEIN L29 /


Mass: 7286.464 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0A7M6
#3: Protein 50S RIBOSOMAL PROTEIN L30 /


Mass: 6423.625 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0AG51
#4: Protein 50S RIBOSOMAL PROTEIN L32 /


Mass: 6332.249 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0A7N4
#5: Protein 50S RIBOSOMAL PROTEIN L33 /


Mass: 6257.436 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0A7N9
#6: Protein 50S RIBOSOMAL PROTEIN L1 /


Mass: 24765.660 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0A7L0
#7: Protein/peptide 50S RIBOSOMAL PROTEIN L34 / / RIBOSOMAL PROTEIN A


Mass: 5397.463 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0A7P5
#8: Protein 50S RIBOSOMAL PROTEIN L35 /


Mass: 7181.835 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0A7Q1
#9: Protein/peptide 50S RIBOSOMAL PROTEIN L36 / / RIBOSOMAL PROTEIN B


Mass: 4377.390 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0A7Q6
#13: Protein 50S RIBOSOMAL PROTEIN L2 /


Mass: 29792.424 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P60422
#14: Protein 50S RIBOSOMAL PROTEIN L3 /


Mass: 22277.535 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P60438
#15: Protein 50S RIBOSOMAL PROTEIN L4 /


Mass: 22121.566 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P60723
#16: Protein 50S RIBOSOMAL PROTEIN L5 /


Mass: 20202.416 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P62399
#17: Protein 50S RIBOSOMAL PROTEIN L6 /


Mass: 18801.598 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0AG55
#18: Protein 50S RIBOSOMAL PROTEIN L9 /


Mass: 15789.020 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0A7R1
#19: Protein 50S RIBOSOMAL PROTEIN L11 /


Mass: 14763.165 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0A7J7
#20: Protein 50S RIBOSOMAL PROTEIN L13 /


Mass: 16050.606 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0AA10
#21: Protein 50S RIBOSOMAL PROTEIN L14 /


Mass: 13565.067 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0ADY3
#22: Protein 50S RIBOSOMAL PROTEIN L15 /


Mass: 14877.273 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P02413
#23: Protein 50S RIBOSOMAL PROTEIN L16 /


Mass: 15312.269 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0ADY7
#24: Protein 50S RIBOSOMAL PROTEIN L17 /


Mass: 14393.657 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0AG44
#25: Protein 50S RIBOSOMAL PROTEIN L18 /


Mass: 12663.471 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0C018
#26: Protein 50S RIBOSOMAL PROTEIN L19 /


Mass: 13028.082 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0A7K6
#27: Protein 50S RIBOSOMAL PROTEIN L20 /


Mass: 13396.828 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0A7L3
#28: Protein 50S RIBOSOMAL PROTEIN L21 /


Mass: 11586.374 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0AG48
#29: Protein 50S RIBOSOMAL PROTEIN L22 /


Mass: 12253.359 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P61175
#30: Protein 50S RIBOSOMAL PROTEIN L23 /


Mass: 11222.160 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0ADZ0
#31: Protein 50S RIBOSOMAL PROTEIN L24 /


Mass: 11208.054 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P60624
#32: Protein 50S RIBOSOMAL PROTEIN L25 /


Mass: 10713.465 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P68919
#33: Protein 50S RIBOSOMAL PROTEIN L27 /


Mass: 9015.344 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12 / References: UniProt: P0A7L8

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Protein , 1 types, 1 molecules 9

#10: Protein GTPASE OBGE/CGTA / GTP-BINDING PROTEIN OBG / OBGE


Mass: 43340.801 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) ESCHERICHIA COLI (E. coli) / Strain: K-12 / Plasmid: PET28A / Production host: ESCHERICHIA COLI (E. coli) / Strain (production host): BL21 / References: UniProt: P42641

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RNA chain , 2 types, 2 molecules AB

#11: RNA chain 5S RRNA / 5S ribosomal RNA


Mass: 38177.762 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12
#12: RNA chain 23S RRNA / 23S ribosomal RNA


Mass: 941306.188 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ESCHERICHIA COLI (E. coli) / Strain: K-12

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: 50S RIBOSOME BOUND WITH OBGE / Type: RIBOSOME
Buffer solutionName: 20MM TRIS-HCL, 100MM NH4CL,10MM MGCL2 / pH: 7.5 / Details: 20MM TRIS-HCL, 100MM NH4CL,10MM MGCL2
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportDetails: CARBON
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Details: LIQUID ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS / Date: Jul 27, 2011
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal magnification: 59000 X / Nominal defocus max: 4000 nm / Nominal defocus min: 1000 nm / Cs: 2.7 mm
Image recordingElectron dose: 20 e/Å2 / Film or detector model: FEI EAGLE (4k x 4k)
Image scansNum. digital images: 2000

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Processing

EM software
IDNameCategory
1MDFFmodel fitting
2RELION3D reconstruction
CTF correctionDetails: INDIVIDUAL PARTICLES
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionMethod: REFERENCE PROJECTIONS / Resolution: 5.5 Å / Num. of particles: 102814 / Nominal pixel size: 1.5 Å / Actual pixel size: 1.5 Å
Details: SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-2605. (DEPOSITION ID: 12315)
Symmetry type: POINT
Atomic model buildingProtocol: OTHER / Space: REAL / Details: REFINEMENT PROTOCOL--X-RAY
Atomic model buildingPDB-ID: 3OFC

3ofc
PDB Unreleased entry

RefinementHighest resolution: 5.5 Å
Refinement stepCycle: LAST / Highest resolution: 5.5 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms29853 64772 0 0 94625

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