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- PDB-3jcj: Structures of ribosome-bound initiation factor 2 reveal the mecha... -

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Basic information

Entry
Database: PDB / ID: 3jcj
TitleStructures of ribosome-bound initiation factor 2 reveal the mechanism of subunit association
Components
  • (30S ribosomal protein ...) x 20
  • (50S ribosomal protein ...) x 30
  • 16S ribosomal RNA
  • 23S ribosomal RNA
  • 5S ribosomal RNA
  • Translation initiation factor IF-2
  • messenger RNA
  • tRNATransfer RNA
KeywordsRIBOSOME / translation initiation / translation initiation factor 2 / IF2 / translational GTPase / 70S / fMet-tRNA
Function / homology
Function and homology information


guanosine tetraphosphate binding / stringent response / mRNA base-pairing translational repressor activity / ornithine decarboxylase inhibitor activity / ribosomal small subunit binding / misfolded RNA binding / transcription antitermination factor activity, RNA binding / Group I intron splicing / RNA folding / transcriptional attenuation ...guanosine tetraphosphate binding / stringent response / mRNA base-pairing translational repressor activity / ornithine decarboxylase inhibitor activity / ribosomal small subunit binding / misfolded RNA binding / transcription antitermination factor activity, RNA binding / Group I intron splicing / RNA folding / transcriptional attenuation / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / positive regulation of ribosome biogenesis / negative regulation of cytoplasmic translation / translational termination / chaperone-mediated protein folding / DnaA-L2 complex / four-way junction DNA binding / translation repressor activity / negative regulation of translational initiation / translational initiation / negative regulation of DNA-templated DNA replication initiation / regulation of mRNA stability / ribosome assembly / translation initiation factor activity / response to cold / mRNA regulatory element binding translation repressor activity / response to reactive oxygen species / assembly of large subunit precursor of preribosome / transcription elongation factor complex / positive regulation of RNA splicing / DNA endonuclease activity / : / cytosolic ribosome assembly / regulation of DNA-templated transcription elongation / transcription antitermination / regulation of cell growth / maintenance of translational fidelity / DNA-templated transcription termination / response to radiation / mRNA 5'-UTR binding / ribosomal small subunit biogenesis / small ribosomal subunit rRNA binding / ribosomal small subunit assembly / ribosomal large subunit assembly / cytosolic small ribosomal subunit / large ribosomal subunit rRNA binding / ribosome binding / large ribosomal subunit / ribosome biogenesis / regulation of translation / small ribosomal subunit / 5S rRNA binding / cytosolic large ribosomal subunit / cytoplasmic translation / transferase activity / tRNA binding / negative regulation of translation / rRNA binding / molecular adaptor activity / ribosome / structural constituent of ribosome / translation / response to antibiotic / mRNA binding / GTPase activity / negative regulation of DNA-templated transcription / GTP binding / DNA binding / RNA binding / zinc ion binding / membrane / cytosol / cytoplasm
Similarity search - Function
Initiation factor 2 associated domain, bacterial / Bacterial translation initiation factor IF-2 associated region / Translation initiation factor IF-2, N-terminal / Translation initiation factor IF-2, N-terminal region / Translation initiation factor IF-2, domain II / Initiation factor 2 signature. / Translation initiation factor IF-2, bacterial-like / Translation initiation factor IF- 2, domain 3 / Translation-initiation factor 2 / Translation initiation factor IF- 2 ...Initiation factor 2 associated domain, bacterial / Bacterial translation initiation factor IF-2 associated region / Translation initiation factor IF-2, N-terminal / Translation initiation factor IF-2, N-terminal region / Translation initiation factor IF-2, domain II / Initiation factor 2 signature. / Translation initiation factor IF-2, bacterial-like / Translation initiation factor IF- 2, domain 3 / Translation-initiation factor 2 / Translation initiation factor IF- 2 / Translation initiation factor IF-2, domain 3 superfamily / Putative DNA-binding domain superfamily / Ribosomal protein L10, eubacterial, conserved site / Ribosomal protein L10 signature. / Ribosomal protein L10 / : / Translation elongation factor EFTu-like, domain 2 / Ribosomal protein S21, conserved site / Ribosomal protein S21 signature. / Ribosomal protein L25, short-form / Elongation factor Tu domain 2 / Ribosomal protein S14, bacterial/plastid / Ribosomal protein L11, bacterial-type / Ribosomal protein S21 superfamily / Ribosomal protein S21 / Ribosomal protein S16, conserved site / Ribosomal protein S16 signature. / Translational (tr)-type GTP-binding domain / Elongation factor Tu GTP binding domain / Translational (tr)-type guanine nucleotide-binding (G) domain profile. / Ribosomal protein S21 / Ribosomal protein L11, conserved site / Ribosomal protein L10-like domain superfamily / Ribosomal protein L21, conserved site / Ribosomal protein L21 signature. / Ribosomal protein L10P / Ribosomal protein L10 / 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 S3, bacterial-type / Ribosomal protein L27, conserved site / Ribosomal protein S6, conserved site / Ribosomal protein L27 signature. / Ribosomal protein S6 signature. / Ribosomal protein S19, bacterial-type / Ribosomal protein S7, bacterial/organellar-type / Ribosomal protein S11, bacterial-type / Ribosomal protein S13, bacterial-type / Ribosomal protein S20 / Ribosomal protein S20 superfamily / Ribosomal protein S20 / Ribosomal protein S9, bacterial/plastid / Ribosomal protein L14P, bacterial-type / Ribosomal protein S4, bacterial-type
Similarity search - Domain/homology
N-FORMYLMETHIONINE / PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER / : / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Small ribosomal subunit protein bS6 / Small ribosomal subunit protein uS7 / Large ribosomal subunit protein uL15 ...N-FORMYLMETHIONINE / PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER / : / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Small ribosomal subunit protein bS6 / Small ribosomal subunit protein uS7 / Large ribosomal subunit protein uL15 / Translation initiation factor IF-2 / Large ribosomal subunit protein uL10 / Large ribosomal subunit protein uL11 / Large ribosomal subunit protein bL19 / 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 / Small ribosomal subunit protein uS10 / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein uS12 / Small ribosomal subunit protein uS13 / Small ribosomal subunit protein bS16 / Small ribosomal subunit protein bS18 / Small ribosomal subunit protein uS19 / Small ribosomal subunit protein bS20 / Small ribosomal subunit protein uS2 / Small ribosomal subunit protein uS3 / Small ribosomal subunit protein uS4 / Small ribosomal subunit protein uS5 / Small ribosomal subunit protein uS8 / Small ribosomal subunit protein uS9 / Large ribosomal subunit protein uL13 / Large ribosomal subunit protein uL14 / Large ribosomal subunit protein uL16 / Large ribosomal subunit protein uL23 / Small ribosomal subunit protein uS15 / Large ribosomal subunit protein bL17 / Large ribosomal subunit protein bL21 / Large ribosomal subunit protein uL30 / Large ribosomal subunit protein uL6 / Small ribosomal subunit protein uS14 / Small ribosomal subunit protein uS17 / Large ribosomal subunit protein uL18 / 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 / Small ribosomal subunit protein bS21 / Large ribosomal subunit protein bL25
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.7 Å
AuthorsSprink, T. / Ramrath, D.J.F. / Yamamoto, H. / Yamamoto, K. / Loerke, J. / Ismer, J. / Hildebrand, P.W. / Scheerer, P. / Buerger, J. / Mielke, T. / Spahn, C.M.T.
CitationJournal: Sci Adv / Year: 2016
Title: Structures of ribosome-bound initiation factor 2 reveal the mechanism of subunit association.
Authors: Thiemo Sprink / David J F Ramrath / Hiroshi Yamamoto / Kaori Yamamoto / Justus Loerke / Jochen Ismer / Peter W Hildebrand / Patrick Scheerer / Jörg Bürger / Thorsten Mielke / Christian M T Spahn /
Abstract: Throughout the four phases of protein biosynthesis-initiation, elongation, termination, and recycling-the ribosome is controlled and regulated by at least one specified translational guanosine ...Throughout the four phases of protein biosynthesis-initiation, elongation, termination, and recycling-the ribosome is controlled and regulated by at least one specified translational guanosine triphosphatase (trGTPase). Although the structural basis for trGTPase interaction with the ribosome has been solved for the last three steps of translation, the high-resolution structure for the key initiation trGTPase, initiation factor 2 (IF2), complexed with the ribosome, remains elusive. We determine the structure of IF2 complexed with a nonhydrolyzable guanosine triphosphate analog and initiator fMet-tRNAi (Met) in the context of the Escherichia coli ribosome to 3.7-Å resolution using cryo-electron microscopy. The structural analysis reveals previously unseen intrinsic conformational modes of the 70S initiation complex, establishing the mutual interplay of IF2 and initator transfer RNA (tRNA) with the ribsosome and providing the structural foundation for a mechanistic understanding of the final steps of translation initiation.
History
DepositionDec 18, 2015Deposition site: RCSB / Processing site: RCSB
Revision 1.0Mar 9, 2016Provider: repository / Type: Initial release
Revision 1.1Nov 16, 2016Group: Database references
Revision 1.2Jul 18, 2018Group: Data collection / Category: em_image_scans / em_software / Item: _em_software.image_processing_id

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Structure visualization

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Assembly

Deposited unit
0: 5S ribosomal RNA
1: 30S ribosomal protein S18
2: 30S ribosomal protein S21
3: 30S ribosomal protein S20
4: messenger RNA
A: 23S ribosomal RNA
B: 50S ribosomal protein L2
C: 50S ribosomal protein L3
D: 50S ribosomal protein L4
E: 50S ribosomal protein L5
F: 50S ribosomal protein L6
G: 50S ribosomal protein L9
H: 50S ribosomal protein L11
I: 50S ribosomal protein L13
J: 50S ribosomal protein L14
K: 50S ribosomal protein L15
L: 50S ribosomal protein L16
M: 50S ribosomal protein L17
N: 50S ribosomal protein L18
O: 50S ribosomal protein L19
P: 50S ribosomal protein L20
Q: 50S ribosomal protein L21
R: 50S ribosomal protein L22
S: 50S ribosomal protein L23
T: 50S ribosomal protein L24
U: 50S ribosomal protein L25
V: 50S ribosomal protein L27
W: 50S ribosomal protein L28
X: 50S ribosomal protein L29
Y: 50S ribosomal protein L30
Z: 50S ribosomal protein L32
a: 50S ribosomal protein L33
b: 50S ribosomal protein L34
c: 50S ribosomal protein L35
d: 50S ribosomal protein L36
e: 50S ribosomal protein L10
f: Translation initiation factor IF-2
g: 16S ribosomal RNA
h: 30S ribosomal protein S3
j: 30S ribosomal protein S2
k: 30S ribosomal protein S5
l: 30S ribosomal protein S4
m: 30S ribosomal protein S7
n: 30S ribosomal protein S6
o: 30S ribosomal protein S9
p: 30S ribosomal protein S8
q: 30S ribosomal protein S11
r: 30S ribosomal protein S10
s: 30S ribosomal protein S13
t: 30S ribosomal protein S12
u: 30S ribosomal protein S15
v: tRNA
w: 30S ribosomal protein S14
x: 30S ribosomal protein S17
y: 30S ribosomal protein S16
z: 30S ribosomal protein S19
hetero molecules


Theoretical massNumber of molelcules
Total (without water)2,308,858254
Polymers2,303,35456
Non-polymers5,504198
Water15,079837
1


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

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Components

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RNA chain , 5 types, 5 molecules 04Agv

#1: RNA chain 5S ribosomal RNA /


Mass: 38177.762 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: GenBank: U00096.3
#5: RNA chain messenger RNA /


Mass: 16904.293 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli)
#6: RNA chain 23S ribosomal RNA /


Mass: 941612.375 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli)
#38: RNA chain 16S ribosomal RNA /


Mass: 499690.031 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: GenBank: U00096.3
#52: RNA chain tRNA / Transfer RNA


Mass: 24818.893 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli)

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30S ribosomal protein ... , 20 types, 20 molecules 123hjklmnopqrstuwxyz

#2: Protein 30S ribosomal protein S18 /


Mass: 9005.472 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7T7
#3: Protein 30S ribosomal protein S21 /


Mass: 8524.039 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P68679
#4: Protein 30S ribosomal protein S20 /


Mass: 9708.464 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7U7
#39: Protein 30S ribosomal protein S3 /


Mass: 26031.316 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7V3
#40: Protein 30S ribosomal protein S2 /


Mass: 26781.670 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7V0
#41: Protein 30S ribosomal protein S5 /


Mass: 17629.398 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7W1
#42: Protein 30S ribosomal protein S4 /


Mass: 23514.199 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7V8
#43: Protein 30S ribosomal protein S7 /


Mass: 20055.156 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P02359
#44: Protein 30S ribosomal protein S6 /


Mass: 15727.512 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P02358
#45: Protein 30S ribosomal protein S9 /


Mass: 14886.270 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7X3
#46: Protein 30S ribosomal protein S8 /


Mass: 14146.557 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7W7
#47: Protein 30S ribosomal protein S11 /


Mass: 13870.975 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7R9
#48: Protein 30S ribosomal protein S10 /


Mass: 11698.545 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7R5
#49: Protein 30S ribosomal protein S13 /


Mass: 13128.467 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7S9
#50: Protein 30S ribosomal protein S12 /


Mass: 13768.157 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7S3
#51: Protein 30S ribosomal protein S15 /


Mass: 10290.816 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0ADZ4
#53: Protein 30S ribosomal protein S14 /


Mass: 11606.560 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0AG59
#54: Protein 30S ribosomal protein S17 /


Mass: 9724.491 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0AG63
#55: Protein 30S ribosomal protein S16 /


Mass: 9207.572 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7T3
#56: Protein 30S ribosomal protein S19 /


Mass: 10455.355 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7U3

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50S ribosomal protein ... , 30 types, 30 molecules BCDEFGHIJKLMNOPQRSTUVWXYZabcde

#7: Protein 50S ribosomal protein L2 /


Mass: 29923.619 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P60422
#8: 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) / References: UniProt: P60438
#9: 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) / References: UniProt: P60723
#10: Protein 50S ribosomal protein L5 /


Mass: 20333.611 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P62399
#11: Protein 50S ribosomal protein L6 /


Mass: 18932.791 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0AG55
#12: 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) / References: UniProt: P0A7R1
#13: Protein 50S ribosomal protein L11 /


Mass: 14894.362 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7J7
#14: 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) / References: UniProt: P0AA10
#15: 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) / References: UniProt: P0ADY3
#16: Protein 50S ribosomal protein L15 /


Mass: 15008.471 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P02413
#17: 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) / References: UniProt: P0ADY7
#18: 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) / References: UniProt: P0AG44
#19: Protein 50S ribosomal protein L18 /


Mass: 12794.668 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0C018
#20: Protein 50S ribosomal protein L19 /


Mass: 13159.278 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7K6
#21: Protein 50S ribosomal protein L20 /


Mass: 13528.024 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7L3
#22: 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) / References: UniProt: P0AG48
#23: 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) / References: UniProt: P61175
#24: 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) / References: UniProt: P0ADZ0
#25: Protein 50S ribosomal protein L24 /


Mass: 11339.250 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P60624
#26: 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) / References: UniProt: P68919
#27: Protein 50S ribosomal protein L27 /


Mass: 9146.540 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7L8
#28: Protein 50S ribosomal protein L28 /


Mass: 9027.551 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7M2
#29: 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) / References: UniProt: P0A7M6
#30: Protein 50S ribosomal protein L30 /


Mass: 6554.820 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0AG51
#31: Protein 50S ribosomal protein L32 /


Mass: 6463.445 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7N4
#32: Protein 50S ribosomal protein L33 /


Mass: 6388.631 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7N9
#33: Protein/peptide 50S ribosomal protein L34 /


Mass: 5397.463 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7P5
#34: Protein 50S ribosomal protein L35 /


Mass: 7313.032 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7Q1
#35: Protein/peptide 50S ribosomal protein L36 /


Mass: 4377.390 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7Q6
#36: Protein 50S ribosomal protein L10 /


Mass: 17736.596 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7J3

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Protein , 1 types, 1 molecules f

#37: Protein Translation initiation factor IF-2


Mass: 97498.164 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli) / Gene: infB, gicD, ssyG, b3168, JW3137 / Plasmid: pQE-60 / Production host: Escherichia coli (E. coli) / References: UniProt: P0A705

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Non-polymers , 5 types, 1035 molecules

#57: Chemical...
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 195 / Source method: obtained synthetically / Formula: Mg
#58: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Zn
#59: Chemical ChemComp-GNP / PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER / 5'-Guanylyl imidodiphosphate


Mass: 522.196 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C10H17N6O13P3
Comment: GppNHp, GMPPNP, energy-carrying molecule analogue*YM
#60: Chemical ChemComp-FME / N-FORMYLMETHIONINE / N-Formylmethionine


Type: L-peptide linking / Mass: 177.221 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C6H11NO3S
#61: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 837 / Source method: isolated from a natural source / Formula: H2O

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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

Component
IDNameTypeParent-IDSynonym
170S-fMet-tRNAiMet-IF2-GDPNP complexRIBOSOME0
270S ribosomeRibosomeRIBOSOME170S
3fMet-tRNAiMet1initiator tRNA
4Initiation Factor 21IF2
Buffer solutionName: 20 mM HEPES-KOH, pH 7.5, 15 mM magnesium acetate, 150 mM potassium acetate, 4 mM 2-mercapthoethanol, 2 mM spermidine, 0.05 mM spermine
pH: 7.5
Details: 20 mM HEPES-KOH, pH 7.5, 15 mM magnesium acetate, 150 mM potassium acetate, 4 mM 2-mercapthoethanol, 2 mM spermidine, 0.05 mM spermine
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportDetails: Quantifoil R3-3 Cu 300 mesh with 2 nm carbon support film
VitrificationInstrument: FEI VITROBOT MARK I / Cryogen name: ETHANE / Humidity: 100 %
Details: Blot for 2-4 seconds before plunging into liquid ethane (FEI VITROBOT MARK I).
Method: Blot for 2-4 seconds before plunging

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Electron microscopy imaging

Experimental equipment
Model: Tecnai Polara / Image courtesy: FEI Company
EM imaging

Accelerating voltage: 300 kV / Calibrated magnification: 39000 X / Electron source: FIELD EMISSION GUN / Illumination mode: FLOOD BEAM / Model: FEI POLARA 300 / Mode: BRIGHT FIELDBright-field microscopy / Cs: 2 mm / Nominal magnification: 31000 X / Specimen holder type: GATAN LIQUID NITROGEN / Specimen-ID: 1

IDDateNominal defocus max (nm)Nominal defocus min (nm)
1Aug 28, 20137180640
2Jun 10, 20157570190
Image recordingElectron dose: 20 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of real images: 918 / Details: Super-resolution Mode

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Processing

EM software
IDNameVersionCategory
1CTFFIND4CTF correction
2EMAN23D reconstruction
3SPARX3D reconstruction
4SPIDER3D reconstruction
CTF correctionDetails: CTFFIND4
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 54585 / Nominal pixel size: 1.025 Å / Actual pixel size: 1.025 Å
Details: Final maps were calculated from two combined datasets. To avoid overfitting, the data were refined in a resolution-limited scheme using SPIDER.
Symmetry type: POINT
Refinement stepCycle: LAST
ProteinNucleic acidLigandSolventTotal
Num. atoms48683 98590 237 837 148347

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