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- PDB-5lzb: Structure of SelB-Sec-tRNASec bound to the 70S ribosome in the in... -

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Basic information

Entry
Database: PDB / ID: 5lzb
TitleStructure of SelB-Sec-tRNASec bound to the 70S ribosome in the initial binding state (IB)
Components
  • (30S ribosomal protein ...) x 20
  • (50S ribosomal protein ...) x 30
  • 16S ribosomal RNA
  • 23S ribosomal RNA
  • 5S ribosomal RNA
  • CCA 3' end of E-site tRNASec (low occupancy)
  • SECIS mRNA
  • Sec-tRNASec
  • Selenocysteine-specific elongation factor
  • fMet-tRNAfMet
KeywordsRIBOSOME / translation / decoding / recoding / selenocysteine
Function / homology
Function and homology information


selenocysteine metabolic process / selenocysteine insertion sequence binding / selenocysteine incorporation / negative regulation of cytoplasmic translational initiation / stringent response / ornithine decarboxylase inhibitor activity / transcription antitermination factor activity, RNA binding / misfolded RNA binding / Group I intron splicing / RNA folding ...selenocysteine metabolic process / selenocysteine insertion sequence binding / selenocysteine incorporation / negative regulation of cytoplasmic translational initiation / stringent response / ornithine decarboxylase inhibitor activity / transcription antitermination factor activity, RNA binding / misfolded RNA binding / Group I intron splicing / RNA folding / transcriptional attenuation / translation elongation factor activity / positive regulation of ribosome biogenesis / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / translational termination / negative regulation of cytoplasmic translation / four-way junction DNA binding / DnaA-L2 complex / translation repressor activity / negative regulation of translational initiation / regulation of mRNA stability / negative regulation of DNA-templated DNA replication initiation / mRNA regulatory element binding translation repressor activity / assembly of large subunit precursor of preribosome / positive regulation of RNA splicing / ribosome assembly / transcription elongation factor complex / cytosolic ribosome assembly / regulation of DNA-templated transcription elongation / DNA endonuclease activity / response to reactive oxygen species / transcription antitermination / regulation of cell growth / translational initiation / DNA-templated transcription termination / maintenance of translational fidelity / response to radiation / mRNA 5'-UTR binding / GDP binding / regulation of translation / ribosome biogenesis / large ribosomal subunit / ribosome binding / transferase activity / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / 5S rRNA binding / ribosomal large subunit assembly / cytosolic small ribosomal subunit / large ribosomal subunit rRNA binding / cytosolic large ribosomal subunit / cytoplasmic translation / tRNA binding / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / translation / response to antibiotic / GTPase activity / negative regulation of DNA-templated transcription / mRNA binding / GTP binding / DNA binding / RNA binding / zinc ion binding / membrane / cytosol / cytoplasm
Similarity search - Function
: / : / Selenocysteine-specific elongation factor, winged helix domain / Selenocysteine-specific elongation factor, winged helix 1/3 / Translation elongation factor SelB, winged helix, type 2 / Elongation factor SelB, winged helix / Translation elongation factor SelB, winged helix, type 3 / Elongation factor SelB, winged helix / Translation elongation factor, selenocysteine-specific / : ...: / : / Selenocysteine-specific elongation factor, winged helix domain / Selenocysteine-specific elongation factor, winged helix 1/3 / Translation elongation factor SelB, winged helix, type 2 / Elongation factor SelB, winged helix / Translation elongation factor SelB, winged helix, type 3 / Elongation factor SelB, winged helix / Translation elongation factor, selenocysteine-specific / : / Translation elongation factor EF1A/initiation factor IF2gamma, C-terminal / Tr-type G domain, conserved site / Translational (tr)-type guanine nucleotide-binding (G) domain signature. / Translation elongation factor EFTu-like, domain 2 / Ribosomal protein S21, conserved site / Ribosomal protein S21 signature. / Ribosomal protein L11, bacterial-type / Elongation factor Tu domain 2 / Ribosomal protein L25, short-form / Ribosomal protein S14, bacterial/plastid / Ribosomal protein L31 type A / 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 L31 signature. / Ribosomal protein L31 / Ribosomal protein L31 superfamily / Ribosomal protein L31 / Ribosomal protein L11, conserved site / Ribosomal protein L11 signature. / : / Ribosomal protein L16 signature 1. / Ribosomal protein L21, conserved site / Ribosomal protein L21 signature. / Ribosomal protein L16, conserved site / Ribosomal protein L16 signature 2. / Ribosomal protein L6, conserved site / Ribosomal protein L6 signature 1. / : / 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, N-terminal / Ribosomal protein L11, N-terminal domain / 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, RNA binding domain / Ribosomal protein L17 signature. / Ribosomal L25p family / Ribosomal protein L25 / Ribosomal protein L36 signature. / Ribosomal protein L28/L24 superfamily / Ribosomal protein L32p, bacterial type / Ribosomal protein L25/Gln-tRNA synthetase, N-terminal / 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 L33, conserved site / Ribosomal protein L33 signature. / Ribosomal protein L35, conserved site / Ribosomal protein L35 signature. / : / Ribosomal protein L28 / Ribosomal protein L35, non-mitochondrial / Ribosomal protein L5, bacterial-type / Ribosomal protein L18, bacterial-type / : / Ribosomal protein L6, bacterial-type / Ribosomal protein S3, bacterial-type / Ribosomal protein S19, bacterial-type / Ribosomal protein L9/RNase H1, N-terminal / Ribosomal protein S13, bacterial-type / Ribosomal protein S6, conserved site / Ribosomal protein S6 signature. / Ribosomal protein S7, bacterial/organellar-type / Ribosomal protein S9, bacterial/plastid / Ribosomal protein L36 / Ribosomal protein S11, bacterial-type / Ribosomal protein L36 superfamily / Ribosomal protein L36 / Ribosomal protein S20 / Ribosomal protein S20 superfamily / Ribosomal protein S20 / Ribosomal protein S4, bacterial-type / Ribosomal protein L19, conserved site / Ribosomal protein L19 signature. / 30S ribosomal protein S17 / Ribosomal protein S5, bacterial-type
Similarity search - Domain/homology
N-FORMYLMETHIONINE / PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER / SELENOCYSTEINE / : / : / : / : / : / RNA / RNA (> 10) ...N-FORMYLMETHIONINE / PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER / SELENOCYSTEINE / : / : / : / : / : / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Small ribosomal subunit protein bS6 / Small ribosomal subunit protein uS7 / Large ribosomal subunit protein uL15 / 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 bL31 / 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 / Selenocysteine-specific elongation factor / 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: 5.3 Å
AuthorsFischer, N. / Neumann, P. / Bock, L.V. / Maracci, C. / Wang, Z. / Paleskava, A. / Konevega, A.L. / Schroeder, G.F. / Grubmueller, H. / Ficner, R. ...Fischer, N. / Neumann, P. / Bock, L.V. / Maracci, C. / Wang, Z. / Paleskava, A. / Konevega, A.L. / Schroeder, G.F. / Grubmueller, H. / Ficner, R. / Rodnina, M.V. / Stark, H.
Funding support Germany, 2items
OrganizationGrant numberCountry
German Research FoundationFOR1805 Germany
German Research FoundationSonderforschungsbereich 860 Germany
CitationJournal: Nature / Year: 2016
Title: The pathway to GTPase activation of elongation factor SelB on the ribosome.
Authors: Niels Fischer / Piotr Neumann / Lars V Bock / Cristina Maracci / Zhe Wang / Alena Paleskava / Andrey L Konevega / Gunnar F Schröder / Helmut Grubmüller / Ralf Ficner / Marina V Rodnina / Holger Stark /
Abstract: In all domains of life, selenocysteine (Sec) is delivered to the ribosome by selenocysteine-specific tRNA (tRNA) with the help of a specialized translation factor, SelB in bacteria. Sec-tRNA recodes ...In all domains of life, selenocysteine (Sec) is delivered to the ribosome by selenocysteine-specific tRNA (tRNA) with the help of a specialized translation factor, SelB in bacteria. Sec-tRNA recodes a UGA stop codon next to a downstream mRNA stem-loop. Here we present the structures of six intermediates on the pathway of UGA recoding in Escherichia coli by single-particle cryo-electron microscopy. The structures explain the specificity of Sec-tRNA binding by SelB and show large-scale rearrangements of Sec-tRNA. Upon initial binding of SelB-Sec-tRNA to the ribosome and codon reading, the 30S subunit adopts an open conformation with Sec-tRNA covering the sarcin-ricin loop (SRL) on the 50S subunit. Subsequent codon recognition results in a local closure of the decoding site, which moves Sec-tRNA away from the SRL and triggers a global closure of the 30S subunit shoulder domain. As a consequence, SelB docks on the SRL, activating the GTPase of SelB. These results reveal how codon recognition triggers GTPase activation in translational GTPases.
History
DepositionSep 29, 2016Deposition site: PDBE / Processing site: PDBE
Revision 1.0Nov 23, 2016Provider: repository / Type: Initial release
Revision 1.1Dec 14, 2016Group: Database references
Revision 1.2Aug 30, 2017Group: Author supporting evidence / Data collection ...Author supporting evidence / Data collection / Derived calculations / Refinement description
Category: em_3d_fitting / em_image_scans ...em_3d_fitting / em_image_scans / em_software / pdbx_audit_support / struct_conn
Item: _em_3d_fitting.target_criteria / _pdbx_audit_support.funding_organization
Revision 2.0Feb 20, 2019Group: Data collection / Derived calculations ...Data collection / Derived calculations / Polymer sequence / Structure summary
Category: em_admin / em_entity_assembly ...em_admin / em_entity_assembly / entity_poly / ndb_struct_na_base_pair / ndb_struct_na_base_pair_step / pdbx_database_proc / pdbx_seq_map_depositor_info / struct_conn
Item: _em_admin.last_update / _em_entity_assembly.entity_id_list ..._em_admin.last_update / _em_entity_assembly.entity_id_list / _entity_poly.pdbx_seq_one_letter_code_can / _pdbx_seq_map_depositor_info.one_letter_code / _pdbx_seq_map_depositor_info.one_letter_code_mod
Revision 2.1Apr 24, 2024Group: Data collection / Database references / Derived calculations
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / struct_conn
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_conn.conn_type_id / _struct_conn.id / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id / _struct_conn.ptnr2_label_seq_id
Revision 2.2Nov 20, 2024Group: Data collection / Structure summary
Category: em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _em_admin.last_update

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Structure visualization

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Assembly

Deposited unit
a: 16S ribosomal RNA
b: 30S ribosomal protein S2
c: 30S ribosomal protein S3
d: 30S ribosomal protein S4
e: 30S ribosomal protein S5
f: 30S ribosomal protein S6
g: 30S ribosomal protein S7
h: 30S ribosomal protein S8
i: 30S ribosomal protein S9
j: 30S ribosomal protein S10
k: 30S ribosomal protein S11
l: 30S ribosomal protein S12
m: 30S ribosomal protein S13
n: 30S ribosomal protein S14
o: 30S ribosomal protein S15
p: 30S ribosomal protein S16
q: 30S ribosomal protein S17
r: 30S ribosomal protein S18
s: 30S ribosomal protein S19
t: 30S ribosomal protein S20
u: 30S ribosomal protein S21
v: fMet-tRNAfMet
x: SECIS mRNA
y: Sec-tRNASec
z: Selenocysteine-specific elongation factor
A: 23S ribosomal RNA
B: 5S ribosomal RNA
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
I: 50S ribosomal protein L11
H: 50S ribosomal protein L9
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
V: 50S ribosomal protein L25
W: 50S ribosomal protein L27
X: 50S ribosomal protein L28
Y: 50S ribosomal protein L29
Z: 50S ribosomal protein L30
0: 50S ribosomal protein L32
1: 50S ribosomal protein L33
2: 50S ribosomal protein L34
3: 50S ribosomal protein L35
4: 50S ribosomal protein L36
6: 50S ribosomal protein L31
w: CCA 3' end of E-site tRNASec (low occupancy)
hetero molecules


Theoretical massNumber of molelcules
Total (without water)2,268,82364
Polymers2,267,80058
Non-polymers1,0236
Water362
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area282300 Å2
ΔGint-2119 kcal/mol
Surface area842630 Å2
MethodPISA

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Components

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RNA chain , 7 types, 7 molecules avxyABw

#1: RNA chain 16S ribosomal RNA


Mass: 498908.844 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: GenBank: 817573384
#22: RNA chain fMet-tRNAfMet


Mass: 24818.893 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: GenBank: 687670942
#23: RNA chain SECIS mRNA


Mass: 15439.191 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Escherichia coli (E. coli)
#24: RNA chain Sec-tRNASec


Mass: 30670.271 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: GenBank: 1043308734
#26: RNA chain 23S ribosomal RNA


Mass: 941505.375 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: GenBank: 42756
#27: RNA chain 5S ribosomal RNA


Mass: 38790.090 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: GenBank: 1028475309
#58: RNA chain CCA 3' end of E-site tRNASec (low occupancy)


Mass: 894.612 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 bcdefghijklmnopqrstu

#2: Protein 30S ribosomal protein S2


Mass: 24253.943 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7V0
#3: Protein 30S ribosomal protein S3


Mass: 23078.785 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7V3
#4: Protein 30S ribosomal protein S4


Mass: 23383.002 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7V8
#5: Protein 30S ribosomal protein S5


Mass: 16532.088 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7W1
#6: Protein 30S ribosomal protein S6


Mass: 11669.371 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P02358
#7: Protein 30S ribosomal protein S7


Mass: 16861.523 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P02359
#8: Protein 30S ribosomal protein S8


Mass: 14015.361 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7W7
#9: Protein 30S ribosomal protein S9


Mass: 14554.882 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7X3
#10: Protein 30S ribosomal protein S10


Mass: 11196.988 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7R5
#11: Protein 30S ribosomal protein S11


Mass: 12388.068 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7R9
#12: Protein 30S ribosomal protein S12


Mass: 13636.961 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7S3
#13: Protein 30S ribosomal protein S13


Mass: 12625.753 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7S9
#14: Protein 30S ribosomal protein S14


Mass: 11475.364 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0AG59
#15: Protein 30S ribosomal protein S15


Mass: 10159.621 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0ADZ4
#16: 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
#17: Protein 30S ribosomal protein S17


Mass: 9263.946 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0AG63
#18: Protein 30S ribosomal protein S18


Mass: 7606.768 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7T7
#19: Protein 30S ribosomal protein S19


Mass: 9057.626 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7U3
#20: Protein 30S ribosomal protein S20


Mass: 9506.190 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7U7
#21: Protein 30S ribosomal protein S21


Mass: 7763.073 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P68679

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Protein , 1 types, 1 molecules z

#25: Protein Selenocysteine-specific elongation factor / SelB translation factor


Mass: 68964.352 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P14081

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50S ribosomal protein ... , 30 types, 30 molecules CDEFGIHJKLMNOPQRSTUVWXYZ012346

#28: Protein 50S ribosomal protein L2


Mass: 29663.244 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P60422
#29: 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
#30: 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
#31: Protein 50S ribosomal protein L5


Mass: 20073.234 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P62399
#32: 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) / References: UniProt: P0AG55
#33: 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) / References: UniProt: P0A7J7
#34: 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
#35: 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
#36: Protein 50S ribosomal protein L14


Mass: 13451.910 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0ADY3
#37: 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) / References: UniProt: P02413
#38: 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
#39: Protein 50S ribosomal protein L17


Mass: 13721.938 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0AG44
#40: 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) / References: UniProt: P0C018
#41: 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) / References: UniProt: P0A7K6
#42: 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) / References: UniProt: P0A7L3
#43: 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
#44: 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
#45: Protein 50S ribosomal protein L23


Mass: 10546.472 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0ADZ0
#46: Protein 50S ribosomal protein L24


Mass: 11078.874 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P60624
#47: 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
#48: Protein 50S ribosomal protein L27


Mass: 8174.394 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7L8
#49: 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) / References: UniProt: P0A7M2
#50: 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
#51: 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) / References: UniProt: P0AG51
#52: 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) / References: UniProt: P0A7N4
#53: Protein/peptide 50S ribosomal protein L33


Mass: 5814.842 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7N9
#54: 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
#55: Protein 50S ribosomal protein L35 / Ribosomal protein A


Mass: 7181.835 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7Q1
#56: 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) / References: UniProt: P0A7Q6
#57: Protein 50S ribosomal protein L31


Mass: 7516.693 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7M9

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Non-polymers , 6 types, 8 molecules

#59: Chemical ChemComp-FME / N-FORMYLMETHIONINE


Type: L-peptide linking / Mass: 177.221 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C6H11NO3S
#60: Chemical ChemComp-SEC / SELENOCYSTEINE


Type: L-peptide linking / Mass: 168.053 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C3H7NO2Se
#61: Chemical ChemComp-GNP / PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER


Mass: 522.196 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C10H17N6O13P3
Comment: GppNHp, GMPPNP, energy-carrying molecule analogue*YM
#62: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Mg
#63: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Zn
#64: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Formula: H2O

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Details

Has protein modificationY

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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: Initial binding state of E. coli ribosome 70S-SelB-GDPNP-Sec-tRNASec-fMet-tRNAfmet-SECIS mRNA complex (IB)
Type: COMPLEX / Entity ID: #1-#58 / Source: MULTIPLE SOURCES
Molecular weightValue: 2.5 MDa / Experimental value: NO
Source (natural)Organism: Escherichia coli (E. coli) / Strain: MRE600
Buffer solutionpH: 7.5
Details: 50 mM Hepes-KOH, pH 7.5, 70 mM NH4Cl, 30 mM KCl, 7 mM MgCl2, 0.6mM spermine, 0.4mM spermidine, 2 mM DTT
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid type: Quantifoil R3.5/1
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 %

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Details: Using a Cs-corrector from CEOS electron optical aberrations were corrected to residual phase errors of 45degree at scattering angles of >12 to 15 mrad.
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: SPOT SCAN
Electron lensMode: BRIGHT FIELD / Nominal magnification: 59000 X / Nominal defocus max: 2600 nm / Nominal defocus min: 700 nm / Cs: 0.001 mm / Alignment procedure: ZEMLIN TABLEAU
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 1 sec. / Electron dose: 30 e/Å2 / Detector mode: INTEGRATING / Film or detector model: FEI FALCON II (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 12681
EM imaging opticsSpherical aberration corrector: CEOS Cs-corrector

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Processing

EM software
IDNameVersionCategoryDetails
9Rosetta3.5model refinementinitial modelling & optimization
10Coot0.8.3model refinementinitial modelling
11RCrane1.1model refinementinitial modelling
12PHENIX1.10.1 & developmentalmodel refinementreal space refinement
13PHENIX1.10.1model refinementreciprocal space refinement
17RELION1.33D reconstruction
18ERRASERmodel refinement
CTF correctionDetails: Local CTF correction, after MSA based classification and averaging of local power spectra
Type: PHASE FLIPPING ONLY
Particle selectionNum. of particles selected: 969526
Details: 969526 ribosome particles showing Thon rings better than 3.5A (see CTF correction)
3D reconstructionResolution: 5.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 8002
Details: Gold-standard refinement of independent half maps in Relion 1.3
Symmetry type: POINT
Atomic model buildingProtocol: FLEXIBLE FIT / Target criteria: Maximum likelihood
Details: For parts of the model exhibiting larger conformational differences and/or lower local map resolution, additional cycles of real space refinement and manual fitting were performed against ...Details: For parts of the model exhibiting larger conformational differences and/or lower local map resolution, additional cycles of real space refinement and manual fitting were performed against experimental map filtered to lower resolution

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