7SSL image
Entry Detail
PDB ID:
7SSL
EMDB ID:
Keywords:
Title:
Pre translocation intermediate with EF-G bound to GDP and Pi (Structure III)
Biological Source:
PDB Version:
Deposition Date:
2021-11-11
Release Date:
2022-02-23
Method Details:
Experimental Method:
Resolution:
3.80 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polyribonucleotide
Description:23S rRNA
Chain IDs:B (auth: 1)
Chain Length:2903
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polyribonucleotide
Description:5S rRNA
Chain IDs:C (auth: 2)
Chain Length:120
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polyribonucleotide
Description:16S rRNA
Chain IDs:A (auth: 3)
Chain Length:1539
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polyribonucleotide
Description:mRNA
Chain IDs:KA (auth: 4)
Chain Length:35
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polyribonucleotide
Description:tRNA Pro
Chain IDs:D (auth: 5)
Chain Length:77
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polyribonucleotide
Description:tRNA fMet
Chain IDs:LA (auth: 6)
Chain Length:77
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:Elongation factor G
Chain IDs:E (auth: 8)
Chain Length:697
Number of Molecules:1
Biological Source:Escherichia coli 113303
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L31
Chain IDs:EA (auth: A)
Chain Length:223
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L32
Chain IDs:FA (auth: B)
Chain Length:271
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L33
Chain IDs:GA (auth: C)
Chain Length:50
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L34
Chain IDs:HA (auth: D)
Chain Length:201
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L35
Chain IDs:IA (auth: E)
Chain Length:64
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L36
Chain IDs:JA (auth: F)
Chain Length:176
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S2
Chain IDs:MA (auth: G)
Chain Length:225
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S3
Chain IDs:NA (auth: H)
Chain Length:206
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S4
Chain IDs:OA (auth: I)
Chain Length:205
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S5
Chain IDs:PA (auth: J)
Chain Length:142
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S6
Chain IDs:QA (auth: K)
Chain Length:100
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S7
Chain IDs:RA (auth: L)
Chain Length:151
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S8
Chain IDs:SA (auth: M)
Chain Length:136
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S9
Chain IDs:TA (auth: N)
Chain Length:127
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S10
Chain IDs:UA (auth: O)
Chain Length:98
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S11
Chain IDs:VA (auth: P)
Chain Length:116
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S12
Chain IDs:WA (auth: Q)
Chain Length:123
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S13
Chain IDs:XA (auth: R)
Chain Length:114
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S14
Chain IDs:YA (auth: S)
Chain Length:110
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S15
Chain IDs:ZA (auth: T)
Chain Length:93
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S16
Chain IDs:AB (auth: U)
Chain Length:102
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S17
Chain IDs:BB (auth: V)
Chain Length:80
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S18
Chain IDs:CB (auth: W)
Chain Length:75
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S19
Chain IDs:DB (auth: X)
Chain Length:79
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S20
Chain IDs:EB (auth: Y)
Chain Length:63
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:30S ribosomal protein S21
Chain IDs:FB (auth: Z)
Chain Length:65
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L1
Chain IDs:L (auth: a)
Chain Length:223
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L2
Chain IDs:F (auth: b)
Chain Length:271
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L3
Chain IDs:G (auth: c)
Chain Length:50
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L4
Chain IDs:H (auth: d)
Chain Length:201
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L5
Chain IDs:I (auth: e)
Chain Length:64
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L6
Chain IDs:J (auth: f)
Chain Length:176
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L9
Chain IDs:K (auth: g)
Chain Length:225
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L11
Chain IDs:M (auth: i)
Chain Length:205
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L13
Chain IDs:N (auth: j)
Chain Length:142
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L14
Chain IDs:O (auth: k)
Chain Length:100
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L15
Chain IDs:P (auth: l)
Chain Length:151
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L16
Chain IDs:Q (auth: m)
Chain Length:136
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L17
Chain IDs:R (auth: n)
Chain Length:127
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L18
Chain IDs:S (auth: o)
Chain Length:98
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L19
Chain IDs:T (auth: p)
Chain Length:116
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L20
Chain IDs:U (auth: q)
Chain Length:123
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L21
Chain IDs:V (auth: r)
Chain Length:114
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L22
Chain IDs:W (auth: s)
Chain Length:110
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L23
Chain IDs:X (auth: t)
Chain Length:93
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L24
Chain IDs:Y (auth: u)
Chain Length:102
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L25
Chain IDs:Z (auth: v)
Chain Length:80
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L27
Chain IDs:AA (auth: w)
Chain Length:75
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L28
Chain IDs:BA (auth: x)
Chain Length:79
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L29
Chain IDs:CA (auth: y)
Chain Length:63
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:50S ribosomal protein L30
Chain IDs:DA (auth: z)
Chain Length:65
Number of Molecules:1
Biological Source:Escherichia coli K-12
Primary Citation
Time-resolved cryo-EM visualizes ribosomal translocation with EF-G and GTP.
Nat Commun 12 7236 7236 (2021)
PMID: 34903725 DOI: 10.1038/s41467-021-27415-0

Abstact

During translation, a conserved GTPase elongation factor-EF-G in bacteria or eEF2 in eukaryotes-translocates tRNA and mRNA through the ribosome. EF-G has been proposed to act as a flexible motor that propels tRNA and mRNA movement, as a rigid pawl that biases unidirectional translocation resulting from ribosome rearrangements, or by various combinations of motor- and pawl-like mechanisms. Using time-resolved cryo-EM, we visualized GTP-catalyzed translocation without inhibitors, capturing elusive structures of ribosome•EF-G intermediates at near-atomic resolution. Prior to translocation, EF-G binds near peptidyl-tRNA, while the rotated 30S subunit stabilizes the EF-G GTPase center. Reverse 30S rotation releases Pi and translocates peptidyl-tRNA and EF-G by ~20 Å. An additional 4-Å translocation initiates EF-G dissociation from a transient ribosome state with highly swiveled 30S head. The structures visualize how nearly rigid EF-G rectifies inherent and spontaneous ribosomal dynamics into tRNA-mRNA translocation, whereas GTP hydrolysis and Pi release drive EF-G dissociation.

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Primary Citation of related structures