6X7K image
Deposition Date 2020-05-30
Release Date 2020-09-02
Last Version Date 2024-11-06
Entry Detail
PDB ID:
6X7K
Keywords:
RIBOSOME,TRANSCRIPTION/TRANSLATION
Title:
Cryo-EM structure of an Escherichia coli coupled transcription-translation complex B3 (TTC-B3) containing an mRNA with a 24 nt long spacer, transcription factors NusA and NusG, and fMet-tRNAs at P-site and E-site
Biological Source:
Source Organism:
Escherichia coli (Taxon ID: 562)
synthetic construct (Taxon ID: 32630)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
3.10 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
6X7K validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L21
Chain IDs:A (auth: 0)
Chain Length:103
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0AG48 Pfam ID:PF00829
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L22
Chain IDs:B (auth: 1)
Chain Length:110
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P61175 Pfam ID:PF00237
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L23
Chain IDs:C (auth: 2)
Chain Length:100
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0ADZ0 Pfam ID:PF00276
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L24
Chain IDs:D (auth: 3)
Chain Length:104
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P60624 Pfam ID:PF00467, PF17136
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L25
Chain IDs:E (auth: 4)
Chain Length:94
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P68919 Pfam ID:PF01386
Polymer Type:polydeoxyribonucleotide
Molecule:NT DNA
Chain IDs:F (auth: 5)
Chain Length:36
Number of Molecules:1
Biological Source:synthetic construct
Polymer Type:polydeoxyribonucleotide
Molecule:T DNA
Chain IDs:G (auth: 6)
Chain Length:36
Number of Molecules:1
Biological Source:synthetic construct
Polymer Type:polyribonucleotide
Molecule:mRNA with 24 nt long spacer
Chain IDs:H (auth: 7)
Chain Length:41
Number of Molecules:1
Biological Source:synthetic construct
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L10
Chain IDs:I (auth: 9)
Chain Length:165
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7J3 Pfam ID:PF00466
Polymer Type:polyribonucleotide
Molecule:E-site and P-site tRNA (fMet)
Chain IDs:J (auth: A), R (auth: B)
Chain Length:2904
Number of Molecules:2
Biological Source:Escherichia coli
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase subunit beta
Chain IDs:K (auth: AA)
Chain Length:1342
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A8V2 Pfam ID:PF04563, PF04561, PF04565, PF10385, PF00562, PF04560
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transcription termination/antitermination protein NusG
Chain IDs:L (auth: AB)
Chain Length:181
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0AFG0 Pfam ID:PF02357, PF00467
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase subunit alpha
Chain IDs:M (auth: AC), N (auth: AD)
Chain Length:329
Number of Molecules:2
Biological Source:Escherichia coli
UniProt ID:P0A7Z4 Pfam ID:PF01193, PF01000, PF03118
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase subunit beta'
Chain IDs:O (auth: AE)
Chain Length:1407
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A8T7 Pfam ID:PF04997, PF00623, PF04983, PF05000, PF04998
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase subunit omega
Chain IDs:P (auth: AF)
Chain Length:91
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A800 Pfam ID:PF01192
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Transcription termination/antitermination protein NusA
Chain IDs:Q (auth: AG)
Chain Length:495
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0AFF6 Pfam ID:PF08529, PF00575, PF13184, PF14520
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S18
Chain IDs:S (auth: C)
Chain Length:75
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7T7 Pfam ID:PF01084
Polymer Type:polyribonucleotide
Molecule:16S rRNA
Chain IDs:T (auth: D)
Chain Length:1542
Number of Molecules:1
Biological Source:Escherichia coli
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S20
Chain IDs:U (auth: E)
Chain Length:87
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7U7 Pfam ID:PF01649
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S21
Chain IDs:V (auth: F)
Chain Length:59
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P68679 Pfam ID:PF01165
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S2
Chain IDs:W (auth: G)
Chain Length:241
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7V0 Pfam ID:PF00318
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S1
Chain IDs:X (auth: H)
Chain Length:273
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0AG67 Pfam ID:PF00575
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S3
Chain IDs:Y (auth: I)
Chain Length:57
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7V3 Pfam ID:PF07650, PF00189
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S4
Chain IDs:Z (auth: J)
Chain Length:206
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7V8 Pfam ID:PF00163, PF01479
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S5
Chain IDs:AA (auth: K)
Chain Length:55
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7W1 Pfam ID:PF00333, PF03719
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S6
Gene (Uniprot):rpsF
Chain IDs:BA (auth: L)
Chain Length:135
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P02358 Pfam ID:PF01250
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S7
Chain IDs:CA (auth: M)
Chain Length:179
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P02359 Pfam ID:PF00177
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S8
Chain IDs:DA (auth: N)
Chain Length:179
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7W7 Pfam ID:PF00410
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S9
Chain IDs:EA (auth: O)
Chain Length:65
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7X3 Pfam ID:PF00380
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S10
Chain IDs:FA (auth: P)
Chain Length:177
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7R5 Pfam ID:PF00338
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S11
Chain IDs:GA (auth: Q)
Chain Length:38
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7R9 Pfam ID:PF00411
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S12
Chain IDs:HA (auth: R)
Chain Length:124
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7S3 Pfam ID:PF00164
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S14
Chain IDs:IA (auth: S)
Chain Length:101
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0AG59 Pfam ID:PF00253
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S15
Chain IDs:JA (auth: T)
Chain Length:89
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0ADZ4 Pfam ID:PF00312
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S16
Chain IDs:KA (auth: U)
Chain Length:144
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7T3 Pfam ID:PF00886
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S17
Chain IDs:LA (auth: V)
Chain Length:136
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0AG63 Pfam ID:PF00366
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S19
Chain IDs:MA (auth: W)
Chain Length:127
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7U3 Pfam ID:PF00203
Protein Blast
Polymer Type:polypeptide(L)
Molecule:30S ribosomal protein S13
Chain IDs:NA (auth: X)
Chain Length:118
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7S9 Pfam ID:PF00416
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L11
Chain IDs:OA (auth: Y)
Chain Length:142
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7J7 Pfam ID:PF03946, PF00298
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L7/L12
Chain IDs:PA (auth: Z)
Chain Length:118
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7K2 Pfam ID:PF16320, PF00542
Polymer Type:polyribonucleotide
Molecule:23S rRNA
Chain IDs:QA (auth: a)
Chain Length:2904
Number of Molecules:1
Biological Source:Escherichia coli
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L27
Gene (Uniprot):rpmA
Chain IDs:RA (auth: b)
Chain Length:85
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7L8 Pfam ID:PF01016
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L28
Chain IDs:SA (auth: c)
Chain Length:75
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7M2 Pfam ID:PF00830
Polymer Type:polyribonucleotide
Molecule:5S rRNA
Chain IDs:TA (auth: d)
Chain Length:1542
Number of Molecules:1
Biological Source:Escherichia coli
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L29
Chain IDs:UA (auth: e)
Chain Length:87
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7M6 Pfam ID:PF00831
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L30
Chain IDs:VA (auth: f)
Chain Length:59
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0AG51 Pfam ID:PF00327
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L31
Chain IDs:WA (auth: g)
Chain Length:241
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7M9 Pfam ID:PF01197
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L2
Gene (Uniprot):rplB
Chain IDs:XA (auth: h)
Chain Length:273
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P60422 Pfam ID:PF00181, PF03947
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L32
Chain IDs:YA (auth: i)
Chain Length:57
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7N4 Pfam ID:PF01783
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L3
Gene (Uniprot):rplC
Chain IDs:ZA (auth: j)
Chain Length:206
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P60438 Pfam ID:PF00297
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L33
Chain IDs:AB (auth: k)
Chain Length:55
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7N9 Pfam ID:PF00471
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L4
Chain IDs:BB (auth: l)
Chain Length:135
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P60723 Pfam ID:PF00573
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L34
Chain IDs:CB (auth: m)
Chain Length:179
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7P5 Pfam ID:PF00468
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L5
Chain IDs:DB (auth: n)
Chain Length:179
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P62399 Pfam ID:PF00281, PF00673
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L35
Chain IDs:EB (auth: o)
Chain Length:65
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7Q1 Pfam ID:PF01632
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L6
Chain IDs:FB (auth: p)
Chain Length:177
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0AG55 Pfam ID:PF00347
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L36
Chain IDs:GB (auth: q)
Chain Length:38
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7Q6 Pfam ID:PF00444
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L9
Chain IDs:HB (auth: r)
Chain Length:124
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7R1 Pfam ID:PF01281, PF03948
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L13
Chain IDs:IB (auth: s)
Chain Length:101
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0AA10 Pfam ID:PF00572
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L14
Chain IDs:JB (auth: t)
Chain Length:89
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0ADY3 Pfam ID:PF00238
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L15
Chain IDs:KB (auth: u)
Chain Length:144
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P02413 Pfam ID:PF00828
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L16
Gene (Uniprot):rplP
Chain IDs:LB (auth: v)
Chain Length:136
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0ADY7 Pfam ID:PF00252
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L17
Chain IDs:MB (auth: w)
Chain Length:127
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0AG44 Pfam ID:PF01196
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L18
Chain IDs:NB (auth: x)
Chain Length:118
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0C018 Pfam ID:PF00861
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L19
Chain IDs:OB (auth: y)
Chain Length:142
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7K6 Pfam ID:PF01245
Protein Blast
Polymer Type:polypeptide(L)
Molecule:50S ribosomal protein L20
Chain IDs:PB (auth: z)
Chain Length:118
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0A7L3 Pfam ID:PF00453
Ligand Molecules
MG
ZN
Primary Citation
Structural basis of transcription-translation coupling.
Science 369 1359 1365 (2020)
PMID: 32820061 DOI: 10.1126/science.abb5317

Abstact

In bacteria, transcription and translation are coupled processes in which the movement of RNA polymerase (RNAP)-synthesizing messenger RNA (mRNA) is coordinated with the movement of the first ribosome-translating mRNA. Coupling is modulated by the transcription factors NusG (which is thought to bridge RNAP and the ribosome) and NusA. Here, we report cryo-electron microscopy structures of Escherichia coli transcription-translation complexes (TTCs) containing different-length mRNA spacers between RNAP and the ribosome active-center P site. Structures of TTCs containing short spacers show a state incompatible with NusG bridging and NusA binding (TTC-A, previously termed "expressome"). Structures of TTCs containing longer spacers reveal a new state compatible with NusG bridging and NusA binding (TTC-B) and reveal how NusG bridges and NusA binds. We propose that TTC-B mediates NusG- and NusA-dependent transcription-translation coupling.

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Protein

Chemical

Disease

Primary Citation of related structures
6X7K