9MQ4

Damaged 70S ribosome with PrfH bound


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.78 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Molecular and structural basis of a subfamily of PrfH rescuing both the damaged and intact ribosomes stalled in translation.

Tian, Y.Li, Q.Fatma, S.Jiang, J.Jin, H.Zeng, F.Huang, R.H.

(2025) bioRxiv 

  • DOI: https://doi.org/10.1101/2025.01.09.632186
  • Primary Citation of Related Structures:  
    9MOR, 9MQ4

  • PubMed Abstract: 

    In bacteria, spontaneous mRNAs degradation and ribotoxin-induced RNA damage are two main biological events that lead to the stall of protein translation. The ubiquitous trans-translation system as well as several alternative rescue factors (Arfs) are responsible for rescuing the stalled ribosomes caused by truncated mRNAs that lack the stop codons. To date, protein release factor homolog (PrfH) is the only factor known to rescue the stalled ribosome damaged by ribotoxins. Here we show that a subfamily of PrfH, exemplified by PrfH from Capnocytophaga gingivalis ( Cg PrfH), rescues both types of stalled ribosomes described above. Our in vitro biochemical assays demonstrate that Cg PrfH hydrolyzes the peptides attached to P-site tRNAs when in complex with both the damaged and intact ribosomes. Two cryo-EM structures of Cg PrfH in complex with the damaged and intact 70S ribosomes revealed that Cg PrfH employs two different regions of the protein to recognize two different stalled ribosomes to orient the GGQ motif for peptide hydrolysis. Thus, using a combination of bioinformatic, biochemical, and structural characterization described here, we have uncovered a family of ribosome rescue factors that possesses dual activities to resolve two distinct stalled protein translation in bacteria.


  • Organizational Affiliation

    Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.


Macromolecules

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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
Peptide chain release factor HG [auth A]231Escherichia coliMutation(s): 0 
UniProt
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L2H [auth B]273Escherichia coliMutation(s): 0 
Gene Names: rplBb3317JW3279
UniProt
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L3I [auth C]209Escherichia coliMutation(s): 0 
Gene Names: rplCb3320JW3282
UniProt
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
Large ribosomal subunit protein uL4J [auth D]201Escherichia coliMutation(s): 0 
Gene Names: rplDeryAb3319JW3281
UniProt
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
Large ribosomal subunit protein uL5K [auth E]179Escherichia coliMutation(s): 0 
Gene Names: rplEb3308JW3270
UniProt
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Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
Large ribosomal subunit protein uL6L [auth F]177Escherichia coliMutation(s): 0 
Gene Names: rplFb3305JW3267
UniProt
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Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
Large ribosomal subunit protein bL9M [auth G]149Escherichia coliMutation(s): 0 
Gene Names: rplIb4203JW4161
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Entity ID: 13
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L10N [auth H]165Escherichia coliMutation(s): 0 
Gene Names: rplJb3985JW3948
UniProt
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Entity ID: 14
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L11O [auth I]142Escherichia coliMutation(s): 0 
Gene Names: rplKrelCb3983JW3946
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Entity ID: 15
MoleculeChains Sequence LengthOrganismDetailsImage
Large ribosomal subunit protein uL13P [auth J]142Escherichia coliMutation(s): 0 
Gene Names: rplMb3231JW3200
UniProt
Find proteins for P0AA10 (Escherichia coli (strain K12))
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Entity ID: 16
MoleculeChains Sequence LengthOrganismDetailsImage
Large ribosomal subunit protein uL14Q [auth K]123Escherichia coliMutation(s): 0 
Gene Names: rplNb3310JW3272
UniProt
Find proteins for P0ADY3 (Escherichia coli (strain K12))
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Entity ID: 17
MoleculeChains Sequence LengthOrganismDetailsImage
Large ribosomal subunit protein uL15R [auth L]144Escherichia coliMutation(s): 0 
Gene Names: rplOb3301JW3263
UniProt
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Entity ID: 18
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L16S [auth M]136Escherichia coliMutation(s): 0 
Gene Names: rplPb3313JW3275
UniProt
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Entity ID: 19
MoleculeChains Sequence LengthOrganismDetailsImage
Large ribosomal subunit protein bL17T [auth N]127Escherichia coliMutation(s): 0 
Gene Names: rplQb3294JW3256
UniProt
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Entity ID: 20
MoleculeChains Sequence LengthOrganismDetailsImage
Large ribosomal subunit protein uL18U [auth O]117Escherichia coliMutation(s): 0 
Gene Names: rplRb3304JW3266
UniProt
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Entity ID: 21
MoleculeChains Sequence LengthOrganismDetailsImage
Large ribosomal subunit protein bL19V [auth P]115Escherichia coliMutation(s): 0 
Gene Names: rplS
UniProt
Find proteins for P0A7K6 (Escherichia coli (strain K12))
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Entity ID: 22
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L20W [auth Q]118Escherichia coliMutation(s): 0 
Gene Names: rplT
UniProt
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Entity ID: 23
MoleculeChains Sequence LengthOrganismDetailsImage
Large ribosomal subunit protein bL21X [auth R]103Escherichia coliMutation(s): 0 
Gene Names: rplUUTI89_C3620
UniProt
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Entity ID: 24
MoleculeChains Sequence LengthOrganismDetailsImage
Large ribosomal subunit protein uL22Y [auth S]110Escherichia coliMutation(s): 0 
Gene Names: rplVUTI89_C3767
UniProt
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Entity ID: 25
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L23Z [auth T]100Escherichia coliMutation(s): 0 
Gene Names: 
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Entity ID: 26
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L24AA [auth U]104Escherichia coliMutation(s): 0 
Gene Names: 
UniProt
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Entity ID: 27
MoleculeChains Sequence LengthOrganismDetailsImage
Large ribosomal subunit protein bL25BA [auth V]94Escherichia coliMutation(s): 0 
Gene Names: rplY
UniProt
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Entity ID: 28
MoleculeChains Sequence LengthOrganismDetailsImage
Large ribosomal subunit protein bL27CA [auth W]85Escherichia coliMutation(s): 0 
Gene Names: rpmA
UniProt
Find proteins for P0A7L8 (Escherichia coli (strain K12))
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Entity ID: 29
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L28DA [auth X]78Escherichia coliMutation(s): 0 
Gene Names: rpmBECVG_03476
UniProt
Find proteins for P0A7M2 (Escherichia coli (strain K12))
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Entity ID: 30
MoleculeChains Sequence LengthOrganismDetailsImage
Large ribosomal subunit protein uL29EA [auth Y]63Escherichia coliMutation(s): 0 
Gene Names: 
UniProt
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Entity ID: 31
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L30FA [auth Z]59Escherichia coliMutation(s): 0 
Gene Names: 
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Entity ID: 32
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L31GA [auth a]70Escherichia coliMutation(s): 0 
Gene Names: rpmEb3936JW3907
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Entity ID: 33
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L32HA [auth b]57Escherichia coliMutation(s): 0 
Gene Names: 
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Entity ID: 34
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L33IA [auth c]55Escherichia coliMutation(s): 0 
Gene Names: 
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Entity ID: 35
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L34JA [auth d]46Escherichia coliMutation(s): 0 
Gene Names: rpmH
UniProt
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Entity ID: 36
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L35KA [auth e]65Escherichia coliMutation(s): 0 
Gene Names: rpmIb1717JW1707
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Entity ID: 37
MoleculeChains Sequence LengthOrganismDetailsImage
50S ribosomal protein L36LA [auth f]38Escherichia coliMutation(s): 0 
Gene Names: rpmJ
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Entity ID: 38
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S2MA [auth g]241Escherichia coliMutation(s): 0 
Gene Names: rpsB
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Entity ID: 39
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S3NA [auth h]233Escherichia coliMutation(s): 0 
Gene Names: rpsC
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Entity ID: 40
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S4OA [auth i]206Escherichia coliMutation(s): 0 
Gene Names: rpsDramAb3296JW3258
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Entity ID: 41
MoleculeChains Sequence LengthOrganismDetailsImage
Small ribosomal subunit protein uS5PA [auth j]167Escherichia coli 0.1197Mutation(s): 0 
Gene Names: rpsEspcb3303JW3265
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Entity ID: 42
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S6QA [auth k]135Escherichia coliMutation(s): 0 
Gene Names: rpsFb4200JW4158
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Entity ID: 43
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S7RA [auth l]179Escherichia coliMutation(s): 0 
Gene Names: rpsGb3341JW3303
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Entity ID: 44
MoleculeChains Sequence LengthOrganismDetailsImage
Small ribosomal subunit protein uS8SA [auth m]130Escherichia coliMutation(s): 0 
Gene Names: rpsH
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Entity ID: 45
MoleculeChains Sequence LengthOrganismDetailsImage
Small ribosomal subunit protein uS9TA [auth n]130Escherichia coliMutation(s): 0 
Gene Names: rpsI
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Entity ID: 46
MoleculeChains Sequence LengthOrganismDetailsImage
Small ribosomal subunit protein uS10UA [auth o]103Escherichia coliMutation(s): 0 
Gene Names: rpsJ
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Entity ID: 47
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S11VA [auth p]129Escherichia coliMutation(s): 0 
Gene Names: rpsK
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Entity ID: 48
MoleculeChains Sequence LengthOrganismDetailsImage
Small ribosomal subunit protein uS12WA [auth q]124Escherichia coliMutation(s): 0 
Gene Names: 
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Find proteins for P0A7S3 (Escherichia coli (strain K12))
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Entity ID: 49
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S13XA [auth r]118Escherichia coliMutation(s): 0 
Gene Names: rpsMG711_03878
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Entity ID: 50
MoleculeChains Sequence LengthOrganismDetailsImage
Small ribosomal subunit protein uS14YA [auth s]101Escherichia coliMutation(s): 0 
Gene Names: rpsNNCTC9073_00385
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Find proteins for P0AG59 (Escherichia coli (strain K12))
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Entity ID: 51
MoleculeChains Sequence LengthOrganismDetailsImage
Small ribosomal subunit protein uS15ZA [auth t]89Escherichia coliMutation(s): 0 
Gene Names: rpsO
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Entity ID: 52
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S16AB [auth u]82Escherichia coliMutation(s): 0 
Gene Names: rpsP
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Entity ID: 53
MoleculeChains Sequence LengthOrganismDetailsImage
Small ribosomal subunit protein uS17BB [auth v]84Escherichia coliMutation(s): 0 
Gene Names: rpsQ
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Entity ID: 54
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S18CB [auth w]75Escherichia coliMutation(s): 0 
Gene Names: rpsR
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Entity ID: 55
MoleculeChains Sequence LengthOrganismDetailsImage
Small ribosomal subunit protein uS19DB [auth x]92Escherichia coliMutation(s): 0 
Gene Names: rpsS
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Entity ID: 56
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S20EB [auth y]87Escherichia coliMutation(s): 0 
Gene Names: rpsT
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Entity ID: 57
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S21FB [auth z]71Escherichia coliMutation(s): 0 
Gene Names: rpsU
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Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download Ideal Coordinates CCD File 
CS [auth f],
YR [auth a]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
MG
Query on MG

Download Ideal Coordinates CCD File 
AC [auth 1]
AD [auth 1]
AE [auth 1]
AF [auth 1]
AG [auth 1]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
0TD
Query on 0TD
WA [auth q]L-PEPTIDE LINKINGC5 H9 N O4 SASP
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.78 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM145060
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM120764
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM120552
National Natural Science Foundation of China (NSFC)China32171200

Revision History  (Full details and data files)

  • Version 1.0: 2025-02-05
    Type: Initial release