6O1K

Architectural principles for Hfq/Crc-mediated regulation of gene expression. Hfq-Crc-amiE 2:2:2 complex (core complex)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.13 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Models: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Architectural principles for Hfq/Crc-mediated regulation of gene expression

Pei, X.Y.Dendooven, T.Sonnleitner, E.Chen, S.Blasi, U.Luisi, B.F.

(2019) Elife 8

  • DOI: https://doi.org/10.7554/eLife.43158
  • Primary Citation of Related Structures:  
    6O1K, 6O1L, 6O1M

  • PubMed Abstract: 

    In diverse bacterial species, the global regulator Hfq contributes to post-transcriptional networks that control expression of numerous genes. Hfq of the opportunistic pathogen Pseudomonas aeruginosa inhibits translation of target transcripts by forming a regulatory complex with the catabolite repression protein Crc. This repressive complex acts as part of an intricate mechanism of preferred nutrient utilisation. We describe high-resolution cryo-EM structures of the assembly of Hfq and Crc bound to the translation initiation site of a target mRNA. The core of the assembly is formed through interactions of two cognate RNAs, two Hfq hexamers and a Crc pair. Additional Crc protomers are recruited to the core to generate higher-order assemblies with demonstrated regulatory activity in vivo. This study reveals how Hfq cooperates with a partner protein to regulate translation, and provides a structural basis for an RNA code that guides global regulators to interact cooperatively and regulate different RNA targets.


  • Organizational Affiliation

    Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom.


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Catabolite repression control protein
A, B
262Pseudomonas aeruginosaMutation(s): 0 
Gene Names: 
EC: 3.1.11.2
UniProt
Find proteins for Q51380 (Pseudomonas aeruginosa)
Explore Q51380 
Go to UniProtKB:  Q51380
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ51380
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
RNA-binding protein Hfq
C, D, E, F, G
C, D, E, F, G, H, I, J, K, L, M, N
67Pseudomonas aeruginosa PAO1Mutation(s): 0 
Gene Names: hfqPA4944
UniProt
Find proteins for Q9HUM0 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore Q9HUM0 
Go to UniProtKB:  Q9HUM0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9HUM0
Sequence Annotations
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  • Reference Sequence

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 3
MoleculeChains LengthOrganismImage
RNA (5'-R(*AP*AP*AP*AP*AP*UP*AP*AP*CP*AP*AP*CP*AP*AP*GP*AP*GP*G)-3')
O, P
18Pseudomonas aeruginosa
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.13 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION3b
MODEL REFINEMENTPHENIX
MODEL REFINEMENTREFMAC

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom200873/Z/16/Z

Revision History  (Full details and data files)

  • Version 1.0: 2019-03-13
    Type: Initial release
  • Version 1.1: 2024-03-20
    Changes: Data collection, Database references, Refinement description