4KRF

Structure of Human Argonaute-1 let-7 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.101 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.175 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The making of a slicer: activation of human argonaute-1.

Faehnle, C.R.Elkayam, E.Haase, A.D.Hannon, G.J.Joshua-Tor, L.

(2013) Cell Rep 3: 1901-1909

  • DOI: 10.1016/j.celrep.2013.05.033
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Argonautes are the central protein component in small RNA silencing pathways. Of the four human Argonautes (hAgo1-hAgo4) only hAgo2 is an active slicer. We determined the structure of hAgo1 bound to endogenous copurified RNAs to 1.75 Å resolution and ...

    Argonautes are the central protein component in small RNA silencing pathways. Of the four human Argonautes (hAgo1-hAgo4) only hAgo2 is an active slicer. We determined the structure of hAgo1 bound to endogenous copurified RNAs to 1.75 Å resolution and hAgo1 loaded with let-7 microRNA to 2.1 Å. Both structures are strikingly similar to the structures of hAgo2. A conserved catalytic tetrad within the PIWI domain of hAgo2 is required for its slicing activity. Completion of the tetrad, combined with a mutation on a loop adjacent to the active site of hAgo1, results in slicer activity that is substantially enhanced by swapping in the N domain of hAgo2. hAgo3, with an intact tetrad, becomes an active slicer by swapping the N domain of hAgo2 without additional mutations. Intriguingly, the elements that make Argonaute an active slicer involve a sophisticated interplay between the active site and more distant regions of the enzyme.


    Organizational Affiliation

    W.M. Keck Structural Biology Laboratory, Cold Spring Harbor Laboratory, 1 Bungtown Road, Cold Spring Harbor, NY 11724, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein argonaute-1
A
858Homo sapiensGene Names: AGO1 (EIF2C1)
Find proteins for Q9UL18 (Homo sapiens)
Go to Gene View: AGO1
Go to UniProtKB:  Q9UL18
Entity ID: 2
MoleculeChainsLengthOrganism
RNA (5'-R(P*UP*GP*AP*GP*GP*UP*AP*GP*UP*AP*GP*GP*UP*UP*GP*UP*AP*UP*AP*GP*UP*U)-3')R22N/A
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.101 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.175 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 70.390α = 90.00
b = 97.730β = 110.89
c = 72.700γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PDB_EXTRACTdata extraction
PHENIXrefinement
XDSdata reduction
CBASSdata collection
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-06-19
    Type: Initial release
  • Version 1.1: 2013-07-17
    Type: Database references