1LNG

Crystal Structure of the SRP19-7S.S SRP RNA Complex of M. jannaschii


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.224 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the SRP19 RNA complex and implications for signal recognition particle assembly.

Hainzl, T.Huang, S.Sauer-Eriksson, A.E.

(2002) Nature 417: 767-771

  • DOI: 10.1038/nature00768
  • Also Cited By: 1Z43

  • PubMed Abstract: 
  • The signal recognition particle (SRP) is a phylogenetically conserved ribonucleoprotein. It associates with ribosomes to mediate co-translational targeting of membrane and secretory proteins to biological membranes. In mammalian cells, the SRP consis ...

    The signal recognition particle (SRP) is a phylogenetically conserved ribonucleoprotein. It associates with ribosomes to mediate co-translational targeting of membrane and secretory proteins to biological membranes. In mammalian cells, the SRP consists of a 7S RNA and six protein components. The S domain of SRP comprises the 7S.S part of RNA bound to SRP19, SRP54 and the SRP68/72 heterodimer; SRP54 has the main role in recognizing signal sequences of nascent polypeptide chains and docking SRP to its receptor. During assembly of the SRP, binding of SRP19 precedes and promotes the association of SRP54 (refs 4, 5). Here we report the crystal structure at 2.3 A resolution of the complex formed between 7S.S RNA and SRP19 in the archaeon Methanococcus jannaschii. SRP19 bridges the tips of helices 6 and 8 of 7S.S RNA by forming an extensive network of direct protein RNA interactions. Helices 6 and 8 pack side by side; tertiary RNA interactions, which also involve the strictly conserved tetraloop bases, stabilize helix 8 in a conformation competent for SRP54 binding. The structure explains the role of SRP19 and provides a molecular framework for SRP54 binding and SRP assembly in Eukarya and Archaea.


    Organizational Affiliation

    Umeå Centre for Molecular Pathogenesis, Umeå University, SE-901 87 Umeå, Sweden. tobias.hainzl@ucmp.umu.se




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Signal recognition particle 19 kDa protein
A
87Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440)Gene Names: srp19
Find proteins for Q58440 (Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440))
Go to UniProtKB:  Q58440
Entity ID: 1
MoleculeChainsLengthOrganism
7S.S SRP RNAB97Methanocaldococcus jannaschii
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.224 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 42.521α = 90.00
b = 61.405β = 90.00
c = 155.978γ = 90.00
Software Package:
Software NamePurpose
CNSphasing
DENZOdata reduction
CNSrefinement
REFMACrefinement
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-06-07
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance