1QZW

Crystal structure of the complete core of archaeal SRP and implications for inter-domain communication


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.1 Å
  • R-Value Free: 0.387 
  • R-Value Work: 0.340 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the complete core of archaeal signal recognition particle and implications for interdomain communication

Rosendal, K.R.Wild, K.Montoya, G.Sinning, I.

(2003) Proc.Natl.Acad.Sci.USA 100: 14701-14706

  • DOI: 10.1073/pnas.2436132100
  • Primary Citation of Related Structures:  1QZX
  • Also Cited By: 3KL4

  • PubMed Abstract: 
  • Targeting of secretory and membrane proteins by the signal recognition particle (SRP) is evolutionarily conserved, and the multidomain protein SRP54 acts as the key player in SRP-mediated protein transport. Binding of a signal peptide to SRP54 at the ...

    Targeting of secretory and membrane proteins by the signal recognition particle (SRP) is evolutionarily conserved, and the multidomain protein SRP54 acts as the key player in SRP-mediated protein transport. Binding of a signal peptide to SRP54 at the ribosome is coordinated with GTP binding and subsequent complex formation with the SRP receptor. Because these functions are localized to distinct domains of SRP54, communication between them is essential. We report the crystal structures of SRP54 from the Archaeon Sulfolobus solfataricus with and without its cognate SRP RNA binding site (helix 8) at 4-A resolution. The two structures show the flexibility of the SRP core and the position of SRP54 relative to the RNA. A long linker helix connects the GTPase (G domain) with the signal peptide binding (M) domain, and a hydrophobic contact between the N and M domains relates the signal peptide binding site to the G domain. Hinge regions are identified in the linker between the G and M domains (292-LGMGD) and in the N-terminal part of the M domain, which allow for structural rearrangements within SRP54 upon signal peptide binding at the ribosome.


    Organizational Affiliation

    Biochemie-Zentrum Heidelberg, INF 328, D-69120 Heidelberg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Signal recognition 54 kDa protein
A, C, E, G
440Sulfolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2)Gene Names: srp54
Find proteins for Q97ZE7 (Sulfolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2))
Go to UniProtKB:  Q97ZE7
Entity ID: 1
MoleculeChainsLengthOrganism
7S RNAB,D,F,H47Sulfolobus solfataricus
Small Molecules
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
CCC
Query on CCC
B, D, F, H
RNA LINKINGC9 H13 N3 O10 P2C
GTP
Query on GTP
B, D, F, H
NON-POLYMERC10 H16 N5 O14 P3G
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.1 Å
  • R-Value Free: 0.387 
  • R-Value Work: 0.340 
  • Space Group: P 31
Unit Cell:
Length (Å)Angle (°)
a = 137.763α = 90.00
b = 137.763β = 90.00
c = 307.894γ = 120.00
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
CCP4data scaling
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-11-18
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance