2FFH

THE SIGNAL SEQUENCE BINDING PROTEIN FFH FROM THERMUS AQUATICUS

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.257 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history. 


Literature

Crystal structure of the signal sequence binding subunit of the signal recognition particle.

Keenan, R.J., Freymann, D.M., Walter, P., Stroud, R.M.

(1998) Cell 94: 181-191

  • DOI: https://doi.org/10.1016/s0092-8674(00)81418-x
  • Primary Citation of Related Structures:  
    2FFH

  • PubMed Abstract: 

    The crystal structure of the signal sequence binding subunit of the signal recognition particle (SRP) from Thermus aquaticus reveals a deep groove bounded by a flexible loop and lined with side chains of conserved hydrophobic residues. The groove defines a flexible, hydrophobic environment that is likely to contribute to the structural plasticity necessary for SRP to bind signal sequences of different lengths and amino acid sequence. The structure also reveals a helix-turn-helix motif containing an arginine-rich alpha helix that is required for binding to SRP RNA and is implicated in forming the core of an extended RNA binding surface.

    • Organizational Affiliation: 

    Department of Biochemistry and Biophysics, School of Medicine, University of California, San Francisco 94143-0448, USA.


Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PROTEIN (FFH)
A, B, C
425Thermus aquaticusMutation(s): 0 
EC: 3.6.5.4
UniProt
Find proteins for O07347 (Thermus aquaticus)
Explore O07347 
Go to UniProtKB:  O07347
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO07347
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
CD
Query on CD
Download Ideal Coordinates CCD File 
D [auth A]
E [auth A]
F [auth A]
G [auth A]
H [auth A]
D [auth A],
E [auth A],
F [auth A],
G [auth A],
H [auth A],
J [auth B],
K [auth B],
L [auth B],
M [auth B],
O [auth C],
P [auth C],
Q [auth C],
R [auth C],
S [auth C],
T [auth C],
U [auth C]
CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N
SO4
Query on SO4
Download Ideal Coordinates CCD File 
I [auth A],
N [auth B],
V [auth C]		SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.257 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 195.05α = 90
b = 195.05β = 90
c = 335.72γ = 120
Software Package:
Software NamePurpose
CCP4model building
RAVEmodel building
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CCP4phasing
RAVEphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-07-16
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-08-30
    Changes: Data collection, Database references, Derived calculations, Refinement description