1DOI

2FE-2S FERREDOXIN FROM HALOARCULA MARISMORTUI


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Insights into protein adaptation to a saturated salt environment from the crystal structure of a halophilic 2Fe-2S ferredoxin.

Frolow, F.Harel, M.Sussman, J.L.Mevarech, M.Shoham, M.

(1996) Nat.Struct.Mol.Biol. 3: 452-458


  • PubMed Abstract: 
  • Haloarcula marismortui is an archaebacterium that flourishes in the world's saltiest body of water, the Dead Sea. The cytosol of this organism is a supersaturated salt solution in which proteins are soluble and active. The crystal structure of a 2Fe- ...

    Haloarcula marismortui is an archaebacterium that flourishes in the world's saltiest body of water, the Dead Sea. The cytosol of this organism is a supersaturated salt solution in which proteins are soluble and active. The crystal structure of a 2Fe-2S ferredoxin from H. marismortui determined at 1.9 A is similar to those of plant-type 2Fe-2S ferredoxins of known structure, with two important distinctions. The entire surface of the protein is coated with acidic residues except for the vicinity of the iron-sulphur cluster, and there is an insertion of two amphipathic helices near the N-terminus. These form a separate hyperacidic domain whose postulated function to provide extra surface carboxylates for solvation. These data and the fact that bound surface water molecules have on the average 40% more hydrogen bonds than in a typical non-halophilic protein crystal structure support the notion that haloadaptation involves better water binding capacity.


    Related Citations: 
    • Preliminary X-Ray Diffraction Studies on 2 Fe-Ferredoxin from Halobacterium of the Dead Sea
      Sussman, J.L.,Zipori, P.,Harel, M.,Yonath, A.,Werber, M.M.
      (1979) J.Mol.Biol. 134: 375
    • X-Ray Structural Studies of a Salt-Loving 2Fe-2S Ferredoxin from Halobacterium of the Dead Sea
      Sussman, J.L.,Brown, J.H.,Shoham, M.
      (1986) Iron-Sulfur Protein Research --: 69


    Organizational Affiliation

    Department of Structural Biology, The Weizmann Institute of Science, Rehovot, Israel.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
2FE-2S FERREDOXIN
A
128Haloarcula marismortui (strain ATCC 43049 / DSM 3752 / JCM 8966 / VKM B-1809)Gene Names: fer1
Find proteins for P00217 (Haloarcula marismortui (strain ATCC 43049 / DSM 3752 / JCM 8966 / VKM B-1809))
Go to UniProtKB:  P00217
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download SDF File 
Download CCD File 
A
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
FES
Query on FES

Download SDF File 
Download CCD File 
A
FE2/S2 (INORGANIC) CLUSTER
Fe2 S2
NIXDOXVAJZFRNF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Work: 0.195 
  • Space Group: P 63 2 2
Unit Cell:
Length (Å)Angle (°)
a = 59.180α = 90.00
b = 59.180β = 90.00
c = 124.230γ = 120.00
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORmodel building
X-PLORrefinement
XENGENdata reduction
XENGENdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-08-01
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance