1NZA

Divalent cation tolerance protein (Cut A1) from thermus thermophilus HB8


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.229 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The structures of the CutA1 proteins from Thermus thermophilus and Pyrococcus horikoshii: characterization of metal-binding sites and metal-induced assembly.

Bagautdinov, B.

(2014) Acta Crystallogr.,Sect.F 70: 404-413

  • DOI: 10.1107/S2053230X14003422
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • CutA1 (copper tolerance A1) is a widespread cytoplasmic protein found in archaea, bacteria, plants and animals, including humans. In Escherichia coli it is implicated in divalent metal tolerance, while the mammalian CutA1 homologue has been proposed ...

    CutA1 (copper tolerance A1) is a widespread cytoplasmic protein found in archaea, bacteria, plants and animals, including humans. In Escherichia coli it is implicated in divalent metal tolerance, while the mammalian CutA1 homologue has been proposed to mediate brain enzyme acetylcholinesterase activity and copper homeostasis. The X-ray structures of CutA1 from the thermophilic bacterium Thermus thermophilus (TtCutA1) with and without bound Na(+) at 1.7 and 1.9 Å resolution, respectively, and from the hyperthermophilic archaeon Pyrococcus horikoshii (PhCutA1) in complex with Na(+) at 1.8 Å resolution have been determined. Both are short and rigid proteins of about 12 kDa that form intertwined compact trimers in the crystal and solution. The main difference in the structures is a wide-type β-bulge on top of the TtCutA1 trimer. It affords a mechanism for lodging a single-residue insertion in the middle of β2 while preserving the interprotomer main-chain hydrogen-bonding network. The liganded forms of the proteins provide new structural information about the metal-binding sites and CutA1 assembly. The Na(+)-TtCutA1 structure unveils a dodecameric assembly with metal ions in the trimer-trimer interfaces and the lateral clefts of the trimer. For Na(+)-PhCutA1, the metal ion associated with six waters in an octahedral geometry. The structures suggest that CutA1 may contribute to regulating intracellular metal homeostasis through various binding modes.


    Organizational Affiliation

    Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), 1-1-1 Kouto, Sayo, Hyogo 679-5198, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Divalent cation tolerance protein
A
103Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579)Mutation(s): 0 
Gene Names: cutA
Find proteins for Q7SIA8 (Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579))
Go to UniProtKB:  Q7SIA8
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

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A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

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A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CL
Query on CL

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Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

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A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.229 
  • Space Group: I 2 3
Unit Cell:
Length (Å)Angle (°)
a = 83.003α = 90.00
b = 83.003β = 90.00
c = 83.003γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
SCALEPACKdata scaling
HKL-2000data reduction
HKL-2000data collection
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-03-11
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2014-05-07
    Type: Database references