3H90

Structural basis for the autoregulation of the zinc transporter YiiP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.261 

wwPDB Validation   3D Report Full Report


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Literature

Structural basis for autoregulation of the zinc transporter YiiP.

Lu, M.Chai, J.Fu, D.

(2009) Nat Struct Mol Biol 16: 1063-1067

  • DOI: 10.1038/nsmb.1662
  • Primary Citation of Related Structures:  
    3H90

  • PubMed Abstract: 
  • Zinc transporters have crucial roles in cellular zinc homeostatic control. The 2.9-A resolution structure of the zinc transporter YiiP from Escherichia coli reveals a richly charged dimer interface stabilized by zinc binding. Site-directed fluorescence resonance energy transfer (FRET) measurements and mutation-activity analysis suggest that zinc binding triggers hinge movements of two electrically repulsive cytoplasmic domains pivoting around four salt bridges situated at the juncture of the cytoplasmic and transmembrane domains ...

    Zinc transporters have crucial roles in cellular zinc homeostatic control. The 2.9-A resolution structure of the zinc transporter YiiP from Escherichia coli reveals a richly charged dimer interface stabilized by zinc binding. Site-directed fluorescence resonance energy transfer (FRET) measurements and mutation-activity analysis suggest that zinc binding triggers hinge movements of two electrically repulsive cytoplasmic domains pivoting around four salt bridges situated at the juncture of the cytoplasmic and transmembrane domains. These highly conserved salt bridges interlock transmembrane helices at the dimer interface, where they are well positioned to transmit zinc-induced interdomain movements to reorient transmembrane helices, thereby modulating coordination geometry of the active site for zinc transport. The cytoplasmic domain of YiiP is a structural mimic of metal-trafficking proteins and the metal-binding domains of metal-transporting P-type ATPases. The use of this common structural module to regulate metal coordination chemistry may enable a tunable transport activity in response to cytoplasmic metal fluctuations.


    Organizational Affiliation

    Biology Department, Brookhaven National Laboratory, Upton, New York, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ferrous-iron efflux pump fieFA, B, C, D283Escherichia coli K-12Mutation(s): 0 
Gene Names: fieFyiiPb3915JW3886
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Cation Diffusion Facilitator (CDF) Family
Protein: 
YiiP Zinc Transporter
Find proteins for P69380 (Escherichia coli (strain K12))
Explore P69380 
Go to UniProtKB:  P69380
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HG
Query on HG

Download Ideal Coordinates CCD File 
E [auth A], F [auth A], K [auth B], L [auth B], Q [auth C], R [auth C], W [auth D], X [auth D]MERCURY (II) ION
Hg
BQPIGGFYSBELGY-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

Download Ideal Coordinates CCD File 
AA [auth D] , BA [auth D] , G [auth A] , H [auth A] , I [auth A] , J [auth A] , M [auth B] , N [auth B] , 
AA [auth D],  BA [auth D],  G [auth A],  H [auth A],  I [auth A],  J [auth A],  M [auth B],  N [auth B],  O [auth B],  P [auth B],  S [auth C],  T [auth C],  U [auth C],  V [auth C],  Y [auth D],  Z [auth D]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.261 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.657α = 90
b = 130.704β = 93.28
c = 115.757γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SHARPphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2009-04-29 
  • Released Date: 2009-09-08 
  • Deposition Author(s): Lu, M.

Revision History  (Full details and data files)

  • Version 1.0: 2009-09-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance