3PSH

Classification of a Haemophilus influenzae ABC transporter HI1470/71 through its cognate molybdate periplasmic binding protein MolA (MolA bound to Molybdate)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.317 
  • R-Value Work: 0.295 
  • R-Value Observed: 0.298 

wwPDB Validation   3D Report Full Report


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Literature

Classification of a Haemophilus influenzae ABC Transporter HI1470/71 through Its Cognate Molybdate Periplasmic Binding Protein, MolA.

Tirado-Lee, L.Lee, A.Rees, D.C.Pinkett, H.W.

(2011) Structure 19: 1701-1710

  • DOI: 10.1016/j.str.2011.10.004
  • Primary Citation of Related Structures:  
    3PSH, 3PSA

  • PubMed Abstract: 
  • molA (HI1472) from H. influenzae encodes a periplasmic binding protein (PBP) that delivers substrate to the ABC transporter MolB(2)C(2) (formerly HI1470/71). The structures of MolA with molybdate and tungstate in the binding pocket were solved to 1.6 and 1 ...

    molA (HI1472) from H. influenzae encodes a periplasmic binding protein (PBP) that delivers substrate to the ABC transporter MolB(2)C(2) (formerly HI1470/71). The structures of MolA with molybdate and tungstate in the binding pocket were solved to 1.6 and 1.7 Å resolution, respectively. The MolA-binding protein binds molybdate and tungstate, but not other oxyanions such as sulfate and phosphate, making it the first class III molybdate-binding protein structurally solved. The ∼100 μM binding affinity for tungstate and molybdate is significantly lower than observed for the class II ModA molybdate-binding proteins that have nanomolar to low micromolar affinity for molybdate. The presence of two molybdate loci in H. influenzae suggests multiple transport systems for one substrate, with molABC constituting a low-affinity molybdate locus.


    Organizational Affiliation

    Department of Molecular Biosciences, Northwestern University, Evanston, IL 60208, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
protein HI_1472A326Haemophilus influenzaeMutation(s): 0 
Gene Names: HI1472HI_1472
Find proteins for P44206 (Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd))
Explore P44206 
Go to UniProtKB:  P44206
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MOO
Query on MOO

Download Ideal Coordinates CCD File 
B [auth A]MOLYBDATE ION
Mo O4
MEFBJEMVZONFCJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.317 
  • R-Value Work: 0.295 
  • R-Value Observed: 0.298 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 123.295α = 90
b = 123.295β = 90
c = 103.037γ = 120
Software Package:
Software NamePurpose
SHELXphasing
REFMACrefinement
PDB_EXTRACTdata extraction
ADSCdata collection
MOSFLMdata reduction
SCALAdata scaling
SHELXDphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-11-30
    Type: Initial release