3L8H

Crystal Structure of D,D-heptose 1.7-bisphosphate phosphatase from B. bronchiseptica complexed with magnesium and phosphate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.68 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.172 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural Determinants of Substrate Recognition in the HAD Superfamily Member d-glycero-d-manno-Heptose-1,7-bisphosphate Phosphatase (GmhB) .

Nguyen, H.H.Wang, L.Huang, H.Peisach, E.Dunaway-Mariano, D.Allen, K.N.

(2010) Biochemistry 49: 1082-1092

  • DOI: 10.1021/bi902019q
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The haloalkanoic acid dehalogenase (HAD) enzyme superfamily is the largest family of phosphohydrolases. In HAD members, the structural elements that provide the binding interactions that support substrate specificity are separated from those that orc ...

    The haloalkanoic acid dehalogenase (HAD) enzyme superfamily is the largest family of phosphohydrolases. In HAD members, the structural elements that provide the binding interactions that support substrate specificity are separated from those that orchestrate catalysis. For most HAD phosphatases, a cap domain functions in substrate recognition. However, for the HAD phosphatases that lack a cap domain, an alternate strategy for substrate selection must be operative. One such HAD phosphatase, GmhB of the HisB subfamily, was selected for structure-function analysis. Herein, the X-ray crystallographic structures of Escherichia coli GmhB in the apo form (1.6 A resolution), in a complex with Mg(2+) and orthophosphate (1.8 A resolution), and in a complex with Mg(2+) and d-glycero-d-manno-heptose 1beta,7-bisphosphate (2.2 A resolution) were determined, in addition to the structure of Bordetella bronchiseptica GmhB bound to Mg(2+) and orthophosphate (1.7 A resolution). The structures show that in place of a cap domain, the GmhB catalytic site is elaborated by three peptide inserts or loops that pack to form a concave, semicircular surface around the substrate leaving group. Structure-guided kinetic analysis of site-directed mutants was conducted in parallel with a bioinformatics study of sequence diversification within the HisB subfamily to identify loop residues that serve as substrate recognition elements and that distinguish GmhB from its subfamily counterpart, the histidinol-phosphate phosphatase domain of HisB. We show that GmhB and the histidinol-phosphate phosphatase domain use the same design of three substrate recognition loops inserted into the cap domain yet, through selective residue usage on the loops, have achieved unique substrate specificity and thus novel biochemical function.


    Organizational Affiliation

    Department of Physiology and Biophysics, Boston University School of Medicine, Boston, Massachusetts 02118-2394, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Putative haloacid dehalogenase-like hydrolase
A, B, C, D
179Bordetella bronchiseptica (strain ATCC BAA-588 / NCTC 13252 / RB50)Mutation(s): 0 
EC: 3.1.3.82
Find proteins for Q7WG29 (Bordetella bronchiseptica (strain ATCC BAA-588 / NCTC 13252 / RB50))
Go to UniProtKB:  Q7WG29
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FX1
Query on FX1

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C
beta-D-threo-hexo-2,4-diulo-2,5-furanose
C6 H10 O6
LAWYCIPOFYQBDZ-PQLUHFTBSA-N
 Ligand Interaction
PO4
Query on PO4

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A, B, C, D
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
ZN
Query on ZN

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A, B, C, D
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
FMT
Query on FMT

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A, D
FORMIC ACID
C H2 O2
BDAGIHXWWSANSR-UHFFFAOYSA-N
 Ligand Interaction
SAR
Query on SAR

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D
SARCOSINE
C3 H7 N O2
FSYKKLYZXJSNPZ-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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A, B, C, D
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.68 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.172 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 38.072α = 90.48
b = 58.389β = 97.54
c = 85.724γ = 92.02
Software Package:
Software NamePurpose
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
PHENIXphasing
PHENIXrefinement
HKL-2000data reduction
CBASSdata collection
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-02-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2011-10-05
    Type: Structure summary
  • Version 1.3: 2017-11-01
    Type: Refinement description