4LRF

Phosphopentomutase S154G variant soaked with ribose 5-phosphate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.163 
  • R-Value Observed: 0.165 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 2.1 of the entry. See complete history


Literature

Bioretrosynthetic construction of a didanosine biosynthetic pathway.

Birmingham, W.R.Starbird, C.A.Panosian, T.D.Nannemann, D.P.Iverson, T.M.Bachmann, B.O.

(2014) Nat Chem Biol 10: 392-399

  • DOI: https://doi.org/10.1038/nchembio.1494
  • Primary Citation of Related Structures:  
    4LR7, 4LR8, 4LR9, 4LRA, 4LRB, 4LRC, 4LRD, 4LRE, 4LRF

  • PubMed Abstract: 

    Concatenation of engineered biocatalysts into multistep pathways markedly increases their utility, but the development of generalizable assembly methods remains a major challenge. Herein we evaluate 'bioretrosynthesis', which is an application of the retrograde evolution hypothesis, for biosynthetic pathway construction. To test bioretrosynthesis, we engineered a pathway for synthesis of the antiretroviral nucleoside analog didanosine (2',3'-dideoxyinosine). Applying both directed evolution- and structure-based approaches, we began pathway construction with a retro-extension from an engineered purine nucleoside phosphorylase and evolved 1,5-phosphopentomutase to accept the substrate 2,3-dideoxyribose 5-phosphate with a 700-fold change in substrate selectivity and threefold increased turnover in cell lysate. A subsequent retrograde pathway extension, via ribokinase engineering, resulted in a didanosine pathway with a 9,500-fold change in nucleoside production selectivity and 50-fold increase in didanosine production. Unexpectedly, the result of this bioretrosynthetic step was not a retro-extension from phosphopentomutase but rather the discovery of a fortuitous pathway-shortening bypass via the engineered ribokinase.


  • Organizational Affiliation

    1] Department of Pharmacology, Vanderbilt University Medical Center, Nashville, Tennessee, USA. [2].


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Phosphopentomutase
A, B, C
416Bacillus cereusMutation(s): 1 
Gene Names: BC_4087deoB
EC: 5.4.2.7
UniProt
Find proteins for Q818Z9 (Bacillus cereus (strain ATCC 14579 / DSM 31 / CCUG 7414 / JCM 2152 / NBRC 15305 / NCIMB 9373 / NCTC 2599 / NRRL B-3711))
Explore Q818Z9 
Go to UniProtKB:  Q818Z9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ818Z9
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
HSX
Query on HSX

Download Ideal Coordinates CCD File 
I [auth A],
J [auth A]
5-O-phosphono-alpha-D-ribofuranose
C5 H11 O8 P
KTVPXOYAKDPRHY-AIHAYLRMSA-N
GOL
Query on GOL

Download Ideal Coordinates CCD File 
H [auth A],
P [auth B]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
MN
Query on MN

Download Ideal Coordinates CCD File 
D [auth A]
E [auth A]
F [auth A]
G [auth A]
K [auth B]
D [auth A],
E [auth A],
F [auth A],
G [auth A],
K [auth B],
L [auth B],
M [auth B],
N [auth B],
O [auth B],
Q [auth C],
R [auth C],
S [auth C]
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
TPO
Query on TPO
A, B, C
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.163 
  • R-Value Observed: 0.165 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 90.922α = 90
b = 76.77β = 108.72
c = 107.53γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
CNSrefinement
HKL-2000data reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-07-31
    Type: Initial release
  • Version 1.1: 2014-03-26
    Changes: Database references
  • Version 1.2: 2014-04-09
    Changes: Database references
  • Version 1.3: 2014-04-30
    Changes: Database references
  • Version 1.4: 2019-07-17
    Changes: Advisory, Data collection, Derived calculations, Refinement description
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Database references, Derived calculations
  • Version 2.1: 2023-09-20
    Changes: Advisory, Data collection, Database references, Refinement description, Structure summary