3OM7

Crystal structure of B. megaterium levansucrase mutant Y247W


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.86 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.201 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Polysaccharide Synthesis of the Levansucrase SacB from Bacillus megaterium Is Controlled by Distinct Surface Motifs.

Strube, C.P.Homann, A.Gamer, M.Jahn, D.Seibel, J.Heinz, D.W.

(2011) J Biol Chem 286: 17593-17600

  • DOI: https://doi.org/10.1074/jbc.M110.203166
  • Primary Citation of Related Structures:  
    3OM2, 3OM5, 3OM6, 3OM7

  • PubMed Abstract: 

    Despite the widespread biological function of carbohydrates, the polysaccharide synthesis mechanisms of glycosyltransferases remain largely unexplored. Bacterial levansucrases (glycoside hydrolase family 68) synthesize high molecular weight, β-(2,6)-linked levan from sucrose by transfer of fructosyl units. The kinetic and biochemical characterization of Bacillus megaterium levansucrase SacB variants Y247A, Y247W, N252A, D257A, and K373A reveal novel surface motifs remote from the sucrose binding site with distinct influence on the polysaccharide product spectrum. The wild type activity (k(cat)) and substrate affinity (K(m)) are maintained. The structures of the SacB variants reveal clearly distinguishable subsites for polysaccharide synthesis as well as an intact active site architecture. These results lead to a new understanding of polysaccharide synthesis mechanisms. The identified surface motifs are discussed in the context of related glycosyltransferases.


  • Organizational Affiliation

    Department of Molecular Structural Biology, Helmholtz-Centre for Infection Research, Inhoffenstrasse 7B, 38124 Braunschweig, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
LevansucraseA [auth C],
B [auth A],
C [auth B],
D
456Priestia megateriumMutation(s): 1 
Gene Names: sacB
EC: 2.4.1.10
UniProt
Find proteins for D5DC07 (Priestia megaterium (strain DSM 319 / IMG 1521))
Explore D5DC07 
Go to UniProtKB:  D5DC07
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupD5DC07
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
PGE
Query on PGE

Download Ideal Coordinates CCD File 
F [auth C],
M [auth A],
R [auth B],
U [auth D]
TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
PEG
Query on PEG

Download Ideal Coordinates CCD File 
N [auth A],
Q [auth B],
V [auth D]
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
SO4
Query on SO4

Download Ideal Coordinates CCD File 
G [auth C]
H [auth C]
J [auth A]
K [auth A]
L [auth A]
G [auth C],
H [auth C],
J [auth A],
K [auth A],
L [auth A],
P [auth B],
T [auth D]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
CA
Query on CA

Download Ideal Coordinates CCD File 
E [auth C],
I [auth A],
O [auth B],
S [auth D]
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.86 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.201 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.527α = 90
b = 100.052β = 90.51
c = 95.45γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
DNAdata collection
XDSdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-03-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2024-02-21
    Changes: Data collection, Database references, Derived calculations