2ZUV

Crystal structure of Galacto-N-biose/Lacto-N-biose I phosphorylase in complex with GlcNAc, Ethylene glycol, and nitrate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.149 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The crystal structure of galacto-N-biose/lacto-N-biose I phosphorylase: A large deformation of a tim barrel scaffold

Hidaka, M.Nishimoto, M.Kitaoka, M.Wakagi, T.Shoun, H.Fushinobu, S.

(2009) J.Biol.Chem. 284: 7273-7283

  • DOI: 10.1074/jbc.M808525200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Galacto-N-biose/lacto-N-biose I phosphorylase (GLNBP) from Bifidobacterium longum, a key enzyme for intestinal growth, phosphorolyses galacto-N-biose and lacto-N-biose I with anomeric inversion. GLNBP homologues are often found in human pathogenic an ...

    Galacto-N-biose/lacto-N-biose I phosphorylase (GLNBP) from Bifidobacterium longum, a key enzyme for intestinal growth, phosphorolyses galacto-N-biose and lacto-N-biose I with anomeric inversion. GLNBP homologues are often found in human pathogenic and commensal bacteria, and their substrate specificities potentially define the nutritional acquisition ability of these microbes in their habitat. We report the crystal structures of GLNBP in five different ligand-binding forms. This is the first three-dimensional structure of glycoside hydrolase (GH) family 112. The GlcNAc- and GalNAc-bound forms provide structural insights into distinct substrate preferences of GLNBP and its homologues from pathogens. The catalytic domain consists of a partially broken TIM barrel fold that is structurally similar to a thermophilic beta-galactosidase, strongly supporting the current classification of GLNBP homologues as one of the GH families. Anion binding induces a large conformational change by rotating a half-unit of the barrel. This is an unusual example of molecular adaptation of a TIM barrel scaffold to substrates.


    Related Citations: 
    • Novel putative galactose operon involving lacto-N-biose phosphorylase in Bifidobacterium longum
      Kitaoka, M.,Tian, J.,Nishimoto, M.
      (2005) Appl.Environ.Microbiol. 71: 3158


    Organizational Affiliation

    Department of Biotechnology, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lacto-N-biose phosphorylase
A, B
759Bifidobacterium longum subsp. longum (strain ATCC 15707 / DSM 20219 / JCM 1217 / NCTC 11818 / E194b)Mutation(s): 0 
Gene Names: lnpA (lnbp)
EC: 2.4.1.211
Find proteins for E8MF13 (Bifidobacterium longum subsp. longum (strain ATCC 15707 / DSM 20219 / JCM 1217 / NCTC 11818 / E194b))
Go to UniProtKB:  E8MF13
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download SDF File 
Download CCD File 
A, B
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
NDG
Query on NDG

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Download CCD File 
A, B
2-(ACETYLAMINO)-2-DEOXY-A-D-GLUCOPYRANOSE
C8 H15 N O6
OVRNDRQMDRJTHS-PVFLNQBWSA-N
 Ligand Interaction
NO3
Query on NO3

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Download CCD File 
A, B
NITRATE ION
N O3
NHNBFGGVMKEFGY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.149 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 204.043α = 90.00
b = 68.020β = 108.79
c = 116.047γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
HKL-2000data scaling
DENZOdata reduction
SCALEPACKdata scaling
REFMACrefinement
HKL-2000data reduction
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-12-30
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-10-11
    Type: Advisory, Refinement description