1DOG

REFINED STRUCTURE FOR THE COMPLEX OF 1-DEOXYNOJIRIMYCIN WITH GLUCOAMYLASE FROM (ASPERGILLUS AWAMORI) VAR. X100 TO 2.4 ANGSTROMS RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Observed: 0.119 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Refined structure for the complex of 1-deoxynojirimycin with glucoamylase from Aspergillus awamori var. X100 to 2.4-A resolution.

Harris, E.M.Aleshin, A.E.Firsov, L.M.Honzatko, R.B.

(1993) Biochemistry 32: 1618-1626

  • DOI: https://doi.org/10.1021/bi00057a028
  • Primary Citation of Related Structures:  
    1DOG

  • PubMed Abstract: 

    The three-dimensional structure of the complex of 1-deoxynojirimycin with glucoamylase II-(471) from Aspergillus awamori var. X100 has been determined to 2.4-A resolution. The model includes residues corresponding to residues 1-471 of glucoamylase I from Aspergillus niger, two molecules of bound 1-deoxynojirimycin and 605 sites for water molecules. The crystallographic R factor from refinement is 0.119, and the root-mean-squared deviation in bond distances is 0.012 A. The inhibitor complex confirms the location of the active site in the packing void of the alpha/alpha-barrel as proposed by Aleshin et al. [Aleshin, A., Golubev, A., Firsov, L., & Honzatko, R. B. (1992) J. Biol. Chem. 267, 19291-19298]. One inhibitor molecule is associated with strong electron density and represents the principal site of interaction of 1-deoxynojirimycin with the enzyme. The other 1-deoxynojirimycin molecule is associated with weak electron density and therefore, probably represents a binding site of low affinity. Interactions of 1-deoxynojirimycin with the enzyme at its principal site involve Arg 45, Asp 55, Arg 305, and carbonyl 177. In addition, a water molecule (water 500) hydrogen bonds to Glu 400 and the 6-hydroxyl of 1-deoxynojirimycin and is at an approximate distance of 3.3 A from the "anomeric" carbon of the inhibitor. The structural arrangement of functional groups near the inhibitor molecule suggests that Glu 179 is a catalytic acid, Glu 400 a catalytic base, and water 500 the attacking nucleophile in the hydrolysis of maltooligosaccharides. The relevance of the X-ray work to proposed mechanisms of enzymatic hydrolysis of oligosaccharides is discussed.


  • Organizational Affiliation

    Department of Biochemistry and Biophysics, Iowa State University, Ames 50011.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
GLUCOAMYLASE-471470Aspergillus awamoriMutation(s): 0 
EC: 3.2.1.3
UniProt
Find proteins for P69327 (Aspergillus awamori)
Explore P69327 
Go to UniProtKB:  P69327
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP69327
Sequence Annotations
Expand
  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
B
5N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42227JK
GlyCosmos:  G42227JK
GlyGen:  G42227JK
Entity ID: 3
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-3)-alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
C
8N-Glycosylation
Glycosylation Resources
GlyTouCan:  G83582BK
GlyCosmos:  G83582BK
GlyGen:  G83582BK
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
MAN
Query on MAN

Download Ideal Coordinates CCD File 
D [auth A]
E [auth A]
F [auth A]
G [auth A]
H [auth A]
D [auth A],
E [auth A],
F [auth A],
G [auth A],
H [auth A],
I [auth A],
J [auth A],
K [auth A],
L [auth A],
M [auth A]
alpha-D-mannopyranose
C6 H12 O6
WQZGKKKJIJFFOK-PQMKYFCFSA-N
NOJ
Query on NOJ

Download Ideal Coordinates CCD File 
N [auth A],
O [auth A]
1-DEOXYNOJIRIMYCIN
C6 H13 N O4
LXBIFEVIBLOUGU-JGWLITMVSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
NOJ Binding MOAD:  1DOG Ki: 9.60e+4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Observed: 0.119 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 116.6α = 90
b = 103.6β = 90
c = 48.3γ = 90
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1994-01-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Derived calculations, Other
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Database references, Derived calculations, Structure summary