1CLV

YELLOW MEAL WORM ALPHA-AMYLASE IN COMPLEX WITH THE AMARANTH ALPHA-AMYLASE INHIBITOR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.161 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Specific inhibition of insect alpha-amylases: yellow meal worm alpha-amylase in complex with the amaranth alpha-amylase inhibitor at 2.0 A resolution.

Pereira, P.J.Lozanov, V.Patthy, A.Huber, R.Bode, W.Pongor, S.Strobl, S.

(1999) Structure Fold.Des. 7: 1079-1088

  • Also Cited By: 4BFH

  • PubMed Abstract: 
  • alpha-Amylases constitute a family of enzymes that catalyze the hydrolysis of alpha-D-(1,4)-glucan linkages in starch and related polysaccharides. The Amaranth alpha-amylase inhibitor (AAI) specifically inhibits alpha-amylases from insects, but not f ...

    alpha-Amylases constitute a family of enzymes that catalyze the hydrolysis of alpha-D-(1,4)-glucan linkages in starch and related polysaccharides. The Amaranth alpha-amylase inhibitor (AAI) specifically inhibits alpha-amylases from insects, but not from mammalian sources. AAI is the smallest proteinaceous alpha-amylase inhibitor described so far and has no known homologs in the sequence databases. Its mode of inhibition of alpha-amylases was unknown until now.


    Organizational Affiliation

    Max-Planck-Institut für Biochemie Am Klopferspitz 18a, 82152, Planegg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (ALPHA-AMYLASE)
A
471Tenebrio molitorMutation(s): 0 
EC: 3.2.1.1
Find proteins for P56634 (Tenebrio molitor)
Go to UniProtKB:  P56634
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (ALPHA-AMYLASE INHIBITOR)
I
32Amaranthus hypochondriacusMutation(s): 0 
Gene Names: AAI
Find proteins for P80403 (Amaranthus hypochondriacus)
Go to UniProtKB:  P80403
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PCA
Query on PCA
A
L-PEPTIDE LINKINGC5 H7 N O3GLU
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
AAIKd: 1 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.161 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 119.250α = 90.00
b = 119.250β = 90.00
c = 64.780γ = 120.00
Software Package:
Software NamePurpose
DENZOdata reduction
X-PLORrefinement
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-05-03
    Type: Initial release
  • Version 1.1: 2007-10-16
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance