6GNF

Granule Bound Starch Synthase from Cyanobacterium sp. CLg1 bound to acarbose and ADP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.205 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal Structures of theCatalyticDomain ofArabidopsis thalianaStarch Synthase IV, of Granule Bound Starch Synthase From CLg1 and of Granule Bound Starch Synthase I ofCyanophora paradoxaIllustrate Substrate Recognition in Starch Synthases.

Nielsen, M.M.Ruzanski, C.Krucewicz, K.Striebeck, A.Cenci, U.Ball, S.G.Palcic, M.M.Cuesta-Seijo, J.A.

(2018) Front Plant Sci 9: 1138-1138

  • DOI: 10.3389/fpls.2018.01138
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Starch synthases (SSs) are responsible for depositing the majority of glucoses in starch. Structural knowledge on these enzymes that is available from the crystal structures of rice granule bound starch synthase (GBSS) and barley SSI provides incompl ...

    Starch synthases (SSs) are responsible for depositing the majority of glucoses in starch. Structural knowledge on these enzymes that is available from the crystal structures of rice granule bound starch synthase (GBSS) and barley SSI provides incomplete information on substrate binding and active site architecture. Here we report the crystal structures of the catalytic domains of SSIV from Arabidopsis thaliana , of GBSS from the cyanobacterium CLg1 and GBSSI from the glaucophyte Cyanophora paradoxa , with all three bound to ADP and the inhibitor acarbose. The SSIV structure illustrates in detail the modes of binding for both donor and acceptor in a plant SS. CLg1GBSS contains, in the same crystal structure, examples of molecules with and without bound acceptor, which illustrates the conformational changes induced upon acceptor binding that presumably precede catalytic activity. With structures available from several isoforms of plant and non-plant SSs, as well as the closely related bacterial glycogen synthases, we analyze, at the structural level, the common elements that define a SS, the elements that are necessary for substrate binding and singularities of the GBSS family that could underlie its processivity. While the phylogeny of the SSIII/IV/V has been recently discussed, we now further report the detailed evolutionary history of the GBSS/SSI/SSII type of SSs enlightening the origin of the GBSS enzymes used in our structural analysis.


    Organizational Affiliation

    Carlsberg Research Laboratory, Copenhagen, Denmark.,UMR8576 CNRS-USTL, Unité de Glycobiologie Structurale et Fonctionnelle, Université des Sciences et Technologies de Lille, Villeneuve-d'Ascq, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glycogen synthase
A, B, C
544Cyanobacterium sp. CLg1Mutation(s): 0 
Gene Names: glgA
EC: 2.4.1.21
Find proteins for V5SNJ5 (Cyanobacterium sp. CLg1)
Go to UniProtKB:  V5SNJ5
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
QPS
Query on QPS

Download SDF File 
Download CCD File 
A, C
BETA-ACARBOSE
4,6-dideoxy-4-{[(1S,4R,5S,6S)-4,5,6-trihydroxy-3-(hydroxymethyl)cyclohex-2-en-1-yl]amino}-alpha-D-glucopyranosyl-(1->4)-alpha-D-glucopyranosyl-(1->4)-beta-D-glucopyranose
C25 H43 N O18
XUFXOAAUWZOOIT-SXARVLRPSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
ADP
Query on ADP

Download SDF File 
Download CCD File 
A, B, C
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
GLC
Query on GLC

Download SDF File 
Download CCD File 
B
ALPHA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-DVKNGEFBSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.205 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 194.260α = 90.00
b = 132.650β = 126.30
c = 123.690γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
XSCALEdata scaling
REFMACrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Denmark--

Revision History 

  • Version 1.0: 2018-07-25
    Type: Initial release
  • Version 1.1: 2018-08-29
    Type: Data collection, Database references