Neutral invertase 2 from Arabidopsis thaliana

Experimental Data Snapshot

  • Resolution: 3.39 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.252 
  • R-Value Observed: 0.254 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history

Re-refinement Note

This entry reflects an alternative modeling of the original data in: 6SGQ


Crystal structure of Arabidopsis thaliana neutral invertase 2.

Tarkowski, L.P.Tsirkone, V.G.Osipov, E.M.Beelen, S.Lammens, W.Vergauwen, R.Van den Ende, W.Strelkov, S.V.

(2020) Acta Crystallogr F Struct Biol Commun 76: 152-157

  • DOI: https://doi.org/10.1107/S2053230X2000179X

  • PubMed Abstract: 

    The metabolism of sucrose is of crucial importance for life on Earth. In plants, enzymes called invertases split sucrose into glucose and fructose, contributing to the regulation of metabolic fluxes. Invertases differ in their localization and pH optimum. Acidic invertases present in plant cell walls and vacuoles belong to glycoside hydrolase family 32 (GH32) and have an all-β structure. In contrast, neutral invertases are located in the cytosol and organelles such as chloroplasts and mitochondria. These poorly understood enzymes are classified into a separate GH100 family. Recent crystal structures of the closely related neutral invertases InvA and InvB from the cyanobacterium Anabaena revealed a predominantly α-helical fold with unique features compared with other sucrose-metabolizing enzymes. Here, a neutral invertase (AtNIN2) from the model plant Arabidopsis thaliana was heterologously expressed, purified and crystallized. As a result, the first neutral invertase structure from a higher plant has been obtained at 3.4 Å resolution. The hexameric AtNIN2 structure is highly similar to that of InvA, pointing to high evolutionary conservation of neutral invertases.

  • Organizational Affiliation

    Molecular Plant Biology Laboratory, Department of Biology, KU Leuven, Kasteelpark Arenberg 31, 3000 Leuven, Belgium.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Alkaline/neutral invertase CINV1
A, B, C, D, E
A, B, C, D, E, F, G, H, I, J, K, L
551Arabidopsis thalianaMutation(s): 0 
Gene Names: CINV1INVGAt1g35580F15O4.33
Find proteins for Q9LQF2 (Arabidopsis thaliana)
Explore Q9LQF2 
Go to UniProtKB:  Q9LQF2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9LQF2
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.39 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.252 
  • R-Value Observed: 0.254 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 107.45α = 90
b = 186.708β = 104.86
c = 152.2γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling
PDB_EXTRACTdata extraction

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Research Foundation - Flanders (FWO)BelgiumG0A4915N

Revision History  (Full details and data files)

  • Version 1.0: 2020-03-11
    Type: Initial release
  • Version 1.1: 2020-03-18
    Changes: Database references
  • Version 1.2: 2024-01-24
    Changes: Data collection, Database references, Refinement description