ISDA

Entry Detail

PDB ID:

4JRU

Keywords:

UNKNOWN FUNCTION

Title:

Structure of haze forming proteins in white wines: Vitis vinifera thaumatin-like proteins

Biological Source:

Source Organism:

Vitis vinifera

PDB Version:

Deposition Date:

2013-03-22

Release Date:

2014-04-02

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.20 Å

R-Value Free:

0.18

R-Value Work:

0.16

R-Value Observed:

0.16

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:thaumatin-like protein
Chain IDs:A
Chain Length:201
Number of Molecules:1
Biological Source:Vitis vinifera

UniProt ID:F6HUG9 Pfam ID:PF00314

Ligand Molecules

GOL

Primary Citation

Structure of Haze Forming Proteins in White Wines: Vitis vinifera Thaumatin-Like Proteins.

Marangon, M, Van Sluyter, S.C, Waters, E.J, Menz, R.I.Show

Plos One 9 e113757 e113757 (2014)

PMID: 25463627 DOI: 10.1371/journal.pone.0113757

Abstact

Grape thaumatin-like proteins (TLPs) play roles in plant-pathogen interactions and can cause protein haze in white wine unless removed prior to bottling. Different isoforms of TLPs have different hazing potential and aggregation behavior. Here we present the elucidation of the molecular structures of three grape TLPs that display different hazing potential. The three TLPs have very similar structures despite belonging to two different classes (F2/4JRU is a thaumatin-like protein while I/4L5H and H2/4MBT are VVTL1), and having different unfolding temperatures (56 vs. 62°C), with protein F2/4JRU being heat unstable and forming haze, while I/4L5H does not. These differences in properties are attributable to the conformation of a single loop and the amino acid composition of its flanking regions.

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