4DJ0: Thaumatin I By Langmuir-Blodgett Hanging Drop Method At 1.98a Resolution For Unique Water Distribution

Citation:
Abstract
Langmuir-Blodgett films when used as nanotemplates for crystallization often leads to marked changes in protein stability and structure. Earlier we found that stability of proteins is also correlated with aqueous surroundings in the crystals. Here we study the direct relationships between presence of LB nanotemplates and unique patterns of water molecules surrounding the protein, for four model proteins for which 3D structures are available, and where crystallization conditions for each protein are the same except the presence of LB nanotemplate. Shape of frequency distribution of volumes occupied by water molecules were analyzed. They were found to be different between "classical" samples of different proteins, but surprisingly quite similar for LB samples. Volumes occupied by each water molecule as the function of the distance of the given molecule from the protein surface were studied. Introduction of LB film leads to appearance of water molecules close to protein surface but occupying large volumes. These findings confirm earlier experimental findings on the role of water molecules in determining protein stability and thereby pointing to water as a possible candidate for differences apparent in LB crystal stability against radiation.
PDB ID: 4DJ0Download
MMDB ID: 101338
PDB Deposition Date: 2012/2/1
Updated in MMDB: 2012/11
Experimental Method:
x-ray diffraction
Resolution: 1.98  Å
Source Organism:
Similar Structures:
Biological Unit for 4DJ0: monomeric; determined by author and by software (PISA)
Molecular Components in 4DJ0
Label Count Molecule
Protein (1 molecule)
1
Thaumatin I
Molecule annotation
* Click molecule labels to explore molecular sequence information.

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