6G3S image
Entry Detail
PDB ID:
6G3S
Keywords:
Title:
Structure of tellurium-centred Anderson-Evans polyoxotungstate (TEW) bound to the nucleotide binding domain of HSP70. Second structure of two TEW-HSP70 structures deposited.
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2018-03-26
Release Date:
2018-10-17
Method Details:
Experimental Method:
Resolution:
2.30 Å
R-Value Free:
0.24
R-Value Work:
0.21
R-Value Observed:
0.21
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Heat shock 70 kDa protein 1A
Chain IDs:A
Chain Length:380
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation
The crystallization additive hexatungstotellurate promotes the crystallization of the HSP70 nucleotide binding domain into two different crystal forms.
PLoS ONE 13 e0199639 e0199639 (2018)
PMID: 29949628 DOI: 10.1371/journal.pone.0199639

Abstact

The use of the tellurium-centered Anderson-Evans polyoxotungstate [TeW6O24]6- (TEW) as a crystallization additive has been described. Here, we present the use of TEW as an additive in the crystallization screening of the nucleotide binding domain (NBD) of HSP70. Crystallization screening of the HSP70 NBD in the absence of TEW using a standard commercial screen resulted in a single crystal form. An identical crystallization screen of the HSP70 NBD in the presence of TEW resulted in both the "TEW free" crystal form and an additional crystal form with a different crystal packing. TEW binding was observed in both crystal forms, either as a well-defined molecule or in overlapping alternate positions suggesting translational disorder. The structures were solved by both molecular replacement and single wavelength anomalous diffraction (SAD) using the anomalous signal of a single bound molecule of TEW. This study adds one more example of TEW binding to a protein and influencing its crystallization behavior.

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