PuSH - Publication Server of Helmholtz Zentrum München: Optimization of protein buffer cocktails using Thermofluor.

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Reinhard, L.* ; Mayerhofer, H.* ; Geerlof, A. ; Müller-Dieckmann, J.* ; Weiss, M.S.*

Optimization of protein buffer cocktails using Thermofluor.

Acta Crystallogr. F-Struct. Biol. Cryst. Commun. 69, 209-214 (2013)

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The stability and homogeneity of a protein sample is strongly influenced by the composition of the buffer that the protein is in. A quick and easy approach to identify a buffer composition which increases the stability and possibly the conformational homogeneity of a protein sample is the fluorescence-based thermal-shift assay (Thermofluor). Here, a novel 96-condition screen for Thermofluor experiments is presented which consists of buffer and additive parts. The buffer screen comprises 23 different buffers and the additive screen includes small-molecule additives such as salts and nucleotide analogues. The utilization of small-molecule components which increase the thermal stability of a protein sample frequently results in a protein preparation of higher quality and quantity and ultimately also increases the chances of the protein crystallizing.

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