Hi Saif,

If your goal is to perform co-crystallization, I am completely agreed with
David's suggestions. Delta Tm does matter in the co-crystallization but
that's not always the case.  I have some experience with protein complexes
where I successfully co-crystallized by using really high molar ratio of
substrate (1: 20, 1: 50, and even 1:200 given your substrate is not too
much expensive). Try some additives relevant to your system.

Good luck
Prem

On Thu, 25 Feb 2021, 08:56 Saif Mohd, <[email protected]> wrote:

> Hello everyone,
>
> 1) How much change in Tm (ΔTm) in a thermal shift assay is considered to
> be significant ?
>
> 2) A negative  ΔTm infers that the compound is making the protein
> unstable. In such a case, will the co-crystallization be difficult or just
> impossible or on the contrary it shouldn't matter much?
>
>
> Thanks and best regards,
> Saif
>
>
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