
I am new to SAXS, this is the first time of my atomic modeling, so maybe the questions I asked are really naive

I'm trying to assembly a two domain proteins, which have available structure of each two domains, and I've collected the SAXS data of full-length protein.
But now, I'm not really sure which software to use.
According to https://bmcstructbiol.biomedcentral.com ... 6807-12-17
the BUNCH program is designed specifically for the multi-domain assembly task, so I tried to use it but it didn't work. ( I'm not sure the reason, but I've put the .pdb or .seq file in the bin folder, but the pre-bunch answered me "not exist" and crash.
In the other hand, I tried to use FoXSDock and fitted two mono-domain in SAXS data to build full-length atomic model, but the SAXS X score is too high....(higher than 30...)
Please give me some ideas, or is there any protocol or practicing about assembling a multi-domain proteins from available mono-domain?
Thank you very much.