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SAXSTER is a new algorithm to combine small-angle x-ray scattering (SAXS) data and threading for high-resolution protein structure determination. Given a query sequence, SAXSTER first generates a list of template alignments using the MUSTER threading program from the PDB library. The SAXS data will then be used to prioritize the best template alignments based on the SAXS profile match, which are finally used for full-length atomic protein structure construction. >> More about the server...

The input to the server includes a query sequence and a set of SAXS raw data. The output includes (An example for SAXSTER output for reciprocal space and for real space):

• Secondary structure prediction of the query protein;
• Top 10 threading templates and the alignments;
• Top 10 full-atomic models of the query protein;
• Top 10 SAXS profiles from templates structures.

Input 1: Query Sequence

Cut and paste your sequence here (in FASTA format):


Or upload the sequence from your local computer:

Input 2: SAXS Profile

You can input either p(r) in real space or I(q) in reciprocal space. If you upload both profiles, SAXSTER will generate the result according to the Option 1 (real space).

Option 1: Paste the SAXS Pair Distance Distribution Function p(r) here (in SAXSTER p(r) format):


Or upload the p(r) from your local computer:


Option 2: Paste the SAXS Intensity profile I(q) here (in SAXSTER I(q) format):


Or upload the I(q) from your local computer:

Output information:

Email: (mandatory, where results will be sent to)

ID: (optional, your given name of the protein)

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Reference:
M. dos Reis, R. Aparicio and Y. Zhang. Improving protein template recognition by using small angle X-ray scattering profiles. Biophysical Journal v101, 2770-2781 (2011).
download the pdf file