Input model: All structural models to be assembled must be provided in PDB format files and compressed into a single archive file (e.g., *.tar.gz, *.zip, *.tar, or *.tar.bz2). You may submit either a single complex model (See NOTE4) or multiple individual chain models for assembly. For complex model submissions, the server will automatically separate the structure into individual chains before reassembling them into the final complex.

NOTE1: Do not place all the chain structure files into a single folder and then compress that folder. Instead, compress all the PDB files directly into one archive.

NOTE2: If users only have sequences, they are advised to submit individual chain sequences to structure prediction servers such as AlphaFold3 or D-I-TASSER to obtain predicted structures.

NOTE3: Users can choose to input double-stranded DNA/RNA as a single PDB file, in which case the algorithm treats it as a rigid body to conserve base pairing during model construction.

NOTE4: The user-submitted PDB file must not contain residue numbering conflicts within the same chain ID in a single file.

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