Dear Shengyang

We'll be happy to help you sort this out. I suggest we discuss it between the two of us and then post a summary to the bulletin board.


Could you please tell me, privately not to the board, which gui you are using, which version of CCP4 and which options you are trying to select?


Best wishes


Dan


On 10/07/2019 09:00, Shengyang Jin wrote:
Dear all,

We recently acquired a data set (2.0 A, P222) for a coiled coil protein (according to Itasser, QUARK, Robetta, and Phaser). Matthews coefficient indicates 1 copy of protein per ASU. Sequence of the protein is quite novel with no apparent homolog in PDB. We tried to to MR with various models (ab initio or homology based) but with little success.

We then tried to use AMPLE, but in ccp4 it always returned this error:
__main__.py: error: unrecognized arguments: -use_arpwarp True
(if we untick arpwarp and choose buccaneer instead, it returns -use_arpwarp False)

Could anyone help?

Thank you very much.


Shengyang Jin
Nanyang Technological University
Singapore

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Prof Daniel Rigden
Institute of Integrative Biology
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