[phenixbb] real_space_correlation

[Pavel Afonine]

Hi Jianghai,

you will need to calculate this map fist and then use
    phenix.get_cc_mtz_pdb model.pdb map_coeffs.mtz
to get your CC.

Pavel

On 2/28/13 10:11 AM, Jianghai Zhu wrote:
> Hi Pavel,
>
> Is there a way in phenix to do what I wanted, i.e. calculate the real space cc between a model and a SA omit map?  Thanks.
>
> --Jianghai
>
>
>
> On Feb 28, 2013, at 12:56 PM, Pavel Afonine <pafonine at lbl.gov> wrote:
>
>> Hi Jianghai,
>>
>> when you run
>>
>>     phenix.real_space_correlation m.pdb d.mtz
>>
>> it will calculate and output map correlation coefficients (map CC) between two maps: map_1=Fmodel map and map_2=2mFo-DFmodel, where Fmodel = k_total * (Fcalc + Fbulk), and 2mFo-DFmodel is what's called sigmaa map. These maps are calculated using the model from input PDB file, and reflection data (Fobs or Iobs) and R-free-flags from input reflection file.
>>
>> You can define map_1 and map_2.
>>
>> Depending on data resolution, the map CC will be reported per individual atom or per entire residue.
>>
>> Pavel
>>
>> On 2/27/13 1:17 PM, Jianghai Zhu wrote:
>>> Hi All,
>>>
>>> I was trying to use "phenix.real_space_correlation *.pdb resolve_composite_map.mtz" to get some real space cc for my ligand against the SA composite omit map.  But I am not sure that the map used here was the SA composite omit map.  Will phenix use the omit map I provided or will it just simply calculate a sigmaA weighted 2Fo-Fc map based on the pdb?
>>>
>>> Thanks.
>>>
>>> --Jianghai
>>>
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