Sorry, I think the answer is on Colin's reply.

Best wishes, Jon Cooper.
jon.b.coo...@protonmail.com

Sent from Proton Mail Android

-------- Original Message --------
On 26/09/2024 17:56, Jon Cooper wrote:

> Another thing I am curious about is how a map can look good at 5.5 sigma 
> because an X-ray one probably wouldn't unless it was atomic resolution. Don't 
> worry if there isn't a simple explanation.
>
> Best wishes, Jon Cooper.
> jon.b.coo...@protonmail.com
>
> Sent from Proton Mail Android
>
> -------- Original Message --------
> On 26/09/2024 11:13, anna anna  wrote:
>
>> Dear all,
>> I am depositing my first cryoEM structure and I am facing the following 
>> problem concerning the contour level of the map.
>>
>> Briefly, where do I find the value for the contour level to associate to the 
>> uploaded map in Coot?
>>
>> Long story: I worked with coot and I am happy with my map when I set the 
>> contour level at 0.115 V = 5.5 rmsd (actually "happy" is not the best 
>> definition, I feel quite uncomfortable with this "by feeling" assignment 
>> but, to what I understood, this is how it works...).
>> Upon deposition, when I upload maps, a contour level is required but the 
>> values from coot are not accepted, I have to provide the contour level 
>> relative to the map value, like the one that you set in Chimera. Thus I 
>> opened the map in Chimera and I set a contour level "by eye" but the 
>> validation report revealed some problems: the total volume of the map is too 
>> low and too many residues are highlighted as out of density. Probably I 
>> should low the contour level but I don't want to go for a trial-and-error 
>> approach, there must be a way to convert the contour level from coot (the 
>> one that I used for modelling) in the one required for deposition!
>>
>> Any advice?
>>
>> Thank you,
>> Anna
>>
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