Re: [ccp4bb] CC(1/2) reference

[Fislage, Marcus]

Hi Nicola,


maybe you want to have a look at an older thread I started years ago:


https://www.mail-archive.com/ccp4bb@jiscmail.ac.uk/msg28031.html

[ccp4bb] CC1/2, XDS and resolution cut off - The Mail 
Archive<https://www.mail-archive.com/ccp4bb@jiscmail.ac.uk/msg28031.html>
www.mail-archive.com
Dear all, We have in our lab a data set collected and are discussing where to 
cut the resolution for refinement. According to the work of Kai Diederichs and 
Andy ...




And especially the response from Kay Diederich


https://www.mail-archive.com/ccp4bb@jiscmail.ac.uk/msg28042.html


Cheers

Marcus

Re: [ccp4bb] CC1/2, XDS and resolution cut 
off<https://www.mail-archive.com/ccp4bb@jiscmail.ac.uk/msg28042.html>
www.mail-archive.com
Dear Marcus, I have a few comments: - we do not suggest any fixed value (like 
0.125) for a CC1/2 cutoff. One reason why a fixed value should not be carved in 
stone is ...




Marcus Fislage, PhD

Howard Hughes Medical Institute (HHMI)
Columbia University
Department of Biochemistry and Biophysics
Lab of Joachim Frank
New York, NY

email address: mf2...@cumc.columbia.edu
Phone: 212.305.9524
Fax: 212.305.9500


From: CCP4 bulletin board  on behalf of Parthasarathy 
Sampathkumar 
Sent: Tuesday, August 29, 2017 10:16:10 AM
To: CCP4BB@JISCMAIL.AC.UK
Subject: Re: [ccp4bb] CC(1/2) reference

Hi Nicola,

Here are references for CC1/2;

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3457925/


https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4684713/

Best Wishes
Partha
On Tue, Aug 29, 2017 at 10:06 AM Nicola Evans 
mailto:nicola.1.ev...@kcl.ac.uk>> wrote:
Hello all, I have heard at several CCP4 meetings and also at Diamond training 
that a good "cut off" for CC(1/2) is around 0.3 and I/sig(I) is 0.2, but I am 
struggling to find any journal references to say this (other than demonstrating 
the merits of CC(1/2) over Rmeas).

Can anyone point me in the right direction? Thanks all!

Nicola

Re: [ccp4bb] CC(1/2) reference

[Savvas Savvides]

Dear Nicola
the most thorough discussion I have seen regarding recommendations on cutoffs 
(or at least ways to think about them) for such crystallographic data 
indicators can be found in:

Assessing and maximizing data quality in macromolecular crystallography
P Andrew Karplus and Kay Diederichs
Current Opinion in Structural Biology 2015, 34:60–68
http://dx.doi.org/10.1016/j.sbi.2015.07.003 

best wishes
Savvas



Savvas Savvides
VIB-UGent Center for Inflammation Research
Dept. Biochemistry & Microbiology, Ghent University
Technologiepark 927, B-9052 Ghent (Zwijnaarde), Belgium
+32 (0)472 928 519 (mobile) ; +32 9 331 36 60 (office) ; Skype: 
savvas.savvides_skype
http://www.vib.be/en/research/scientists/Pages/Savvas-Savvides-Lab.aspx 




> On 29 Aug 2017, at 16:05, Nicola Evans  wrote:
> 
> Hello all, I have heard at several CCP4 meetings and also at Diamond training 
> that a good "cut off" for CC(1/2) is around 0.3 and I/sig(I) is 0.2, but I am 
> struggling to find any journal references to say this (other than 
> demonstrating the merits of CC(1/2) over Rmeas). 
> 
> Can anyone point me in the right direction? Thanks all!
> 
> Nicola

Re: [ccp4bb] CC(1/2) reference

[Parthasarathy Sampathkumar]

Hi Nicola,

Here are references for CC1/2;

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3457925/


https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4684713/

Best Wishes
Partha
On Tue, Aug 29, 2017 at 10:06 AM Nicola Evans 
wrote:

> Hello all, I have heard at several CCP4 meetings and also at Diamond
> training that a good "cut off" for CC(1/2) is around 0.3 and I/sig(I) is
> 0.2, but I am struggling to find any journal references to say this (other
> than demonstrating the merits of CC(1/2) over Rmeas).
>
> Can anyone point me in the right direction? Thanks all!
>
> Nicola
>

[ccp4bb] CC(1/2) reference

[Nicola Evans]

Hello all, I have heard at several CCP4 meetings and also at Diamond training 
that a good "cut off" for CC(1/2) is around 0.3 and I/sig(I) is 0.2, but I am 
struggling to find any journal references to say this (other than demonstrating 
the merits of CC(1/2) over Rmeas). 

Can anyone point me in the right direction? Thanks all!

Nicola