Re: [ccp4bb]: measure circumference

[Timm Maier <tmaier@chemie.fu-berlin.de>]

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> Jianghai Zhu wrote:
> > 
> > ***  For details on how to be removed from this list visit the  ***
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> > 
> > Ok, my dimer is not a perfect sphere. Let's say I want to wrap a rope
> > around my protein in a certain orientation. What word should I use for that
> > distance instead of circumference? And which program can measure that
> > distance?
> > 

> 
>  Many proteins deserve strangling, but give it a bit of leeway then
> tighten the rope..
> Eleanor
> 

If you want to wrap your rope in a certain, defined way around your
protein and you already know this "path" - why not approximating it with a
polygon ? Simply position enough dummy atoms / waters with equal
spacing along your path and sum up the bond length. It might be a
primitive way, but at least you can choose the precision yourself and you
will get a result after a few minutes working with "O"!

Best regards 

Timm

____________________________________________________________________________

                 TIMM MAIER
                           Proteinkristallographie
                           Institut fuer Kristallographie
                           Takustr.6
                           14195 Berlin

                           tmaier@chemie.fu-berlin.de                   
____________________________________________________________________________