Hi Thomas, Since Chimera allows you to change bond lengths and torsion angles, it would seem that just as a matter of completeness it should allow you to change bond angles as well. So despite that not being a commonplace desire, I will add it to my to-do list and open a feature- request ticket in our Trac database with you on the recipient list so you'll know when it gets implemented. It may take awhile (there's a request for chirality inversion in front of it), but it'll get done eventually. --Eric P.S. In case you didn't know, you can set bond lengths in the "Adjust Bonds" tab of the Build Structure tool. On Apr 19, 2011, at 9:55 AM, Thomas Mitterfellner wrote:
Hello!
My question is: it possible not just to measure but to change the angle between three atoms (e.g. A1 and A2 fixed, A3 rotated in the plane spanned by A1-A2-A3 with radius A2-A3)?
What I really like in Chimera (and miss in other molecular modelling software) is the possibility to move/rotate only the atoms selected, which is great e.g. for pre-aligning two molecular fragments when modelling transition states.
I know chimera is actually rather intended to be used for large molecules but it could be a great tool for modifying/building structures if only it was easier to modify structural parameters like bond lengths, angles and torsions (which I saw is possible).
Kind regards,
Thomas Mitterfellner
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