[Avogadro-Discuss] UNL after using Fill Unit Cell

2017-04-23 Thread Nash, Anthony
Hi all,

I am trying to recreate the unit cell assemblage of 4z1r (visible using the PDB 
NGL viewer on the website).

After importing my structure and checking the unit cell dimensions, I set the 
space group (5 c 2y c 1 2 1 as determined using Maestro) then select “Fill Unit 
Cell”. Visually, everything looks good. But unfortunately, all means of 
identifying the atom and the corresponding residue is lost in the exported pdb 
and matching/replicated atoms as listed together rather than in their 
corresponding residue order. I plan on importing this into Gromacs, but in its 
current state the .pdb file is impossible to read.

E.g.,


HETATM1  N   UNL 1   3.631   3.685   8.676  1.00  0.00   N

HETATM2  N   UNL 2 165.943   3.685  16.225  1.00  0.00   N

HETATM3  N   UNL 3  89.418  10.655   8.676  1.00  0.00   N

HETATM4  N   UNL 4  80.156  10.655  16.225  1.00  0.00   N

HETATM5  C   UNL 5   4.854   4.502   8.763  1.00  0.00   C

HETATM6  C   UNL 6 164.720   4.502  16.138  1.00  0.00   C

HETATM7  C   UNL 7  90.640  11.472   8.763  1.00  0.00   C

HETATM8  C   UNL 8  78.933  11.472  16.138  1.00  0.00   C

HETATM9  C   UNL 9   6.049   3.864   8.047  1.00  0.00   C

HETATM   10  C   UNL10 163.525   3.864  16.854  1.00  0.00   C

HETATM   11  C   UNL11  91.836  10.833   8.047  1.00  0.00   C

HETATM   12  C   UNL12  77.738  10.833  16.854  1.00  0.00   C

HETATM   13  O   HOH13   5.956   2.719   7.616  1.00  0.00   O

HETATM   14  O   HOH14 163.618   2.719  17.285  1.00  0.00   O

HETATM   15  O   HOH15  91.743   9.688   7.616  1.00  0.00   O

HETATM   16  O   HOH16  77.831   9.688  17.285  1.00  0.00   O

Any idea how to fix this?

I’m beginning to think the only way around this would be to import my 
asymmetric unit structure into Gromacs, replicate the protein, identify the 
x,y,z location of a central atom from within Avogadro of one of the three 
replicated molecules, and perform some basic maths to translate the copies.

Thanks
Anthony

Dr Anthony Nash
Department of Chemistry
University College London

Skeletal Tissue Dynamics Group
Committee member of London Matrix Group @LondonMatrixGrp

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[Avogadro-Discuss] displaying multiple NBO orbitals

2015-05-23 Thread Nash, Anthony
Hi all,
Apologies if this has been covered before; I've looked but with no success.

I have loaded in my Gaussian formatted checkpoint file and I have identified 
the three NBOs involved in hydrogen bonding between an organic molecule and a 
single explicit water molecule. Unfortunately it seems that I can only display 
one orbital at anyone time. I wish to render the LP (the one of the two with 
the most interaction energy from the second order...) and the (O-H)* 
delocalised orbital.

Avogadro 1.1.1
QT version 4.8.6

Anthony advice is greatly appreciated. Thanks
Anthony


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[Avogadro-Discuss] HBond display can't change colours.

2015-02-13 Thread Nash, Anthony

Hi all,

Just installed Avogadro 1.1.1 app and lib version on Mac yosemite 10.10.1. 

Unless I am missing something very obvious I can't change hydrogen bonds to a 
different color. They always remain yellow even when I select custom color. I 
am able to change hydrogen bond width so I know the software can act on them. 

I have tried enabling and disabling hydrogen bonds between changing colours, I 
have even tried the other Colour by options with no change.

Any help would be appreciated. Thanks
Anthony

Dr Anthony Nash
Department of Chemistry
University College London
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