[phenixbb] hydrogen-bond restraints for Watson-Crick base pairs

Jeff Headd jjheadd at lbl.gov
Tue Jun 22 15:41:32 PDT 2010


Hi Scott,

I'm not sure why that's not working, it looks to me to be formatted
correctly.  Could you send me (directly to my email, not the board) a
larger section of DNA that should have WC base pairs?  That will help
to trouble shoot what is going on.

Thanks,
Jeff

On Tue, Jun 22, 2010 at 3:17 PM, Scott Classen <sclassen at lbl.gov> wrote:
> Hi Nat,
>
> The Ad and * stuff comes from coot
>
> OK I renamed all my DNA residues and atom to the PDB version 3 "standard" Ad becomes DA and * becomes ' etc etc.
>
> HETATM    1  O5'  DA D   1     -47.740 -49.121 -17.972  1.00 91.44           O
> ANISOU    1  O5'  DA D   1    13002   6701  15042   3404   -258  -1747       O
> HETATM    2  C5'  DA D   1     -47.012 -48.219 -17.145  1.00 89.95           C
> ANISOU    2  C5'  DA D   1    12785   6488  14904   3328   -133  -1848       C
> HETATM    3  C4'  DA D   1     -45.570 -48.166 -17.612  1.00 87.82           C
> ANISOU    3  C4'  DA D   1    12704   6315  14346   3354    213  -1700       C
> HETATM    4  O4'  DA D   1     -45.517 -47.624 -18.952  1.00 85.51           O
> ANISOU    4  O4'  DA D   1    12694   6248  13549   3345     56  -1589       O
> HETATM    5  C3'  DA D   1     -44.642 -47.267 -16.812  1.00 88.97           C
> ANISOU    5  C3'  DA D   1    12860   6436  14508   3299    389  -1783       C
> HETATM    6  O3'  DA D   1     -43.312 -47.719 -17.004  1.00 87.64           O
> ANISOU    6  O3'  DA D   1    12793   6290  14216   3376    787  -1645       O
> HETATM    7  C2'  DA D   1     -44.883 -45.902 -17.456  1.00 88.06           C
> ANISOU    7  C2'  DA D   1    12951   6509  13998   3224     84  -1819       C
> HETATM    8  C1'  DA D   1     -45.055 -46.290 -18.922  1.00 86.43           C
> ANISOU    8  C1'  DA D   1    12944   6475  13420   3268     -4  -1650       C
> HETATM    9  N9   DA D   1     -46.030 -45.477 -19.640  1.00 88.99           N
> ANISOU    9  N9   DA D   1    13415   6923  13476   3202   -408  -1684       N
> HETATM   10  C8   DA D   1     -47.262 -45.061 -19.205  1.00 91.41           C
> ANISOU   10  C8   DA D   1    13632   7157  13943   3159   -766  -1828       C
> HETATM   11  N7   DA D   1     -47.919 -44.338 -20.086  1.00 91.51           N
> ANISOU   11  N7   DA D   1    13857   7306  13606   3115  -1076  -1814       N
> HETATM   12  C5   DA D   1     -47.057 -44.279 -21.180  1.00 89.60           C
> ANISOU   12  C5   DA D   1    13841   7242  12960   3112   -900  -1656       C
> HETATM   13  C4   DA D   1     -45.889 -44.979 -20.917  1.00 87.68           C
> ANISOU   13  C4   DA D   1    13517   6968  12828   3174   -500  -1580       C
> HETATM   14  N1   DA D   1     -46.108 -43.812 -23.301  1.00 83.38           N
> ANISOU   14  N1   DA D   1    13478   6809  11393   3063   -789  -1439       N
> HETATM   15  C2   DA D   1     -45.046 -44.522 -22.903  1.00 82.39           C
> ANISOU   15  C2   DA D   1    13235   6642  11427   3141   -430  -1387       C
> HETATM   16  N3   DA D   1     -44.840 -45.143 -21.741  1.00 83.98           N
> ANISOU   16  N3   DA D   1    13201   6650  12057   3203   -253  -1442       N
> HETATM   17  C6   DA D   1     -47.151 -43.666 -22.454  1.00 87.19           C
> ANISOU   17  C6   DA D   1    13821   7135  12171   3057  -1043  -1571       C
> HETATM   18  N6   DA D   1     -48.209 -42.954 -22.862  1.00 88.07           N
>
> Still no luck
>
>
>
> On Jun 22, 2010, at 3:03 PM, Nathaniel Echols wrote:
>
>> On Tue, Jun 22, 2010 at 2:56 PM, Scott Classen <sclassen at lbl.gov> wrote:
>> I set main.secondary_structure_restraints = True
>> and it appears that protein ss elements are found and added to the geo file, but watson crick pairs are not.
>>
>> My DNA looks like this:
>>
>> HETATM    1  O5*  Ad D   1     -47.740 -49.121 -17.972  1.00 91.44           O
>> ANISOU    1  O5*  Ad D   1    13002   6701  15042   3404   -258  -1747       O
>>
>> Is there any reason it wouldn't be recognized by PROBE?
>>
>> Jeff says that PROBE probably won't recognize "Ad" (it expects "dA" instead), and the default behavior probably requires O5', not O5*.  The atom naming we can probably work around, the residue names are more difficult.  What program generated these residues?
>>
>> If you can send us the model (or just enough of it to have base pairs, actually), we'll take a look.
>>
>> -Nat
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