Great work, Rolf. Here are three important questions:

1) Currently Jmol identifies a protein residue as a group that contains 
N, CA, and C and either O or O1.

Q: Is this still viable with the remediated set?

It would be good to have specific examples of the following changes, and 
to know how many structures show these changes:

C    C1
C    C2
C    CA
C    CB

CA    C1
CA    C2
CA    CH3

N    N6
N    OXT

O    C
O    CA
O    CB
O    H1
O    N
O    O8
O    OXT
O1    OD

3HH3    C
O    C
UNK    C
C    CA
O    CA
UNK    CA

N1    N
NT    N
O    N
UNK    N


OT1    O
OXT    O
UNK    O



2) Currently Jmol identifies a nucleic acid residue as a group 
containing O5' or O5*.

Q: Is this valid with the remediated set?

It would be good to know what files show the following changes:

O5*    OP3


3) In addition, Jmol attempts to determine backbone atoms from a list of 
known backbone atoms. These atoms currently include:

1H,1H2',1H5',1HA,2H,2H2',2H5',2HA,2HO',3H,
C,C1',C2',C3',C4',C5',CA,H,H1',H3',H3T,H4',H5T,HA,
N,O,O1,O1P,O2',O2P,O3',O4',O5',O5T,OP1,OP2,OXT,P

(where ' may be *)

Q: Is this valid? (Was it ever?)


Bob


Rolf Huehne wrote:

>Bob Hanson wrote:
>
>>Rolf, three questions:
>>
>>1) Can you run the same analysis, restricting your search to ATOM 
>>records? I'm guessing (hoping) that a lot of these are HETATM.
>>
>
>There are now additionally new versions available based only on "ATOM"
>records of pre-remediated files:
>
>1) Unique atom name changes (580 entries, 5 KB)
>http://www.fli-leibniz.de/ImgLibPDB/tmp/pdb_remediation-atom_name_changes-atom_records-unique.txt
>
>2) Residue specific atom name changes (2714 entries, 43 KB)
>http://www.fli-leibniz.de/ImgLibPDB/tmp/pdb_remediation-atom_name_changes-atom_records-residue_specific.txt
>
>3) All atom name changes (8682747 entries, compressed, 86 MB)
>http://www.fli-leibniz.de/ImgLibPDB/tmp/pdb_remediation-atom_name_changes-atom_records-full.zip
>
>
>>2) Is there a way to detect that a file is remediated? For example, in a 
>>remark?
>>
>>
>It is indicated in "REMARK 4" described generally in
>"http://www.wwpdb.org/documentation/format23/remarks1.html#REMARK4"; and
>specifically for remediation in
>"http://www.wwpdb.org/documentation/format3.0.1-dif.pdf";.
>
>
>
>
>Regards,
>Rolf
>
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-- 
Robert M. Hanson
Professor of Chemistry
St. Olaf College
Northfield, MN
http://www.stolaf.edu/people/hansonr


If nature does not answer first what we want,
it is better to take what answer we get. 

-- Josiah Willard Gibbs, Lecture XXX, Monday, February 5, 1900



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