I like PIP (di-mu-iodo-bis-ethylenediamine-di-platinum (II) nitrate).
At low resolution it offers you 4 heavy atoms (I2Pt2), a choice of
anomalous signal, and at higher resolution if you can resolve the 4
heavy atoms you then instantly get higher resolution phases.
It likes binding as a low-res ball in active sites and with more order
at -S-S- (disulfide) and -S- (methionine thioether) positions. I've also
seen it rather arbitrarily located in a solvent channel
Cheers,
Charlie
Phoebe Rice wrote:
> My post-doc recently produced a splendid (for its resolution)
> ~5A map of a "medium" sized protein-DNA complex using Ta6Br12
> clusters. And he's got a good toehold on a ~340kDa complex
> using the same clusters. So I'm recently converted to these
> little nuggets.
> Phoebe
>
> ---- Original message ----
>> Date: Thu, 14 May 2009 09:35:28 +0200
>> From: Clemens Grimm <[log in to unmask]>
>> Subject: [ccp4bb] Phasing at Low Resolution
>> To: [log in to unmask]
>>
>> Dear all,
>>
>> after the SeMet phasing discussion, what would be -in
> general- the
>> best technique to phase low resolution data (<=4A) of large
> complexes
>> (>=150 kDA) - in terms of
>>
>> - derivatization compounds (is there something like the
> 'golden
>> five' HA compounds for these cases),
>>
>> - data collection techniques and
>>
>> - phasing methods?
>>
>> Clemens
> Phoebe A. Rice
> Assoc. Prof., Dept. of Biochemistry & Molecular Biology
> The University of Chicago
> phone 773 834 1723
> http://bmb.bsd.uchicago.edu/Faculty_and_Research/01_Faculty/01_Faculty_Alphabetically.php?faculty_id=123
>
> RNA is really nifty
> DNA is over fifty
> We have put them
> both in one book
> Please do take a
> really good look
> http://www.rsc.org/shop/books/2008/9780854042722.asp
>
--
Charlie Bond
Professorial Fellow
University of Western Australia
School of Biomedical, Biomolecular and Chemical Sciences
M310
35 Stirling Highway
Crawley WA 6009
Australia
[log in to unmask]
+61 8 6488 4406
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