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Dear Rhys,
with good 2.0A data you could try S-SAD, or MR-SAD. For the latter I
recommend autorickshaw (http://www.embl-hamburg.de/Auto-Rickshaw/).
Best,
Tim
On 10/01/2012 09:26 PM, RHYS GRINTER wrote:
> Hi All,
>
> I'm currently working on solving the structure of a protein by
> molecular replacement. The protein is around 30kDa and likely has a
> two beta-prism domains, linked by a long curved two stranded sheet
> based on the structure of an analogue. There are also a number of
> other structures which represent a single homologous beta-prism
> domain. I've tried to find MR solution using the analogue and
> various truncation/AA substitution models based on it with no
> success. I've also tried single domain ensembles of the other
> homologous structures, also with no success. I think the problem is
> the overall sequence homology is quite low between my protein and
> the available structures (35% for the analogue and around 20% for
> the other models.
>
> I was curious as to how someone with more experience would tackle
> this problem.
>
> Just for background, the datasets I have are 2 to 2.7 angstroms
> with pretty nice stats. The space group is most likely C2221 with
> two molecules per ASU (giving around 58% solvent).
>
> Thanks,
>
> Rhys Grinter PhD Candidate University of Glasgow
- --
- --
Dr Tim Gruene
Institut fuer anorganische Chemie
Tammannstr. 4
D-37077 Goettingen
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