Many thanks to Brian and Simon for your quick answers.
It was indeed all about setting CO atom types. I assigned the missing
ones now and, voila, works now pretty fine.
Issue solved.
Regards,
Marcel
Brian Smith wrote:
> There are a couple of things that sometimes affect this:
>
> 1. CO atom types. If you have CO atoms picked, analysis is often quite
> fussy about having them already typed as CO rather than just given a
> resonance. I've been meaning to write a macro to type the 13C dim of
> all HNCO & HNCACO peaks to C, but Tim can probably give us chapter and
> verse in about three lines of code.
>
> 2. aliasing. For Gly, Ser & maybe Thr where your N is aliased, since
> analysis uses the BMRB database values to calculate the likelihood of
> being a particular residue type, an aliased N shift will result in a
> poor match. Good practice is to always record 15N HSQCs at a couple of
> different 15N sweepwidths so you can easily identify the aliased
> peaks.
>
--
Marcel Jurk
Leibniz Institut fuer Molekulare Pharmakologie (FMP)
Solution NMR (AG Schmieder)
Robert-Roessle-Str. 10
13125 Berlin
Germany
eMail: [log in to unmask]
Phone: +49-30-94793223
Fax: +49-030-94793169
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