of the compound is fitting well enough into
the density. The B factor of the ligand is showing 100. How can I justify this
issue. Asking for suggestions.
Regards,
Dipankar Manna
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Dear All,
I fitted a ligand into a structure along with SO4 and waters (COOT). Then I did
the Merge Molecules and did the refinement. In output PDB file the chain ID
sequence is showing B, A, C( ligand, protein and SO4 respectively) and the ATOM
numbering is starting from ligand (Chain B
Dear Crystallographers,
After one round of refinement (restrained refinement) with ligand, I inport the
.cif file through '-Import CIF Dictionary' into Coot. But when I am going for
'-Real Space Refine Zone' for the ligand, its showing Refinement set up
failure. Failed to find restrained for:
but the cell parameters are a=67.9,
b=82.4, c=91.7. Should I continue with this parameter? What are the other
possibilities for indexing?
Thanks for your suggestions in advance.
Regards,
Dipankar Manna
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square value. Does anybody
experienced this situation?
Thanks in advance.
Regards,
Dipankar Manna
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information.If you
Dear All,
Recently I collected one data set for the protein having SG P222 with a= 36.8,
b= 44.7, c= 78.4(reported with compound). I crystallized the protein with same
kind of other compound. The diffraction was up to 2.3A. But I am facing problem
during indexing. I tried with SGP222 (as
%, but when I run rigid body
refinement (Refmac5) the Rfactor is showing 46.07% and Rfree is 46.27. is it
possible? Or else what I have to do with this data.
Please suggest.
Regards
Dipankar Manna
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that much. Please give me some suggestions.
Regards,
Dipankar
Dipankar Manna
Aurigene Discovery Technologies Limited,
#39-40 KIADB Industrial Area, Electronic City, Phase II,
Hosur Road, Bangalore- 560 100, India
Cell: +91-9538631469 | Office Ph : +91 80-66204422 (Extn: 398) | Email ID:
dipanka
Dear All,
As I am practicing new in the crystallography, I am facing some difficulties in
refining the ligand bound structure. Protein I am working with has SG P212121,
it's a dimer. I fitted the ligand on the density with
COOT--calculate--Model/Fit/Refine--Rotate/Translate Zone. Then I merged
Dear Crystallographers,
Can anybody guide me how to reduce R-factor, means which are the basic
parameters I have to look for to reduce the R-factor during refinement. I am
newly learning the refinement. After running molrep R-factor is around 53%
(100% identity), after rigid body refinement
Dear Crystallographers,
May be this is a very stupid question- which terminology should we use for
crystal data collection- Crystal Rotation or Crystal Oscillation or
both?
I apologise if this is already discussed!
Best,
Dipankar
--
Dipankar Manna
Research Scholar
Department of Chemistry
: Thought about any E.Coli protease as an impurity.. very
small quantity?
Cheers,
Rajesh.
On Mon, Apr 20, 2015 at 9:14 PM, Dipankar Manna
dipankar.biot...@gmail.com wrote:
Dear Barbel,
Thank you!
Yes you are right that I did the SDS-PAGE with bigger substrate.
Regarding peptide, we
not to be what the label says.
Bärbel
Zitat von Dipankar Manna dipankar.biot...@gmail.com:
Dear Bonsor,
Thanks for your suggestions!
It need 2-3 weeks to get the fully grown crystals. And harvest, freeze and
data collection just take usually next 3-5 days. I usually incubated
substrate
getting the cleaved peptide as I already
mutated the active residue Cysteine with Alanine (this mutant did no show
any activity when I checked with SDS-PAGE).
If anybody has the same kind of experience please advice me.
Thanks in advance.
Best,
Dipankar
--
Dipankar Manna
Research Scholar
the course of crystallization.
You may want to use fresh beads, or treat columns with pepsin or sodium
hydroxide.
Not real answers I am afraid, more like suggestions.
--
Dipankar Manna
Research Scholar
Department of Chemistry
University of Oslo
Oslo, Norway
me the further steps. Is it
possible that the native signal is necessary for the secretion, even in the
insect cell expression? Also what other signal sequences could be used
instead of HBM?
Thanks in advance for your suggestions/comments!
Best,
Dipankar
--
*Dipankar Manna, Ph.D*
Postdoctoral
es (refolding, concentration, heating etc).
>
> Also I would echo the comment about adding in inhibitors - not only can
> they prevent proteolysis, but can also stabilise the active site and help
> with refolding.
>
> Good luck with it!
>
> Tom
>
>
>
>
> On T
,
Dipankar​
--
*Dipankar Manna, Ph.D*
Postdoctoral Researcher
Department of Molecular Medicine
Institute of Basic Medical Sciences
University of Oslo, Domus Medica
Oslo, Norway
Mob : +47 451 66 517 <451%2066%20517>
E-mail: dipankar.ma...@medisin.uio.no <dipankar.ma...@kje
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