Hi Ed,
WASP analyse water molecules in high-resolution protein structure to check
if some of those could be metal ions. WASP could be run as a part of STAN
server.
STAN - the STructure ANalysis server from USF (
http://xray.bmc.uu.se/cgi-bin/gerard/rama_server.pl )
One could also identity
Yes Uli. I have the same issue, but not solve it yet :-(
Partha
On Mon, Dec 16, 2013 at 10:52 AM, ulrich.goh...@mdc-berlin.de
ulrich.goh...@mdc-berlin.de wrote:
Dear colleagues,
Trying to run the latest version of ccp4 (6.4.0), say Refmac, I get the
following error when I fill in the
Yes.., I too had similar problem with Ctruncate, and used older truncate to
overcome the issue.
Best Wishes,
Partha
On Thu, Jun 19, 2014 at 2:38 PM, jie liu jl1...@njms.rutgers.edu wrote:
Hi
I also encountered the same problem after recent updates (not the most
recent one, but a couple of
Dear All,
Thanks to Herb, John, Simanshu, and Anu for link:
http://www.ebi.ac.uk/thornton-srv/databases/pdbsum/Generate.html
to generate PDBsum like topology diagrams.
Partha
On Sun, Apr 15, 2012 at 8:08 PM, Parthasarathy Sampathkumar
spart...@gmail.com wrote:
Dear All,
I would like
Dear All,
Guillaume Ponchel referred me to ProOrigami (which can be installed
locally) to generate protein topology diagrams:
http://munk.csse.unimelb.edu.au/pro-origami/
Thanks again.
Best wishes,
Partha
On Mon, Apr 16, 2012 at 12:12 AM, Parthasarathy Sampathkumar
spart...@gmail.com wrote
Hi Andrey,
I am taking a risky guess:
From your slide #2, it looks like a termini (unless this correspond to the
beginning or end of disordered a loop) of the protein chain(s) is (are)
extending toward(s) the solvent channel. Are the density features shown in
slides #3,4, and 5 extend from this
Dear All,
Apologies for non-CCP4 / non-Crystallography question.
I planning to spot plasmid DNA on a blotting paper for transport. I do not
have any idea what type of blotting paper is used for this purpose.
1. what type of blotting/filter paper should be used? will any type of
Whatman paper is
08 December 2010
Dear All,
Below is a summary of answers I obtained for my questions on “Blotting paper
for plasmid DNA”.
Thank you all very much for your quick response and thanks to CCP4BB.
-Partha
__
Hideaki Moriyama:
How about FTA filter papers (Whatman).
Dear Bert,
You could try the program Hole from
http://www.ncbi.nlm.nih.gov/pubmed/9195488
J Mol Graph. http://www.ncbi.nlm.nih.gov/pubmed/9195488 1996
Dec;14(6):354-60, 376.
HOLE: a program for the analysis of the pore dimensions of ion channel
structural models.
Smart
Hi Mike,
Often, I generate independent freeR set (especially in cases where soak
dataset is of different resolution (usually worse) compared to the native
dataset and do following two things to get rid-off the bias: 1. add a noise
to the coordinates (this can be done using PDBSET). 2. set the
Dear Uma,
The water pictured in W12-1.jpg: could this be a potential metal ion? If
you flip the side chain on Asn at 3.08Angstrom, then this has 3 or 4
coordination with oxygen atoms. So, provided your crystallization condition
or buffer contains metal ion(s), you could attempt to see if it fits
Hi Maria,
As mentioned by Tony, it could be a chaperonin. Having little of ATP (0.5mM
or less) and Mg2+ (1mM) in lysis buffer might help.
Good Luck,
Partha
2012/3/22 SANCHEZ BARRENA, MARIA JOSE xmj...@iqfr.csic.es
Dear all,
I am trying to express a eukatiotic protein (E. coli codon
Hi Toyoyuki,
If your protein bind to metal ions you could try low concentration of
chelating agents in the purification and storage buffer. Take a look at the
following reference:
Chelating Agents Stabilize the Monomeric State of the Zinc Binding Human
Papillomavirus 16 E6 Oncoprotein
Degenkolbe
Hi Jing,
Methods to perform In site proteolysis are available in the following
publications:
http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0005094
http://www.nature.com/nmeth/journal/v4/n12/abs/nmeth1118.html
Good Luck,
-Partha
On Sun, Oct 11, 2009 at 5:13 PM,
It should be In situ and not 'In site'. Sorry for the typo error.
-Partha
On Sun, Oct 11, 2009 at 9:59 PM, Parthasarathy Sampathkumar
spart...@gmail.com wrote:
Hi Jing,
Methods to perform In site proteolysis are available in the following
publications:
http://www.plosone.org/article/info
ThyX (also known as Flavin Dependent Thymidyalte Synthase, FDTS) is yellow
due to bound FAD.
-Partha
On Tue, Oct 20, 2009 at 5:25 PM, Artem Evdokimov ar...@xtals.org wrote:
Hello CCP4 folks!
I have a quick question - could you suggest a few naturally intensely
colored proteins? Colors based
Dear All,
I used PyMol to generate a qualitative Vacum Electrostatic surface (without
APBS calculations).
Positve and negative potentials are displayed in the range 56.3 to -56.3.
What is the units of these numbers?
Thank you,
-Partha
-- Forwarded message --
From: Parthasarathy Sampathkumar spart...@gmail.com
Date: Mon, Nov 2, 2009 at 3:41 PM
Subject: Unit of electrostatic potential in PyMol
To: CCP4BB@jiscmail.ac.uk
Dear All,
I used PyMol to generate a qualitative Vacum Electrostatic surface (without
APBS
Hi Rafael,
If it has not been already suggested: try DMSO (20% to 40%).
In my limited experience I found that often DMSO works well for
crystallization conditions with high-salt or high buffer component
(like 1M D,L,-Malic acid).
HTH,
-Partha
On Thu, Dec 17, 2009 at 1:39 PM, Meitian Wang
Dear Amit,
You might want to take a look at NOXclass webserver:
http://noxclass.bioinf.mpi-inf.mpg.de/help.php
Relevant paper is available at:
http://www.biomedcentral.com/1471-2105/7/27
Goold Luck,
Partha Sampathkumar
NYSGXRC
On Mon, Feb 22, 2010 at 6:49 AM, amit sharma 3112a...@gmail.com
Dear Serah,
It is likely that glycerol stabilized your protein via binding as it was
available in plenty during purification. Therefore, you could attempt to
purify the mutant enzymes in the presence of substrate or ligands. I am not
sure if this will work, but worth a try since you have
Hi Faisal,
There are some good video introduction available too:
https://www.youtube.com/watch?v=nkGRhYv01ag
HTH,
Partha
On Tue, May 19, 2015 at 3:01 AM, Faisal Tarique faisaltari...@gmail.com
wrote:
Hi everyone
A bit off topic..but..I request you to please suggest me some good
readings
Hi Uma,
It is risky to guess based on one-view of of the density from 2-dimensional
images. What is the contour-level of 2mFo-DFc (blue) map displayed here?!!
If 2mFo-DFc density is continuous from Arg, say at 0.8 sigma, then could it
be an alternate conformation of the Arg side-chain. One could
Hi Elizabeth,
HWI, University of Buffalo, NY offers high-throughout crystallization
screen. See the link for more information:
http://hwi.buffalo.edu/science/high-throughput-crystallization-center/
Good Luck
Partha
On Fri, Apr 14, 2017 at 9:06 AM Elizabeth Diaz
wrote:
Hi Seema,
Couple scenarios plausible (i) mutant is "super slow" compared to WT that
crystallization was setup prior to any significant reaction and / or (ii)
components, as well the pH, of crystallization condition made the reaction
even more slower. Of course, if the reaction has partially
Hi Narayanan,
This doesn't address your question; may be you could go-around this problem
by using a different purification tag., say like GST?!!
Good Luck,
Partha
On Fri, Sep 15, 2017 at 7:54 AM Narayanan Ramasubbu <
ramas...@sdm.rutgers.edu> wrote:
> Hi. We are working on a periplasmic
Hi Herman,
I worked on a kinase, where moved from 6-His in the literature to 8-His,
and it didn't impact crystallization or diffraction (which around 3Angs).
Good Luck
Partha
On Tue, Sep 19, 2017 at 9:43 AM Oganesyan, Vaheh
wrote:
> Hi Herman,
>
>
>
> I haven’t done
Hi Nicola,
Here are references for CC1/2;
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3457925/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4684713/
Best Wishes
Partha
On Tue, Aug 29, 2017 at 10:06 AM Nicola Evans
wrote:
> Hello all, I have heard at several CCP4
Hi All,
To add, on couple of occasions I re-determined the structure of so-called
"contaminants". Once, the structure of Secreted Ferritin (PDB 1Z6O) from
crystals that were supposedly that of TNF ligand:receptor complex (proteins
expressed in Tni cells), and in the second instant re-determined
Hi Vandna,
A typical approach would be to generate different models (experimental or
otherwise, if X-ray structure it could be "completed" further by modeling
missing loops / side-chains) of your sequence to calculate a SAXS profile,
and then compare / fit those to experimental SAXS profile. Some
Hi Vijay,
Why there is no 2mFo-DFc (blue) feature on this mFo-DFc (green) map?!! Is
the contour level for blue map set high?!! If there is no 2mFo-DFc density,
should this be consider as noise?!!
Hope this helps,
Best Wishes,
Partha
On Thu, Oct 26, 2017 at 10:23 AM, Vijaykumar Pillalamarri <
Dear All,
I am in a situation, almost for the first time within my limited
experience, that deglycosylation might be necessary to obtain crystal. So,
I thought of tapping to vast experience of CCP4BBers, while I am searching
literature.
I have protein that has been expressed in HEK293 cells,
*Savvas Savvides*
> >> VIB Center for Inflammation Research
> >> Dept. Biochemistry & Microbiology, Ghent University
> >> Technologiepark 927, B-9052 Ghent (Zwijnaarde), Belgium
> >> +32 (0)472 928 519 (mobile) ; +32 9 331 36 60 (office) ; Skype:
> savvas.sa
y
> EndoH). Caveat emptor.
>
> Artem
>
> - Cosmic Cats approve of this message
>
> On Mon, Jul 16, 2018 at 2:53 PM, Parthasarathy Sampathkumar <
> spart...@gmail.com> wrote:
>
>> Dear All,
>>
>> I am in a situation, almost for the first time within
gt; *Savvas Savvides*
> VIB Center for Inflammation Research
> Dept. Biochemistry & Microbiology, Ghent University
> Technologiepark 927, B-9052 Ghent (Zwijnaarde), Belgium
> +32 (0)472 928 519 (mobile) ; +32 9 331 36 60 (office) ; Skype:
> savvas.savvides_skype
> http://www
link.
Thanks,
Best Wishes,
Partha
__
Parthasarathy Sampathkumar PhD
Senior Scientist, Surrozen Inc.,
171 Oyster Point Blvd., Suite 400
South San Francisco, CA 94080
Email: par...@surrozen.com
Amplitudes in a
single MTZ file :-)
Thanks,
Partha
On Mon, Jan 25, 2021 at 9:47 PM Parthasarathy Sampathkumar <
spart...@gmail.com> wrote:
> Dear All,
>
> I have not had much experience in refining structure using data from
> twinned crystals and has started using CCP4i2
Dear All,
I have not had much experience in refining structure using data from
twinned crystals and has started using CCP4i2 very recently only.
Here is a background:
antigen-Fab crystal structure determined by MR first in P4(3)2(1)2 space
group with 1-complex molecule in the asymmetric unit
Dear All,
I would like to bring to the attention of suitable candidates the following
exciting job opportunities at Surrozen Inc, located in South San Francisco.
Surrozen is a biotechnology company focused on discovering and developing
novel regenerative medicines with a focus on unlocking the
Hi Liliana,
May be it would be good to know if this adduct was formed during
crystallization or protein was modified prior to crystallization. One
could consider performing a protease digestion, followed by LC-MS/MS to
determine the molecular weight of the adduct and then work backwards to
Hi Erik,
A couple of things to consider:
1. Begin the N-terminus from helix "initiating" residues (i.e. one residue
overhang might not be sufficient)
2. If not done already, add the 6-carboxy-fluorescein moiety at C-terminus
of the peptide
Good Luck,
Partha
On Wed, Mar 20, 2024 at 6:03 AM Erik
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