Re: [ccp4bb] blocking activated thiol

2021-02-25 Thread Soisson, Stephen M
I would try iodoacetamide. Sent from my iPhone > On Feb 25, 2021, at 7:58 PM, David wrote: > > EXTERNAL EMAIL – Use caution with any links or file attachments. > > I would like to know how to block activated groups on Thiol-activated > Sepharose 4B (after coupling a peptide). The

[ccp4bb] Postdoc position at Washington University

2021-02-25 Thread Li, Weikai
Dear all, We have a postdoc position available at Washington University in St. Louis. The postdoctoral research will focus on elucidating the structural mechanism of membrane proteins as targets of cardiovascular therapy using novel multidisciplinary approaches. Please see attachment for

[ccp4bb] blocking activated thiol

2021-02-25 Thread David
I would like to know how to block activated groups on Thiol-activated Sepharose 4B (after coupling a peptide). The immobilized peptide will be used later to purify/identify which antibody binds to this peptide. For CNBr-activated sepharose I use Tris or ethanolamine to block the remaining

Re: [ccp4bb] NCS/Pseudo-symmetry

2021-02-25 Thread Eleanor Dodson
Well - you are a long way from a solution! All those rotation angles are close to each other.. What is the cell? How similar is the model to your structure? Have you looked at the self rotation function? Eleanor On Thu, 25 Feb 2021 at 20:54, Muhammad Bashir Khan wrote: > *Hello everyone;* > >

[ccp4bb] NCS/Pseudo-symmetry

2021-02-25 Thread Muhammad Bashir Khan
*Hello everyone;* *I collected data set which can be easily processed in a space grouop P21 (P1211)* *at approx 3.7A. I procedeed with MR using phaser in phenix which give a solution with two copies. * ** There were 8 solutions ** Pdb and/or Mtz files have been written with results for 1 of

Re: [ccp4bb] Co-crystallization and thermal shift assay

2021-02-25 Thread Maria Cristina Nonato
*Dear Saif* *Hope you are doing well and safe!* 1) How much change in Tm (ΔTm) in a thermal shift assay is considered to be significant ? *As it has already been mentioned there is no specific cutoff for deltaTm to be considered significant. DeltaTm depends on many factors, including the type

Re: [ccp4bb] Co-crystallization and thermal shift assay

2021-02-25 Thread Prem Prakash
Hi Saif, If your goal is to perform co-crystallization, I am completely agreed with David's suggestions. Delta Tm does matter in the co-crystallization but that's not always the case. I have some experience with protein complexes where I successfully co-crystallized by using really high molar

[ccp4bb] Fwd: [ccp4bb] Co-crystallization and thermal shift assay

2021-02-25 Thread mesters
Hello, we had an interesting case in the lab many years ago... Using the shift-assay, a student managed to identify conditions that markedly stabilized the protein of interest. To cut a long story short, in the end it turned out conditions were identified that gave monomers while the

Re: [ccp4bb] Co-crystallization and thermal shift assay

2021-02-25 Thread David Briggs
Hi Saif, Whilst in very general terms, ∆Tm does correlate with binding affinity (there will of course always be exceptions to this rule), I don't think there is a cutoff beyond which you know that co-crystallisation is feasible. The degree of stabilisation will depend very much on the system

[ccp4bb] Co-crystallization and thermal shift assay

2021-02-25 Thread Saif Mohd
Hello everyone, 1) How much change in Tm (ΔTm) in a thermal shift assay is considered to be significant ? 2) A negative ΔTm infers that the compound is making the protein unstable. In such a case, will the co-crystallization be difficult or just impossible or on the contrary it shouldn't matter

[ccp4bb] Postdoc position, Plant Hormone Transporting Membrane Proteins (Denmark)

2021-02-25 Thread Bjørn Panyella Pedersen
Dear colleagues, We have an open postdoc position. 3 days left before deadline. Come joint us. Great working environment, World-class science. Good work/life balance. /Bjørn --- Postdoctoral position in Structure of Plant Hormone Transporting Membrane Proteins

[ccp4bb] Call for proposals at BioMAX (MAX IV)

2021-02-25 Thread Ana Gonzalez
We welcome your application for synchrotron beamtime at BioMAX. BioMAX is a dedicated macromolecular crystallography beamline at the 4th generation synchrotron source MAX IV. It offers a wide array of techniques, from high throughput conventional oscillation experiments and experimental phasing