Re: [ccp4bb] sugestions on weak diffracting protein crystals

2021-05-19 Thread Patrick Shaw Stewart
Hi Deepak In my opinion, rMMS microseeding, ie adding crushed seed crystals into *random screens*, should be used routinely in most crystallization projects. It gives much more control, in particular you can control the number of crystals per drop. In a case like this, I would use it straight

Re: [ccp4bb] sugestions on weak diffracting protein crystals

2021-05-18 Thread Jacqueline Vitali
Hi Deepak, If this is a metalloprotein, include higher concentration of the metal in the crystallization drop. It may act as a glue in the interfaces and give you a good crystal. Jackie Vitali Cleveland State University On Tue, May 18, 2021 at 6:20 AM Deepak Deepak wrote: > Dear all, > > I

Re: [ccp4bb] sugestions on weak diffracting protein crystals

2021-05-18 Thread Mark J. van Raaij
If the foldamer(s) have exposed flexible parts they may impede ordered crystallisation. Perhaps some minor tweaks to the foldamer or foldamers you are co-crystallising with might lead to a better crystal contacts? For example removing one or a few residues from the end(s) or shortening a loop.

Re: [ccp4bb] sugestions on weak diffracting protein crystals

2021-05-18 Thread Edward Snell
edical Research Institute 700 Ellicott Street | Buffalo, NY 14203-1102 hwi.buffalo.edu<https://hwi.buffalo.edu/> [hwi-logo-primary-horizontal] From: CCP4 bulletin board On Behalf Of Deepak Deepak Sent: Tuesday, May 18, 2021 6:08 AM To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] sugest

Re: [ccp4bb] sugestions on weak diffracting protein crystals

2021-05-18 Thread Oganesyan, Vaheh
com> From: CCP4 bulletin board On Behalf Of Schreuder, Herman /DE Sent: Tuesday, May 18, 2021 8:33 AM To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] AW: [ccp4bb] sugestions on weak diffracting protein crystals Dear Deepak, the cryoprotection may destroy the diffraction. I would also try diffr

[ccp4bb] AW: [ccp4bb] sugestions on weak diffracting protein crystals

2021-05-18 Thread Schreuder, Herman /DE
, Herman Von: CCP4 bulletin board Im Auftrag von Deepak Deepak Gesendet: Dienstag, 18. Mai 2021 12:08 An: CCP4BB@JISCMAIL.AC.UK Betreff: [ccp4bb] sugestions on weak diffracting protein crystals Dear all, I have got multiple crystals (see picture 1) of a protein (8kDa) with a helical aromatic

Re: [ccp4bb] sugestions on weak diffracting protein crystals

2021-05-18 Thread Natesh Ramanathan
Dear Deepak, I have a few suggestions: 1) First you can send it to synchrotrons, particularly microfocus beamlines and shoot as many good in-house diffracting crystals. 2) Setting up crystallisation by micro batch method under Al's oil at various vapour exchange rate may help.