Re: [ccp4bb] Detection of DNA in protein complex crystals

2009-06-23 Thread Joel Guenther
The same goes for other DNA-binding dyes. I've seen a polymerase that binds EtBr. -Joel On Tue, Jun 23, 2009 at 1:38 PM, Kevin Jude wrote: > Note that, despite the claim otherwise in Kettenberger and Cramer, SYBR > Gold does stain at least some proteins, so be sure to run the appropriate >

Re: [ccp4bb] Detection of DNA in protein complex crystals

2009-06-23 Thread Nian Huang
Hi, Kevin, Wash your crystal very very well to get rid of unbound DNA. Then run your crystal with SDS PAGE gel, with protein and DNA as markers. After staining the gel with silver stain, the DNA will show with different color and migrate about where the dye locates. So don't run too long time. Reg

Re: [ccp4bb] Detection of DNA in protein complex crystals

2009-06-23 Thread Kevin Jude
Note that, despite the claim otherwise in Kettenberger and Cramer, SYBR Gold does stain at least some proteins, so be sure to run the appropriate controls. kmj On Tue, Jun 23, 2009 at 11:52 AM, Allyn Schoeffler wrote: > Dear Nick, > > If you have access to a fluorescent microscope, you can try

Re: [ccp4bb] Detection of DNA in protein complex crystals

2009-06-23 Thread Allyn Schoeffler
Dear Nick, If you have access to a fluorescent microscope, you can try staining crystals with PicoGreen and seeing if they fluoresce. (see ref: Kettenberger H & Cramer P, 2006, Acta Cryst D v62 pp146-150: Kettenberger H, Cramer P.Fluorescence detection of nucleic acids and proteins in multi-compo

Re: [ccp4bb] Detection of DNA in protein complex crystals

2009-06-23 Thread Jacob Keller
Laboratory F. Searle 1-240 2240 Campus Drive Evanston IL 60208 lab: 847.491.2438 cel: 773.608.9185 email: j-kell...@northwestern.edu *** - Original Message - From: "Nick Quade" To: Sent: Tuesday, June 23, 2009 8:06 AM Subject: [ccp4bb] Detection

[ccp4bb] Detection of DNA in protein complex crystals

2009-06-23 Thread Nick Quade
Dear all, I am trying to solve the structure of a transcription factor in complex with its DNA. I got crystals of the complex under different conditions than the protein alone and they also look different. Unfortunately, they only diffract to 6Å so far. Before I continue to optimize the crystals