[ccp4bb] out of topic: liquid handling robot for optimisation
Dear all, We are looking for a robot to mix solutions and prepare optimisation plates for crystallisation. Ideally, the machine should accurately handle viscous liquids such as 50% PEG 4000 (or at least 40%) and start with 10-20 reagents in tubes or plates rather than large bottles. The programming software should be easy to use but flexible so that rather complex mixtures could be made... I would be grateful to hear of your experience if you use or have tried machines that can do this. Best, Valerie Valerie Biou Laboratoire de Biologie Physico-Chimique des Protéines Membranaires UMR 7099 CNRS/Univ. Paris Diderot P7 Institut de Biologie Physico-Chimique 13 rue Pierre et Marie Curie 75005 Paris - France Tel : +33 (0)1 5841 5099valerie.b...@ibpc.fr Fax : +33 (0)1 5841 5024
[ccp4bb] SISA Script Problem
Respected CCPers, I am facing a problem running the scripts for SISA, the program for phase optimization for SAD. Every time I run the script SISA asks: input run name (e.g. run_name=0001) I have already specified the run name in the script file but with no improvement. Also there seems to be no way to specify it on the fly. I am not being able to contact the email mentioned on the webpage. Could anybody please tell me where to get information for troubleshooting or point to the probable problem?. Also has this program already been integrated into phenix?. Thanks a lot in advance, Best Regards, -- *Arka Chakraborty* *ibmb (Institut de Biologia Molecular de Barcelona)* *BARCELONA, SPAIN*
Re: [ccp4bb] out of topic: liquid handling robot for optimisation
We're using an Art Robbins Scorpion. In a typical configuration it will hold three racks of either 8 50 ml Falcon tubes or 24 15 ml Falcon tubes. We use ours mostly to dispense 96 well optimization blocks with 250-500 uL per well to feed our Gryphon. We routinely dispense 50% PEG solutions, but of course this will be somewhat slow for accuracy. Software is easy to use--my undergraduates program and use it routinely. PEG blocks take 20-30 min, non-viscous blocks maybe 10 min. Roger Rowlett On Nov 29, 2013 5:12 AM, Valerie Biou valerie.b...@ibpc.fr wrote: Dear all, We are looking for a robot to mix solutions and prepare optimisation plates for crystallisation. Ideally, the machine should accurately handle viscous liquids such as 50% PEG 4000 (or at least 40%) and start with 10-20 reagents in tubes or plates rather than large bottles. The programming software should be easy to use but flexible so that rather complex mixtures could be made... I would be grateful to hear of your experience if you use or have tried machines that can do this. Best, Valerie Valerie Biou Laboratoire de Biologie Physico-Chimique des Protéines Membranaires UMR 7099 CNRS/Univ. Paris Diderot P7 Institut de Biologie Physico-Chimique 13 rue Pierre et Marie Curie 75005 Paris - France Tel : +33 (0)1 5841 5099 valerie.b...@ibpc.fr Fax : +33 (0)1 5841 5024
[ccp4bb] Job Posting for MERCK COMPANY INC.
*Sr. Scientist, Chemistry* *Merck* is a global health care leader with a diversified portfolio of prescription medicines, vaccines and consumer health products, as well as animal health products. Today, we are building a new kind of healthcare company - one that is ready to help create a healthier future for all of us. Our ability to excel depends on the integrity, knowledge, imagination, skill, diversity and teamwork of people like you. To this end, we strive to create an environment of mutual respect, encouragement and teamwork. As part of our global team, you'll have the opportunity to collaborate with talented and dedicated colleagues while developing and expanding your career. This exciting position within Merck's Structural Chemistry group will support drug lead discovery and optimization through the determination of the X-ray structures of therapeutically important proteins. The successful candidate will perform crystallization, crystal optimization, and structure determination of protein-ligand complexes and will work in collaboration with medicinal and computational chemists. The successful candidate will also work closely with molecular biologists and protein biochemists and will have access to automated cloning, expression, and crystallization technologies. *Sr. Scientist, Chemistry West Point, PA Job # CHE003955* Productive and collaborative interactions with other members of the global, cross-functional department are a must. Cooperative and collaborative use of internal expertise will be essential to success. The position requires active interaction with the scientific community to continually improve scientific understanding, including presentations at national or international meetings. The specific responsibilities of the candidate include but are not limited to: - Design, conduct, interpret and report in vitro and/or in vivo immunology studies using a wide range of established methodologies. - Ensure data generated is communicated in a concise, easy to understand manner to the appropriate teams and stakeholders. Develop new methods and protocols de novo when and where needed. Monitor, review and critically interpret published work to guide internal research. - Actively contribute scientifically to immunological drug discovery research programs, including identification and validation of novel targets. - Collaborate with members from other functional groups, including medicinal chemistry, in vivo and in vitro pharmacology and translational sciences. - Work with external academic, biotechnology, and contract research organizations. - Mentor and guide other scientists in the group. Note: There are 3 positions available. *Qualifications:* - PhD degree with 2- 3 years postdoctoral training in membrane protein crystallography. - Demonstrated capability to design and execute X-ray crystallographic structure determination using all modern techniques, including molecular replacement and experimental phasing. - Demonstrated potential to develop project management skills and identify/develop new areas of scientific expertise in protein crystallography. - Excellent communication skills (written, presentation, and oral) that enhance team-based progress is required. Application of those skills both within and outside the department to ensure the maximum understanding of program status for therapeutic area project teams and management is required. - Ability to work effectively within timelines. - Ability to prepare peer-reviewed publications. PREFERRED SKILLS: - State-of-the-art knowledge of GPCR structural biology techniques including all aspects of GPCR construct design, expression, solubilization, purification, crystallization screening/optimization (including LCP and LCP-FRAP), and structure determination/analysis a significant plus. - Experience in the application of biophysical and functional characterization methods (e.g., protein NMR, Biacore, Thermofluor, ligand binding and receptor modality) to guide protein construct optimization for crystallography is a plus. Our employees are the key to our company's success. We demonstrate our commitment to our employees by offering a competitive and valuable rewards program. Merck's benefits are designed to support the wide range of goals, needs and lifestyles of our employees, and many of the people that matter the most in their lives. To be considered for this position, please visit: https://merck.taleo.net/careersection/ext_merckunitedstates_en/jobdetail.ftl Merck is an equal opportunity employer, M/F/D/V - proudly embracing diversity in all of its manifestations. Former Military, Transitioning Service Members, National Guard Reserves - We value your past and present service.
[ccp4bb] Problem with R-factor, Completeness, and I/sigma
I have processed my Data with XDS, here the completeness is 95.5% after merging two data sets of the same crystals (initially it was 90% when was not merged) at the scaling step and R-factor is 18.5 and I/sigma is 1.45. and I further went with this data for molecular replacement where the Z-value was found to be 13. and after running Refmac the Ractor was bad its about 38.4 % then I runned the bucneer for Autobuilding and the FOM gone higher from initial cycle 0.57 to 0.75 at resolution of 2.5 Angstrom. can anybody suggest me what should I do for bringing my R factor lower and at the better positon.
Re: [ccp4bb] out of topic: liquid handling robot for optimisation
Salut Valérie, Hi all, We use a pipetting robot from Primadiag (primadiag.com). It makes it possible to pipette and mix stock solutions from a broad range of supports (Falcon tubes, vials, deepwells, multiplates ...) It allows for an accurate pipetting of viscuous solutions (up to, say, PEG40%) with good reproducibility. The interface is simple and user-friendly. HTH Martin __ Martin PICARD, Ph.D., HDR CNRS UMR 8015 Université Paris Descartes Laboratoire de Cristallographie RMN Biologiques 4, avenue de l'Observatoire x-apple-data-detectors://1 75270 Paris Cedex 06 x-apple-data-detectors://1 case courrier 48 France Office: +33 1 53 73 15 99 +33%201%2053%2073%2015%2099 Fax: +33 1 53 73 99 25 +33%201%2053%2073%2099%2025 Cell : +33 6 31 99 93 95 +33%206%2031%2099%2093%2095 martin.pic...@parisdescartes.fr http://lcrbw.pharmacie.univ-paris5.fr/ __ Le 29 nov. 2013 à 11:12, Valerie Biou valerie.b...@ibpc.fr a écrit : Dear all, We are looking for a robot to mix solutions and prepare optimisation plates for crystallisation. Ideally, the machine should accurately handle viscous liquids such as 50% PEG 4000 (or at least 40%) and start with 10-20 reagents in tubes or plates rather than large bottles. The programming software should be easy to use but flexible so that rather complex mixtures could be made... I would be grateful to hear of your experience if you use or have tried machines that can do this. Best, Valerie Valerie Biou Laboratoire de Biologie Physico-Chimique des Protéines Membranaires UMR 7099 CNRS/Univ. Paris Diderot P7 Institut de Biologie Physico-Chimique 13 rue Pierre et Marie Curie x-apple-data-detectors://9/0 75005 Paris - France x-apple-data-detectors://9/0 Tel : +33 (0)1 5841 5099 +33%20(0)1%205841%205099 valerie.b...@ibpc.fr Fax : +33 (0)1 5841 5024 +33%20(0)1%205841%205024
