[ccp4bb] Postdoc position at Vanderbilt University

2018-03-07 Thread Karakas, Erkan
Dear all, A postdoctoral position is available in the Karakas lab at Vanderbilt University School of Medicine. Our group is interested in understanding the molecular mechanism of intracellular ion channels involved in calcium signaling using structural biology approaches. More details of the

Re: [ccp4bb] Unknown density

2018-03-07 Thread Degano Massimo
I would not rely only on coordination numbers, since Ca2+ can be also hepta-coordinated. You can look at the high resolution structures of parvalbumin and nucleoside hydrolases. And, although not up to date, this site is also useful http://mespeus.bch.ed.ac.uk/tanna/ . The anomalous map

Re: [ccp4bb] Unknown density

2018-03-07 Thread Daniel M. Himmel, Ph. D.
Rajesh, Ca2+ usually is coordinated by five atoms, whereas Mg2+ usually is coordinated by six. I've seen that a lot in structures that I've determined. -Daniel On Wed, Mar 7, 2018 at 2:14 PM, Eleanor Dodson < 176a9d5ebad7-dmarc-requ...@jiscmail.ac.uk> wrote: > You just calculate a anom

[ccp4bb] Team Lead/Senior Scientist (Computational Chemistry) position at Frederick National Laboratory for Cancer Research

2018-03-07 Thread Dhirendra K Simanshu
(Apologies for the reposting, the web-link now work correctly) Hello everyone, The Frederick National Laboratory for Cancer Research (FNLCR, operated by Leidos Biomedical Research for NCI) is looking for a Team Lead/Senior Scientist (Computational Chemistry). FNLCR serves as the hub for the NCI

Re: [ccp4bb] Unknown density

2018-03-07 Thread Rajesh Kumar
Hi Ivan, https://csgid.org/csgid/metal_sites/ suggest that Mg++ is the correct metal. Ca++ is not acceptable. I am going to validate it by calculating anomalous peak for Ca++ too. Thank you Rajesh On Wed, Mar 7, 2018 at 1:06 PM, Ivan Shabalin < iva...@iwonka.med.virginia.edu> wrote: > Hi,

Re: [ccp4bb] Unknown density

2018-03-07 Thread Ivan Shabalin
Hi, Rajesh, It does look like Ca to me. It has around 2.4 A distances to waters and quite many electrons (18), which correspond to rather wide and high density peak in the middle. Mg has distances at 2.07, and 10 electrons (should be a smaller peak). Na has 2.41 distances to waters, 10

Re: [ccp4bb] Unknown density

2018-03-07 Thread Eleanor Dodson
You just calculate a anom map - it doesnt need you to dselect Ca or Mg or anything else.. Judge the peak heights by the signal you get over any S sites in the model. The relative signal you expect depends on your wavelength of course. Eleanor On 7 March 2018 at 19:09, Rajesh Kumar

Re: [ccp4bb] Unknown density

2018-03-07 Thread Daniel M. Himmel, Ph. D.
Oops. I meant to say that Ca2+ usually has seven coordinating atoms. Mg2+ usually has six. Sorry for the error. -Daniel On Wed, Mar 7, 2018 at 2:27 PM, Daniel M. Himmel, Ph. D. < danielmhim...@gmail.com> wrote: > Rajesh, > > Ca2+ usually is coordinated by five atoms, whereas Mg2+ usually is >

Re: [ccp4bb] suggestions on a microscope for Crystallography

2018-03-07 Thread Georg Mlynek
Dear Chandra, we are also currently getting quotes for a new microscope. I recently worked at Oak ridge with a Zeiss SteREO Discovery.V20 https://www.zeiss.com/microscopy/us/products/stereo-zoom-microscopes/stereo-discovery-v20.html (everything motorized, which is not really needed) and at

[ccp4bb] Research Technician Opening at Birkbeck College, London

2018-03-07 Thread Altin Sula
Hi all, We have a Research Technician position for 11 months initially, in professor B.A. Wallace's lab to work on cloning, membrane protein expression and purification, binding assays to small molecules and co-crystallisation. The full job descriptions and details of how to apply are in

Re: [ccp4bb] validating a homlology model

2018-03-07 Thread Gert Vriend
Careina, Feel free to contact me about these things without using the CCP4BB list. I am sending this to the list with as purpose that others might in the future refer people with questions about homology modelling to me. After all, although the possibility to build homology models is one of

[ccp4bb] Postdoctoral Fellowship in Molecular Biology at Uppsala University

2018-03-07 Thread Julia Griese
Dear all, *A two-year postdoctoral fellowship, funded by the Carl Tryggers Foundation, is available in the group of Julia Griese in the Department of Cell and Molecular Biology at Uppsala University, Sweden. * Research in the Griese lab is at the intersection of structural biology,

Re: [ccp4bb] suggestions on a microscope for Crystallography

2018-03-07 Thread Patrick Shaw Stewart
Hi Chandra My only comment is be careful of modern microscopes that have a frosted glass screen with LEDs behind it, just below the plate. For looking at crystals you need *directional *light. I've seen some very expensive modern microscopes with illumination that just doesn't work for