Re: [ccp4bb] Difficult Molecular replacement

2024-02-20 Thread Marco Bravo
https://www.dropbox.com/scl/fo/pmw9nisdmq53yir2jqcmu/h?rlkey=zaj6cnknkjgkowrzf0vrmqdyf=0 Here is a link to my Molecular replacement and asymmetric unit contents logfiles. I ran Simple molecular replacement phaser MR through ccp4 cloud with my .mtz that was auto-processed at the ALS light

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2024-02-20 Thread Daniele de Sanctis
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[ccp4bb] Tenure track position in Protein Science for Pathogen Defense

2024-02-20 Thread Cygler, Miroslaw
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[ccp4bb] Fwd: postdoc post at world-renowned Astbury Centre, in Leeds, UK

2024-02-20 Thread Ville Uski
-- Forwarded message - From: Helen McAllister Date: Fri, 16 Feb 2024 at 13:10 Subject: [CCP4] Please could you advertise another post for us? To: c...@listserv.stfc.ac.uk Dear Sirs, Please could you advertise the following post on your website? (This is by coincidence the

Re: [ccp4bb] i2run crank2 problem

2024-02-20 Thread Stuart McNicholas
I got i2run to work with this data by: * Importing the data with "Import merged" * Importing the 2 sequences one at a time with 2 import sequence jobs * Running a 'Define AU contents' job with both sequences added to the contents. * Creating a Crank2 job, then clicking the "Show i2 run command"

Re: [ccp4bb] Difficult Molecular replacement

2024-02-20 Thread Artem Evdokimov
Hi Marco, To follow up: if your protein is something like WRN or BLM helicase - you mention recA like fold after all - (I worked on these in the past hehe) then the split into domains is almost mandatory - these proteins are very plastic and doing MR on them is equivalent to doing antibody MR

Re: [ccp4bb] [EXTERNAL] Re: [ccp4bb] Difficult Molecular replacement

2024-02-20 Thread Harry Powell
Hi Marco Further to Pedro’s comment, one way to avoid missing data in cusps is to use a multi-sweep strategy for data collection (as championed by the good folk at Global Phasing over many years). Many of the problems encountered in structure solution can be traced back to a sub-optimal data

Re: [ccp4bb] i2run crank2 problem

2024-02-20 Thread Eleanor Dodson
Hmm - I can't help with the scripting question, but it solved easily from the I2 interface? This is run on a Mac. CRANK2 called SHELX - found SE with weak signal.. Some difference between hand It traced ALA - R factor 41% Then BUCCANEER or MODELFIR quickly built and sequenced the rest.. Eleanor

Re: [ccp4bb] Difficult Molecular replacement

2024-02-20 Thread Randy John Read
Hi Marco, I was just about to write with a different suggestion when Kay’s reply came in. What Kay suggests sounds like the best thing to do first! However, if that isn’t the issue, then I’m wondering if it could be a problem with incorrectly diagnosed translational non-crystallographic

Re: [ccp4bb] [EXTERNAL] Re: [ccp4bb] Difficult Molecular replacement

2024-02-20 Thread Pedro Matias
Hi Marco, Further to Zhen's comment, that can also happen if you have a cusp containing one of the reciprocal lattice axes. The SG may be P212121 but one of the 21 is never located due to the missing data. You will always sort of get a solution from MR but you should look at the Z-score of

Re: [ccp4bb] Difficult Molecular replacement

2024-02-20 Thread Kay Diederichs
Hello Marco, this sounds to me like there is space group confusion in the sense that if you use the output model from Phaser, it may say space group P22121 (with a wrote: >Hello Todd, I get the best solution for p22121 space group after MR with an >LLG score of 640 from phaser. and the Rfree