Re: [ccp4bb] Refmac and metal on a two-fold?

2012-01-02 Thread Herman . Schreuder
Message- From: CCP4 bulletin board [mailto:CCP4BB@JISCMAIL.AC.UK] On Behalf Of Ed Pozharski Sent: Monday, January 02, 2012 7:45 AM To: CCP4BB@JISCMAIL.AC.UK Subject: Re: [ccp4bb] Refmac and metal on a two-fold? On Sun, 2012-01-01 at 12:14 -0600, Dima Klenchin wrote: With Garib's help, I have

Re: [ccp4bb] Refmac and metal on a two-fold?

2012-01-02 Thread George M. Sheldrick
- From: CCP4 bulletin board [mailto:CCP4BB@JISCMAIL.AC.UK] On Behalf Of Ed Pozharski Sent: Monday, January 02, 2012 7:45 AM To: CCP4BB@JISCMAIL.AC.UK Subject: Re: [ccp4bb] Refmac and metal on a two-fold? On Sun, 2012-01-01 at 12:14 -0600, Dima Klenchin wrote: With Garib's help, I have

Re: [ccp4bb] Refmac and metal on a two-fold?

2012-01-02 Thread Herman . Schreuder
with refmac. Best regards, Herman -Original Message- From: CCP4 bulletin board [mailto:CCP4BB@JISCMAIL.AC.UK] On Behalf Of George M. Sheldrick Sent: Monday, January 02, 2012 1:22 PM To: CCP4BB@JISCMAIL.AC.UK Subject: Re: [ccp4bb] Refmac and metal on a two-fold? I am surprised

Re: [ccp4bb] Refmac and metal on a two-fold?

2012-01-01 Thread Ed Pozharski
I've seen this happening to water molecules as well (in a somewhat unpredictable fashion). In the latest refmac versions, you can try harmonic restraints, although these will only slow down the atom drift, as the target position is updated every cycle. Perhaps you can use distance restraints

Re: [ccp4bb] Refmac and metal on a two-fold?

2012-01-01 Thread Dima Klenchin
I've seen this happening to water molecules as well (in a somewhat unpredictable fashion). In the latest refmac versions, you can try harmonic restraints, although these will only slow down the atom drift, as the target position is updated every cycle. Perhaps you can use distance restraints

Re: [ccp4bb] Refmac and metal on a two-fold?

2012-01-01 Thread Cale Dakwar
Good to know, thanks. I was actually wondering about this recently. On Sun, Jan 1, 2012 at 1:14 PM, Dima Klenchin klenc...@facstaff.wisc.eduwrote: I've seen this happening to water molecules as well (in a somewhat unpredictable fashion). In the latest refmac versions, you can try harmonic

Re: [ccp4bb] Refmac and metal on a two-fold?

2012-01-01 Thread Ed Pozharski
On Sun, 2012-01-01 at 12:14 -0600, Dima Klenchin wrote: With Garib's help, I have forced the atom into its position by using external distance restrains of zero length against the same symmetry-related atom. The cause is unclear because the same program handles special positions in another

[ccp4bb] Refmac and metal on a two-fold?

2011-12-28 Thread Dima Klenchin
Hello, I have a metal ion sitting on a two-fold. I assigned it an occupancy of 0.5 but Refmac keeps refining it away from that position so that in the end there is a symmetry-related ion 1.6A away. I thought that this problem has been rectified long ago? Certainly I had several occasions