[ccp4bb] ccp4-6.1.3 phaser sigmaa weighted maps problem

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CCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999

Previous message:
Subject: Re: Slow COOT with Fedora 12
From: Eric Larson larsonet {- at -} U {- dot -} WASHINGTON {- dot -} EDU
Date: 2010-02-04

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Subject: Re: ccp4-6.1.3 phaser sigmaa weighted maps problem
From: "S {- dot -} Karthikeyan" skarthik {- at -} IMTECH {- dot -} RES {- dot -} IN
Date: 2010-02-04

Subject: ccp4-6.1.3 phaser sigmaa weighted maps problem
From: hari jayaram harijay {- at -} GMAIL {- dot -} COM
Date: 2010-02-04

Hi ,
I just switched to ccp4-6.1.3 and ran the phaser which is bundled
with the ccp4-6.1.3 release. After molecular replacement I get a
pretty good solution (TFZ 59.2) and output pdb and mtz files.
I am then looking at the maps from the phaser output mtz i.e the FWT ,
PHWT map and the FWT PHIC map . Both maps look very crappy and look
like noise. I tried the fft inside of coot and separately as a FFT
inside ccp4 and these maps look bad. So the FWT PHWT calc seem to be
off.

However , if I take the phaser solution output model and do the sigmaa
myself. The map looks normal and sensible.

It seems like phaser inside of ccp4-6.1.3 is not generating the output
mtz correctly .
Anyone else seeing this or is there something wrong with my setup.

Hari

CCP4bb navigation

CCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999

Previous message:
Subject: Re: Slow COOT with Fedora 12
From: Eric Larson larsonet {- at -} U {- dot -} WASHINGTON {- dot -} EDU
Date: 2010-02-04

Next message:
Subject: Re: ccp4-6.1.3 phaser sigmaa weighted maps problem
From: "S {- dot -} Karthikeyan" skarthik {- at -} IMTECH {- dot -} RES {- dot -} IN
Date: 2010-02-04