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Tutorial for Relaxation dispersion analysis r1rho fixed time recorded on varian as sequential spectra

Revision as of 16:10, 13 August 2014 by Troels Emtekær Linnet (talk | contribs) (→‎Scripts)

Intro

This tutorial is not complete.

This tutorial is based on the analysis of R1rho data, analysed in a master thesis.

The spectra is not recorded interleaved, but as a series of spectra with experimental changes.

Preparation

You want to make a working dir, with different folders 

peak_lists
spectrometer_data
scripts

You can create the folders by 

mkdir peak_lists spectrometer_data scripts

In the folder peak_lists should contain SPARKY list in SPARKY list format.
In the folder scripts we put scripts which help us processing the files.
In the folder spectrometer_data should be a directory containing directories with all experiments where each directory contain files: fid and procpar as the output from recording on Varian.

Establish file-overview

Make file with paths to fid files

We make a file list of filepaths to fid files. 

ls -v -d -1 */fid > fid_files.ls
cat fid_files.ls

Do something in each directory

With the fid_files.ls, we can do something in each directory.
For example do a list files in each direcory. 

set FIDS=`cat fid_files.ls`

foreach I (`seq 1 ${#FIDS}`)
set FID=${FIDS[$I]}; set DIRN=`dirname $FID`
cd $DIRN
ls 
cd ..
end

Extract the spectra settings from Varian procpar file

Now we want to make a settings file we can read in relax. 

set FIDS=`cat fid_files.ls`
set OUT=$PWD/exp_parameters.txt

echo "# DIRN I deltadof2 dpwr2slock ncyc trim ss sfrq apod_rmsd" > $OUT
foreach I (`seq 1 ${#FIDS}`)
set FID=${FIDS[$I]}; set DIRN=`dirname $FID`
cd $DIRN
set deltadof2=`awk '/^deltadof2 /{f=1;next}f{print $2;exit}' procpar`
set dpwr2slock=`awk '/^dpwr2slock /{f=1;next}f{print $2;exit}' procpar`
set ncyc=`awk '/^ncyc /{f=1;next}f{print $2;exit}' procpar`
set trim=`awk '/^trim /{f=1;next}f{print $2;exit}' procpar`
set ss=`awk '/^ss /{f=1;next}f{print $2;exit}' procpar`
set sfrq=`awk '/^sfrq /{f=1;next}f{print $2;exit}' procpar`
set apodrmsd=`showApod test.ft2 | grep "REMARK Automated Noise Std Dev in Processed Data:" | awk '{print $9}'`
echo "$DIRN $I $deltadof2 $dpwr2slock $ncyc $trim $ss $sfrq $apodrmsd" >> $OUT
cd ..
end

cat $OUT

You can check, if you have repetitions of experiments, by sorting the parameters, and see if they are dublicated.
We do this, by numerical sort columns 3,4 and 5 with the values for "deltadof2, dpwr2slock, ncyc". 

sort -b -k 3,3n -k 4,4n -k 5,5n exp_parameters.txt | awk '{print $3, $4, $5}'
sort -b -k 3,3n -k 4,4n -k 5,5n exp_parameters.txt > exp_parameters_sort.txt

Spectral process files

Copy data

We first copy the data 

# Copy data
cp -r spectrometer_data spectrometer_data_processed
cd spectrometer_data_processed

Change format to NMRPipe

set CWD=$PWD
set DIRS=`cat fid_files.ls | sed 's/\/fid//g'`
cd ${DIRS[1]}
varian

Now we make a file to convert from binary format of Varian to NMRPipe.

  1. Now click, 'read parameters', check 'Rance-Kay'
  2. Remember to set Y-'Observe Freq MHz' to N15
  3. Remove sleep 5 from the script.
  4. Click 'Save script' to make fid.com file, and 'Quit', and run the script.

Spectral processing

This step can be done by following wiki page Spectral_processing.
Start nmrDraw by command 

nmrDraw

Convert and spectral processing all

Now we want to convert all spectra.
You should have a fid.com and nmrproc.com in the first FID folder.
We now copy these script into all of the experimental folders, and execute them. 

cd $CWD

set FIDS=`cat fid_files.ls`
set DIRN1=`dirname $PWD/${FIDS[1]}`
 
foreach I (`seq 2 ${#FIDS}`)
set FID=${FIDS[$I]}; set DIRN=`dirname $FID`
cd $DIRN
echo $DIRN
cp -f $DIRN1/fid.com .
cp -f $DIRN1/nmrproc.com .
./fid.com
./nmrproc.com
cd ..
end

Convert NMRPipe to Sparky

Next we also want to convert them to SPARKY format. 

set FTS=`ls -v -d -1 */*.ft2`

foreach FT ($FTS)
    set DNAME=`dirname $FT`
    set BNAME=`basename $FT`
    set FNAME=`echo $BNAME | cut -d'.' -f1`
    echo $FT $DNAME $BNAME $FNAME
    pipe2ucsf $FT ${DNAME}/${FNAME}.ucsf
end

Working with peaks

Check the peak list matches

Check that your peak list matches your spectrum.
Read the section in Check the peak list matches. 

set DIRS=`cat fid_files.ls | sed 's/\/fid//g'`
sparky ${DIRS[1]}/test.ucsf

The final peak list is expected to be in: 

/peak_lists/peaks_corr_final.list

And have been saved by SPARKY, so it is in this format SPARKY_list.

Check for peak movement

Your should check, that the peaks do not move at the different experiments. Try opening some random spectra, and overlay them in SPARKY.
Read the section in Check for peak movement. 

sparky ${DIRS[1]}/test.ucsf ${DIRS[10]}/test.ucsf ${DIRS[25]}/test.ucsf ${DIRS[50]}/test.ucsf

Measuring peak heights

We will use the program NMRPipe seriesTab to measure the intensities.

seriesTab needs a input file, where the ppm values from a SPARKY list has been converted to spectral points.
The spectral points value depends on the spectral processing parameters.

Generate spectral point file

Create a file with spectral point information with script stPeakList.pl . 

stPeakList.pl ${DIRS[1]}/test.ft2 ../peak_lists/peaks_corr_final.list > peaks_list.tab
cat peaks_list.tab

Make a file name of .ft2 fil

echo "test.ft2" > ft2_file.ls

Measure the height or sum in a spectral point box

mkdir peak_lists
 
foreach line ("`tail -n+2 exp_parameters.txt`")
  set argv=( $line )
  set DIRN=$1
  set I=$2
  set deltadof2=$3
  set dpwr2slock=$4
  set ncyc=$5
  set trim=$6
  set ss=$7
  set sfrq=$8
  echo $I
  set FNAME=${I}_${deltadof2}_${dpwr2slock}_${ncyc}
  cd $DIRN
  seriesTab -in ../peaks_list.tab -out ${FNAME}_max_standard.ser -list ../ft2_file.ls -max
  seriesTab -in ../peaks_list.tab -out ${FNAME}_max_dx1_dy1.ser -list ../ft2_file.ls -max -dx 1 -dy 1
  seriesTab -in ../peaks_list.tab -out ${FNAME}_sum_dx1_dy1.ser -list ../ft2_file.ls -sum -dx 1 -dy 1
  cp ${FNAME}_max_standard.ser ../peak_lists
  cd ..
end

Analyse in relax

Preparation

Prepare directory for relax run

Then we make a directory ready for relax 

mkdir ../relax
cp exp_parameters.txt ../relax
cp exp_parameters_sort.txt ../relax
cp -r peak_lists* ../relax
cp peaks_list.tab ../relax
cd ../relax

See unique parameters

tail -n +2 exp_parameters.txt | awk '{print $3}' | sort -k1,1n | uniq
tail -n +2 exp_parameters.txt | awk '{print $4}' | sort -k1,1n | uniq
tail -n +2 exp_parameters.txt | awk '{print $5}' | sort -k1,1n | uniq
tail -n +2 exp_parameters.txt | awk '{print $6}' | sort -k1,1n | uniq
tail -n +2 exp_parameters.txt | awk '{print $7}' | sort -k1,1n | uniq
tail -n +2 exp_parameters.txt | awk '{print $8}' | sort -k1,1n | uniq

Scripts

1_setup_r1rho.py

# Python module imports.
from os import getcwd, sep

# relax module imports.
from data_store import Relax_data_store; ds = Relax_data_store()

#########################################
#### Setup
# The pipe names.
if not (hasattr(ds, 'pipe_name') and hasattr(ds, 'pipe_bundle') and hasattr(ds, 'pipe_type')):
    # Set pipe name, bundle and type.
    ds.pipe_name = 'base pipe'
    ds.pipe_bundle = 'relax_disp'
    ds.pipe_type = 'relax_disp'

# The data path
if not hasattr(ds, 'data_path'):
    ds.data_path = getcwd()

#########################################
### Start setup
# Create the data pipe.
pipe.create(pipe_name=ds.pipe_name, bundle=ds.pipe_bundle, pipe_type=ds.pipe_type)

# Read the spins.
spectrum.read_spins(file='1_0_46_0_max_standard.ser', dir=ds.data_path+sep+'peak_lists')

# Name the isotope for field strength scaling.
spin.isotope(isotope='15N')

# Load the experiments settings file.
expfile = open(ds.data_path+sep+'exp_parameters_sort.txt', 'r')
expfileslines = expfile.readlines()
expfile.close()

# In MHz
yOBS = 81.050
# In ppm
yCAR = 118.078
centerPPM_N15 = yCAR

## Read the chemical shift data.
chemical_shift.read(file='1_0_46_0_max_standard.ser', dir=ds.data_path+sep+'peak_lists')

## The lock power to field, has been found in an calibration experiment.
spin_lock_field_strengths_Hz = {'35': 431.0, '39': 651.2, '41': 800.5, '43': 984.0, '46': 1341.11, '48': 1648.5}

## Apply spectra settings.
for i in range(len(expfileslines)):
    line = expfileslines[i]
    if line[0] == "#":
        continue
    else:
        # DIRN I deltadof2 dpwr2slock ncyc trim ss sfrq
        DIRN = line.split()[0]
        I = int(line.split()[1])
        deltadof2 = line.split()[2]
        dpwr2slock = line.split()[3]
        ncyc = int(line.split()[4])
        trim = float(line.split()[5])
        ss = int(line.split()[6])
        set_sfrq = float(line.split()[7])
        apod_rmsd = float(line.split()[8])
        spin_lock_field_strength = spin_lock_field_strengths_Hz[dpwr2slock]

        # Calculate spin_lock time
        time_sl = 2*ncyc*trim

        # Define file name for peak list.
        FNAME = "%s_%s_%s_%s_max_standard.ser"%(I, deltadof2, dpwr2slock, ncyc)
        sp_id = "%s_%s_%s_%s"%(I, deltadof2, dpwr2slock, ncyc)

        # Load the peak intensities.
        spectrum.read_intensities(file=FNAME, dir=ds.data_path+sep+'peak_lists', spectrum_id=sp_id, int_method='height')

        # Set the peak intensity errors, as defined as the baseplane RMSD.
        spectrum.baseplane_rmsd(error=apod_rmsd, spectrum_id=sp_id)

        # Set the relaxation dispersion experiment type.
        relax_disp.exp_type(spectrum_id=sp_id, exp_type='R1rho')

        # Set The spin-lock field strength, nu1, in Hz
        relax_disp.spin_lock_field(spectrum_id=sp_id, field=spin_lock_field_strength)

        # Calculating the spin-lock offset in ppm, from offsets values provided in Hz.
        frq_N15_Hz = yOBS * 1E6
        offset_ppm_N15 = float(deltadof2) / frq_N15_Hz * 1E6
        omega_rf_ppm = centerPPM_N15 + offset_ppm_N15

        # Set The spin-lock offset, omega_rf, in ppm.
        relax_disp.spin_lock_offset(spectrum_id=sp_id, offset=omega_rf_ppm)

        # Set the relaxation times (in s).
        relax_disp.relax_time(spectrum_id=sp_id, time=time_sl)

        # Set the spectrometer frequency.
        spectrometer.frequency(id=sp_id, frq=set_sfrq, units='MHz')


# Read the R1 data
# relax_data.read(ri_id='R1', ri_type='R1', frq=cdp.spectrometer_frq_list[0], file='R1_fitted_values.txt', dir=data_path, mol_name_col=1, res_num_col=2, res_name_col=3, spin_num_col=4, spin_name_col=5, data_col=6, error_col=7)

See also

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