Phenylketonuria/Task3/Scripts

Secondary Structure

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filter_secStruc.pl

This script reads an input file in ReProf format or PsiPred and filters the file for the secondary structur presented with E,H and L/C. Also it can read a DSSP file. If the structure forms a loop or irregular a "-" is inserted.
You can find the script in /mnt/home/student/waldraffs/masterpractical/Task03/secondary_structure/filter_secStruc.pl

Usage: perl filter_secStrucpl -inp <input-file in ReProf format> -out <output-file> -reprof|-psipred|-dssp 
-reprof: if the input file is result of a ReProf run.
-psipred: if the input file is result of a PsiPred run.
-dssp: if the input file is result of a DSSP run.

The output is the secondary structure shown with the letters E, H and L. Therefore at PsiPred the letter C is converted to L and at DSSP the letters G and I are replaced by H, B by E and S and T by L.

Code:

<source lang="perl">

1. !/usr/bin/perl

my $inp; my $out; my $reprof = 0; my $psipred = 0; my $dssp = 0;

1. Reads the command line parameters

for ($i=0; $i<=@ARGV;$i++){ if($ARGV[$i] eq "-inp"){ $inp=$ARGV[$i+1]; } if($ARGV[$i] eq "-out"){ $out=$ARGV[$i+1]; } if($ARGV[$i] eq "-reprof"){ $reprof = 1; } if($ARGV[$i] eq "-psipred"){ $psipred = 1; } if($ARGV[$i] eq "-dssp"){ $dssp = 1; } }

if(!$inp && !$out){ print "Usage: filter_secStruc.pl -inp <input-file(.reprof)> -out <output-file> -reprof|-psipred|-dssp" }

my $secstructure= ""; my $no = 0;

1. reads input file and filters for the coloumn with secondary structure

open (FILE,"$inp") || die $!; if($reprof == 1){ while (my $line = <FILE>){

if($no == 1){ @splitLine = split(/\t/,$line); $secstructure=$secstructure.$splitLine[2]; }

if($line =~ /^No/){ $no = 1; } } } if($psipred == 1){ while (my $line = <FILE>){ if($line =~ /^Pred/){ @splitLine = split(/ /,$line); chomp($splitLine[1]); $secstructure = $secstructure.$splitLine[1]; } } $secstructure =~ s/C/L/g; } if($dssp ==1){ $number = 0; while (my $line = <FILE>){ if($no ==1){ $line =~ s/^\s+//g; @splitLine = split(/ /,$line); my $letter = ""; if($splitLine[1] eq "" && $splitLine[2] eq "" && $splitLine[3] eq ""){ $number = 1; } if($splitLine[1] eq "" && $splitLine[2] eq "" && $splitLine[3] ne ""){ $number = 2; } if($splitLine[1] eq "" && $splitLine[2] ne ""){ $number = 3; } if($splitLine[0] < 10){ $letter = $splitLine[9-$number]; } elsif($splitLine[0] >9 && $splitLine[0] < 100){ $letter = $splitLine[9-$number]; } else{ $letter = $splitLine[9-$number]; } if($letter eq ""){ $letter="-"; } $secstructure = $secstructure.$letter;

} if($line =~ /^ #/){ $no = 1; } } $secstructure =~ s/[G,I]/H/g; $secstructure =~ s/B/E/g; $secstructure =~ s/[S,T]/L/g; } close FILE;

1. writes output file

open(OUTFILE,">$out") || die $!; print OUTFILE $secstructure; close OUTFILE; </source>

SecStrucComparison.jar

The script takes two sequences as input (presented with E, H, L and -) and calculates the precision between those.

Usage:
java -jar SecStrucComparison.jar 
-i_seq1 <input-file 1>: first structure sequence (used as reference for precision) 
-i_seq2 <input-file 2>: second structure sequence
-o <output-file>: returns a list with the precision for E, H and L of the first sequence as well as the overall precision.

The structure sequences must be in the format of the filter_secStruc.pl output. Furthermore the two sequences must have the same length.
You can find the script in /mnt/home/student/waldraffs/masterpractical/Task03/secondary_structure/SecStrucComparison.jar

It must be considered which sequence should be used as first or second, as they can have a different number of E, H or L. Those letters are counted for the first sequence only and used for calculation of the precision. For the total precision there is no difference.

Java-code: <source lang="java"> package structureComparison;

import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.io.FileWriter; import java.io.PrintWriter; import java.util.HashMap;

/**

* 
* This class takes two secondary structure sequences (represented with E, H, L and -) and calculates the precision between those.
* 
* @author Sonja Waldraff
*
*/

public class SecStrucComparison { private static String i_seq1; private static String i_seq2; private static String o; private static HashMap<String, String> secStruc = new HashMap<String, String>(); private static double prec_E = 0.0; private static double prec_H = 0.0; private static double prec_L = 0.0; private static double prec_total = 0.0;

/** * read Input-Parameters * -i_seq1: Input-file of the secondary structure sequence (#letters are counted) * -i_seq2: Input-file of the secondary structure sequence (to be compared with seq1) * -o: Output-file returns a list with precision for the letters E, H and L as well as for all residues. * * @param args */ public static void getCMDargs(String[] args) { int j = 0; if (args.length == 6) { while (j < args.length) { if (args[j].equals("-i_seq1")) { j++; i_seq1 = new String(args[j]); } else if (args[j].equals("-i_seq2")) { j++; i_seq2 = new String(args[j]); } else if (args[j].equals("-o")) { j++; o = new String(args[j]); } j++; } } else { System.err.println("You can call the program like: java -jar SecStrucComparison.jar -i_seq1 <input-file with first structure sequence (used for precision)> -i_seq2 <input-file with second structure sequence> -o <output-file>"); } }

/** * Methods that reads the input file * * @param inputfile * @throws Exception */ private static void read_file(String seq, String inputfile) throws Exception { String line; try { FileReader sfreader = new FileReader(inputfile); BufferedReader bfreader = new BufferedReader(sfreader); while ((line = bfreader.readLine()) != null) { secStruc.put(seq, line); } sfreader.close(); bfreader.close(); } catch (IndexOutOfBoundsException e) { e.printStackTrace(); }

}

/** * In the method compare the two sequences are compared on similarities. Thereby positions with '-' are ignored. * The sequences have to be represented with E, H and L. * @param seq1 * @param seq2 */ private static void compare(String seq1, String seq2) { HashMap<Character, Integer> match = new HashMap<Character, Integer>(); HashMap<Character, Integer> residues = new HashMap<Character, Integer>();

int total_match = 0; int total_res = 0;

match.put('E', 0); match.put('H', 0); match.put('L', 0); residues.put('E', 0); residues.put('H', 0); residues.put('L', 0);

for (int i = 0; i < seq1.length(); i++) { char comp = seq1.charAt(i); //the first sequence is used as reference. Only its letters are count not from the second sequence. if (comp != '-' && seq2.charAt(i) != '-') { total_res++; if (comp == seq2.charAt(i)) { total_match++; match.put(comp, match.get(comp) + 1); } residues.put(comp, residues.get(comp) + 1); } }

// As only the letters of the first are counted, there is a difference by choosing a sequence as first or second. // There is no difference for the total number. prec_E = precision(match.get('E'), residues.get('E')); prec_H = precision(match.get('H'),residues.get('H')); prec_L = precision(match.get('L'), residues.get('L')); prec_total = precision(total_match, total_res);

}

/** * method for calculating the precision: number of matches / total number of residues. */ public static double precision(int match, int total) { double prec = 0.0; prec = Math.round((Double.valueOf(match)/(Double.valueOf(total))*100)*100)/100.0; return prec; }

/** * Method that writes the outputfile: returns a list with precision for E, H, L and all three. * * @throws Exception */ private static void write_file() throws Exception { PrintWriter OUT = new PrintWriter(new FileWriter(new File(o))); OUT.println("E:\t" + prec_E); OUT.println("H:\t" + prec_H); OUT.println("L:\t" + prec_L); OUT.println("total:\t" + prec_total); OUT.close();

}

/** * Main method that let read parameters, files and starts the comparison. * @param args * @throws Exception */ public static void main(String[] args) throws Exception { getCMDargs(args); String sequence1 = "seq1"; String sequence2 = "seq2"; read_file(sequence1,i_seq1); read_file(sequence2, i_seq2); compare(secStruc.get(sequence1),secStruc.get(sequence2)); write_file(); } } </source>