compbio.data.sequence
Class SequenceUtil

java.lang.Object
  compbio.data.sequence.SequenceUtil

public final class SequenceUtil
extends java.lang.Object

Utility class for operations on sequences

Author:

pvtroshin Date September 2009

Field Summary

static java.util.regex.Pattern	AA Valid Amino acids
static java.util.regex.Pattern	AMBIGUOUS_AA Same as AA pattern but with two additional letters - XU
static java.util.regex.Pattern	AMBIGUOUS_NUCLEOTIDE Ambiguous nucleotide
static java.util.regex.Pattern	DIGIT A digit
static java.util.regex.Pattern	NON_AA inversion of AA pattern
static java.util.regex.Pattern	NON_NUCLEOTIDE Non nucleotide
static java.util.regex.Pattern	NONWORD Non word
static java.util.regex.Pattern	NUCLEOTIDE Nucleotides a, t, g, c, u
static java.util.regex.Pattern	WHITE_SPACE A whitespace character: [\t\n\x0B\f\r]

Method Summary

static java.lang.String	cleanSequence(java.lang.String sequence) Removes all whitespace chars in the sequence string
static java.lang.String	deepCleanSequence(java.lang.String sequence) Removes all special characters and digits as well as whitespace chars from the sequence
static boolean	isAmbiguosProtein(java.lang.String sequence) Check whether the sequence confirms to amboguous protein sequence
static boolean	isNonAmbNucleotideSequence(java.lang.String sequence) Ambiguous DNA chars : AGTCRYMKSWHBVDN // differs from protein in only one (!) - B char
static boolean	isNucleotideSequence(FastaSequence s)
static boolean	isProteinSequence(java.lang.String sequence)
static java.util.List<FastaSequence>	readFasta(java.io.InputStream inStream) Reads fasta sequences from inStream into the list of FastaSequence objects
static void	writeFasta(java.io.OutputStream os, java.util.List<FastaSequence> sequences) Writes FastaSequence in the file, each sequence will take one line only
static void	writeFasta(java.io.OutputStream outstream, java.util.List<FastaSequence> sequences, int width) Writes list of FastaSequeces into the outstream formatting the sequence so that it contains width chars on each line

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

WHITE_SPACE

public static final java.util.regex.Pattern WHITE_SPACE

A whitespace character: [\t\n\x0B\f\r]

DIGIT

public static final java.util.regex.Pattern DIGIT

A digit

NONWORD

public static final java.util.regex.Pattern NONWORD

Non word

AA

public static final java.util.regex.Pattern AA

Valid Amino acids

NON_AA

public static final java.util.regex.Pattern NON_AA

inversion of AA pattern

AMBIGUOUS_AA

public static final java.util.regex.Pattern AMBIGUOUS_AA

Same as AA pattern but with two additional letters - XU

NUCLEOTIDE

public static final java.util.regex.Pattern NUCLEOTIDE

Nucleotides a, t, g, c, u

AMBIGUOUS_NUCLEOTIDE

public static final java.util.regex.Pattern AMBIGUOUS_NUCLEOTIDE

Ambiguous nucleotide

NON_NUCLEOTIDE

public static final java.util.regex.Pattern NON_NUCLEOTIDE

Non nucleotide

Method Detail

isNucleotideSequence

public static boolean isNucleotideSequence(FastaSequence s)

Returns:

true is the sequence contains only letters a,c, t, g, u

isNonAmbNucleotideSequence

public static boolean isNonAmbNucleotideSequence(java.lang.String sequence)

Ambiguous DNA chars : AGTCRYMKSWHBVDN // differs from protein in only one (!) - B char

cleanSequence

public static java.lang.String cleanSequence(java.lang.String sequence)

Removes all whitespace chars in the sequence string

Parameters:

sequence -

Returns:

cleaned up sequence

deepCleanSequence

public static java.lang.String deepCleanSequence(java.lang.String sequence)

Removes all special characters and digits as well as whitespace chars from the sequence

Parameters:

sequence -

Returns:

cleaned up sequence

isProteinSequence

public static boolean isProteinSequence(java.lang.String sequence)

Parameters:

sequence -

Returns:

true is the sequence is a protein sequence, false overwise

isAmbiguosProtein

public static boolean isAmbiguosProtein(java.lang.String sequence)

Check whether the sequence confirms to amboguous protein sequence

Parameters:

sequence -

Returns:

return true only if the sequence if ambiguous protein sequence Return false otherwise. e.g. if the sequence is non-ambiguous protein or DNA

writeFasta

public static void writeFasta(java.io.OutputStream outstream,
                              java.util.List<FastaSequence> sequences,
                              int width)
                       throws java.io.IOException

Writes list of FastaSequeces into the outstream formatting the sequence so that it contains width chars on each line

Parameters:

outstream -

sequences -

width - - the maximum number of characters to write in one line

Throws:

java.io.IOException

readFasta

public static java.util.List<FastaSequence> readFasta(java.io.InputStream inStream)
                                               throws java.io.IOException

Reads fasta sequences from inStream into the list of FastaSequence objects

Parameters:

inStream - from

Returns:

list of FastaSequence objects

Throws:

java.io.IOException

writeFasta

public static void writeFasta(java.io.OutputStream os,
                              java.util.List<FastaSequence> sequences)
                       throws java.io.IOException

Writes FastaSequence in the file, each sequence will take one line only

Parameters:

os -

sequences -

Throws:

java.io.IOException