NGS Exercise.3d

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Align paired end reads to the human reference genome hg19 using STAR 2.5.1a
# added in 2016


star_logo.png

STAR[1] is increasingly popular in the NGS mapping field because of its speed. For more information, please refer to the STAR web page[2] and read the manual online here[3]

mkdir -p $STAR_INDEXES/HiSeq_UCSC_hg19_100
STAR --runMode genomeGenerate \
    --genomeDir $STAR_INDEXES/HiSeq_UCSC_hg19_100 \
    --genomeFastaFiles $STAR_INDEXES/HiSeq_UCSC_hg19.fa \
    --sjdbGTFfile $STAR_INDEXES/Homo_sapiens.hg19.gtf \
    --sjdbOverhang 99

after a 2h tedious process of generating the index

Mar 03 14:06:15 ..... started STAR run
Mar 03 14:06:15 ... starting to generate Genome files
Mar 03 14:07:17 ... starting to sort Suffix Array. This may take a long time...
Mar 03 14:07:40 ... sorting Suffix Array chunks and saving them to disk...
Mar 03 16:10:18 ... loading chunks from disk, packing SA...
Mar 03 16:11:21 ... finished generating suffix array
Mar 03 16:11:21 ... Generating Suffix Array index
Mar 03 16:14:29 ... Completed Suffix Array index
Mar 03 16:14:29 ..... processing annotations GTF
Mar 03 16:14:46 ..... inserting junctions into the genome indices
Mar 03 16:23:27 ... writing Genome to disk ...
Mar 03 16:23:29 ... writing Suffix Array to disk ...
Mar 03 16:23:47 ... writing SAindex to disk
Mar 03 16:23:51 ..... finished successfully

STAR inline command help (please instead download the PDF)

Usage: STAR  [options]... --genomeDir REFERENCE   --readFilesIn R1.fq R2.fq
Spliced Transcripts Alignment to a Reference (c) Alexander Dobin, 2009-2015
 
### versions
versionSTAR             020201
    int>0: STAR release numeric ID. Please do not change this value!
versionGenome           020101 020200
    int>0: oldest value of the Genome version compatible with this STAR release. Please do not change this value!
 
### Parameter Files
parametersFiles          -
    string: name of a user-defined parameters file, "-": none. Can only be defined on the command line.
 
### System
sysShell            -
    string: path to the shell binary, preferrably bash, e.g. /bin/bash. 
                    - ... the default shell is executed, typically /bin/sh. This was reported to fail on some Ubuntu systems - then you need to specify path to bash.
 
### Run Parameters
 
runMode                         alignReads
    string: type of the run:    
                                alignReads             ... map reads
                                genomeGenerate         ... generate genome files
                                inputAlignmentsFromBAM ... input alignments from BAM. Presently only works with --outWigType and --bamRemoveDuplicates.
 
runThreadN                      1
    int: number of threads to run STAR
 
runDirPerm                      User_RWX
    string: permissions for the directories created at the run-time. 
                                User_RWX ... user-read/write/execute
                                All_RWX  ... all-read/write/execute (same as chmod 777)
 
runRNGseed                      777
    int: random number generator seed.
 
### Genome Parameters
 
genomeDir                   ./GenomeDir/
    string: path to the directory where genome files are stored (if runMode!=generateGenome) or will be generated (if runMode==generateGenome)
 
genomeLoad                NoSharedMemory
    string: mode of shared memory usage for the genome files
                          LoadAndKeep     ... load genome into shared and keep it in memory after run
                          LoadAndRemove   ... load genome into shared but remove it after run
                          LoadAndExit     ... load genome into shared memory and exit, keeping the genome in memory for future runs
                          Remove          ... do not map anything, just remove loaded genome from memory
                          NoSharedMemory  ... do not use shared memory, each job will have its own private copy of the genome
 
 
 
### Genome Generation Parameters
 
genomeFastaFiles            -
    string(s): path(s) to the fasta files with genomic sequences for genome generation, separated by spaces. Only used if runMode==genomeGenerate. These files should be plain text FASTA files, they *cannot* be zipped.
 
genomeChrBinNbits           18
    int: =log2(chrBin), where chrBin is the size of the bins for genome storage: each chromosome will occupy an integer number of bins
 
genomeSAindexNbases         14
    int: length (bases) of the SA pre-indexing string. Typically between 10 and 15. Longer strings will use much more memory, but allow faster searches.
 
genomeSAsparseD             1
    int>0: suffux array sparsity, i.e. distance between indices: use bigger numbers to decrease needed RAM at the cost of mapping speed reduction
 
genomeSuffixLengthMax       -1
    int: maximum length of the suffixes, has to be longer than read length. -1 = infinite.
 
### Splice Junctions Database
sjdbFileChrStartEnd                     -
    string(s): path to the files with genomic coordinates (chr <tab> start <tab> end <tab> strand) for the splice junction introns. Multiple files can be supplied wand will be concatenated.
 
sjdbGTFfile                             -
    string: path to the GTF file with annotations
 
sjdbGTFchrPrefix                        -
    string: prefix for chromosome names in a GTF file (e.g. 'chr' for using ENSMEBL annotations with UCSC geneomes)
 
sjdbGTFfeatureExon                      exon
    string: feature type in GTF file to be used as exons for building transcripts
 
sjdbGTFtagExonParentTranscript          transcript_id
    string: tag name to be used as exons' transcript-parents (default "transcript_id" works for GTF files)
 
sjdbGTFtagExonParentGene                gene_id
    string: tag name to be used as exons' gene-parents (default "gene_id" works for GTF files)
 
sjdbOverhang                            100
    int>0: length of the donor/acceptor sequence on each side of the junctions, ideally = (mate_length - 1)
 
sjdbScore                               2
    int: extra alignment score for alignmets that cross database junctions
 
sjdbInsertSave                          Basic
    string: which files to save when sjdb junctions are inserted on the fly at the mapping step
					Basic ... only small junction / transcript files
					All   ... all files including big Genome, SA and SAindex - this will create a complete genome directory
 
### Input Files
inputBAMfile                -
    string: path to BAM input file, to be used with --runMode inputAlignmentsFromBAM
 
### Read Parameters
 
readFilesIn                 Read1 Read2
    string(s): paths to files that contain input read1 (and, if needed,  read2)
 
readFilesCommand             -
    string(s): command line to execute for each of the input file. This command should generate FASTA or FASTQ text and send it to stdout
               For example: zcat - to uncompress .gz files, bzcat - to uncompress .bz2 files, etc.
 
readMapNumber               -1
    int: number of reads to map from the beginning of the file
                            -1: map all reads
 
readMatesLengthsIn          NotEqual
    string: Equal/NotEqual - lengths of names,sequences,qualities for both mates are the same  / not the same. NotEqual is safe in all situations.
 
readNameSeparator           /
    string(s): character(s) separating the part of the read names that will be trimmed in output (read name after space is always trimmed)
 
clip3pNbases                 0
    int(s): number(s) of bases to clip from 3p of each mate. If one value is given, it will be assumed the same for both mates.
 
clip5pNbases                 0
    int(s): number(s) of bases to clip from 5p of each mate. If one value is given, it will be assumed the same for both mates.
 
clip3pAdapterSeq            -
    string(s): adapter sequences to clip from 3p of each mate.  If one value is given, it will be assumed the same for both mates.
 
clip3pAdapterMMp            0.1
    double(s): max proportion of mismatches for 3p adpater clipping for each mate.  If one value is given, it will be assumed the same for both mates.
 
clip3pAfterAdapterNbases    0
    int(s): number of bases to clip from 3p of each mate after the adapter clipping. If one value is given, it will be assumed the same for both mates.
 
 
### Limits
 
limitGenomeGenerateRAM               31000000000
    int>0: maximum available RAM (bytes) for genome generation
 
limitIObufferSize                    150000000
    int>0: max available buffers size (bytes) for input/output, per thread
 
limitOutSAMoneReadBytes              100000
    int>0: max size of the SAM record for one read. Recommended value: >(2*(LengthMate1+LengthMate2+100)*outFilterMultimapNmax
 
limitOutSJoneRead                    1000
    int>0: max number of junctions for one read (including all multi-mappers)
 
limitOutSJcollapsed                  1000000
    int>0: max number of collapsed junctions
 
limitBAMsortRAM                         0
    int>=0: maximum available RAM for sorting BAM. If =0, it will be set to the genome index size. 0 value can only be used with --genomeLoad NoSharedMemory option.
 
limitSjdbInsertNsj                     1000000
    int>=0: maximum number of junction to be inserted to the genome on the fly at the mapping stage, including those from annotations and those detected in the 1st step of the 2-pass run
 
 
### Output: general
outFileNamePrefix               ./
    string: output files name prefix (including full or relative path). Can only be defined on the command line.
 
outTmpDir                       -
    string: path to a directory that will be used as temporary by STAR. All contents of this directory will be removed!
            - the temp directory will default to outFileNamePrefix_STARtmp
 
outStd                          Log
    string: which output will be directed to stdout (standard out)
                                Log                    ... log messages
                                SAM                    ... alignments in SAM format (which normally are output to Aligned.out.sam file), normal standard output will go into Log.std.out
                                BAM_Unsorted           ... alignments in BAM format, unsorted. Requires --outSAMtype BAM Unsorted
                                BAM_SortedByCoordinate ... alignments in BAM format, unsorted. Requires --outSAMtype BAM SortedByCoordinate
                                BAM_Quant              ... alignments to transcriptome in BAM format, unsorted. Requires --quantMode TranscriptomeSAM
 
outReadsUnmapped                None
   string: output of unmapped and partially mapped (i.e. mapped only one mate of a paired end read) reads in separate file(s).
                                None    ... no output
                                Fastx   ... output in separate fasta/fastq files, Unmapped.out.mate1/2
 
outQSconversionAdd              0
   int: add this number to the quality score (e.g. to convert from Illumina to Sanger, use -31)
 
outMultimapperOrder             Old_2.4
    string: order of multimapping alignments in the output files
                                Old_2.4             ... quasi-random order used before 2.5.0
                                Random              ... random order of alignments for each multi-mapper. Read mates (pairs) are always adjacent, all alignment for each read stay together. This option will become default in the future releases.
 
### Output: SAM and BAM
outSAMtype                      SAM
    strings: type of SAM/BAM output
                                1st word: 
                                BAM  ... output BAM without sorting
                                SAM  ... output SAM without sorting
                                None ... no SAM/BAM output
                                2nd, 3rd: 
                                Unsorted           ... standard unsorted
                                SortedByCoordinate ... sorted by coordinate. This option will allocate extra memory for sorting which can be specified by --limitBAMsortRAM.
 
outSAMmode                      Full
    string: mode of SAM output  
                                None ... no SAM output
                                Full ... full SAM output
                                NoQS ... full SAM but without quality scores
 
outSAMstrandField                               None
    string: Cufflinks-like strand field flag
                                None        ... not used
                                intronMotif ... strand derived from the intron motif. Reads with inconsistent and/or non-canonical introns are filtered out.
 
outSAMattributes                Standard
    string: a string of desired SAM attributes, in the order desired for the output SAM
                                NH HI AS nM NM MD jM jI XS ... any combination in any order
                                Standard   ... NH HI AS nM 
                                All        ... NH HI AS nM NM MD jM jI
                                None       ... no attributes
 
outSAMattrIHstart               1
    int>=0:                     start value for the IH attribute. 0 may be required by some downstream software, such as Cufflinks or StringTie.
 
outSAMunmapped                  None
    string(s): output of unmapped reads in the SAM format
                                1st word:
                                None   ... no output
                                Within ... output unmapped reads within the main SAM file (i.e. Aligned.out.sam)
                                2nd word:
                                KeepPairs ... record unmapped mate for each alignment, and, in case of unsroted output, keep it adjacent to its mapped mate.
                                              Only affects multi-mapping reads
 
outSAMorder                     Paired
    string: type of sorting for the SAM output
                                Paired: one mate after the other for all paired alignments
                                PairedKeepInputOrder: one mate after the other for all paired alignments, the order is kept the same as in the input FASTQ files
 
outSAMprimaryFlag		OneBestScore
    string: which alignments are considered primary - all others will be marked with 0x100 bit in the FLAG
                                OneBestScore ... only one alignment with the best score is primary
                                AllBestScore ... all alignments with the best score are primary
 
outSAMreadID			Standard
    string: read ID record type
                                Standard ... first word (until space) from the FASTx read ID line, removing /1,/2 from the end
                                Number   ... read number (index) in the FASTx file
 
outSAMmapqUnique        255
    int: 0 to 255: the MAPQ value for unique mappers
 
outSAMflagOR           0
    int: 0 to 65535: sam FLAG will be bitwise OR'd with this value, i.e. FLAG=FLAG | outSAMflagOR. This is applied after all flags have been set by STAR, and after outSAMflagAND. Can be used to set specific bits that are not set otherwise.
 
outSAMflagAND           65535
    int: 0 to 65535: sam FLAG will be bitwise AND'd with this value, i.e. FLAG=FLAG & outSAMflagOR. This is applied after all flags have been set by STAR, but before outSAMflagOR. Can be used to unset specific bits that are not set otherwise.
 
outSAMattrRGline        -
    string(s): SAM/BAM read group line. The first word contains the read group identifier and must start with "ID:", e.g. --outSAMattrRGline ID:xxx CN:yy "DS:z z z". 
            xxx will be added as RG tag to each output alignment. Any spaces in the tag values have to be double quoted.
            Comma separated RG lines correspons to different (comma separated) input files in --readFilesIn. Commas have to be surrounded by spaces, e.g.
            --outSAMattrRGline ID:xxx , ID:zzz "DS:z z" , ID:yyy DS:yyyy
 
outSAMheaderHD          -
    strings: @HD (header) line of the SAM header
 
outSAMheaderPG          -
    strings: extra @PG (software) line of the SAM header (in addition to STAR)
 
outSAMheaderCommentFile -
    string: path to the file with @CO (comment) lines of the SAM header
 
outSAMfilter            None
    string(s): filter the output into main SAM/BAM files
                        KeepOnlyAddedReferences ... only keep the reads for which all alignments are to the extra reference sequences added with --genomeFastaFiles at the mapping stage.
 
outSAMmultNmax          -1
    int: max number of multiple alignments for a read that will be output to the SAM/BAM files.
                        -1 ... all alignments (up to --outFilterMultimapNmax) will be output
 
outBAMcompression       1
    int: -1 to 10  BAM compression level, -1=default compression (6?), 0=no compression, 10=maximum compression
 
outBAMsortingThreadN    0
    int: >=0: number of threads for BAM sorting. 0 will default to min(6,--runThreadN).
 
### BAM processing
 
bamRemoveDuplicatesType  -
    string: mark duplicates in the BAM file, for now only works with sorted BAM feeded with inputBAMfile
                        -               ... no duplicate removal/marking
                        UniqueIdentical ... mark all multimappers, and duplicate unique mappers. The coordinates, FLAG, CIGAR must be identical
 
bamRemoveDuplicatesMate2basesN   0
    int>0: number of bases from the 5' of mate 2 to use in collapsing (e.g. for RAMPAGE)
 
### Output Wiggle
outWigType          None
    string(s): type of signal output, e.g. "bedGraph" OR "bedGraph read1_5p". Requires sorted BAM: --outSAMtype BAM SortedByCoordinate .
                    1st word:
                    None       ... no signal output
                    bedGraph   ... bedGraph format 
                    wiggle     ... wiggle format
                    2nd word:
                    read1_5p   ... signal from only 5' of the 1st read, useful for CAGE/RAMPAGE etc
                    read2      ... signal from only 2nd read
 
outWigStrand        Stranded
    string: strandedness of wiggle/bedGraph output
                    Stranded   ...  separate strands, str1 and str2
                    Unstranded ...  collapsed strands
 
outWigReferencesPrefix    -
    string: prefix matching reference names to include in the output wiggle file, e.g. "chr", default "-" - include all references
 
outWigNorm              RPM
    string: type of normalization for the signal
                        RPM    ... reads per million of mapped reads
                        None   ... no normalization, "raw" counts
 
### Output Filtering
outFilterType                   Normal
    string: type of filtering
                                Normal  ... standard filtering using only current alignment
                                BySJout ... keep only those reads that contain junctions that passed filtering into SJ.out.tab
 
outFilterMultimapScoreRange     1
    int: the score range below the maximum score for multimapping alignments
 
outFilterMultimapNmax           10
    int: maximum number of loci the read is allowed to map to. Alignments (all of them) will be output only if the read maps to no more loci than this value. 
         Otherwise no alignments will be output, and the read will be counted as "mapped to too many loci" in the Log.final.out .
 
outFilterMismatchNmax           10
    int: alignment will be output only if it has no more mismatches than this value.
 
outFilterMismatchNoverLmax      0.3
    int: alignment will be output only if its ratio of mismatches to *mapped* length is less than or equal to this value.
 
outFilterMismatchNoverReadLmax  1
    int: alignment will be output only if its ratio of mismatches to *read* length is less than or equal to this value.
 
 
outFilterScoreMin               0
    int: alignment will be output only if its score is higher than or equal to this value.
 
outFilterScoreMinOverLread      0.66
        float: same as outFilterScoreMin, but  normalized to read length (sum of mates' lengths for paired-end reads)
 
outFilterMatchNmin              0
    int: alignment will be output only if the number of matched bases is higher than or equal to this value.
 
outFilterMatchNminOverLread     0.66
    float: sam as outFilterMatchNmin, but normalized to the read length (sum of mates' lengths for paired-end reads).
 
outFilterIntronMotifs           None
    string: filter alignment using their motifs
				None                           ... no filtering
				RemoveNoncanonical             ... filter out alignments that contain non-canonical junctions
				RemoveNoncanonicalUnannotated  ... filter out alignments that contain non-canonical unannotated junctions when using annotated splice junctions database. The annotated non-canonical junctions will be kept.
 
 
 
### Output Filtering: Splice Junctions
outSJfilterReads                All
    string: which reads to consider for collapsed splice junctions output
                All: all reads, unique- and multi-mappers
                Unique: uniquely mapping reads only
 
outSJfilterOverhangMin          30  12  12  12
    4 integers:    minimum overhang length for splice junctions on both sides for: (1) non-canonical motifs, (2) GT/AG and CT/AC motif, (3) GC/AG and CT/GC motif, (4) AT/AC and GT/AT motif. -1 means no output for that motif
                                does not apply to annotated junctions
 
outSJfilterCountUniqueMin       3   1   1   1 
    4 integers: minimum uniquely mapping read count per junction for: (1) non-canonical motifs, (2) GT/AG and CT/AC motif, (3) GC/AG and CT/GC motif, (4) AT/AC and GT/AT motif. -1 means no output for that motif
                                Junctions are output if one of outSJfilterCountUniqueMin OR outSJfilterCountTotalMin conditions are satisfied
                                does not apply to annotated junctions
 
outSJfilterCountTotalMin     3   1   1   1 
    4 integers: minimum total (multi-mapping+unique) read count per junction for: (1) non-canonical motifs, (2) GT/AG and CT/AC motif, (3) GC/AG and CT/GC motif, (4) AT/AC and GT/AT motif. -1 means no output for that motif
                                Junctions are output if one of outSJfilterCountUniqueMin OR outSJfilterCountTotalMin conditions are satisfied
                                does not apply to annotated junctions
 
outSJfilterDistToOtherSJmin     10  0   5   10
    4 integers>=0: minimum allowed distance to other junctions' donor/acceptor
                                does not apply to annotated junctions
 
outSJfilterIntronMaxVsReadN        50000 100000 200000
    N integers>=0: maximum gap allowed for junctions supported by 1,2,3,,,N reads 
                                i.e. by default junctions supported by 1 read can have gaps <=50000b, by 2 reads: <=100000b, by 3 reads: <=200000. by >=4 reads any gap <=alignIntronMax
                                does not apply to annotated junctions
 
### Scoring
scoreGap                     0
    int: splice junction penalty (independent on intron motif)
 
scoreGapNoncan               -8
    int: non-canonical junction penalty (in addition to scoreGap)
 
scoreGapGCAG                 -4
    GC/AG and CT/GC junction penalty (in addition to scoreGap)
 
scoreGapATAC                 -8
    AT/AC  and GT/AT junction penalty  (in addition to scoreGap)
 
scoreGenomicLengthLog2scale   -0.25
    extra score logarithmically scaled with genomic length of the alignment: scoreGenomicLengthLog2scale*log2(genomicLength)
 
scoreDelOpen                 -2
    deletion open penalty
 
scoreDelBase                 -2
    deletion extension penalty per base (in addition to scoreDelOpen)
 
scoreInsOpen                 -2
    insertion open penalty
 
scoreInsBase                 -2
    insertion extension penalty per base (in addition to scoreInsOpen)
 
scoreStitchSJshift           1
    maximum score reduction while searching for SJ boundaries inthe stitching step
 
 
### Alignments and Seeding
 
seedSearchStartLmax             50
    int>0: defines the search start point through the read - the read is split into pieces no longer than this value
 
seedSearchStartLmaxOverLread    1.0
    float: seedSearchStartLmax normalized to read length (sum of mates' lengths for paired-end reads)
 
seedSearchLmax       0
    int>=0: defines the maximum length of the seeds, if =0 max seed lengthis infinite
 
seedMultimapNmax      10000
    int>0: only pieces that map fewer than this value are utilized in the stitching procedure
 
seedPerReadNmax       1000
    int>0: max number of seeds per read
 
seedPerWindowNmax     50
    int>0: max number of seeds per window
 
seedNoneLociPerWindow    10 
    int>0: max number of one seed loci per window
 
alignIntronMin              21
    minimum intron size: genomic gap is considered intron if its length>=alignIntronMin, otherwise it is considered Deletion
 
alignIntronMax              0
    maximum intron size, if 0, max intron size will be determined by (2^winBinNbits)*winAnchorDistNbins
 
alignMatesGapMax            0
    maximum gap between two mates, if 0, max intron gap will be determined by (2^winBinNbits)*winAnchorDistNbins
 
alignSJoverhangMin          5
    int>0: minimum overhang (i.e. block size) for spliced alignments
 
alignSJstitchMismatchNmax   0 -1 0 0
    4*int>=0: maximum number of mismatches for stitching of the splice junctions (-1: no limit). 
                            (1) non-canonical motifs, (2) GT/AG and CT/AC motif, (3) GC/AG and CT/GC motif, (4) AT/AC and GT/AT motif.
 
alignSJDBoverhangMin        3
    int>0: minimum overhang (i.e. block size) for annotated (sjdb) spliced alignments
 
alignSplicedMateMapLmin     0
    int>0: minimum mapped length for a read mate that is spliced
 
alignSplicedMateMapLminOverLmate 0.66
    float>0: alignSplicedMateMapLmin normalized to mate length
 
alignWindowsPerReadNmax     10000
    int>0: max number of windows per read
 
alignTranscriptsPerWindowNmax       100
    int>0: max number of transcripts per window           
 
alignTranscriptsPerReadNmax               10000
    int>0: max number of different alignments per read to consider
 
alignEndsType           Local
    string: type of read ends alignment
                        Local           ... standard local alignment with soft-clipping allowed
                        EndToEnd        ... force end-to-end read alignment, do not soft-clip
                        Extend5pOfRead1 ... fully extend only the 5p of the read1, all other ends: local alignment
 
alignSoftClipAtReferenceEnds Yes
    string: allow the soft-clipping of the alignments past the end of the chromosomes
                        Yes ... allow
                        No  ... prohibit, useful for compatibility with Cufflinks
 
### Windows, Anchors, Binning
 
winAnchorMultimapNmax           50
    int>0: max number of loci anchors are allowed to map to
 
winBinNbits                     16
    int>0: =log2(winBin), where winBin is the size of the bin for the windows/clustering, each window will occupy an integer number of bins. 
 
winAnchorDistNbins              9
    int>0: max number of bins between two anchors that allows aggregation of anchors into one window
 
winFlankNbins               4
    int>0: log2(winFlank), where win Flank is the size of the left and right flanking regions for each window
 
 
 
### Chimeric Alignments
chimOutType                 SeparateSAMold
    string: type of chimeric output
                            SeparateSAMold  ... output old SAM into separate Chimeric.out.sam file
                            WithinBAM       ... output into main aligned BAM files (Aligned.*.bam)
 
chimSegmentMin              0
    int>=0: minimum length of chimeric segment length, if ==0, no chimeric output
 
chimScoreMin                0
    int>=0: minimum total (summed) score of the chimeric segments
 
chimScoreDropMax            20
    int>=0: max drop (difference) of chimeric score (the sum of scores of all chimeric segements) from the read length
 
chimScoreSeparation         10
    int>=0: minimum difference (separation) between the best chimeric score and the next one
 
chimScoreJunctionNonGTAG    -1
    int: penalty for a non-GT/AG chimeric junction
 
chimJunctionOverhangMin     20
    int>=0: minimum overhang for a chimeric junction
 
chimSegmentReadGapMax       0
    int>=0: maximum gap in the read sequence between chimeric segments
 
chimFilter                  banGenomicN
    string(s): different filters for chimeric alignments
                            None ... no filtering
                            banGenomicN ... Ns are not allowed in the genome sequence around the chimeric junction
 
### Quantification of Annotations
quantMode                   -
    string(s): types of quantification requested
                            -                ... none
                            TranscriptomeSAM ... output SAM/BAM alignments to transcriptome into a separate file
                            GeneCounts       ... count reads per gene
 
quantTranscriptomeBAMcompression    1       1
    int: -1 to 10  transcriptome BAM compression level, -1=default compression (6?), 0=no compression, 10=maximum compression
 
quantTranscriptomeBan       IndelSoftclipSingleend
    string: prohibit various alignment type
                            IndelSoftclipSingleend  ... prohibit indels, soft clipping and single-end alignments - compatible with RSEM
                            Singleend               ... prohibit single-end alignments
 
### 2-pass Mapping
twopassMode                 None
    string: 2-pass mapping mode.
                            None        ... 1-pass mapping
                            Basic       ... basic 2-pass mapping, with all 1st pass junctions inserted into the genome indices on the fly
 
twopass1readsN              -1
    int: number of reads to process for the 1st step. Use very large number (or default -1) to map all reads in the first step.
 
For more details see:
<https://github.com/alexdobin/STAR>
<https://github.com/alexdobin/STAR/blob/master/doc/STARmanual.pdf>

download exercise files

Download exercise files here

Use the right application to open the files present in ex3e-files

References:
  1. Alexander Dobin, Carrie A Davis, Felix Schlesinger, Jorg Drenkow, Chris Zaleski, Sonali Jha, Philippe Batut, Mark Chaisson, Thomas R Gingeras
    STAR: ultrafast universal RNA-seq aligner.
    Bioinformatics: 2013, 29(1);15-21
    [PubMed:23104886] ##WORLDCAT## [DOI] (I p)

  2. https://github.com/alexdobin/STAR
  3. https://github.com/alexdobin/STAR/blob/master/doc/STARmanual.pdf

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