tRNAscan-SE 2.0.9 (July 2021) Copyright © 2020 Patricia Chan and Todd Lowe
University of California Santa Cruz
Freely distributed under the GNU General Public License (GPLv3)
Scan a sequence file for tRNAs
-- default: use Infernal & tRNA covariance models
with eukaryotic sequences (use 'Search Mode Options' below to scan other types of sequences)
Search Mode Options:
-E : search for eukaryotic tRNAs (default)
-B : search for bacterial tRNAs
-A : search for archaeal tRNAs
-M <model>
: search for mitochondrial tRNAs options: mammal, vert
-O : search for other organellar tRNAs
-G : use general tRNA model (cytoslic tRNAs from all 3 domains included)
--mt <model>
: use mito tRNA models for cytosolic/mito detemination (if not specified, only cytosolic
isotype-specific model scan will be performed)
-I : search using Infernal default use with -E, -B, -A, or -G; optional for -O--max : maximum sensitivity mode - search using Infernal without hmm filter (very slow)
-L : search using the legacy method (tRNAscan, EufindtRNA, and COVE) use with -E, -B, -A or -G-C--cove
: search using COVE analysis only (legacy, extremely slow) default use with -O-H--breakdown
: show breakdown of primary and secondary structure components to covariance model bit scores
-D--nopseudo
: disable pseudogene checking
Output options:
-o--output <file>
: save final results in <file>
-f--struct <file>
: save tRNA secondary structures to <file>
-s--isospecific <file>
: save results using isotype-specific models in <file>
-m--stats <file>
: save statistics summary for run in <file> (speed, # tRNAs found in each part of search, etc)
-b--bed <file>
: save results in BED file format of <file>
-j--gff <file>
: save results in GFF3 file format of <file>
-a--fasta <file>
: save predicted tRNA sequences in FASTA file format of <file>
-l--log <file>
: save log of program progress in <file>
--detail
: display prediction outputs in detailed view
--brief
: brief output format (no column headers)
-? # : '#' in place of <file> chooses default name for output files
-p--prefix <label>
: use <label> prefix for all default output file names
-d--progress
: display program progress messages
-q--quiet
: quiet mode (credits & run option selections suppressed)
-y--hitsrc
: show origin of hits (Ts=tRNAscan 1.4, Eu=EufindtRNA, Bo=Both Ts and Eu, Inf=Infernal)
Specify Alternate Cutoffs / Data Files:
-X--score <score>
: set cutoff score (in bits) for reporting tRNAs (default=20)
-g--gencode <file>
: use alternate genetic codes specified in <file> for determining tRNA type
-z--pad <number>
: use <number> nucleotides padding when passing first-pass tRNA bounds predictions to CM analysis
(default=8)
--len <length>
: set max length of tRNA intron+variable region for legacy search mode (default=116bp)
Misc Options:
-h--help
: print this help message
-c--conf <file>
: tRNAscan-SE configuration file (default: tRNAscan-SE.conf)
-Q--forceow
: do not prompt user before overwriting pre-existing result files (for batch processing)
--match <EXPR>
: search only sequences with names matching <EXPR> string (<EXPR> may contain * or ? wildcard
chars)
--search <EXPR>
: start search at sequence with name matching <EXPR> string and continue to end of input sequence
file(s)
Special Advanced Options (for testing & special purposes)
-U : search for tRNAs with alternate models defined in configuration file
-t--tscan
: search using tRNAscan only (defaults to strict params)
--tmode <mode>
: explicitly set tRNAscan params, where <mode>=R or S (R=relaxed, S=strict tRNAscan v1.3 params)
-v--verbose <file>
: save verbose tRNAscan 1.3 output to <file>
--nomerge
: Keep redundant tRNAscan 1.3 hits (don't filter out multiple predictions per tRNA identification)
-e--eufind
: search using Eukaryotic tRNA finder (EufindtRNA) only (defaults to Normal seach parameters when
run alone, or to Relaxed search params when run with Cove)
--emode <mode>
: explicitly set EufindtRNA params, where <mode>=R, N, or S (relaxed, normal, or strict)
--iscore <score>
: manually set "intermediate" cutoff score for EufindtRNA
-r--fsres <file>
: save first-pass scan results from EufindtRNA, tRNAscan, or Infernal hmm in <file> in tabular
results format
--mid : fast scan mode - search using Infernal with mid-level strictness of hmm filter
-F--falsepos <file>
: save first-pass candidate tRNAs in <file> that were then found to be false positives by
second-pass analysis
--missed <file>
: save all seqs that do NOT have at least one tRNA prediction in them (aka "missed" seqs)
--thread <number>
: number of threads used for running infernal (default is to use available threads)