New bigNarrowPeak format

[Brian Lee]

We're happy to announce support for a new binary indexed track type called bigNarrowPeak (http://genome.ucsc.edu/goldenPath/help/bigNarrowPeak.html).

This new track type joins the ranks of other recent "big" track types: bigMaf, bigChain, bigPsl, and bigGenePred

With bigNarrowPeak, any narrowPeak files that were previously already made into bigBeds in the past with the bedToBigBed utility and the proper narrowPeak.as definitions should now display just as though they were narrowPeak custom tracks. For example here is a file from the ENCODE 2012 AWG Hub that can be pasted into the Custom Tracks page:

track type=bigNarrowPeak visibility=full db=hg19 name="nPk" description="AWG ENCODE narrowPeak Example" bigDataUrl=http://ftp.ebi.ac.uk/pub/databases/ensembl/encode/integration_data_jan2011/byDataType/peaks/jan2011/spp/optimal/hub/spp.optimal.wgEncodeOpenChromChipGm12878Pol2AlnRep0_VS_wgEncodeOpenChromChipGm12878InputAln.bb

These tracks and also support additional filter options for their additional fields (see more here http://genome.ucsc.edu/goldenPath/help/bigNarrowPeak.html#example3).  For example here is an example with filter definitions that can be pasted into the Custom Tracks page:

track type=bigNarrowPeak name="bigNarrowPeak Example Filter" description="A bigNarrowPeak file with additional Filter Settings" signalFilter=0 signalFilterLimits=0:18241 pValueFilter=2 pValueFilterLimits=0:300 qValueFilter=2 qValueFilterLimits=0:300 bigDataUrl=http://genome.ucsc.edu/goldenPath/help/examples/bigNarrowPeak.bb

Credit for the implementation of this new feature goes to Brian Raney.