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  About the UCSC Genome Bioinformatics Site

Welcome to the UCSC Genome Browser website. This site contains the reference sequence and working draft assemblies for a large collection of genomes. It also provides portals to ENCODE data at UCSC (2003 to 2012) and to the Neandertal project. Download or purchase the Genome Browser source code, or the Genome Browser in a Box (GBiB) at our online store.

We encourage you to explore these sequences with our tools. The Genome Browser zooms and scrolls over chromosomes, showing the work of annotators worldwide. The Gene Sorter shows expression, homology and other information on groups of genes that can be related in many ways. Blat quickly maps your sequence to the genome. The Table Browser provides convenient access to the underlying database. VisiGene lets you browse through a large collection of in situ mouse and frog images to examine expression patterns. Genome Graphs allows you to upload and display genome-wide data sets.

The UCSC Genome Browser is developed and maintained by the Genome Bioinformatics Group, a cross-departmental team within the UC Santa Cruz Genomics Institute and the Center for Biomolecular Science and Engineering (CBSE) at the University of California Santa Cruz (UCSC). If you have feedback or questions concerning the tools or data on this website, feel free to contact us on our public mailing list.

The Genome Browser project team relies on public funding to support our work. Donations are welcome -- we have many more ideas than our funding supports! If you have ideas, drop a comment in our suggestion box.

Give to the UCSC Genome Browser

  NewsFollow @GenomeBrowser on Twitter Genome Browser Facebook page

To receive announcements of new genome assembly releases, new software features, updates and training seminars by email, subscribe to the genome-announce mailing list. Please see our blog for posts about Genome Browser tools, features, projects and more.


11 February 2015 - dbSNP 142 Available for hg19 and hg38

We are pleased to announce the release of four tracks derived from NCBI dbSNP Build 142 data, available on the two most recent human assemblies GRCh37/hg19 and GRCh38/hg38. The new tracks contain a substantial amount of additional annotation data not included in previous dbSNP tracks, with corresponding coloring and filtering options in the Genome Browser.

There are four SNP tracks available as part of this release. One is a track containing all mappings of reference SNPs to the human assembly, labeled "All SNPs (142)". The other three tracks are subsets of this track and show interesting and easily defined subsets of dbSNP:

  • Common SNPs (142): uniquely mapped variants that appear in at least 1% of the population or are 100% non-reference
  • Flagged SNPs (142): uniquely mapped variants, excluding Common SNPs, that have been flagged by dbSNP as "clinically associated"
  • Mult. SNPs (142): variants that have been mapped to more than one genomic location

By default, only the Common SNPs (142) are visible; other tracks must be made visible using the track controls. You will find the other SNPs (142) tracks on both of GRCh37/hg19 and GRCh38/hg38 browsers in the "Variation" group.

The tracks were produced at UCSC by Angie Hinrichs and Jonathan Casper. We'd like to thank the dbSNP group at NCBI for providing access to these data.


2 Febuary 2015 - Host a Genome Browser Workshop

New timeslots are now available to host a Genome Browser workshop at your institution. Thanks to the funding support of NHGRI, we offer hands-on Genome Browser training onsite at your institution, tailored to your audience's level of expertise.

For more information or to submit a request to host a workshop, please visit our signup.


23 January 2015 - Genome Browser YouTube Channel

We are pleased to announce the release of the UCSC Genome Browser YouTube channel. The channel contains short videos showing how to use the Genome Browser and associated tools to solve selected problems. The videos were produced by Robert Kuhn and Pauline Fujita, with assistance from Luvina Guruvadoo, Jonathan Casper, Matt Speir and the rest of the Browser staff.

See also the other materials on our training page.

If you have any comments or questions - including requests for future video topics - please send them to our training group at:

ucscgbtraining@soe. ucsc. edu


15 January 2015 - Proteomics Data Now Available in Genome Browser

We are pleased to announce the release of proteomics data for the human hg19 assembly. Data from the National Cancer Institute's (NCI) Clinical Proteomic Tumor Analysis Consortium (CPTAC) is now available in the UCSC Genome Browser as a public track hub. This track hub contains peptides that were identified by CPTAC in their deep mass spectrometry based characterization of the proteome content of breast, colorectal and ovarian cancer biospecimens that were initially sequenced by The Cancer Genome Atlas. This effort extends the accessibility of CPTAC data to more researchers and provides an additional level of analysis to assist the cancer biology community.

To access and view this hub, navigate to the Track Hub gateway page and select "CPTAC Hub v1" from the Public Hubs list. Please direct any queries to the Fenyo Lab at info@fenyolab.org.

In addition, we have also released a PeptideAtlas track which displays peptide identifications from the PeptideAtlas August 2014 (Build 433) Human build. This build, based on 971 samples containing more than 420 million spectra, identified over a million distinct peptides covering more than 15,000 canonical proteins. To read more about this track, please see the track description page. Many thanks to Eric Deutsch, Zhi Sun, and the PeptideAtlas team at the Institute for Systems Biology, Seattle for providing this data.


15 January 2015 - Proteomics Data Now Available in Genome Browser: We are pleased to announce the release of proteomics data for the human hg19 assembly. Data from the National Cancer Institute's (NCI) Clinical Proteomic Tumor Analysis Consortium (CPTAC) is now available in the UCSC Genome Browser as a public track hub. Read more.

19 December 2014 - New Cow (bosTau8) Assembly Now Available in the Genome Browser: We are pleased to announce the release of a Genome Browser for the June 2014 assembly of cow, Bos taurus (Bos_taurus_UMD 3.1.1, UCSC version bosTau8). Read more.

12 December 2014 - New D. melanogaster (dm6) Assembly Now Available in the Genome Browser: We are pleased to announce the release of a Genome Browser for the August 2014 assembly of Drosophila melanogaster (BDGP Release 6, UCSC version dm6). Read more.


  Conditions of Use

The Genome Browser software, sequence and annotation data are freely available for use with these conditions. A license is required for commercial use of the software. For assistance with questions or problems regarding the UCSC Genome Browser software, database, genome assemblies, or release cycles, click here.

Program-driven use of this software is limited to a maximum of one hit every 15 seconds and no more than 5,000 hits per day.

The UCSC Genome Browser was created by the Genome Bioinformatics Group of UC Santa Cruz. Software Copyright (c) The Regents of the University of California. All rights reserved.