The genomes table (Figure 1) now offers filters for:
Reference genomes — switch it on to only show reference or representative genomes
Annotated — switch it on to only show annotated genomes
Assembly level — use the assembly level slider to select higher-quality genomes
Year released — use the slider to limit your results to recent genomes
In addition, the new Actions column connects you to NCBI’s Genome Data Viewer, BLAST, and Assembly. The Text filter box lets you search by the name of the assembly, species/infraspecies, or submitter.Figure 1. The new Datasets Genomes page with primate assemblies showing the STATUS switches (reference genomes, annotated); expanded filters section with ASSEMBLY LEVEL and YEAR RELEASED sliding selectors; and the Actions column menu with access to Assembly details, BLAST, the Genome Data Viewer, and Download options. Continue reading “Introducing the new NCBI Datasets Genomes page”→
Join us on June 2, 2021 at 12PM eastern time to learn how to how to upload and display your own genomic data in the context of annotated genome assemblies. You will use the Genome Data Viewer and the Sequence viewer to visualize your own uploaded data (indexed BAM, VCF, BED, wig, GFF formats), data from public track hubs, and your BLAST and Primer-BLAST results. You will also learn to take advantage of features of the viewers including optimizing display settings, sharing a view with collaborators, exporting images, and downloading genes or other features in the view.
Date and time: Wed, June 2, 2021 12:00 PM – 12:45 PM EDT
Missed our latest YouTube videos? Scroll down to see what we’ve been up to.
Add Preprint Citations in My Bibliography
The National Institutes of Health encourages investigators to post preprints to public repositories in order to speed the dissemination and enhance the rigor of their work. This video demonstrates how to add preprint citations to My Bibliography.
NCBI RefSeq has finished its initial annotation of the new rat reference assembly, mRatBN7.2, recently released by the Darwin Tree of Life Project at the Wellcome Sanger Institute. This is the first coordinate-changing update to the rat reference since the 2014 release of Rnor_6.0 from the Rat Genome Sequencing Consortium and brings the rat assembly into the modern age with a nearly 300x increase in contig N50 and 9x increase in scaffold N50 lengths. It’s a major improvement!
Are you a researcher who works on gene biology and are interested in alternative splice patterns in your gene or genes of interest? If so, be sure to explore the intron feature evidence available in graphics views of genome assemblies annotated by NCBI. You can view the NCBI evidence used for calling splice variant for genes, add other intron feature evidence tracks, and use new display and filter options that make it easier to interpret the data .
Figure 1. Graphical view of the monoamine oxidase gene (MAOA, MOAB) region on the human X chromosome showing intron features tracks (‘RNA-seq intron features, aggregate’ and ‘Intropolis RNA-Seq intron features’). Mousing-over an intron feature activates a tooltip that shows details such as the number of reads with the splice site, the location on the chromosome, the length of the intron and the donor and acceptor bases at the splice site. The Intropolis track was added through the search feature of the Configure Tracks menu and configured (bottom menu) so that the features were sorted by strand and filtered so that only features with greater than 500 reads appear.
Are you interested in searching for a chromosomal region in a genome, but don’t know how to write the correct query? The good news is that the NCBI Genome Data Viewer (GDV) now supports a much wider array of search options. Some examples are listed below:
chr2: 1.5M – 2M
3: 21.33M – 22.01M
chr1:1,500,000 / 200
You can use any of these queries or the ones described below for assembly aliases either on the GDV landing page or in the GDV search box (Figure 1).
The COVID-19 pandemic has drawn attention to the human host genes associated with SARS-CoV-2 entry and to the elements that regulate expression of these genes. At NCBI, we have prioritized curation of experimentally validated regulatory elements for these genes in the RefSeq Functional Elements project. Our annotations include several enhancers, promoters, cis-regulatory elements and protein binding sites, among other feature types. We have annotated 236 regulatory features for 27 distinct biological regions in the latest human Annotation Release (109.20200522) including regulatory elements for the ABO, ACE2, ANPEP, CD209, CLEC4G, CLEC4M, CTSL, DPP4,and TMPRSS2genes.
You can view our regulatory element to target gene linkages in the regulatory interactions track using our new track hub that we recently announced. You can also see the biological regions and features tracks. These have functional and descriptive metadata, including biological region summaries, experimental evidence types, publication support and more.
The example in Figure 1 shows RefSeq Functional Element feature annotation in NCBI’s Genome Data Viewer (GDV) for the ABO gene region (GRCh38, NW_009646201.1: 73,864-103,789) the determiner of the human ABO blood group. A genome-wide association study recently identified non-coding ABO variants associated with COVID-19 disease severity (PMID:32558485), which map to some of the RefSeq Functional Elements in this region.Figure 1. The human ABO gene region in the NCBI GDV displaying the RefSeq Functional Element features. The biological regions aggregate track shows underlying feature annotation for an ABO upstream enhancer (LOC112637023), promoter region (LOC112679202), +5.8 intron 1 enhancer (LOC112679198), a 3′ regulatory region (LOC112639999), and a +36.0 downstream enhancer (LOC112637025). Functional Element features include numerous enhancers, promoters, cis-regulatory elements and protein / transcription factor binding sites.
We have more information about RefSeq Functional Elements on our website, including data download and extraction options. Stay tuned to NCBI Insights and other NCBI social media for future announcements about RefSeq Functional Elements!
You can now view SNP variation data for many commonly studied animals and plants – including mouse, cow, Drosophila, Arabidopsis, maize, cabbage, and many more – in the Genome Data Viewer (GDV) and other graphical sequence viewers. This data is streamed from the European Variation Archive (EVA) at the European Bioinformatics Institute (EBI).
On any NCBI graphical sequence view you can use the Configure Tracks menu and the Track Configuration Panel to add the track for the EVA RefSNP data. This track is available through the left-hand tab for Remote Variation Data (Figure 1). The EVA RefSNP track displayed on the pig (Sus scrofa) chromosome 12 graphical view is shown in Figure 2.
Figure 1. The Track Configuration panel showing the Remote Variation Data tab and he EVA RefSNP Release 1 track. Select the track checkbox and click Configure to load the track.
Figure 2. The graphical sequence viewer showing the region of the growth hormone gene on pig chromosome 12 (NC_010454.4) with the EVA RefSNP Release 1 track at the bottom. The track header has an (R) and a green highlight to indicate that it is remote data streamed from an external website. NCBI is not responsible for the content or availability of these data.
Please contact us using the Feedback link on the graphical view to let us know what you think and how we can further improve your experience with the NCBI genome browsers and graphical sequence viewers
dbVar, NCBI’s database of large-scale genetic variants, has a new track hub for viewing and downloading structural variation (SV) data in popular genome browsers. Initial tracks include Clinical and Common SV datasets. dbVar’s new track hub can be viewed using NCBI’s Genome Data Viewer through the “User Data and Track Hubs” feature (Figure 1) and other genome browsers by selecting “dbVar Hub” from the list of public tracks or by specifying the following URL.