“Database resources of the National Center for Biotechnology Information”
by Eric W Sayers, Jeff Beck, J Rodney Brister, Evan E Bolton, Kathi Canese et al. (PMID: 31602479)
The National Center for Biotechnology Information (NCBI) provides a large suite of online resources for biological information and data, including the GenBank® nucleic acid sequence database and the PubMed database of citations and abstracts published in life science journals. The Entrez system provides search and retrieval operations for most of these data from 38 distinct databases. This article provides a brief overview of the NCBI Entrez system of databases, followed by a summary of resources that were either introduced or significantly updated in the past year, including PubMed, PMC, Bookshelf, BLAST databases and more!
When there is an outbreak of dengue fever in the world, it’s critical that viral genomic sequence data be submitted by researchers and made available to analyze as soon as possible. You can now submit Dengue virus sequences to GenBank using a new workflow (Figure 1) in the Submission Portal designed to help make these data available as soon as possible. The streamlined process, similar to the one described in a previous post for animal mitochondrial COX1 sequences, has an improved interface, enhanced validation, and automatic annotation that saves you time and effort.
Figure 1. The Submission Portal pages for targeted sequence submission workflows. Top panel. The new submission page for entering the workflow. Bottom panel. Submission Portal page with the Dengue virus submission option selected (boxed in red). The service has options for other targeted submissions including mitochondrial COX1 from multicellular animals (metazoa), ribosomal RNA (rRNA), rRNA-ITS, Influenza virus, and Norovirus sequences.
This update is part of a larger and ongoing effort to consolidate GenBank submissions in a central location. In addition to Dengue virus data, you can also submit Influenza A, B, C and Norovirus sequences as well as other targeted sequences including mitochondrial COX1 genes from multicellular animals (metazoa), ribosomal RNA (rRNA), and rRNA-ITS through the options on the Submission Portal. You should submit other types of sequence data including other virus sequences to GenBank using BankIt or tbl2ASN.
You can use the search feature on the Submission Portal to find the appropriate submission tool for your data.
Get rapid access to Wuhan coronavirus (2019-nCoV) sequence data from the current outbreak as it becomes available. We will continue to update the page with newly released data.
The complete annotated genome sequence of the novel coronavirus associated with the outbreak of pneumonia in Wuhan, China is now available from GenBank for free and easy access by the global biomedical community. Figure 1 shows the relationship of the Wuhan virus to selected coronaviruses.
Figure 1. Phylogenetic tree showing the relationship of Wuhan-Hu-1 (circled in red) to selected coronaviruses. Nucleotide alignment was done with MUSCLE 3.8. The phylogenetic tree was estimated with MrBayes 3.2.6 with parameters for GTR+g+i. The scale bar indicates estimated substitutions per site, and all branch support values are 99.3% or higher.
GenBank release 235.0 (12/11/2019) is now available on the NCBI FTP site. This release has 7 trillion bases and 1.74 billion records.
The current release has 215,333,020 traditional records containing 388,417,258,009 base pairs of sequence data. There are also 1,127,023,870 WGS records containing 6,277,551,200,690 base pairs of sequence data, 367,193,844 bulk-oriented TSA records containing 325,433,016,129 base pairs of sequence data, and 28,227,180 bulk-oriented TLS records containing 11,280,596,614 base pairs of sequence data.
GenBank submitters, you can now submit mitochondrial COX1 (cytochrome oxidase subunit I; COI) sequence data from multicellular animals (metazoa) using a new workflow (Figure 1) with an improved interface, enhanced validation, and automatic COX1 CDS feature annotation. Once you have submitted mitochondrial COX1 data using this tool, you’ll have a single, helpful page to reference your submission information: accession number(s), COX1 submission status, relevant files and more. Plus, you can also fix any errors from this page.
Figure 1. Submission Portal page with the mitochondrial COX1 submission option selected (boxed in red). The service has options for other targeted submissions including ribosomal RNA (rRNA), rRNA-ITS, Influenza virus, and Norovirus sequences.
Do you need a quick way to annotate features on a similar set of sequences for your GenBank submission? You can now submit sequences from the same region or gene in an alignment format in BankIt and use the new ‘Feature propagation option’ (Figure 1) to apply features from a single sequence to other aligned sequences. You simply annotate one sequence and then copy that annotation across all the sequences in your submission.
Here’s how you can propagate features in three easy steps:
A new version of the Prokaryotic Genome Annotation Pipeline (PGAP) is now available on GitHub. This release uses a new and improved version of tRNAscan (tRNAscan-SE:2.0.4) and includes our most up-to-date Hidden Markov Model and BlastRule collections for naming proteins.
Remember that you can submit the results of PGAP to GenBank. Or, if you are still improving the assembly and your genome doesn’t pass the pre-annotation validation, you can use the –ignore-all-errors mode to get a preliminary annotation.
GenBank release 234.0 (10/14/2019) is now available on the NCBI FTP site. This release has 6.69 trillion bases and 1.68 billion records.
The release has 216,763,706 traditional records containing 386,197,018,538 base pairs of sequence data. There are also 1,097,629,174 WGS records containing 5,985,250,251,028 base pairs of sequence data, 342,811,151 bulk-oriented TSA records containing 305,371,891,408 base pairs of sequence data, and 27,460,978 bulk-oriented TLS records containing 10,848,455,369 base pairs of sequence data.
Validation issues can delay the processing of your submissions to GenBank. To avoid one type of delay, use the new “expected genome size” API to check the length of your genome assembly before submission.
The API compares the size of submitted genome assemblies to the expected genome size range for the species to identify outliers that can result from errors such as:
incorrect organism assignment
metagenome submitted as an organism genome
targeted sub-genome assembly not flagged as partial genome representation
gross contamination with other sequences
You can check in advance for these possible problems using the API. The API accepts the taxid for the species (taxid = Taxonomy ID – see our Taxonomy quick start guide on how to find the taxid for a given species) and the length of your assembly (excluding gaps and runs of Ns) as input and returns XML with the expected length, the acceptable range, and a status that tells you whether your assembly is too large, too small, or within the acceptable range. Look for <length_status>within_range</length_status> which confirms that your sequence passes the test!