Conserved Domain Search (CD Search) results now show domain architecture information and other annotations that further characterize predicted domain and protein function. These include links to PubMed, Gene Ontology (GO) terms, Enzyme Commission (EC) numbers, and the SPARCLE Domain Architecture Viewer. You can use these links on the results to find literature (PubMed), assign biological roles and protein function (GO and EC), and find proteins with the same domain architecture (Domain Architecture Viewer). These annotations are currently available for a limited number of architectures, but we will continue to add them as part of our curation effort.
Figure 1 shows the results of an example CD Search showing these new links. Note that you can use the GO and EC information provided to retrieve protein models with these annotations from the Protein Family Models database, for example GO:0030246[GOTermId] — molecular function carbohydrate binding or 220.127.116.11[ECNumber] — non-specific serine/threonine protein kinase.
Figure 1. Conserved Domain Database search results for a hypothetical protein (XP_007132600.1) from the common bean (Phaseolus vulgaris). The results classify the protein as a plant receptor-like protein kinase. The results also show the EC number and the GO terms associated with this domain architecture, a link to a PubMed citation for the protein family (receptor-like protein kinases), and a link to the Domain Architecture Viewer for G-type lectin S-receptor-like serine/threonine-protein kinases. The Domain Architecture Viewer shows other proteins from the NCBI databases with the same domain architecture (order, number and types of domains). Continue reading “Announcing new links and annotations on Conserved Domain Search results!”
The new Protein Family Model resource (Figure 1) provides a way for you to search across the evidence used by the NCBI annotation pipelines to name and classify proteins. You can find protein families by gene symbol, protein function, and many other terms. You have access to related proteins in the family and publications describing members. Protein Family Models includes protein profile hidden Markov models (HMMs) and BlastRules for prokaryotes, and conserved domain architectures for prokaryotes and eukaryotes. The HMMs in the collection include Pfam models, TIGRFAMs as well as models developed at NCBI either de novo, or from NCBI protein clusters. Each of the BlastRules (PMCID: 5753331) consists of one or more model proteins of known biological function with BLAST identity and coverage cutoffs. The conserved domain architectures are based on BLAST-compatible Position Specific Score Matrices (PSSMs) that constitute the NCBI Conserved Domain database.Figure 1. Protein Family Model resource pages. Top panel. Home page. Middle panel, selected results summaries from a fielded search for the DnaK gene product (DnaK[Gene Symbol]). Bottom panel, a portion of an HMM record for DnaK derived from NCBI Protein Clusters (NF009946). The record also includes PubMed citations and HMMER analyses showing the RefSeq proteins named by this method.
Continue reading “The Protein Family Model resource is now available!”
The 2020 Nucleic Acids Research database issue features papers from NCBI staff on GenBank, ClinVar and more. These papers are also available on PubMed. To read an article, click on the PMID number listed below.
“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!
Continue reading “Read about NCBI resources in 2020 Nucleic Acids Research database issue”