What are RefSeq genomes?

RefSeq genomes are copies of selected assembled genomes available in GenBank. RefSeq transcript and protein records are generated by several processes including: Computation. Eukaryotic Genome Annotation Pipeline. Prokaryotic Genome Annotation Pipeline.

What is RefSeq and why was it used?

RefSeq records use the gene symbols and protein names provided by the original INSDC submission, collaborating or other authoritative groups, including UniProtKB and the Enzyme Commission, or the official nomenclature authority for an organism, if available.

What is BLAST bioinformatics?

BLAST is an acronym for Basic Local Alignment Search Tool and refers to a suite of programs used to generate alignments between a nucleotide or protein sequence, referred to as a “query” and nucleotide or protein sequences within a database, referred to as “subject” sequences.

What is a representative genome?

Representative genomes. For species without a reference genome, one assembly per defined species is selected as representative. No representatives are selected for undefined species such as ‘Vibrio sp.

What is the difference between RefSeq and Gen bank?

GenBank sequence records are owned by the original submitter and cannot be altered by a third party. RefSeq sequences are not part of the INSDC but are derived from INSDC sequences to provide non-redundant curated data representing our current knowledge of known genes.

How do you read an accession number?

An accession number applies to the complete record and is usually a combination of a letter(s) and numbers, such as a single letter followed by five digits (e.g., U12345) or two letters followed by six digits (e.g., AF123456).

What is curated sequence?

A curated record contains information that is drawn together by a third party (a curator) from a variety of sources and encapsulates the knowledge available for a single gene. It is similar to a review article.

Why are there 3 possible reading frames?

Each of these 2 x 3 = 6 possibilities is called a reading frame. Because three of the 64 possible DNA triplets correspond to mRNA stop codons, a DNA sequence read at random will have stop triplets approximately once in every 20 triplets.

How many bacterial genomes are in NCBI?

1), growing another hundredfold—that is, there are more than 30,000 sequenced bacterial genomes currently publically available in 2014 (NCBI 2014) and thousands of metagenome projects (GOLD 2014). Projects such as the Genomic Encyclopedia of Bacteria and Archaea (GEBA) (Kyrpides et al.

How is blast used to identify gene families?

The program compares nucleotide or protein sequences to sequence databases and calculates the statistical significance of matches. BLAST can be used to infer functional and evolutionary relationships between sequences as well as help identify members of gene families.

Where can I find the RefSeq genome online?

RefSeq is accessible via BLAST , Entrez, and the NCBI FTP site ( RefSeq releases , and RefSeq Genomes ). Information is also available in NCBI’s Assembly, Genomes and Gene resources, and for some organisms additional information is available in NCBI’s genome browser Map Viewer .

How does blast find similarity between protein sequences?

BLAST finds regions of similarity between biological sequences. The program compares nucleotide or protein sequences to sequence databases and calculates the statistical significance. Learn more. The Basic Local Alignment Search Tool (BLAST) finds regions of local similarity between sequences.

How are RefSeq transcripts and protein records generated?

RefSeq genomes are copies of selected assembled genomes available in GenBank. RefSeq transcript and protein records are generated by several processes including: Propagation from annotated genomes that are submitted to members of the International Nucleotide Sequence Database Collaboration (INSDC)