Genbank Download Fasta

[Venessa Serr]

Do you mean multiple sequences per genbank file/record? It looks like it would be easy to add, as you did, but this is one reason I would probably use a Bio* library in practice because messing with genbank files can get complicated given that there are so many variations. This change is not complicated but it is hard to write a simple parser that works on all genbank files.

Hi, I am very new to Qiime2 and I would like to create a classifier for the pmoA gene. I downloaded a .fasta and.tax file from an online database [pmoA gene reference database (fasta-formatted sequences and taxonomy)] .

genbank download fasta

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pkmnsandy it looks like the files you have consist of a selection of genbank accessions... so you can reformat the taxonomy file to re-download all sequences and formatted taxonomies using RESCRIPt. Why do this? It would give you a little more control (if you want) in deciding which taxonomic ranks you are interested in, and preserve that information in QIIME 2 provenance. Also, you would avoid needing to manually edit the sequences file.

Spine identifies a core genome from input genomic sequences. Sequences are aligned using Nucmer and regions found to be in common between all or a user-defined subset of genomes will be returned. Sequences can be given in fasta (Example) or genbank (Example) format. Core and accessory genes will only be output if all sequences input are in annotated genbank format with locus_tag tags for each CDS and in a single molecule, i.e. no contigs.

getgenbank retrieves nucleotide informationfrom the GenBank database. This database is maintained by theNational Center for Biotechnology Information (NCBI). For more detailsabout the GenBank database, see

getgenbank(AccessionNumber) displaysinformation in the MATLAB Command Window without returning datato a variable. The displayed information is only hyperlinks to theURLs used to search for and retrieve the data.

getgenbank(..., 'PropertyName', PropertyValue,...) calls getgenbank with optional propertiesthat use property name/property value pairs. You can specify one ormore properties in any order. Each PropertyName mustbe enclosed in single quotation marks and is case insensitive. Theseproperty name/property value pairs are as follows:

Data = getgenbank(...,'PartialSeq', PartialSeqValue, ...) returnsthe specified subsequence in the Sequence fieldof the MATLAB structure. PartialSeqValue isa two-element array of integers containing the start and end positionsof the subsequence [StartBP, EndBP]. StartBP isan integer between 1 and EndBP. EndBP isan integer between StartBP and the lengthof the sequence.

Data = getgenbank(...,'ToFile', ToFileValue, ...) saves the data returned from the GenBank database to a file. ToFileValue is a character vector or string specifying either a file name or a path and file name for saving the GenBank data. If you specify only a file name, the file is saved to the MATLAB Current Folder. The function does not append data to an existing file. Instead, it overwrites the contents of the existing file without warning.

Data = getgenbank(...,'FileFormat', FileFormatValue, ...) returnsthe sequence in the specified format. Choices are 'GenBank' or 'FASTA'.When 'FASTA', then Data containsonly two fields, Header and Sequence. 'GenBank' isthe default when SequenceOnlyValue is false. 'FASTA' isthe default when SequenceOnlyValue is true.

On NCBI's website, GFF3 files only contain annotation and not the nucleotide sequence so cannot be used. You need to download the GenBank files plus nucleotide sequence and convert them. When downloading, click on the show sequence option, Update View then Send to a File of type GenBank. You can then use the Bio::Perl script bp_genbank2gff3.pl to convert to GFF3. Just be aware that mixing different gene prediction methods and annotation pipelines can give noisier results.

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