I have a SNP sequence with the following format:
aaaaaaaaaaaaaaaaaaaaabbbbbbbbbbaaaaaaaabbbbbbbbbbbbaaaaaaaaaabbbbbbbaaaa
How can I convert it into the fasta format?
The FASTA format can be used for either nucleic acid or amino acid sequences. It has to start with a greater-than symbol (>) followed by a single-line description, the description can be anything you like and you can use empty spaces and symbols like brackets, etc..., but there can be no space between the greater-than symbol and the first letter/symbol of the description. The description line shouldn't be longer than 80 characters. The sequence itself starts on the next line after the description line. You can sometimes include spaces if you like and even numbers in the sequence part of the FASTA file (the spaces and numbers are used to make it easier to count residues), however, everything but the letters of the single letter code of amino acids and nucleic acids will generally be ignored by programmes that read FASTA files. This means that all the "b" in the sequence you've provided will be ignored as there is no amino acid or nucleotide called b or B. Generally it's best to not use spaces or numbers and simply stick to the letters. It doesn't matter if you use capital letters or small letters, but the convention is to use capital letters for amino acid code and small letters for nucleic acid code. For example:
>accession name or number | 123456 | TITLE | other stuff [The organism]
aaaaaaaaaaaaaaaaaaaaabbbbbbbbbbaaaaaaaabbbbbbbbbbbbaaaaaaaaaabbbbbbbaaaa
BTW, there isn't an empty line between the description and the sequence lines in this example, it just looks like there is one because of the way ResearchGate formats lines in these text boxes.
Hi, Ensi
you can use some of online tool to convert your either DNA or amino acid sequence in any format to fasta format
http://www.ebi.ac.uk/Tools/sfc/readseq/
http://genome.nci.nih.gov/tools/reformat.html
As antonia explained about rules for FASTA format, its applicable to all kinds of formating.
if you are not familiar with formatting, you just do with the online conversion tools.
all the best
regards Murugan N
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