Editing header by adding "pipe" in fasta file

Question

I want to edit my headers in fasta file by adding pipes but unable to do so. The header looks like this

KX035646.1 Name:NADH domain ATGCGGGGCTGC..

I want it like

sp|KX035646.1| Name:NADH domain

The accession number is different for all sequences Can you please help me doing it? Thanks

Answer 1

You can try a simple sed one liner:

cat test.fasta
>KX035646.1 Name:NADH domain ATGCGGGGCTGC..
ACGT
CTTT
>KX035646.2 Name:NADH domain ATGCGGGGCTGC..43214
GCAT

sed 's/^>\([a-zA-Z0-9.]\+\)\(.*\)/>sp|\1|\2/' test.fasta
>sp|KX035646.1| Name:NADH domain ATGCGGGGCTGC..
ACGT
CTTT
>sp|KX035646.2| Name:NADH domain ATGCGGGGCTGC..43214
GCAT