Ciro Santilli @cirosantilli  40

 Incoming links: `wc` (unix)

E. Coli K-12 MG1655 Updated 2026-10-19

NCBI taxonomy entry: www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?id=511145 This links to:

genome: www.ncbi.nlm.nih.gov/genome/?term=txid511145 From there there are links to either:
- Download the FASTA: "Download sequences in FASTA format for genome, protein"
  For the genome, you get a compressed FASTA file with extension .fna called GCF_000005845.2_ASM584v2_genomic.fna that starts with:
  >NC_000913.3 Escherichia coli str. K-12 substr. MG1655, complete genome AGCTTTTCATTCTGACTGCAACGGGCAATATGTCTCTGTGTGGATTAAAAAAAGAGTGTCTGATAGCAGCTTCTGAACTG
  Using wc as in wc GCF_000005845.2_ASM584v2_genomic.fna gives 58022 lines, in Vim we see that each line is 80 characters, except for the final one which is 52. So we have 58020 * 80 + 52 = 4641652 =~ 4.6 Mbp
- Interactively browse the sequence on the browser viewer: "Reference genome: Escherichia coli str. K-12 substr. MG1655" which eventually leads to: www.ncbi.nlm.nih.gov/nuccore/556503834?report=graph
  If we zoom into the start, we hover over the very first gene/protein: the famous (just kidding) e. Coli K-12 MG1655 gene thrL, at position 190-255.
  The second one is the much more interesting e. Coli K-12 MG1655 gene thrA.
- Gene list, with a total of 4,629 as of 2021: www.ncbi.nlm.nih.gov/gene/?term=txid511145

KEGG entry: www.genome.jp/pathway/eco01100+M00022

BioCyc promoter database query URL: biocyc.org/group?id=:ALL-PROMOTERS&orgid=ECOLI

 Read the full article