LOCUS       sequence-256435-         435 bp    DNA     linear   UNA 15-DEC-2025
DEFINITION  Expresses SpyCatcher003 S49C in bacterial cytoplasm, with a unique 
            cysteine for chemical coupling.
ACCESSION   .
VERSION     .
KEYWORDS    .
SOURCE      natural DNA sequence
  ORGANISM  unspecified
REFERENCE   1  (bases 1 to 435)
  AUTHORS   Keeble AH, Turkki P, Stokes S, Khairil Anuar INA, Rahikainen R, 
            Hytonen VP, Howarth M
  TITLE     Approaching infinite affinity through engineering of peptide-protein
            interaction.
  JOURNAL   Proc Natl Acad Sci U S A. 2019 Dec 10. pii: 1909653116. doi: 
            10.1073/pnas.1909653116.
  PUBMED    31822621
REFERENCE   2  (bases 1 to 435)
  AUTHORS   .
  TITLE     Direct Submission
  JOURNAL   Exported Dec 15, 2025 from SnapGene Server 8.0.1
            https://www.snapgene.com
COMMENT     SGRef: number: 1; type: "Journal Article"; journalName: "Proc Natl 
            Acad Sci U S A. 2019 Dec 10. pii: 1909653116. doi: 
            10.1073/pnas.1909653116."
COMMENT     Sequence Label: SpyCatcher003 S49C
FEATURES             Location/Qualifiers
     source          1..435
                     /mol_type="genomic DNA"
                     /organism="unspecified"
     CDS             13..30
                     /codon_start=1
                     /product="6xHis affinity tag"
                     /label=6xHis
                     /translation="HHHHHH"
     CDS             52..72
                     /codon_start=1
                     /product="tobacco etch virus (TEV) protease recognition and
                     cleavage site"
                     /label=TEV site
                     /translation="ENLYFQG"
     CDS             79..417
                     /codon_start=1
                     /product="improved SpyCatcher variant that reacts with 
                     SpyTag003 at a rate approaching the diffusion limit (Keeble
                     et al., 2019)"
                     /label=SpyCatcher003
                     /translation="VTTLSGLSGEQGPSGDMTTEEDSATHIKFSKRDEDGRELAGATME
                     LRDCSGKTISTWISDGHVKDFYLYPGKYTFVETAAPDGYEVATPIEFTVNEDGQVTVDG
                     EATEGDAHT"
ORIGIN
        1 atgtcgtact accatcacca tcaccatcac gattacgaca tcccaacgac cgaaaacctg
       61 tattttcagg gcgccatggt aaccacctta tcaggtttat caggtgagca aggtccgtcc
      121 ggtgatatga caactgaaga agatagtgct acccatatta aattctcaaa acgtgatgag
      181 gacggccgtg agttagctgg tgcaactatg gagttgcgtg attgctctgg taaaactatt
      241 agtacatgga tttcagatgg acatgtgaag gatttctacc tgtatccagg aaaatataca
      301 tttgtcgaaa ccgcagcacc agacggttat gaggtagcaa ctccaattga atttacagtt
      361 aatgaggacg gtcaggttac tgtagatggt gaagcaactg aaggtgacgc tcatactgga
      421 tccagtggta gctaa
//
