Coding

Part:BBa_K1647020

Designed by: Yun Xue   Group: iGEM15_WHU-China   (2015-09-15)

AAP2, a kind of antimicrobial peptides

The antimicrobial peptide, AAP2, can achieve high activity exclusively at low environmental pH to target bacterial species like Streptococcus mutans that produce acid and thrive under the low pH conditions detrimental for tooth integrity. However, at pH 7.5, it has no effect on cell viability. There are only six histidine(His) and eight phenylalanine(Phe) residues present in the AAP2. The pH-responsiveness of AAP2 has been attributed to the presence of multiple His which enable the conformational flexibility necessary to transition from the less effective more general membrane disruptive α-helical form at close to neutral pH to its substantially more active random coil conformation at low pH. The hydrophobicity necessary for membrane interaction is provided by Phe groups which in contrast to other hydrophobic amino acids allow for the conformational flexibility needed for the pH-dependent antimicrobial activity of AAP2.

AAP2 structure.png


Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    COMPATIBLE WITH RFC[25]
  • 1000
    COMPATIBLE WITH RFC[1000]


[edit]
Categories
//collections/antimicrobial
Parameters
None