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Staphylococcus aureus alpha toxin information


Alpha-hemolysin
Alpha toxin from S. aureus (PDB: 7ahl​).
Identifiers
OrganismStaphylococcus aureus
Symbolhly
Alt. symbolshla, Alpha-toxin
PDB7AHL
UniProtP09616
Search for
StructuresSwiss-model
DomainsInterPro

Alpha-toxin, also known as alpha-hemolysin (Hla), is the major cytotoxic agent released by bacterium Staphylococcus aureus and the first identified member of the pore forming beta-barrel toxin family.[1] This toxin consists mostly of beta-sheets (68%) with only about 10% alpha-helices. The hly gene on the S. aureus chromosome encodes the 293 residue protein monomer, which forms heptameric units on the cellular membrane to form a complete beta-barrel pore. This structure allows the toxin to perform its major function, development of pores in the cellular membrane, eventually causing cell death.

  1. ^ Bhakdi S, Tranum-Jensen J (December 1991). "Alpha-toxin of Staphylococcus aureus". Microbiological Reviews. 55 (4): 733–51. doi:10.1128/mr.55.4.733-751.1991. PMC 372845. PMID 1779933.

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