| 1.C.61 The Streptococcus pyogenes Streptolysin S (Streptolysin S) Family Streptolysin S of Streptococcus pyogenes is a small protein of 53 aas encoded by the pel/sagA gene. It probably contains a 17 aa leader sequence that is processed to a 36 aa polypeptide that is the key constituent of Streptolysin S. Antibodies against a C-terminal region of SagA prevents pore formation and hemolysis of sheep erythrocytes. This oxygen stable hemolysin mediates β-hemolysis. The protein exhibits a single TMS (residues 19-36 in the unprocessed 53 aa protein). It has no homologues in the current databases.
The transport reaction catalyzed by Streptolysin S is: small molecules (in)  small molecules (out).
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| References: |
Carr, A., D.D. Sledjeski, A. Podbielski, M.D.P. Boyle, and B. Kreikemeyer. (2001). Similarities between complement-mediated and streptolysin S-mediated hemolysis. J. Biol. Chem. 276: 41790-41796.
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Molloy, E.M., P.D. Cotter, C. Hill, D.A. Mitchell, and R.P. Ross. (2011). Streptolysin S-like virulence factors: the continuing sagA. Nat. Rev. Microbiol. 9: 670-681.
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| Examples: |
| TC# | Name | Organismal Type | Example |
| 1.C.61.1.1 | Streptolysin S, SagA of 53 aas | Gram-positive bacteria | SagA of Streptococcus pyogenes |
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| 1.C.61.1.2 | Streptolysin S family bacteriocin of 55 aas (Molloy et al. 2011). | | Streptolysin S of Streptococcus iniae |
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| 1.C.61.1.3 | Clostridolysin BstA family, TOMM peptide of 52 aas | | Clostridolysin, BstA of Clostridiaceae bacterium |
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| 1.C.61.1.4 | Streptolysin S family bacteriocin of 50 aas | | Streptolysin-like protein of Clostridium gasigenes |
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