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Phi11 holin family

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The Phi11 Holin (φ11 Holin) Family (TC# 1.E.11) constitutes the Holin Superfamily I.

One characterized member of this family, pneumococcal EJ-1 phage holin (EJh; TC# 1.E.11.1.3), is a hydrophobic peptide of 85 amino acyl residues in length (aas) with 2 putative transmembrane segments (TMSs) displaying lethal inner membrane disruptive activity. The synthetic N-terminal TMS flanked by its N-terminal positively charged residues folds into a transmembrane α-helix that increases the membrane permeability. Oligomeric channels of various sizes form depending on the peptide to lipid ratio. By atomic force microscopy, peptide-induced membrane holes can be seen.

A representative list of proteins belonging to the φ11 holin family can be found in the Transporter Classification Database.

See also

Further reading

References

  1. Reddy, Bhaskara L.; Saier, Milton H. (2013-11-01). "Topological and phylogenetic analyses of bacterial holin families and superfamilies". Biochimica et Biophysica Acta (BBA) - Biomembranes. 1828 (11): 2654–2671. doi:10.1016/j.bbamem.2013.07.004. ISSN 0006-3002. PMC 3788059. PMID 23856191.
  2. Diaz, E.; Munthali, M.; Lunsdorf, H.; Holtje, J. V.; Timmis, K. N. (1996-02-01). "The two-step lysis system of pneumococcal bacteriophage EJ-1 is functional in gram-negative bacteria: triggering of the major pneumococcal autolysin in Escherichia coli". Molecular Microbiology. 19 (4): 667–681. doi:10.1046/j.1365-2958.1996.399929.x. ISSN 0950-382X. PMID 8820638. S2CID 22961185.
  3. Haro, Amparo; Vélez, Marisela; Goormaghtigh, Erik; Lago, Santiago; Vázquez, Jesús; Andreu, David; Gasset, María (2003-02-07). "Reconstitution of holin activity with a synthetic peptide containing the 1-32 sequence region of EJh, the EJ-1 phage holin". The Journal of Biological Chemistry. 278 (6): 3929–3936. doi:10.1074/jbc.M211334200. ISSN 0021-9258. PMID 12464609.
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As of 10 March 2016, this article is derived in whole or in part from Transporter Classification Database (TCDB). The copyright holder has licensed the content in a manner that permits reuse under CC BY-SA 3.0 and GFDL. All relevant terms must be followed. The original text was at "1.E.11 The φ11 Holin (φ11 Holin) Family"

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