Connecting actin monomers by iso-peptide bond is a toxicity mechanism of the Vibrio cholerae MARTX toxin.
Kudryashov, D.S., Durer, Z.A., Ytterberg, A.J., Sawaya, M.R., Pashkov, I., Prochazkova, K., Yeates, T.O., Loo, R.R., Loo, J.A., Satchell, K.J., Reisler, E.(2008) Proc Natl Acad Sci U S A 105: 18537-18542
- PubMed: 19015515 
- DOI: 10.1073/pnas.0808082105
- Primary Citation of Related Structures:  
3CJB, 3CJC - PubMed Abstract: 
The Gram-negative bacterium Vibrio cholerae is the causative agent of a severe diarrheal disease that afflicts three to five million persons annually, causing up to 200,000 deaths. Nearly all V. cholerae strains produce a large multifunctional-autoprocessing RTX toxin (MARTX(Vc)), which contributes significantly to the pathogenesis of cholera in model systems ...