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Las actinoporinas constituyen una familia de proteínas tóxicas sintetizadas por anémonas marinas. Son proteínas pequeñas, básicas y normalmente sin cisteínas. Pertenecen al grupo de las toxinas formadoras de poros (PFT en inglés) y su actividad [...]texto impreso
Alm, Ida ; García Linares, Sara ; Gavilanes, José G. ; Martínez del Pozo, Álvaro ; Slotte, J. Peter | Elsevier | 2015-04The pore forming capacity of Sticholysin II (StnII; isolated from Stichodactyla helianthus) in bilayer membranes containing 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC), palmitoylsphingomyelin (PSM) and either cholesterol or palmitoyl[...]texto impreso
Palacios Ortega, Juan ; García Linares, Sara ; Rivera de la Torre, Esperanza ; Gavilanes, José G. ; Martínez del Pozo, Álvaro ; Slotte, J. Peter | ACS | 2017In this study, we examined the influence of bilayer thickness on the activity of the actinoporin toxins sticholysin I and II (StnI and StnII) at 25 °C. Bilayer thickness was varied using dimonounsaturated phosphatidylcholine (PC) analogues (with[...]texto impreso
Rivera de la Torre, Esperanza ; Palacios Ortega, Juan ; Slotte, J. Peter ; Gavilanes, José G. ; Martínez del Pozo, Álvaro ; García Linares, Sara | MDPI | 2020-11Venoms constitute complex mixtures of many different molecules arising from evolution in processes driven by continuous prey–predator interactions. One of the most common compounds in these venomous cocktails are pore-forming proteins, a family [...]texto impreso
Rivera de Torre, Esperanza ; Palacios Ortega, Juan ; García Linares, Sara ; Gavilanes, José G. ; Martínez del Pozo, Álvaro | Elsevier | 2017-12Sticholysins I and II (StnI and StnII), ?-pore forming toxins from the sea anemone Stichodactyla helianthus, are water-soluble toxic proteins which upon interaction with lipid membranes of specific composition bind to the bilayer, extend and ins[...]texto impreso
Rivera de la Torre, Esperanza ; Palacios Ortega, Juan ; Gavilanes, José G. ; Martínez del Pozo, Álvaro ; García Linares, Sara | MDPI | 2019Animal venoms are complex mixtures of highly specialized toxic molecules. Cnidarians and arachnids produce pore-forming proteins (PFPs) directed against the plasma membrane of their target cells. Among PFPs from cnidarians, actinoporins stand ou[...]texto impreso
Palacios Ortega, Juan ; García Linares, Sara ; Astrand, Mia ; Abdullah Al Sazzad, Md. ; Gavilanes, José G. ; Martínez del Pozo, Álvaro ; Slotte, J. Peter | ACS | 2016Sticholysin II (StnII) is a pore-forming toxin that uses sphingomyelin (SM) as the recognition molecule in targeting membranes.After StnII monomers bind to SM, several toxin monomers act in concert to oligomerize into a functional pore. The regu[...]texto impreso
García Linares, Sara ; Maula, Terhi ; Rivera de la Torre, Esperanza ; Gavilanes, José G. ; Slotte, J.Peter ; Martínez del Pozo, Álvaro | American Chemical Society | 2016Actinoporins are pore-forming toxins from sea anemones. Upon interaction with sphingomyelin-containing bilayers, they become integral oligomeric membrane structures that form a pore. Sticholysin II from Stichodactyla helianthus contains five try[...]texto impreso
Palacios Ortega, Juan ; García Linares, Sara ; Rivera de la Torre, Esperanza ; Gavilanes, José G. ; Martínez del Pozo, Álvaro ; Slotte, J. Peter | Elsevier | 2019-06-18Actinoporins are a group of soluble toxic proteins that bind to membranes containing sphingomyelin (SM) and oligomerize to form pores. Sticholysin II (StnII) is a member of the actinoporin family, produced by Stichodactyla helianthus. Cholestero[...]texto impreso
Rivera de Torre, Esperanza ; García Linares, Sara ; Alegre Cebollada, Jorge ; Lacadena, Javier ; Gavilanes, José G. ; Martínez del Pozo, Álvaro | American Society for Biochemistry and Molecular Biology | 2016-04-27Among the toxic polypeptides secreted in the venom of sea anemones, actinoporins are pore forming toxins whose toxic activity relies on the formation of oligomeric pores within biological membranes. Intriguingly, actinoporins appear as multigene[...]texto impreso
Rivera de la Torre, Esperanza ; García Linares, Sara ; Alegre Cebollada, Jorge ; Lacadena, Javier ; Gavilanes, José G. ; Martínez del Pozo, Álvaro | ASBMB American Society for Biochemistry and Molecular Biology | 2016Among the toxic polypeptides secreted in the venom of sea anemones, actinoporins are the pore-forming toxins whose toxic activity relies on the formation of oligomeric pores within biological membranes. Intriguingly, actinoporins appear as multi[...]texto impreso
García Ortega, Lucía ; Alegre Cebollada, Jorge ; García Linares, Sara ; Bruix, Marta ; Martínez del Pozo, Álvaro ; Gavilanes, José G. | Elsevier | 2011-09Actinoporins constitute a group of small and basic ?-pore forming toxins produced by sea anemones. They display high sequence identity and appear as multigene families. They show a singular behaviour at the water-membrane interface: In aqueous s[...]texto impreso
García Linares, Sara ; Rivera de la Torre, Esperanza ; Palacios Ortega, Juan ; Gavilanes, José G. ; Martínez del Pozo, Álvaro | Eslsevier | 2017Sea anemones produce venoms containing different toxic molecules. Among them, actinoporins are some of the best characterized ones. They constitute a family of toxic polypeptides that belong to the much larger group of pore-forming toxins. Actin[...]texto impreso
García Linares, Sara ; Palacios Ortega, Juan ; Yasuda, Tomokazu ; Astrand, Mia ; Gavilanes, José G. ; Martínez del Pozo, Álvaro ; Slotte, J. Peter | Elsevier | 2016-03-11Sticholysin I and II (StnI and StnII) are pore-forming toxins that use sphingomyelin (SM) for membrane binding. We examined how hydrogen bonding among membrane SMs affected the StnI- and StnII-induced pore formation process, resulting in bilayer[...]
