Simkaniaceae is a family of bacteria in the order Chlamydiales, class Chlamydiia, phylum Chlamydiota, domain Bacteria. Species in this family have a chlamydia-like cycle of replication and their ribosomal RNA genes are 80–90% identical to ribosomal genes in the Chlamydiaceae. The Simkaniaceae are not recognized by monoclonal antibodies that are specific for Chlamydiaceae lipopolysaccharide. The family Simkaniaceae currently includes two genera: Simkania and Fritschea. The type species is Simkania negevensis, and its natural host is not known. It is readily grown in monolayers of eukaryotic Vero cells. Serological evidence and PCR indicate that S. negevensis is widespread among humans.
Two Fritschea species have been identified in insects. These are candidatus species because they only grow in insect bacteriocytes and have not been cultured in vitro. Whiteflies are the host of Candidatus Fritschea bemisiae (strain Falk). Scale insects are the host of Candidatus Fritschea eriococci (strain Elm).
Simkania negevensis and Fritschea bemisiae have a group I intron in the 23S rRNA, unlike other characterized chlamydial rRNA genes. The introns are closely related to group I introns in the 23S rRNA of chloroplasts and mitochondria in algae and amoebae.
The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN)[1] and National Center for Biotechnology Information (NCBI)[2]
Simkaniaceae is a family of bacteria in the order Chlamydiales, class Chlamydiia, phylum Chlamydiota, domain Bacteria. Species in this family have a chlamydia-like cycle of replication and their ribosomal RNA genes are 80–90% identical to ribosomal genes in the Chlamydiaceae. The Simkaniaceae are not recognized by monoclonal antibodies that are specific for Chlamydiaceae lipopolysaccharide. The family Simkaniaceae currently includes two genera: Simkania and Fritschea. The type species is Simkania negevensis, and its natural host is not known. It is readily grown in monolayers of eukaryotic Vero cells. Serological evidence and PCR indicate that S. negevensis is widespread among humans.
Two Fritschea species have been identified in insects. These are candidatus species because they only grow in insect bacteriocytes and have not been cultured in vitro. Whiteflies are the host of Candidatus Fritschea bemisiae (strain Falk). Scale insects are the host of Candidatus Fritschea eriococci (strain Elm).
Simkania negevensis and Fritschea bemisiae have a group I intron in the 23S rRNA, unlike other characterized chlamydial rRNA genes. The introns are closely related to group I introns in the 23S rRNA of chloroplasts and mitochondria in algae and amoebae.
Simkaniaceae es una familia de bacterias del orden Chlamydiales. Las especies de esta familia tienen un ciclo de replicación de tipo chlamydia y sus genes ARNr son en un 80–90% idénticos a los de Chlamydiaceae. Las Simkaniaceae no se reconocen por los anticuerpos monoclonales que detectan los lipopolisacáridos de Chlamydiaceae. La familia Simkaniaceae actualmente incluye dos géneros: Simkania y Fritschea. La especie tipo es Simkania negevensis cuyo huésped natural es desconocido. Crece fácilmente en monocapas de células Vero. Evidencias serólogicas y PCR indican que S. negevensis se encuentra extensamente presente en los seres humanos.
Dos especies de Fritschea han sido identificadas en insectos. Estas son especies candidatus puesto que solo crecen en insectos bacteriocitos y todavía no han sido cultivados in vitro. Las moscas blancas son los huéspedes de Candidatus Fritschea bemisiae (cepa Falk). Hemiptera es el huésped de Candidatus Fritschea eriococci (cepa Elm).
Simkania negevensis y Fritschea bemisiae tienen un intrón de grupo I en el ARNr 23S, en contraste con otros genes ARNr chlamydiales caracterizados. Estos intrones están íntimamente relacionados con los intrones de grupo I del ARNr 23S de cloroplastos y mitocondrias de algas y amebas.
Datos: Q7517905
Especies: Simkaniaceae
