info:eu-repo/semantics/article
A Lineage of Begomoviruses Encode Rep and AC4 Proteins of Enigmatic Ancestry: Hints on the Evolution of Geminiviruses in the New World
Autor
SANDRA ILIANA TORRES HERRERA
ANGELICA ROMERO OSORIO
OSCAR ALBERTO MORENO VALENZUELA
GUILLERMO PASTOR PALACIOS
Yair Cardenas-Conejo
Jorge Ramiez_Prado
Lina Riego-Ruiz
YERENI MINERO GARCIA
Salvador Ambriz Granados
Gerardo Rafael Argüello Astorga
Resumen
The begomoviruses (BGVs) are plant pathogens that evolved in the Old World during the Cretaceous and arrived to the New World (NW) in the Cenozoic era. A subgroup of NW BGVs, the “Squash leaf curl virus (SLCV) lineage” (S-Lin), includes viruses with unique characteristics. To get clues on the evolutionary origin of this lineage, a search for divergent members was undertaken. Four novel BGVs were characterized, including one that is basal to the group. Comparative analyses led to discover a ~670 bp genome module that is nearly exclusive of this lineage, encompassing the replication origin, the AC4 gene, and 480 bp of the Rep gene. A similar DNA module was found in two curtoviruses, hence suggesting that the S-Lin ancestor acquired its distinctive genomic segment by recombination with a curtovirus. This hypothesis was definitely disproved by an in-depth sequence analysis. The search for homologs of S-Lin Rep uncover the common origin of Rep proteins encoded by diverse Geminiviridae genera and viral “fossils” integrated at plant genomes. In contrast, no homolog of S-Lin Rep was found in public databases. Consequently, it was concluded that the SLCV clade ancestor evolved by a recombination event between a primitive NW BGV and a virus from a hitherto unknown lineage
Materias
Ítems relacionados
Mostrando ítems relacionados por Título, autor o materia.
-
Preparación de materiales compuestos mediante la funcionalización covalente de nanotubos de carbono (CNTs) con polímero
CLAUDIA GUADALUPE ESPINOSA GONZALEZ -
Attachment of transition metal nanoparticles on nitrogen doped carbon nanotubes (MWNTs-CNx) and their further reactions.
XAVIER NORBERTO LEPRÓ CHÁVEZ -
Alternativas sustentables para uso de residuos de explotación de tobas volcánicas en materiales de construcción
REBECA GUADALUPE ORTIZ MENA; MARIA GUADALUPE NAVARRO ROJERO; T. LOPEZ-LARA; Juan Bosco Hernández Zaragoza; DANIEL NAPOLEON GOMEZ BALBUENA