title: ELG1, a regulator of genome stability, has a role in telomere length regulation and in silencing.
abstract: Telomeres, the natural ends of eukaryotic chromosomes, prevent the loss of chromosomal sequences and preclude their recognition as broken DNA. Telomere length is kept under strict boundaries by the action of various proteins, some with negative and others with positive effects on telomere length. Recently, data have been accumulating to support a role for DNA replication in the control of telomere length, although through a currently poorly understood mechanism. Elg1p, a replication factor C (RFC)-like protein of yeast, contributes to genome stability through a putative replication-associated function. Here, we show that Elg1p participates in negative control of telomere length and in telomeric silencing through a replication-mediated pathway. We show that the telomeric function of Elg1 is independent of recombination and completely dependent on an active telomerase. Additionally, this function depends on yKu and DNA polymerase. We discuss alternative models to explain how Elg1p affects telomere length.
authors.affiliation: Department of Molecular Microbiology and Biotechnology, Tel Aviv University, Tel Aviv 69978, Israel. smolik@post.tau.ac.il
authors.forename: Sarit
authors.initials: S
authors.lastname: Smolikov
authors.forename: Yuval
authors.initials: Y
authors.lastname: Mazor
authors.forename: Anat
authors.initials: A
authors.lastname: Krauskopf
mesh_terms: D001483:Base Sequence; D002352:Carrier Proteins / Q000235:genetics / Q000502:physiology*; D017931:DNA Primers; D020868:Gene Silencing; D029701:Saccharomyces cerevisiae Proteins; D016615:Telomere
chemical_list: D002352:Carrier Proteins; D017931:DNA Primers; C477609:Elg1 protein, S cerevisiae; D029701:Saccharomyces cerevisiae Proteins