ARS binding factor I of the yeast Saccharomyces cerevisiae binds to sequences in telomeric and nontelomeric autonomously replicating sequences - PubMed (original) (raw)

Comparative Study

ARS binding factor I of the yeast Saccharomyces cerevisiae binds to sequences in telomeric and nontelomeric autonomously replicating sequences

S B Biswas et al. Mol Cell Biol. 1990 Feb.

Abstract

We have analyzed various autonomously replicating sequences (ARSs) in yeast nuclear extract with ARS-specific synthetic oligonucleotides. The EI oligonucleotide sequence, which is derived from HMRE-ARS, and the F1 oligonucleotide sequence, which is derived from telomeric ARS120, appeared to bind to the same cellular factor with high specificity. In addition, each of these oligonucleotides was a competitive inhibitor of the binding of the other. Binding of the ARS binding factor (ABF) to either of these oligonucleotides was inhibited strongly by plasmids containing ARS1 and telomeric TF1-ARS. DNase I footprinting analyses with yeast nuclear extract showed that EI and F1 oligonucleotides eliminated protection of the binding site of ARS binding factor I (ABFI) in domain B of ARS1. Sequence analyses of various telomeric (ARS120 and TF1-ARS) and nontelomeric ARSs (ARS1 and HMRE-ARS) showed the presence of consensus ABFI binding sites in the protein binding domains of all of these ARSs. Consequently, the ABFI and ABFI-like factors bind to these domain B-like sequences in a wide spectrum of ARSs, both telomeric and nontelomeric.

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ARS binding factor I of the yeast Saccharomyces cerevisiae binds to sequences in telomeric and nontelomeric autonomously replicating sequences - PubMed (original) (raw)