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Reference: Biswas SB and Biswas EE (1990) ARS binding factor I of the yeast Saccharomyces cerevisiae binds to sequences in telomeric and nontelomeric autonomously replicating sequences. Mol Cell Biol 10(2):810-5

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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.

Reference Type
Journal Article | Research Support, U.S. Gov't, P.H.S. | Comparative Study
Authors
Biswas SB, Biswas EE
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