Multiple overlapping positions of nucleosomes with single in vivo rotational setting in the Hansenula polymorpha RNA polymerase II MOX promoter.

In vivo nucleotide-level mapping of nucleosomes in the promoter of the methanol oxidase (MOX) gene in the yeast Hansenula polymorpha is reported. The 4 nucleosomes analyzed are organized in families; they localize in alternative positions along a unique rotational phase, and the linker regions can be occupied by alternative nucleosomes. This organization underscores a substantial freedom of choice by histone octamers when nucleating on a promoter region.