Archaeal histone selection of nucleosome positioning sequences and the procaryotic origin of histone-dependent genome evolution
Identifieur interne : 003761 ( Main/Exploration ); précédent : 003760; suivant : 003762Archaeal histone selection of nucleosome positioning sequences and the procaryotic origin of histone-dependent genome evolution
Auteurs : Kathryn A. Bailey [États-Unis] ; Suzette L. Pereira [États-Unis] ; Jonathan Widom [États-Unis] ; John N. Reeve [États-Unis]Source :
- Journal of Molecular Biology [ 0022-2836 ] ; 2000.
English descriptors
- KwdEn :
- Teeft :
- Acad, Archaeal, Archaeal histone, Archaeal histones, Archaeal nucleosome, Archaeal nucleosome assembly, Archaeal nucleosomes, Biol, Complete genome sequence, Crothers, Digestion, Dinucleotide, Dinucleotides, Eucaryal, Fervidus, Gene expression, Genome, Genome sequence evolution, Genome sequences, Genomic, Histone, Kawarabayashi, Lateral gene transfer, Lowary, Lowary widom, Luger, Methanococcus jannaschii, Methanothermus, Methanothermus fervidus, Micrococcal nuclease, Molecule, Natl, Natl acad, Nucleosome, Nucleosome assembly, Nucleosome core, Nucleosomes, Pereira, Pereira reeve, Power spectra, Proc, Reaction mixtures, Reeve, Restriction fragments, Rhmfb, Sandman reeve, Sequencing, Shrader, Shrader crothers, Thastrom, Thermoautotrophicum, Widlund, Widom, Woese.
Abstract
Abstract: Archaeal histones and the eucaryal (eucaryotic) nucleosome core histones have almost identical histone folds. Here, we show that DNA molecules selectively incorporated by rHMfB (recombinant archaeal histone B from Methanothermus fervidus) into archaeal nucleosomes from a mixture of ∼1014 random sequence molecules contain sequence motifs shown previously to direct eucaryal nucleosome positioning. The dinucleotides GC, AA (=TT) and TA are repeated at ∼10 bp intervals, with the GC harmonic displaced ∼5 bp from the AA and TA harmonics [(GCN3AA or TA)n]. AT and CG were not strongly selected, indicating that TA≠AT and GC≠CG in terms of facilitating archaeal nucleosome assembly. The selected molecules have affinities for rHMfB ranging from ∼9 to 18-fold higher than the level of affinity of the starting population, and direct the positioned assembly of archaeal nucleosomes. Fourier-transform analyses have revealed that AA dinucleotides are much enriched at ∼10.1 bp intervals, the helical repeat of DNA wrapped around a nucleosome, in the genomes of Eucarya and the histone-containing Euryarchaeota, but not in the genomes of Bacteria and Crenarchaeota, procaryotes that do not have histones. Facilitating histone packaging of genomic DNA has apparently therefore imposed constraints on genome sequence evolution, and since archaeal histones have no structure in addition to the histone fold, these constraints must result predominantly from histone fold-DNA contacts. Based on the three-domain universal phylogeny, histones and histone-dependent genome sequence evolution most likely evolved after the bacterial-archaeal divergence but before the archaeal-eucaryal divergence, and were subsequently lost in the Crenarchaeota. However, with lateral gene transfer, the first histone fold could alternatively have evolved after the archaeal-eucaryal divergence, early in either the euryarchaeal or eucaryal lineages.
Url:
DOI: 10.1006/jmbi.2000.4128
Affiliations:
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<front><div type="abstract" xml:lang="en">Abstract: Archaeal histones and the eucaryal (eucaryotic) nucleosome core histones have almost identical histone folds. Here, we show that DNA molecules selectively incorporated by rHMfB (recombinant archaeal histone B from Methanothermus fervidus) into archaeal nucleosomes from a mixture of ∼1014 random sequence molecules contain sequence motifs shown previously to direct eucaryal nucleosome positioning. The dinucleotides GC, AA (=TT) and TA are repeated at ∼10 bp intervals, with the GC harmonic displaced ∼5 bp from the AA and TA harmonics [(GCN3AA or TA)n]. AT and CG were not strongly selected, indicating that TA≠AT and GC≠CG in terms of facilitating archaeal nucleosome assembly. The selected molecules have affinities for rHMfB ranging from ∼9 to 18-fold higher than the level of affinity of the starting population, and direct the positioned assembly of archaeal nucleosomes. Fourier-transform analyses have revealed that AA dinucleotides are much enriched at ∼10.1 bp intervals, the helical repeat of DNA wrapped around a nucleosome, in the genomes of Eucarya and the histone-containing Euryarchaeota, but not in the genomes of Bacteria and Crenarchaeota, procaryotes that do not have histones. Facilitating histone packaging of genomic DNA has apparently therefore imposed constraints on genome sequence evolution, and since archaeal histones have no structure in addition to the histone fold, these constraints must result predominantly from histone fold-DNA contacts. Based on the three-domain universal phylogeny, histones and histone-dependent genome sequence evolution most likely evolved after the bacterial-archaeal divergence but before the archaeal-eucaryal divergence, and were subsequently lost in the Crenarchaeota. However, with lateral gene transfer, the first histone fold could alternatively have evolved after the archaeal-eucaryal divergence, early in either the euryarchaeal or eucaryal lineages.</div>
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