An ancestral nuclear protein assembly: crystal structure of the Methanopyrus kandleri histone.
Fahrner, R.L., Cascio, D., Lake, J.A., Slesarev, A.(2001) Protein Sci 10: 2002-2007
- PubMed: 11567091 
- DOI: 10.1110/ps.10901
- Primary Citation of Related Structures:  
1F1E - PubMed Abstract: 
Eukaryotic histone proteins condense DNA into compact structures called nucleosomes. Nucleosomes were viewed as a distinguishing feature of eukaryotes prior to identification of histone orthologs in methanogens. Although evolutionarily distinct from methanogens, the methane-producing hyperthermophile Methanopyrus kandleri produces a novel, 154-residue histone (HMk) ...