PMID- 22435809 OWN - NLM STAT- MEDLINE DCOM- 20120711 LR - 20220321 IS - 1470-8752 (Electronic) IS - 0300-5127 (Linking) VI - 40 IP - 2 DP - 2012 Apr TI - H1 and HMGB1: modulators of chromatin structure. PG - 341-6 LID - 10.1042/BST20120014 [doi] AB - Histone H1 and HMGB1 (high-mobility group protein B1) are the most abundant chromosomal proteins apart from the core histones (on average, one copy per nucleosome and per ten nucleosomes respectively). They are both highly mobile in the cell nucleus, with high on/off rates for binding. In vivo and in vitro evidence shows that both are able to organize chromatin structure, with H1 binding resulting in a more stable structure and HMGB1 binding in a less stable structure. The binding sites for H1 and HMGB1 in chromatin are partially overlapping, and replacement of H1 by HMGB1 through the highly dynamic nature of their binding, possibly facilitated by interaction between them, could result in switching of chromatin states. Binding of HMGB1 to DNA or chromatin is regulated by its long and highly acidic tail, which is also involved in H1 binding. The present article focuses mainly on HMGB1 and its interaction with chromatin and H1, as well as its chaperone role in the binding of certain transcription factors (e.g. p53) to their cognate DNA. FAU - Thomas, Jean O AU - Thomas JO AD - Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, U.K. jot1@cam.ac.uk FAU - Stott, Katherine AU - Stott K LA - eng GR - G0401547/MRC_/Medical Research Council/United Kingdom GR - BB/D002257/1/BB_/Biotechnology and Biological Sciences Research Council/United Kingdom GR - G401547/MRC_/Medical Research Council/United Kingdom PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review PL - England TA - Biochem Soc Trans JT - Biochemical Society transactions JID - 7506897 RN - 0 (Chromatin) RN - 0 (HMGB1 Protein) RN - 0 (Histones) RN - 0 (Molecular Chaperones) SB - IM MH - Animals MH - Chromatin/*chemistry/*metabolism MH - HMGB1 Protein/chemistry/*metabolism MH - Histones/*metabolism MH - Humans MH - Molecular Chaperones/metabolism MH - Protein Binding EDAT- 2012/03/23 06:00 MHDA- 2012/07/12 06:00 CRDT- 2012/03/23 06:00 PHST- 2012/03/23 06:00 [entrez] PHST- 2012/03/23 06:00 [pubmed] PHST- 2012/07/12 06:00 [medline] AID - BST20120014 [pii] AID - 10.1042/BST20120014 [doi] PST - ppublish SO - Biochem Soc Trans. 2012 Apr;40(2):341-6. doi: 10.1042/BST20120014.