Journal
JOURNAL OF BIOMOLECULAR NMR
Volume 72, Issue 3-4, Pages 139-148Publisher
SPRINGER
DOI: 10.1007/s10858-018-0213-2
Keywords
Intrinsically disordered domain; IDP; Phosphorylation; Histone; NMR assignment strategy
Categories
Funding
- Spanish MINECO - European FEDER funds [CTQ2014-52633-P]
- MCIU - European FEDER funds [CTQ2017-84371-P]
- Spanish MINECO [BES-2015-073383]
Ask authors/readers for more resources
The C-terminal domain of histone H1.0 (C-H1.0) is involved in DNA binding and is a main determinant of the chromatin condensing properties of histone H1.0. Phosphorylation at the (S/T)-P-X-(K/R) motifs affects DNA binding and is crucial for regulation of C-H1.0 function. Since C-H1.0 is an intrinsically disordered domain, solution NMR is an excellent approach to characterize the effect of phosphorylation on the structural and dynamic properties of C-H1.0. However, its very repetitive, low-amino acid-diverse and Pro-rich sequence, together with the low signal dispersion observed at the H-1-N-15 HSQC spectra of both non- and tri-phosphorylated C-H1.0 preclude the use of standard H-1-detected assignment strategies. We have achieved an essentially complete assignment of the heavy backbone atoms (N-15, C-13 and C-13), as well as H-1(N) and C-13 nuclei, of non- and tri-phosphorylated C-H1.0 by applying a novel C-13-detected CON-based strategy. No C-H1.0 region with a clear secondary structure tendency was detected by chemical shift analyses, confirming at residue level that C-H1.0 is disordered in aqueous solution. Phosphorylation only affected the chemical shifts of phosphorylated Thr's, and their adjacent residues. Heteronuclear {H-1}-N-15 NOEs were also essentially equal in the non- and tri-phosphorylated states. Hence, structural tendencies and dynamic properties of C-H1.0 free in aqueous solution are unmodified by phosphorylation. We propose that the assignment strategy used for C-H1.0, which is based on the acquisition of only a few 3D spectra, is an excellent choice for short-lived intrinsically disordered proteins with repetitive sequences.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available