Neighboring residue effects in terminally blocked dipeptides

Implications for residual secondary structures in intrinsically unfolded/disordered proteins

Young Sang Jung, Kwang Im Oh, Geum Sook Hwang, Minhaeng Cho

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

For nuclear magnetic resonance (NMR)-based protein structure determinations, the random coil chemical shifts are very important because the secondary and tertiary protein structure predictions become possible by examining deviations of measured chemical shifts from those reference chemical shift values. In addition, neighboring residue effects on chemical shifts and J-coupling constants are crucial in understanding the nature of conformational propensities exhibited by unfolded or intrinsically disordered proteins. We recently reported the 1D NMR results for a complete set of terminally blocked dipeptides (Oh KI, Jung YS, Hwang GS, Cho M. J Biomol NMR 2012;53:25-41), but the NMR resonance assignments were not possible so that the average chemical shifts and J-coupling constants were only considered. In the present work, to thoroughly investigate the neighboring residue effects and random coil chemical shifts we extend the previous studies with 2D NMR, and measured all the 3JHNHα values and Hα and H N chemical shifts of the same set of terminally blocked dipeptides that are free from structural effects like secondary structure, hydrogen-bond, long-range backbone, and side-chain interactions. In particular, the preceding and following residue effects on amino-acid backbone conformational propensities are revealed and directly compared with previous works on either short peptides or empirical chemical shift database. Chirality 26:83-92, 2014.

Original languageEnglish
Pages (from-to)443-452
Number of pages10
JournalChirality
Volume26
Issue number9
DOIs
Publication statusPublished - 2014 Jan 1

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Intrinsically Disordered Proteins
Dipeptides
Chemical shift
Magnetic Resonance Spectroscopy
Proteins
Nuclear magnetic resonance
Chemical Databases
Secondary Protein Structure
Tertiary Protein Structure
Hydrogen
Chirality
Amino Acids
Peptides
Amino acids
Hydrogen bonds

ASJC Scopus subject areas

  • Catalysis
  • Spectroscopy
  • Organic Chemistry
  • Analytical Chemistry
  • Drug Discovery
  • Pharmacology

Cite this

Neighboring residue effects in terminally blocked dipeptides : Implications for residual secondary structures in intrinsically unfolded/disordered proteins. / Jung, Young Sang; Oh, Kwang Im; Hwang, Geum Sook; Cho, Minhaeng.

In: Chirality, Vol. 26, No. 9, 01.01.2014, p. 443-452.

Research output: Contribution to journalArticle

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