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Volumn 119, Issue 50, 1997, Pages 12257-12261

One-dimensional relaxation- and diffusion-edited NMR methods for screening compounds that bind to macromolecules

Author keywords

[No Author keywords available]

Indexed keywords

ANALYTIC METHOD; ARTICLE; MACROMOLECULE; MOLECULAR INTERACTION; NUCLEAR MAGNETIC RESONANCE; SCREENING;

EID: 0031576702     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja9715962     Document Type: Article
Times cited : (363)

References (35)
  • 28
    • 2642606839 scopus 로고    scopus 로고
    • note
    • Although the overall signal intensity of FKBP was reduced by greater than 99% in the relaxation-edited spectrum, a few residual peaks remained. Thus, a relaxation-edited spectrum of FKBP alone was subtracted from the relaxation-edited spectrum of the compounds in the presence of the protein.
  • 29
    • 2642681484 scopus 로고    scopus 로고
    • note
    • Narrow Lorenztian line shapes (as expected for low molecular weight compounds) can often give rise to dispersion signals in difference spectra. For the compounds tested against FKBP, Gaussian apodization of the free induction decay essentially eliminated the dispersion signals in the difference spectra, resulting in clearly identifiable resonances for the active compound. However, as a result of the line broadening caused by the apodization, the spin-spin splittings for these compounds were not observed.
  • 30
    • 2642710754 scopus 로고    scopus 로고
    • note
    • The spin-lock times and gradient strengths used in the examples presented here resulted in complete elimination of the bound ligand signals. Hence, only positive peaks appear in the final difference spectra at the chemical shifts of the uncomplexed ligand (Figures 2C and 4C). Incomplete reduction of the bound ligand signals will give rise to negative peaks in the difference spectrum at the chemical shifts of the ligand in the presence of the protein.
  • 32
    • 2642702394 scopus 로고    scopus 로고
    • note
    • Acetohydroxamic acid and 2 bind to stromelysin in a cooperative fashion, with the hydroxamate chelating the catalytic zinc and 2 occupying the S1′ subsite (see ref 6). This illustrates the fact that these relaxation-and diffusion-edited methods can be used to detect ligand binding to macromolecules even in the presence of ligands which bind to other sites.
  • 33
    • 2642677478 scopus 로고    scopus 로고
    • note
    • The low concentrations of protein used in the one-dimensional experiments significantly reduce potential chemical shift changes of the compounds which may occur in the presence of protein. This is important to minimize subtraction artifacts in the difference spectra.
  • 34
    • 2642616052 scopus 로고    scopus 로고
    • note
    • 2O was the most robust approach for removal of the water signal.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.