Abstract

The structure and dynamics of cell membranes have long been of interest. However, the insolubility of lipids in water has precluded biologically relevant studies of bilayers using liquid-state NMR and crystallographic techniques. Solid state deuterium NMR is sensitive to motions on the order of 101 - 1010 sec-1 and thus is ideal for studying molecular dynamics. In this study we have observed sidechain-deuterated N-Palmitoylgalactosylsphingo-sine (NPGS) bilayers using standard quadrupole echo and inversion recovery experiments. From these spectra detailed motional mechanisms and rates can be extracted through the use of computer simulations. In particular, rates of long axis diffusion and trans-gauche isomerization can be measured in the La phase1; determining rates at several temperatures will allow the measurement of activation energies for these motions.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
5P41RR000995-21
Application #
5221935
Study Section
Project Start
Project End
Budget Start
Budget End
Support Year
21
Fiscal Year
1996
Total Cost
Indirect Cost

  Publications

Marintchev, Assen; Edmonds, Katherine A; Marintcheva, Boriana et al. (2009) Topology and regulation of the human eIF4A/4G/4H helicase complex in translation initiation. Cell 136:447-60
Frueh, Dominique P; Arthanari, Haribabu; Koglin, Alexander et al. (2009) A double TROSY hNCAnH experiment for efficient assignment of large and challenging proteins. J Am Chem Soc 131:12880-1
Frueh, Dominique P; Leed, Alison; Arthanari, Haribabu et al. (2009) Time-shared HSQC-NOESY for accurate distance constraints measured at high-field in (15)N-(13)C-ILV methyl labeled proteins. J Biomol NMR 45:311-8
Lentz, Margaret R; Westmoreland, Susan V; Lee, Vallent et al. (2008) Metabolic markers of neuronal injury correlate with SIV CNS disease severity and inoculum in the macaque model of neuroAIDS. Magn Reson Med 59:475-84
Hyberts, Sven G; Heffron, Gregory J; Tarragona, Nestor G et al. (2007) Ultrahigh-resolution (1)H-(13)C HSQC spectra of metabolite mixtures using nonlinear sampling and forward maximum entropy reconstruction. J Am Chem Soc 129:5108-16
Chen, Jingyang; Dupradeau, Francois-Yves; Case, David A et al. (2007) Nuclear magnetic resonance structural studies and molecular modeling of duplex DNA containing normal and 4'-oxidized abasic sites. Biochemistry 46:3096-107
Lentz, Margaret R; Kim, John P; Westmoreland, Susan V et al. (2005) Quantitative neuropathologic correlates of changes in ratio of N-acetylaspartate to creatine in macaque brain. Radiology 235:461-8
Kim, John P; Lentz, Margaret R; Westmoreland, Susan V et al. (2005) Relationships between astrogliosis and 1H MR spectroscopic measures of brain choline/creatine and myo-inositol/creatine in a primate model. AJNR Am J Neuroradiol 26:752-9
Peled, S; Cory, D G; Raymond, S A et al. (1999) Water diffusion, T(2), and compartmentation in frog sciatic nerve. Magn Reson Med 42:911-8
Mo, H; Dai, Y; Pochapsky, S S et al. (1999) 1H, 13C and 15N NMR assignments for a carbon monoxide generating metalloenzyme from Klebsiella pneumoniae. J Biomol NMR 14:287-8

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