BioNMR
NMR aggregator & online community since 2003
BioNMR    
Learn or help to learn NMR - get free NMR books!
 

Go Back   BioNMR > Educational resources > Journal club
Advanced Search
Home Forums Wiki NMR feeds Downloads Register Today's Posts



Jobs Groups Conferences Literature Pulse sequences Software forums Programs Sample preps Web resources BioNMR issues


Webservers
NMR processing:
MDD
NMR assignment:
Backbone:
Autoassign
MARS
UNIO Match
PINE
Side-chains:
UNIO ATNOS-Ascan
NOEs:
UNIO ATNOS-Candid
UNIO Candid
ASDP
Structure from NMR restraints:
Ab initio:
GeNMR
Cyana
XPLOR-NIH
ASDP
UNIO ATNOS-Candid
UNIO Candid
Fragment-based:
BMRB CS-Rosetta
Rosetta-NMR (Robetta)
Template-based:
GeNMR
I-TASSER
Refinement:
Amber
Structure from chemical shifts:
Fragment-based:
WeNMR CS-Rosetta
BMRB CS-Rosetta
Homology-based:
CS23D
Simshift
Torsion angles from chemical shifts:
Preditor
TALOS
Promega- Proline
Secondary structure from chemical shifts:
CSI (via RCI server)
TALOS
MICS caps, β-turns
d2D
PECAN
Flexibility from chemical shifts:
RCI
Interactions from chemical shifts:
HADDOCK
Chemical shifts re-referencing:
Shiftcor
UNIO Shiftinspector
LACS
CheckShift
RefDB
NMR model quality:
NOEs, other restraints:
PROSESS
PSVS
RPF scores
iCing
Chemical shifts:
PROSESS
CheShift2
Vasco
iCing
RDCs:
DC
Anisofit
Pseudocontact shifts:
Anisofit
Protein geomtery:
Resolution-by-Proxy
PROSESS
What-If
iCing
PSVS
MolProbity
SAVES2 or SAVES4
Vadar
Prosa
ProQ
MetaMQAPII
PSQS
Eval123D
STAN
Ramachandran Plot
Rampage
ERRAT
Verify_3D
Harmony
Quality Control Check
NMR spectrum prediction:
FANDAS
MestReS
V-NMR
Flexibility from structure:
Backbone S2
Methyl S2
B-factor
Molecular dynamics:
Gromacs
Amber
Antechamber
Chemical shifts prediction:
From structure:
Shiftx2
Sparta+
Camshift
CH3shift- Methyl
ArShift- Aromatic
ShiftS
Proshift
PPM
CheShift-2- Cα
From sequence:
Shifty
Camcoil
Poulsen_rc_CS
Disordered proteins:
MAXOCC
Format conversion & validation:
CCPN
From NMR-STAR 3.1
Validate NMR-STAR 3.1
NMR sample preparation:
Protein disorder:
DisMeta
Protein solubility:
camLILA
ccSOL
Camfold
camGroEL
Zyggregator
Isotope labeling:
UPLABEL
Solid-state NMR:
sedNMR


Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
  #1  
Old 09-13-2011, 08:27 PM
nmrlearner's Avatar
Senior Member
 
Join Date: Jan 2005
Posts: 23,700
Points: 193,617, Level: 100
Points: 193,617, Level: 100 Points: 193,617, Level: 100 Points: 193,617, Level: 100
Level up: 0%, 0 Points needed
Level up: 0% Level up: 0% Level up: 0%
Activity: 50.7%
Activity: 50.7% Activity: 50.7% Activity: 50.7%
Last Achievements
Award-Showcase
NMR Credits: 0
NMR Points: 193,617
Downloads: 0
Uploads: 0
Default The interaction of cannabinoid receptor agonists, CP55940 and WIN55212-2 with membranes using solid state 2H NMR.

The interaction of cannabinoid receptor agonists, CP55940 and WIN55212-2 with membranes using solid state 2H NMR.

The interaction of cannabinoid receptor agonists, CP55940 and WIN55212-2 with membranes using solid state 2H NMR.

Biochim Biophys Acta. 2011 Sep;1808(9):2095-101

Authors: Tian X, Pavlopoulos S, Yang DP, Makriyannis A

Abstract
Two key commonly used cannabinergic agonists, CP55940 and WIN55212-2, are investigated for their effects on the lipid membrane bilayer using (2)H solid state NMR, and the results are compared with our earlier work with delta-9-tetrahydrocannabinol (?(9)-THC). To study the effects of these ligands we used hydrated bilayers of dipalmitoylphosphatidylcholine (DPPC) deuterated at the 2' and 16' positions of both acyl chains with deuterium atoms serving as probes for the dynamic and phase changes at the membrane interface and at the bilayer center respectively. All three cannabinergic ligands lower the phospholipid membrane phase transition temperature, increase the lipid sn-2 chain order parameter at the membrane interface and decrease the order at the center of the bilayer. Our studies show that the cannabinoid ligands induce lateral phase separation in the lipid membrane at physiological temperatures. During the lipid membrane phase transition, the cooperative dynamic process whereby the C-(2)H segments at the interface and center of the bilayer spontaneously reach the fast exchange regime ((2)H NMR timescale) is distinctively modulated by the two cannabinoids. Specifically, CP55940 is slightly more efficient at inducing liquid crystalline-type (2)H NMR spectral features at the membrane interface compared to WIN55212-2. In contrast, WIN55212-2 has a far superior ability to induce liquid crystalline-type spectral features at the center of the bilayer, and it increases the order parameter of the sn-1 chain in addition to the sn-2 chain of the lipids. These observations suggest the cannabinoid ligands may influence lipid membrane domain formations and there may be contributions to their cannabinergic activities through lipid membrane microdomain related mechanisms. Our work demonstrates that experimental design strategies utilizing specifically deuterium labeled lipids yield more detailed insights concerning the properties of lipid bilayers.


PMID: 21129361 [PubMed - indexed for MEDLINE]



Source: PubMed
Reply With Quote


Did you find this post helpful? Yes | No

Reply
Similar Threads
Thread Thread Starter Forum Replies Last Post
Solid-State (19)F-NMR of Peptides in Native Membranes.
Solid-State (19)F-NMR of Peptides in Native Membranes. Solid-State (19)F-NMR of Peptides in Native Membranes. Top Curr Chem. 2011 May 20; Authors: Koch K, Afonin S, Ieronimo M, Berditsch M, Ulrich AS To understand how membrane-active peptides (MAPs) function in vivo, it is essential to obtain structural information about them in their membrane-bound state. Most biophysical approaches rely on the use of bilayers prepared from synthetic phospholipids, i.e. artificial model membranes. A particularly successful structural method is solid-state NMR,...
nmrlearner Journal club 0 05-21-2011 07:51 PM
Irregular structure of the HIV fusion peptide in membranes demonstrated by solid-state NMR and MD simulations.
Irregular structure of the HIV fusion peptide in membranes demonstrated by solid-state NMR and MD simulations. Irregular structure of the HIV fusion peptide in membranes demonstrated by solid-state NMR and MD simulations. Eur Biophys J. 2011 Jan 28; Authors: Grasnick D, Sternberg U, Strandberg E, Wadhwani P, Ulrich AS To better understand peptide-induced membrane fusion at a molecular level, we set out to determine the structure of the fusogenic peptide FP23 from the HIV-1 protein gp41 when bound to a lipid bilayer. An established solid-state...
nmrlearner Journal club 0 01-29-2011 12:35 PM
[NMR paper] The conformation of the cytoplasmic helix 8 of the CB1 cannabinoid receptor using NMR
The conformation of the cytoplasmic helix 8 of the CB1 cannabinoid receptor using NMR and circular dichroism. Related Articles The conformation of the cytoplasmic helix 8 of the CB1 cannabinoid receptor using NMR and circular dichroism. Biochim Biophys Acta. 2005 Feb 1;1668(1):1-9 Authors: Choi G, Guo J, Makriyannis A The cytoplasmic helix domain (fourth cytoplasmic loop, helix 8) of numerous GPCRs such as rhodopsin and the beta-adrenergic receptor exhibits unique structural and functional characteristics. Computational models also predict the...
nmrlearner Journal club 0 11-24-2010 11:14 PM
[NMR paper] Interaction of the fusogenic peptide B18 in its amyloid-state with lipid membranes st
Interaction of the fusogenic peptide B18 in its amyloid-state with lipid membranes studied by solid state NMR. Related Articles Interaction of the fusogenic peptide B18 in its amyloid-state with lipid membranes studied by solid state NMR. Chem Phys Lipids. 2004 Nov;132(1):65-77 Authors: Grage SL, Afonin S, Grüne M, Ulrich AS The interaction of the fusogenic polypeptide segment "B18" from the fertilization protein binding with lipid membranes was investigated by solid state 2H and 31P NMR, and by differential scanning calorimetry. B18 is known...
nmrlearner Journal club 0 11-24-2010 10:03 PM
[NMR paper] The cytoplasmic helix of cannabinoid receptor CB2, a conformational study by circular
The cytoplasmic helix of cannabinoid receptor CB2, a conformational study by circular dichroism and (1)H NMR spectroscopy in aqueous and membrane-like environments. Related Articles The cytoplasmic helix of cannabinoid receptor CB2, a conformational study by circular dichroism and (1)H NMR spectroscopy in aqueous and membrane-like environments. J Pept Res. 2002 Sep;60(3):169-77 Authors: Choi G, Landin J, Xie XQ The cytoplasmic helix domain (fourth cytoplasmic loop, helix 8) of numerous G protein-coupled receptors (GPCRs) such as rhodopsin and...
nmrlearner Journal club 0 11-24-2010 08:58 PM
[NMR paper] Exploring the calcium-binding site in photosystem II membranes by solid-state (113)Cd
Exploring the calcium-binding site in photosystem II membranes by solid-state (113)Cd NMR. Related Articles Exploring the calcium-binding site in photosystem II membranes by solid-state (113)Cd NMR. Biochemistry. 2000 Jun 13;39(23):6751-5 Authors: Matysik J, Alia A, Nachtegaal G, van Gorkom HJ, Hoff AJ, de Groot HJ Calcium (Ca(2+)) is an essential cofactor for photosynthetic oxygen evolution. Although the involvement of Ca(2+) at the oxidizing side of photosystem II of plants has been known for a long time, its ligand interactions and mode of...
nmrlearner Journal club 0 11-18-2010 09:15 PM
[NMR paper] Solid-state NMR studies of magnetically aligned phospholipid membranes: taming lantha
Solid-state NMR studies of magnetically aligned phospholipid membranes: taming lanthanides for membrane protein studies. Related Articles Solid-state NMR studies of magnetically aligned phospholipid membranes: taming lanthanides for membrane protein studies. Biochem Cell Biol. 1998;76(2-3):443-51 Authors: Prosser RS, Volkov VB, Shiyanovskaya IV The addition of lanthanides (Tm3+, Yb3+, Er3+, or Eu3+) to a solution of long-chain phospholipids such as dimyristoylphosphatidylcholine (DMPC) and short-chain phospholipids such as...
nmrlearner Journal club 0 11-17-2010 11:06 PM
[NMR paper] Interaction of a type II myosin with biological membranes studied by 2H solid state N
Interaction of a type II myosin with biological membranes studied by 2H solid state NMR. Related Articles Interaction of a type II myosin with biological membranes studied by 2H solid state NMR. Biochemistry. 1998 Apr 21;37(16):5582-8 Authors: Arêas JA, Gröbner G, Glaubitz C, Watts A Deuterium nuclear magnetic resonance spectroscopy (2H NMR) has been employed to investigate the interaction of lung type II myosin protein with neutral bilayers containing dimyristoylphosphatidylcholine (DMPC) as the only constituent and mixed bilayers containing...
nmrlearner Journal club 0 11-17-2010 11:06 PM



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



BioNMR advertisements to pay for website hosting and domain registration. Nobody does it for us.



Powered by vBulletin® Version 3.7.3
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright, BioNMR.com, 2003-2013
Search Engine Friendly URLs by vBSEO 3.6.0

All times are GMT. The time now is 08:26 AM.


Map