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



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  
Unread 11-28-2014, 11:37 AM
nmrlearner's Avatar
Senior Member
 
Join Date: Jan 2005
Posts: 23,135
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 Paramagnetic relaxation enhancement of membrane proteins by incorporation of the metal-chelating unnatural amino acid 2-amino-3-(8-hydroxyquinolin-3-yl)propanoic acid (HQA)

Paramagnetic relaxation enhancement of membrane proteins by incorporation of the metal-chelating unnatural amino acid 2-amino-3-(8-hydroxyquinolin-3-yl)propanoic acid (HQA)

Abstract

The use of paramagnetic constraints in protein NMR is an active area of research because of the benefits of long-range distance measurements (>10Â*Ã?). One of the main issues in successful execution is the incorporation of a paramagnetic metal ion into diamagnetic proteins. The most common metal ion tags are relatively long aliphatic chains attached to the side chain of a selected cysteine residue with a chelating group at the end where it can undergo substantial internal motions, decreasing the accuracy of the method. An attractive alternative approach is to incorporate an unnatural amino acid that binds metal ions at a specific site on the protein using the methods of molecular biology. Here we describe the successful incorporation of the unnatural amino acid 2-amino-3-(8-hydroxyquinolin-3-yl)propanoic acid (HQA) into two different membrane proteins by heterologous expression in E. coli. Fluorescence and NMR experiments demonstrate complete replacement of the natural amino acid with HQA and stable metal chelation by the mutated proteins. Evidence of site-specific intra- and inter-molecular PREs by NMR in micelle solutions sets the stage for the use of HQA incorporation in solid-state NMR structure determinations of membrane proteins in phospholipid bilayers.



Source: Journal of Biomolecular NMR
Reply With Quote


Did you find this post helpful? Yes | No

Reply
Similar Threads
Thread Thread Starter Forum Replies Last Post
Movements of proteins can be predicted from their amino acid sequence - HealthCanal.com
Movements of proteins can be predicted from their amino acid sequence - HealthCanal.com <img alt="" height="1" width="1" /> Movements of proteins can be predicted from their amino acid sequence HealthCanal.com Researchers of the VIB department of Structural Biology, in a collaboration within the 'Interuniversity Institute of Bioinformatics in Brussels (IB2)', have developed a method to predict how much the backbone chain of a protein moves based on only its ... Read here
nmrlearner Online News 0 11-26-2013 01:19 AM
[NMR paper] High-resolution NMR reveals secondary structure and folding of amino Acid transporter from outer chloroplast membrane.
High-resolution NMR reveals secondary structure and folding of amino Acid transporter from outer chloroplast membrane. Related Articles High-resolution NMR reveals secondary structure and folding of amino Acid transporter from outer chloroplast membrane. PLoS One. 2013;8(10):e78116 Authors: Zook JD, Molugu TR, Jacobsen NE, Lin G, Soll J, Cherry BR, Brown MF, Fromme P Abstract Solving high-resolution structures for membrane proteins continues to be a daunting challenge in the structural biology community. In this study we report our...
nmrlearner Journal club 0 11-11-2013 01:30 AM
An efficient protocol for incorporation of an unnatural amino acid in perdeuterated recombinant proteins using glucose-based media
An efficient protocol for incorporation of an unnatural amino acid in perdeuterated recombinant proteins using glucose-based media Abstract The in vivo incorporation of unnatural amino acids into proteins is a well-established technique requiring an orthogonal tRNA/aminoacyl-tRNA synthetase pair specific for the unnatural amino acid that is incorporated at a position encoded by a TAG amber codon. Although this technology provides unique opportunities to engineer protein structures, poor protein yields are usually obtained in deuterated media, hampering its application in the protein NMR...
nmrlearner Journal club 0 02-21-2012 03:40 AM
Elucidating metabolic pathways for amino acid incorporation into dragline spider silk using 13C enrichment and solid state NMR.
Elucidating metabolic pathways for amino acid incorporation into dragline spider silk using 13C enrichment and solid state NMR. Elucidating metabolic pathways for amino acid incorporation into dragline spider silk using 13C enrichment and solid state NMR. Comp Biochem Physiol A Mol Integr Physiol. 2011 Jul;159(3):219-24 Authors: Creager MS, Izdebski T, Brooks AE, Lewis RV Abstract Spider silk has been evolutionarily optimized for contextual mechanical performance over the last 400 Ma. Despite precisely balanced mechanical properties,...
nmrlearner Journal club 0 09-02-2011 05:40 PM
Analysis of the amide 15N chemical shift tensor of the Cα tetrasubstituted constituent of membrane-active peptaibols, the α-aminoisobutyric acid residue, compared to those of di- and tri-substituted proteinogenic amino acid residues
Analysis of the amide 15N chemical shift tensor of the Cα tetrasubstituted constituent of membrane-active peptaibols, the α-aminoisobutyric acid residue, compared to those of di- and tri-substituted proteinogenic amino acid residues <div class="Abstract">Abstract In protein NMR spectroscopy the chemical shift provides important information for the assignment of residues and a first structural evaluation of dihedral angles. Furthermore, angular restraints are obtained from oriented samples by solution and solid-state NMR spectroscopic approaches. Whereas the anisotropy of chemical...
nmrlearner Journal club 0 01-09-2011 12:46 PM
Optimization of amino acid type-specific (13)C and (15)N labeling for the backbone assignment of membrane proteins by solution- and solid-state NMR with the UPLABEL algorithm.
Optimization of amino acid type-specific (13)C and (15)N labeling for the backbone assignment of membrane proteins by solution- and solid-state NMR with the UPLABEL algorithm. Optimization of amino acid type-specific (13)C and (15)N labeling for the backbone assignment of membrane proteins by solution- and solid-state NMR with the UPLABEL algorithm. J Biomol NMR. 2010 Dec 18; Authors: Hefke F, Bagaria A, Reckel S, Ullrich SJ, Dötsch V, Glaubitz C, Güntert P We present a computational method for finding optimal labeling patterns for the backbone...
nmrlearner Journal club 0 12-21-2010 01:00 PM
Optimization of amino acid type-specific 13C and 15N labeling for the backbone assignment of membrane proteins by solution- and solid-state NMR with the UPLABEL algorithm
Optimization of amino acid type-specific 13C and 15N labeling for the backbone assignment of membrane proteins by solution- and solid-state NMR with the UPLABEL algorithm Abstract We present a computational method for finding optimal labeling patterns for the backbone assignment of membrane proteins and other large proteins that cannot be assigned by conventional strategies. Following the approach of Kainosho and Tsuji (Biochemistry 21:6273â??6279 (1982)), types of amino acids are labeled with 13C or/and 15N such that cross peaks between 13CO(i â?? 1) and 15NH(i) result only for pairs...
nmrlearner Journal club 0 12-21-2010 02:14 AM
[NMR paper] An AMBER/DYANA/MOLMOL phosphorylated amino acid library set and incorporation into NMR structure calculations.
An AMBER/DYANA/MOLMOL phosphorylated amino acid library set and incorporation into NMR structure calculations. Related Articles An AMBER/DYANA/MOLMOL phosphorylated amino acid library set and incorporation into NMR structure calculations. J Biomol NMR. 2005 Sep;33(1):15-24 Authors: Craft JW, Legge GB Protein structure determination using Nuclear Magnetic Resonance (NMR) requires the use of molecular dynamics programs that incorporate both NMR experimental and implicit atomic data. Atomic parameters for each amino acid type are encoded in...
nmrlearner Journal club 0 12-01-2010 06:56 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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 04:34 AM.


Map