Related ArticlesThe Role of Basic Amino Acids in the Molecular Recognition of Hydroxyapatite by Statherin using Solid State NMR.
Surf Sci. 2010 Aug 15;604(15-16):L39-L42
Authors: Ndao M, Ash JT, Stayton PS, Drobny GP
Organisms use proteins such as statherin to control the growth of hydroxyapatite (HAP), which is the principal component of teeth and bone. Though much emphasis has been placed on the acidic character of these proteins, the role of their basic amino acids is not well understood. In this work, solid state nuclear magnetic resonance was used to probe the interaction of the basic arginine side chains with the HAP surface. Statherin samples were individually labeled at each arginine site, and the distance to the surface was measured using the Rotational Echo DOuble Resonance (REDOR) technique. The results indicate a strong coupling between the R9 and R10 residues and the phosphorus atoms on the surface, with internuclear distances of 4.62 +/- 0.29 A and 4.53 +/- 0.16 A, respectively. Conversely, results also indicate weak coupling between R13 and the surface, suggesting this residue is more removed from the surface than R9 and R10. Combining these results with previous data, a new model for the molecular recognition of HAP by statherin is constructed.
PMID: 20676391 [PubMed - as supplied by publisher]
[Question from NMRWiki Q&A forum] 13C quaternary centers in amino acids
13C quaternary centers in amino acids
I've got a sample of about 5mg of an amino acid that is the final product of a a synthesis. Due to the long relaxation time that the carboxylic and the alpha C we only got a 200 varian Mercury instrument and we're unable to obtain those signals. I was wondering if an APT is better than DEPT, because we're only interested in this signals and i've heard the overall pulse sequence is shorter than the DEPT, increasing the number of scans in the same period of time.
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09-01-2011 07:20 AM
[Question from NMRWiki Q&A forum] 13C cuaternary centers in amino acids
13C cuaternary centers in amino acids
I've got a sample of about 5mg of an amino acid that is the final product of a a synthesis. Due to the long relaxation time that the carboxilic and the alpha C we only got a 200 varian Mercury instrument and we're unable to obtain those signals. I was wondering if an APT is better than DEPT, because we're only interested in this signals and i've heart the overall pulse sequence is shorter than the DEPT, increasing the number of scans in the same period of time
Check if somebody has answered this question on NMRWiki QA forum
nmrlearner
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08-31-2011 07:12 PM
[KPWU blog] Names of Atoms of Amino acids
Names of Atoms of Amino acids
I really hate the inconsistent nomenclature of atoms of amino acids between different programs/database. I finished all NOESY assignment on Sparky using PDB nomenclature and the Sparky XPLOR constraint plugin (shortcut xf) doesn’t take care of the differences between XPLOR and PDB. Thus I have to find a table showing me the differences of names http://stats.wordpress.com/b.gif?host=kpwu.wordpress.com&blog=76132&post=262&subd=kpwu&ref=&feed=1
Go to KPWU blog to read complete post.
nmrlearner
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01-28-2011 04:52 AM
[NMR paper] Modulation of intrinsic phi,psi propensities of amino acids by neighbouring residues
Modulation of intrinsic phi,psi propensities of amino acids by neighbouring residues in the coil regions of protein structures: NMR analysis and dissection of a beta-hairpin peptide.
Related Articles Modulation of intrinsic phi,psi propensities of amino acids by neighbouring residues in the coil regions of protein structures: NMR analysis and dissection of a beta-hairpin peptide.
J Mol Biol. 1998 Dec 18;284(5):1597-609
Authors: Griffiths-Jones SR, Sharman GJ, Maynard AJ, Searle MS
Analysis of residues in coil regions of protein structures...
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11-17-2010 11:15 PM
[NMR paper] Assigning the NMR spectra of aromatic amino acids in proteins: analysis of two Ets po
Assigning the NMR spectra of aromatic amino acids in proteins: analysis of two Ets pointed domains.
Related Articles Assigning the NMR spectra of aromatic amino acids in proteins: analysis of two Ets pointed domains.
Biochem Cell Biol. 1998;76(2-3):379-90
Authors: Slupsky CM, Gentile LN, McIntosh LP
The measurement of interproton nuclear Overhauser enhancements (NOEs) and dihedral angle restraints of aromatic amino acids is a critical step towards determining the structure of a protein. The complete assignment of the resonances from aromatic...
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11-17-2010 11:06 PM
[NMR paper] The solution conformations of amino acids from molecular dynamics simulations of Gly-
The solution conformations of amino acids from molecular dynamics simulations of Gly-X-Gly peptides: comparison with NMR parameters.
Related Articles The solution conformations of amino acids from molecular dynamics simulations of Gly-X-Gly peptides: comparison with NMR parameters.
Biochem Cell Biol. 1998;76(2-3):164-70
Authors: van der Spoel D
The conformations that amino acids can adopt in the random coil state are of fundamental interest in the context of protein folding research and studies of protein-peptide interactions. To date, no...
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11-17-2010 11:06 PM
[NMR paper] Determination of de novo synthesized amino acids in cellular proteins revisited by 13
Determination of de novo synthesized amino acids in cellular proteins revisited by 13C NMR spectroscopy.
http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--www3.interscience.wiley.com-aboutus-images-wiley_interscience_pubmed_logo_120x27.gif Related Articles Determination of de novo synthesized amino acids in cellular proteins revisited by 13C NMR spectroscopy.
NMR Biomed. 1997 Apr;10(2):50-8
Authors: Flögel U, Willker W, Leibfritz D
13C nuclear magnetic resonance spectroscopy was used to determine the absolute amounts to de novo...
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08-22-2010 03:03 PM
[NMR paper] Comparison between the phi distribution of the amino acids in the protein database an
Comparison between the phi distribution of the amino acids in the protein database and NMR data indicates that amino acids have various phi propensities in the random coil conformation.
http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--linkinghub.elsevier.com-ihub-images-PubMedLink.gif Related Articles Comparison between the phi distribution of the amino acids in the protein database and NMR data indicates that amino acids have various phi propensities in the random coil conformation.
J Mol Biol. 1995 Nov 24;254(2):322-33
Authors: Serrano L
...
The Role of Basic Amino Acids in the Molecular Recognition of Hydroxyapatite by Stath
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