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NMR processing:
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PINE
Side-chains:
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NOEs:
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UNIO Candid
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Ab initio:
GeNMR
Cyana
XPLOR-NIH
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Fragment-based:
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GeNMR
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Refinement:
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Structure from chemical shifts:
Fragment-based:
WeNMR CS-Rosetta
BMRB CS-Rosetta
Homology-based:
CS23D
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Torsion angles from chemical shifts:
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Secondary structure from chemical shifts:
CSI (via RCI server)
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MICS caps, β-turns
d2D
PECAN
Flexibility from chemical shifts:
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Interactions from chemical shifts:
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Chemical shifts re-referencing:
Shiftcor
UNIO Shiftinspector
LACS
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RefDB
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RDCs:
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Methyl S2
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Molecular dynamics:
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From structure:
Shiftx2
Sparta+
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ArShift- Aromatic
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Proshift
PPM
CheShift-2- Cα
From sequence:
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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:
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Default Structural Analysis of N- and O-glycans Using ZIC-HILIC/DIALYSIS Coupled to NMR Detection.

Structural Analysis of N- and O-glycans Using ZIC-HILIC/DIALYSIS Coupled to NMR Detection.

Related Articles Structural Analysis of N- and O-glycans Using ZIC-HILIC/DIALYSIS Coupled to NMR Detection.

Fungal Genet Biol. 2014 Aug 9;

Authors: Qu Y, Feng J, Deng S, Cao L, Zhang Q, Zhao R, Zhang Z, Jiang Y, Zink EM, Baker SE, Lipton MS, Paša-Toli? L, Hu JZ, Wu S

Abstract
Protein glycosylation, an important and complex post-translational modification (PTM), is involved in various biological processes, including the receptor-ligand and cell-cell interaction, and plays a crucial role in many biological functions. However, little is known about the glycan structures of important biological complex samples, and the conventional glycan enrichment strategy (i.e., size-exclusion column [SEC] separation) prior to nuclear magnetic resonance (NMR) detection is time-consuming and tedious. In this study, we developed a glycan enrichment strategy that couples Zwitterionic hydrophilic interaction liquid chromatography (ZIC-HILIC) with dialysis strategies to enrich the glycans from the pronase E digests of RNase B, followed by NMR analysis of the glycoconjugate. Our results suggest that the ZIC-HILIC enrichment coupled with dialysis is a simple, fast, and efficient sample preparation approach. The approach was thus applied to the analysis of a biological complex sample, the pronase E digest of the secreted proteins from the fungus Aspergillus niger. The NMR spectra revealed that the secreted proteins from A. niger contain both N-linked glycans with a high-mannose core similar to the structure of the glycan from RNase B, and O-linked glycans bearing mannose and glucose with 1->3 and 1->6 linkages. In all, our study provides compelling evidence that ZIC-HILIC separation coupled with dialysis is very effective and accessible in preparing glycans for the downstream NMR analysis, which could greatly facilitate the future NMR-based glycoproteomics research.


PMID: 25117693 [PubMed - as supplied by publisher]



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