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Related Concept Videos

Intrinsically Disordered Proteins02:18

Intrinsically Disordered Proteins

Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
Next-generation Sequencing03:00

Next-generation Sequencing

The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
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Maxam-Gilbert Sequencing01:05

Maxam-Gilbert Sequencing

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The Replisome

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Phosphoinositides and PIPs01:42

Phosphoinositides and PIPs

Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
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Translesion DNA Polymerases02:10

Translesion DNA Polymerases

Translesion (TLS) polymerases rescue stalled DNA polymerases at sites of damaged bases by replacing the replicative polymerase and installing a nucleotide across the damaged site. Doing so, TLS allows additional time for the cell to repair the damage before resuming regular DNA replication.
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Optimization of Synthetic Proteins: Identification of Interpositional Dependencies Indicating Structurally and/or Functionally Linked Residues
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Speeding up sequence specific assignment of IDPs.

Wolfgang Bermel1, Ivano Bertini, Isabella C Felli

  • 1Bruker BioSpin GmbH, Silberstreifen, 76287 Rheinstetten, Germany.

Journal of Biomolecular NMR
|June 12, 2012
PubMed
Summary
This summary is machine-generated.

Nuclear Magnetic Resonance (NMR) spectroscopy of intrinsically disordered proteins (IDPs) is challenging due to spectral overlaps. New high-dimensionality NMR experiments using direct carbon-13 detection improve spectral resolution and aid in protein assignment.

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Biophysics

Background:

  • Intrinsically disordered proteins (IDPs) lack stable tertiary structures, complicating their analysis.
  • Nuclear Magnetic Resonance (NMR) spectroscopy is crucial for studying IDPs but faces challenges like spectral overlap and low resolution.
  • High-dimensionality NMR experiments are essential to overcome spectral resolution limitations in IDP characterization.

Purpose of the Study:

  • To present a suite of high-resolution, high-dimensionality NMR experiments for IDP characterization.
  • To demonstrate the utility of these experiments for the assignment of α-synuclein, a model IDP.
  • To improve spectral resolution and facilitate spin system identification and backbone resonance assignment.

Main Methods:

  • Implementation of 4D HCBCACON, HCCCON, HCBCANCO, 4/5D HNCACON and HNCANCO, and 3/4D HCANCACO experiments.
  • Utilizing direct carbon-13 detection for enhanced spectral information.
  • Application of non-uniform sampling in the indirect dimension and H-flip approach for longitudinal relaxation enhancement.

Main Results:

  • The developed NMR experiments significantly improved spectral resolution for IDP analysis.
  • Successful assignment of backbone resonances for α-synuclein was achieved using the new experimental set.
  • The combination of techniques demonstrated practical utility and efficiency.

Conclusions:

  • High-dimensionality NMR experiments, particularly those with direct carbon-13 detection, are effective for characterizing IDPs.
  • The presented experimental strategy provides a robust method for sequential backbone assignment of IDPs.
  • These advancements facilitate a deeper understanding of IDP structure-function relationships.