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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...
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...
Protein Organization01:24

Protein Organization

Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence.
Newman Projections02:06

Newman Projections

Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used representations is the dash-wedge formula. The dashed wedges, solid wedges, and the plane lines indicate the groups situated behind the plane, coming out of the plane, and in the plane, respectively.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as conformers.

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Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web
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On the interrelationship between atomic displacement parameters (ADPs) and coordinates in protein structures.

Manfred S Weiss1

  • 1EMBL Hamburg Outstation, c/o DESY, Notkestrasse 85, D-22603 Hamburg, Germany.

Acta Crystallographica. Section D, Biological Crystallography
|December 18, 2007
PubMed
Summary

Atomic coordinates can predict up to 50% of atomic displacement parameter (ADP) variation in macromolecular structures. This finding impacts structure refinement and validation, especially at low resolution.

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Area of Science:

  • Structural biology
  • X-ray crystallography
  • Computational biology

Background:

  • Macromolecular models are refined using atomic coordinates and atomic displacement parameters (ADPs).
  • The relationship between atomic coordinates and ADPs has been historically underutilized in structure refinement.
  • Previous attempts to link these parameters have not been widely adopted.

Purpose of the Study:

  • To investigate the predictive power of atomic coordinates on ADP variations.
  • To explore the potential of a simplified parameter set for macromolecular structure refinement.
  • To assess the implications for low-resolution structure refinement and validation.

Main Methods:

  • Developing a predictive model based on atomic coordinates.
  • Utilizing a small set of global parameters (three per structure).
  • Testing the model's performance on macromolecular structures.

Main Results:

  • Successfully predicted up to 50% of total ADP variation using only atomic coordinates.
  • Demonstrated a strong correlation between coordinate data and ADP variability.
  • Identified a significant relationship previously overlooked in refinement protocols.

Conclusions:

  • Atomic coordinates contain substantial information about ADP variations.
  • The findings suggest a novel approach to macromolecular structure refinement.
  • This method could improve accuracy and efficiency, particularly for low-resolution data and structure validation.