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Derivatization of Protein Crystals with I3C using Random Microseed Matrix Screening

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Published on: January 16, 2021

Improving the efficiency of molecular replacement by utilizing a new iterative transform phasing algorithm.

Hongxing He¹, Hengrui Fang¹, Mitchell D Miller²

¹Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, USA.

Acta Crystallographica. Section A, Foundations and Advances

|September 1, 2016

Summary

This summary is machine-generated.

This study enhances the molecular replacement (MR) algorithm in protein crystallography using an iterative transform method. This approach improves phasing for protein structures that are difficult to solve with conventional MR techniques.

Keywords:

ab initio phasing hybrid input–output algorithm molecular replacement protein crystallography

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Area of Science:

Structural biology
Protein crystallography
Computational methods

Background:

Molecular replacement (MR) is a key technique in protein crystallography.
Conventional MR struggles with low-similarity template and target structures.
High-solvent-content protein crystals present phasing challenges.

Purpose of the Study:

To enhance the molecular replacement (MR) algorithm using an iterative transform method.
To improve the phasing of protein structures resistant to conventional MR.
To demonstrate the applicability of the modified phasing method.

Main Methods:

An iterative transform method for direct phasing was applied.
The method was employed to enhance the MR algorithm.
Trial calculations were performed on three different protein structures.

Main Results:

The iterative transform method shows potential for enhancing MR.
The methodology appears effective for structures resistant to conventional MR.
Illustrative calculations demonstrate the feasibility of the approach.

Conclusions:

The enhanced MR algorithm offers a viable solution for difficult phasing problems.
This modified phasing method expands the scope of MR in protein crystallography.
The approach provides an alternative to existing MR software like PHENIX Phaser-MR and MR-Rosetta.