DENSS has been updated to v1.7.3 with bug fixes and features, including improvements in speed and robustness. DENSS has also been updated to be compatible with and integrated into BioXTAS RAW. Features and Bug fixes: … [Read more...]
New DENSS Tools in BioXTAS Raw
The latest release of BioXTAS RAW v2.3.0, a popular software package for analyzing SAXS data, now includes two new tools from DENSS, DIFT and PDB2SAS. The first tool, DIFT (DENSS IFT), uses an indirect Fourier transform (IFT) to calculate a P(r) curve from a scattering profile. DIFT is the same algorithm used by the denss.fit_data.py command line script. This algorithm has been published in Journal of Applied Crystallography (https://journals.iucr.org/j/issues/2022/05/00/vg5144/). DIFT allows … [Read more...]
New SWAXS calculator for atomic models
DENSS v1.7.0 introduces a new tool for calculating highly accurate SWAXS profiles from atomic models and fitting experimental data (like CRYSOL, FoXS and others). The denss.pdb2mrc.py script will accept atomic models in the PDB format and generate a high-resolution electron density map incorporating solvent terms such as excluded volume and the hydration shell. The article describing the method has been published on Biophysical Journal … [Read more...]
DENSS v1.7.0 released
We are excited to announce the release of DENSS v1.7.0. Included in the updates are many bug fixes, speed and stability improvements. A few new scripts have been added and updated, significant ones including denss.pdb2mrc.py and denss.mrc2sas.py. denss.pdb2mrc.py has been completely rewritten using a new algorithm to calculate electron density maps from atomic models that accurately fit experimental SWAXS data (more details in a follow up post and in our bioRxiv paper). The new script … [Read more...]
New chapter describing DENSS
A new chapter describing DENSS is out today in Methods in Enzymology. Written by DENSS creator Tom Grant, the chapter titled "Reconstruction of 3D density from solution scattering" describes in detail the DENSS algorithm, how to use the software and evaluate results, and how DENSS is unique among solution scattering modeling algorithms. The chapter includes several new figures, plots and examples with simulated and experimental data, with a particular focus on explaining how to use the software … [Read more...]
New DENSS paper for fitting SAS data
A new paper out in Journal of Applied Crystallography describes a method for fitting small angle scattering profiles with a smooth function as implemented in the denss.fit_data.py script in DENSS. The open access article, titled "Describing small angle scattering profiles by a limited set of intensities", describes in detail our approach to using an indirect Fourier transform (IFT) based on a trigonometric series (using Shannon information theory) to reduce a scattering profile to a discrete set … [Read more...]