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In recent years, deep learning techniques have made significant strides in molecular generation for specific targets, driving advancements in drug discovery. However, existing molecular generation methods present significant limitations:…

Machine Learning · Computer Science 2025-03-12 Taojie Kuang , Qianli Ma , Athanasios V. Vasilakos , Yu Wang , Qiang , Cheng , Zhixiang Ren

We report on experimental results obtained from collisions of slow highly charged Ar9+ ions with a carbon monoxide dimer (CO)2 target. A COLTRIMS setup and a Coulomb explosion imaging approach are used to reconstruct the structure of the CO…

Atomic and Molecular Clusters · Physics 2021-04-30 A. Méry , V. Kumar , X. Fléchard , B. Gervais , S. Guillous , M. Lalande , J. Rangama , W. Wolff , A. Cassimi

We present a method for inverting charged particle velocity map images which incoorporates a non-uniform detection function. This method is applied to the specific case of extracting molecular axis alignment from Coulomb explosion imaging…

Chemical Physics · Physics 2015-07-09 Jonathan G. Underwood , I. Procino , L. Christiansen , J. Maurer , H. Stapelfeldt

Automated identification of protein conformational states from simulation of an ensemble of structures is a hard problem because it requires teaching a computer to recognize shapes. We adapt the naive Bayes classifier from the machine…

Computational Physics · Physics 2020-12-02 David M. Rogers

Single-molecule break junction measurements deliver a huge number of conductance vs.\ electrode separation traces. Along such measurements the target molecules may bind to the electrodes in different geometries, and the evolution and…

Mesoscale and Nanoscale Physics · Physics 2020-06-04 A. Magyarkuti , N. Balogh , Z. Balogh , L. Venkataraman , A. Halbritter

A protein is traditionally visualised as a piecewise linear discrete curve, and its geometry is conventionally characterised by the extrinsically determined Ramachandran angles. However, a protein backbone has also two independent intrinsic…

Biomolecules · Quantitative Biology 2017-06-07 Yanzhen Hou , Jin Dai , Nevena Ilieva , Antti J. Niemi , Xubiao Peng , Jianfeng He

The paper presents a geometrical model for protein secondary structure analysis which uses only the positions of the $C_{\alpha}$-atoms. We construct a space curve connecting these positions by piecewise polynomial interpolation and…

Biomolecules · Quantitative Biology 2014-12-30 Gerald R. Kneller , Konrad Hinsen

Understanding and extracting the patterns of microscopy images has been a major challenge in the biomedical field. Although trained scientists can locate the proteins of interest within a human cell, this procedure is not efficient and…

Computer Vision and Pattern Recognition · Computer Science 2020-06-09 Hanke Chen

There have been several studies suggesting that protein structures solved by NMR spectroscopy and x-ray crystallography show significant differences. To understand the origin of these differences, we assembled a database of high-quality…

Biomolecules · Quantitative Biology 2020-08-06 Zhe Mei , John D. Treado , Alex T. Grigas , Zachary A. Levine , Lynne Regan , Corey S. O'Hern

The protein backbone is described as a smooth curved and twisted line in three-dimensional (3D) space and characterized by its curvature $\kappa(s)$ and torsion $\tau(s)$ both expressed as a function of arc length s. It is shown that the…

Biomolecules · Quantitative Biology 2008-11-24 Sushilee Ranganathan , Dmitry Izotov , Elfi Kraka , Dieter Cremer

Understanding of the evolutionary origins of protein structures represents a key component of the understanding of molecular evolution as a whole. Here we seek to elucidate how the features of an underlying protein structural "space" might…

Soft Condensed Matter · Physics 2009-11-10 Eric J. Deeds , Nikolay V. Dokholyan , Eugene I. Shakhnovich

We present TerraBind, a foundation model for protein-ligand structure and binding affinity prediction that achieves 26-fold faster inference than state-of-the-art methods while improving affinity prediction accuracy by $\sim$20\%. Current…

The cornerstone of computational drug design is the calculation of binding affinity between two biological counterparts, especially a chemical compound, i.e., a ligand, and a protein. Predicting the strength of protein-ligand binding with…

Biomolecules · Quantitative Biology 2019-12-04 Yanjun Li , Mohammad A. Rezaei , Chenglong Li , Xiaolin Li , Dapeng Wu

We have studied nuclear fusion reactions from the Coulomb explosion of deuterium clusters induced by high-intensity laser beams within a transport approach. By incorporating the D+D $\rightarrow$ n + He$^3$ channel as inelastic collisions…

Nuclear Theory · Physics 2022-09-20 Zhe Zhu , Jun Xu , Guo-Qiang Zhang

We introduce a novel method for identifying the mass composition of ultra-high-energy cosmic rays using deep learning. The key idea of the method is to use a chain of two neural networks. The first network predicts the type of a primary…

Instrumentation and Methods for Astrophysics · Physics 2022-05-18 O. Kalashev , I. Kharuk , M. Kuznetsov , G. Rubtsov , T. Sako , Y. Tsunesada , Ya. Zhezher

Due to the advancements in technology number of entries in the structural database of proteins are increasing day by day. Methods for retrieving protein tertiary structures from this large database is the key to comparative analysis of…

Computer Vision and Pattern Recognition · Computer Science 2014-09-03 Rezaul Karim , Mohd. Momin Al Aziz , Swakkhar Shatabda , M. Sohel Rahman , Md. Abul Kashem Mia , Farhana Zaman , Salman Rakin

The study of protein mass transport via atomistic simulation requires time and length scales beyond the computational capabilities of modern computer systems. The raspberry model for colloidal particles in combination with the mesoscopic…

Soft Condensed Matter · Physics 2017-04-28 Vincent Ustach , Roland Faller

By using a mixture model for the density distribution of the three pseudobond angles formed by $C_\alpha$ atoms of four consecutive residues, the local structural states are discretized as 17 conformational letters of a protein structural…

Biomolecules · Quantitative Biology 2007-05-23 Wei-Mou Zheng , Xin Liu

While many good textbooks are available on Protein Structure, Molecular Simulations, Thermodynamics and Bioinformatics methods in general, there is no good introductory level book for the field of Structural Bioinformatics. This book aims…

We propose a novel approach to detect the binding between proteins making use of the anomalous diffraction of natively present heavy elements inside the molecule 3D structure. In particular, we suggest considering sulfur atoms contained in…