2024-03-28T20:15:46Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/2107882020-12-13T08:43:19Zcom_10261_89com_10261_3com_10261_44com_10261_4col_10261_342col_10261_297
Delgado, Soledad
Moreno, Miguel
Vázquez, Luis
Martín-Gago, José A.
Briones, Carlos
2020-05-08T07:20:46Z
2020-05-08T07:20:46Z
2019
IEEE Access 7: 160304- 160323 (2019)
http://hdl.handle.net/10261/210788
10.1109/ACCESS.2019.2950984
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100011033
http://dx.doi.org/10.13039/100012818
[EN] Advanced microscopy techniques currently allow scientists to visualize biomolecules at high resolution. Among them, atomic force microscopy (AFM) shows the advantage of imaging molecules in their native state, without requiring any staining or coating of the sample. Biopolymers, including proteins and structured nucleic acids, are flexible molecules that can fold into alternative conformations for any given monomer sequence, as exemplified by the different three-dimensional structures adopted by RNA in solution. Therefore, the manual analysis of images visualized by AFM and other microscopy techniques becomes very laborious and time-consuming (and may also be inadvertently biased) when large populations of biomolecules are studied. Here we present a novel morphology clustering software, based on particle isolation and artificial neural networks, which allows the automatic image analysis and classification of biomolecules that can show alternative conformations. It has been tested with a set of AFM images of RNA molecules (a 574 nucleotides-long functinal region of the hepatitis C virus genome that contains its internal ribosome entry site element) structured in folding buffers containing 0, 2, 4, 6 or 10 mM Mg. The developed software shows a broad applicability in the microscopy-based analysis of biopolymers and other complex biomolecules.
This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see http://creativecommons.org/licenses/by/4.0/
openAccess
Artificial neural networks
Atomic force microscopy
Biomolecules
Growing cell structures (GCS)
Hepatitis C virus (HCV)
Image analysis
Internal ribosome entry site (IRES)
Ribonucleic acid (RNA)
Self-organizing maps (SOM)
Morphology Clustering Software for AFM Images, Based on Particle Isolation and Artificial Neural Networks
artículo