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Título: | Introns form Compositional Clusters in Parallel with the Compositional Clusters of the Coding Sequences to Which they Pertain |
Autor: | Fuertes, Miguel Ángel CSIC ORCID; Pérez, José Manuel; Zuckerkandl, Emilie; Alonso, Carlos CSIC | Palabras clave: | Human genome Barcode Genetic information Intron Exon |
Fecha de publicación: | 4-dic-2011 | Editor: | Springer Nature | Citación: | Journal of Molecular Evolution 72: 1-13 (2011) | Resumen: | This report deals with the study of compositional properties of human gene sequences evaluating similarities and differences among functionally distinct sectors of the gene independently of the reading frame. To retrieve the compositional information of DNA, we present a neighbor base dependent coding system in which the alphabet of 64 letters (DNA triplets) is compressed to an alphabet of 14 letters here termed triplet composons. The triplets containing the same set of distinct bases in whatever order and number form a triplet composon. The reading of the DNA sequence is performed starting at any letter of the initial triplet and then moving, triplet-to-triplet, until the end of the sequence. The readings were made in an overlapping way along the length of the sequences. The analysis of the compositional content in terms of the composon usage frequencies of the gene sequences shows that: (i) the compositional content of the sequences is far from that of random sequences, even in the case of non-protein coding sequences; (ii) coding sequences can be classified as components of compositional clusters; and (iii) intron sequences in a cluster have the same composon usage frequencies, even as their base composition differs notably from that of their home coding sequences. A comparison of the composon usage frequencies between human and mouse homologous genes indicated that two clusters found in humans do not have their counterpart in mouse whereas the others clusters are stable in both species with respect to their composon usage frequencies in both coding and noncoding sequences. | Versión del editor: | http://dx.doi.org/10.1007/s00239-010-9411-6 | URI: | http://hdl.handle.net/10261/57668 | DOI: | 10.1007/s00239-010-9411-6 | ISSN: | 0022-2844 | E-ISSN: | 1432-1432 |
Aparece en las colecciones: | (CBM) Artículos |
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