4.6 Article

iRO-PsekGCC: Identify DNA Replication Origins Based on Pseudo k-Tuple GC Composition

Journal

FRONTIERS IN GENETICS
Volume 10, Issue -, Pages -

Publisher

FRONTIERS MEDIA SA
DOI: 10.3389/fgene.2019.00842

Keywords

replication origin identification; pseudo k-tuple GC composition; random forest; web-server; DNA sequence analysis

Funding

  1. National Natural Science Foundation of China [61672184, 61732012, 61822306]
  2. Fok Ying-Tung Education Foundation for Young Teachers in the Higher Education Institutions of China [161063]
  3. Shenzhen Overseas High Level Talents Innovation Foundation [KQJSCX20170327161949608]
  4. Guangdong Natural Science Funds for Distinguished Young Scholars [2016A030306008]
  5. Scientific Research Foundation in Shenzhen [JCYJ20180306172207178]

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Identification of replication origins is playing a key role in understanding the mechanism of DNA replication. This task is of great significance in DNA sequence analysis. Because of its importance, some computational approaches have been introduced. Among these predictors, the iRO-3wPseKNC predictor is the first discriminative method that is able to correctly identify the entire replication origins. For further improving its predictive performance, we proposed the Pseudo k-tuple GC Composition (PsekGCC) approach to capture the GC asymmetry bias of yeast species by considering both the GC skew and the sequence order effects of k-tuple GC Composition (k-GCC) in this study. Based on PseKGCC, we proposed a new predictor called iRO-PsekGCC to identify the DNA replication origins. Rigorous jackknife test on two yeast species benchmark datasets (Saccharomyces cerevisiae, Pichia pastoris) indicated that iRO-PsekGCC outperformed iRO-3wPseKNC. It can be anticipated that iRO-PsekGCC will be a useful tool for DNA replication origin identification. Availability and implementation: The web-server for the iRO-PsekGCC predictor was established, and it can be accessed at http://bliulab.net/iRO-PsekGCC/.

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