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Updated: Jun 2, 2026
09:45
Detection of Copy Number Alterations Using Single Cell Sequencing
Published on: February 17, 2017
Efficient algorithms for tandem copy number variation reconstruction in repeat-rich regions
Dan He1, Farhad Hormozdiari, Nicholas Furlotte
1Department of Computer Science, University of California Los Angeles, Los Angeles, CA 90095, USA.
Bioinformatics (Oxford, England)
|April 21, 2011
Summary
This study introduces an efficient algorithm for accurately identifying and reconstructing copy number variations (CNVs) in repeat-rich genomic regions, overcoming challenges posed by multi-mapping reads.
Area of Science:
- Genomics
- Bioinformatics
Background:
- Structural variations, particularly copy number variations (CNVs), significantly impact diseases and traits.
- High-throughput sequencing technologies offer new avenues for CNV identification.
- Current methods struggle with CNV detection in repeat-rich regions due to multi-mapping reads.
Purpose of the Study:
- To develop an efficient algorithm for CNV identification and reconstruction in repeat-rich regions.
- To address the challenge of multi-mapping reads in CNV analysis.
Main Methods:
- Developed a novel algorithm to process multi-mapping reads.
- Applied the algorithm to identify and reconstruct CNVs in complex genomic regions.
Main Results:
- The proposed algorithm accurately reconstructs CNVs even in repeat-rich areas.
- The method demonstrates computational efficiency.
- This is the first approach to both identify and reconstruct CNVs in repeat-rich regions.
Conclusions:
- The developed algorithm provides an accurate and efficient solution for CNV analysis in challenging genomic regions.
- This advancement has implications for understanding the genetic basis of diseases and traits influenced by structural variations.
Related Concept Videos
02:26Comparing Copy Number Variations and SNPs
Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
02:46Genome Copying Errors
DNA replication is a well-evolved process that copies millions of base pairs with high fidelity during each cell division. Occasionally a wrong base or a long stretch of wrong bases may get added to the daughter strands. If the errors are left unchecked, cells might accumulate several mutations that might endanger their survival. Therefore, the copying errors are checked and repaired at three levels.
02:37Gene Duplication and Divergence
The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are characterized.
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02:53Conservative Site-specific Recombination and Phase Variation
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The recognition sites for Cre recombinase called LoxP...
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