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Genome Annotation and Assembly03:36

Genome Annotation and Assembly

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The genome refers to all of the genetic material in an organism. It can range from a few million base pairs in microbial cells to several billion base pairs in many eukaryotic organisms. Genome assembly refers to the process of taking the DNA sequencing data and putting it all back together in a correct order to create a close representation of the original genome. This is followed by the identification of functional elements on the newly assembled genome, a process called genome annotation.
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Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
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Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
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Trial and Error and Algorithm01:12

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A problem-solving strategy is a plan of action used to find a solution. Different strategies have distinct action plans. Trial and error involves trying different solutions until one works. For instance, to fix a broken printer, you might check ink levels, ensure the paper tray isn't jammed, and verify the printer's connection to your laptop. This method can be time-consuming but is commonly used. Thomas Edison, for example, used trial and error to find a suitable filament for the light...
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Genomic Imprinting and Inheritance02:30

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Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
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Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
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Related Experiment Video

Updated: Jan 23, 2026

Hybrid De Novo Genome Assembly for the Generation of Complete Genomes of Urinary Bacteria using Short- and Long-read Sequencing Technologies
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Hybrid De Novo Genome Assembly for the Generation of Complete Genomes of Urinary Bacteria using Short- and Long-read Sequencing Technologies

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Modern technologies and algorithms for scaffolding assembled genomes.

Jay Ghurye1, Mihai Pop1

  • 1Department of Computer Science and Center for Bioinformatics and Computational Biology, University of Maryland, College Park, Maryland, United States of America.

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|June 6, 2019
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Summary

Long-read sequencing simplifies genome reconstruction, especially for small genomes. New chromatin structure technologies improve assembly of complex eukaryotic genomes, overcoming fragmentation challenges.

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Area of Science:

  • Genomics
  • Bioinformatics
  • Computational Biology

Background:

  • Shotgun sequencing and long-read technologies have advanced genome reconstruction.
  • Complete genome assembly is feasible for small genomes but challenging for large, complex ones.

Purpose of the Study:

  • To survey technologies and algorithms for assembling large eukaryotic genomes.
  • To provide historical context for genome scaffolding technologies.

Main Methods:

  • Review of recent chromatin structure capture technologies.
  • Analysis of algorithms for assembling and analyzing large eukaryotic genomes.
  • Historical perspective on genome scaffolding.

Main Results:

  • Long-read sequencing significantly simplifies genome reconstruction.
  • Chromatin structure technologies enhance genome contiguity for complex genomes.
  • Despite advances, large eukaryotic genome assembly remains challenging.

Conclusions:

  • Recent technologies dramatically improve large eukaryotic genome assembly.
  • Combining sequencing data with chromatin structure information is key.
  • Continued development of scaffolding technologies is crucial for genomics.