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Genomics

Genomics

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...

Genome-wide Association Studies-GWAS

Genome-wide Association Studies-GWAS

Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...

Genomic DNA in Eukaryotes

Genomic DNA in Eukaryotes

Eukaryotes have large genomes compared to prokaryotes. To fit their genomes into a cell, eukaryotic DNA is packaged extraordinarily tightly inside the nucleus. To achieve this, DNA is tightly wound around proteins called histones, which are packaged into nucleosomes that are joined by linker DNA and coil into chromatin fibers. Additional fibrous proteins further compact the chromatin, which is recognizable as chromosomes during certain phases of cell division.

Genome Size and the Evolution of New Genes

Genome Size and the Evolution of New Genes

While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.

Genome Size and the Evolution of New Genes

Genome Size and the Evolution of New Genes

While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.

Genome Annotation and Assembly

Genome Annotation and Assembly

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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Related Experiment Video

Updated: Jun 7, 2026

An Integrated Approach for Microprotein Identification and Sequence Analysis

An Integrated Approach for Microprotein Identification and Sequence Analysis

Published on: July 12, 2022

ENCODE whole-genome data in the UCSC genome browser (2011 update).

Brian J Raney¹, Melissa S Cline, Kate R Rosenbloom

¹Center for Biomolecular Science and Engineering, School of Engineering and Howard Hughes Medical Institute, University of California Santa Cruz, Santa Cruz, CA 95064, USA. braney@soe.ucsc.edu

Nucleic Acids Research

|November 2, 2010

Summary

The ENCODE project catalogs functional elements in the human genome. Data on transcription factor binding, histone marks, and RNA expression is accessible via the UCSC Genome Browser.

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Area of Science:

Genomics
Bioinformatics
Molecular Biology

Background:

The ENCODE (Encyclopedia of DNA Elements) project is an international research consortium.
Its primary objective is to identify and catalog all functional elements within the human genome.
The ENCODE Data Coordination Center (DCC) at UC Santa Cruz manages and distributes this extensive dataset.

Purpose of the Study:

To provide a comprehensive resource of high-throughput, genome-wide data.
To facilitate the study of various genomic and epigenomic features.
To make functional genomic data easily accessible for research and visualization.

Main Methods:

Utilizing high-throughput technologies such as ChIP-Seq, RNA-Seq, and DNAse-Seq.
Generating genome-wide data including sequence alignments, signal data, and element/peak calls.
Implementing a metadata system to capture experimental parameters for each assay.

Main Results:

Cataloging diverse functional elements including transcription factor-binding sites, histone modifications, and chromatin accessibility.
Providing data on RNA expression and RNA binding patterns.
Making data available through the UCSC Genome Browser and a dedicated metadata system.

Conclusions:

The ENCODE DCC provides a valuable, centralized repository for functional genomics data.
The data enables detailed investigation of genome function and cell-state indicators.
Accessible data formats and visualization tools promote broad scientific utilization.