Ahmad R Hariri1, Venkata S Mattay, Alessandro Tessitore

  • 1Clinical Brain Disorders Branch, Intramural Research Program, National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892, USA.

Science (New York, N.Y.)
|July 20, 2002
PubMed
まとめ

セロトニントランスポーター遺伝子の短いアレル (SLC6A4) は,恐怖に対する反応として桃体活性度の上昇と関連しています. この遺伝的変異は,短いSLC6A4アレルに関連した不安や恐怖の行動の増加を説明する可能性がある.

関連する概念動画

Multiple Allele Traits01:49

Multiple Allele Traits

The Concept of Multiple Allelism
Mismatch Repair01:36

Mismatch Repair

Overview
Mutations01:39

Mutations

Overview
Gene Conversion02:08

Gene Conversion

Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
Exon Recombination02:32

Exon Recombination

The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes. 
Exon shuffling follows “splice frame rules.” Each exon has three reading...
Mismatch Repair01:20

Mismatch Repair

Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...