Cited by 20Forensic and Genetic ResearchGenetic Associations and EpidemiologyPleistocene-Era Hominins and Archaeology

Regional selection of the brain size regulating gene CASC5 provides new insight into human brain evolution

Shi, Lei, Hu, Enzhi, Wang, Zhenbo, Liu, Jiewei, Li, Jin, Li, Ming, Chen, Hua, Yu, Chunshui +2 more·2017·Human Genetics

Abstract

Human evolution is marked by a continued enlargement of the brain. Previous studies on human brain evolution focused on identifying sequence divergences of brain size regulating genes between humans and nonhuman primates. However, the evolutionary pattern of the brain size regulating genes during recent human evolution is largely unknown. We conducted a comprehensive analysis of the brain size regulating gene CASC5 and found that in recent human evolution, CASC5 has accumulated many modern human specific amino acid changes, including two fixed changes and six polymorphic changes. Among human populations, 4 of the 6 amino acid polymorphic sites have high frequencies of derived alleles in East Asians, but are rare in Europeans and Africans. We proved that this between-population allelic divergence was caused by regional Darwinian positive selection in East Asians. Further analysis of brain image data of Han Chinese showed significant associations of the amino acid polymorphic sites with gray matter volume. Hence, CASC5 may contribute to the morphological and structural changes of the human brain during recent evolution. The observed between-population divergence of CASC5 variants was driven by natural selection that tends to favor a larger gray matter volume in East Asians.

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Crossref · 10.1007/s00439-016-1748-5

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Authors
Shi, L., Hu, E., Wang, Z., Liu, J., Li, J., Li, M., Chen, H., Yu, C., Jiang, T., & Su, B.
Affiliations
  • Kunming Institute of Zoology (CN)
  • Chinese Academy of Sciences (CN)
  • Johns Hopkins University (US)
  • Tianjin Medical University General Hospital (CN)
  • University of Electronic Science and Technology of China (CN)
Corresponding author
Su, Bing
Venue
Human Genetics
Published
2016-11-22
Volume
136
Issue
2
Pages
193-204
ISSN
  • 0018-7348 (ISSN-L)
  • 0340-6717
  • 1432-1203
OpenAlex
W2553400254
Cited by
20
References
57
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2023: 3 · 2022: 3 · 2021: 1 · 2020: 4 · 2019: 3 · 2018: 1 · 2017: 1
FWCI
1.35
Type
journal article
Language
en
Open access
closed
Locations
  • Human Genetics (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Natural Science Foundation of China (31130051)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Forensic and Genetic Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Social Sciences › Anthropology › Pleistocene-Era Hominins and Archaeology
Keywords
human brain evolution, positive selection, regional selection, amino acid polymorphism, gray matter volume, East Asian populations, Han Chinese, brain structure
MeSH terms
Adult, Alleles, Animals, Brain, Pan troglodytes, Biological Evolution, Female, Gene Expression Regulation, Gene Frequency, Haplotypes, Humans, Image Processing, Computer-Assisted, Macaca, Magnetic Resonance Imaging, Male, Microtubule-Associated Proteins, Middle Aged, Organ Size, Selection, Genetic, Linkage Disequilibrium, Genome, Human, Linear Models, Sequence Alignment, Sequence Analysis, DNA, Polymorphism, Single Nucleotide, Asian People, Young Adult, Genetic Fitness, Genotyping Techniques, Gray Matter

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