Related Experiment Video
Updated: Feb 13, 2026
08:19
Quantitative Comparison of cis-Regulatory Element CRE Activities in Transgenic Drosophila melanogaster
Published on: December 19, 2011
12.3K
The human intelligence evolved from proximal cis-regulatory saltations.
Xiaojie Li1,2, Jianhui Shi1,2, Lei M Li1,2
1Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing China.
Quantitative Biology (Beijing, China)
|February 12, 2026
Summary
Human and chimpanzee genomes differ by only 1.23%, yet exhibit significant phenotypic differences. Gene regulation evolution shows both gradual and saltational modes, explaining unique human cognition and intelligence at the molecular level.
Area of Science:
- Genomics
- Evolutionary Biology
- Molecular Biology
Background:
- Human and chimpanzee genomes show minimal divergence (1.23%).
- Phenotypic differences are hypothesized to stem from gene regulation.
- Understanding gene regulation evolution is key to explaining human uniqueness.
Purpose of the Study:
- To investigate quantitative and qualitative changes in gene regulation across hominid evolution.
- To identify molecular-level changes associated with human cognition and intelligence.
- To explore the evolutionary modes (gradual vs. saltational) of gene regulation.
Main Methods:
- Construction of cis-regulatory element frequency (CREF) matrices for hominid species.
- Decomposition of CREF matrices into dual eigen-modules.
- Comparative analysis of CREF modules across four hominid species.
Main Results:
- Identified two saltations in CREF modules: between 4th-5th and 9th-10th eigen-levels.
- Linked these saltations to unique human cognitive traits (memory, language, social behavior, learning).
- Observed increased motifs on Alu elements correlating with specific eigen-vectors.
Conclusions:
- Gene regulation evolution exhibits both gradual and saltational modes, unlike protein sequence evolution.
- CREF profiles can identify unique human cognition and intelligence without a priori knowledge.
- Saltational changes in gene regulation at the molecular level underpin human evolutionary distinctiveness.
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