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Updated: Dec 23, 2025

Promoter Capture Hi-C: High-resolution, Genome-wide Profiling of Promoter Interactions
Published on: June 28, 2018
High affinity between CREBBP/p300 and NCOA evolved in vertebrates
Elin Karlsson1, Amanda Lindberg1, Eva Andersson1
1Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden.
The high-affinity interaction between CREBBP/p300 and NCOA protein domains evolved in vertebrates, not all deuterostomes. This finding impacts understanding of transcriptional regulation evolution.
Area of Science:
- Evolutionary biology
- Molecular biology
- Genetics
Background:
- The interaction between transcriptional coactivators CREBBP/p300 and NCOA is crucial for gene regulation.
- This interaction is mediated by intrinsically disordered domains: NCBD (from CREBBP/p300) and CID (from NCOA).
- The CID domain appeared in deuterostomes, but the evolution of high-affinity interaction within this clade is unclear.
Purpose of the Study:
- To investigate the evolutionary timeline of the high-affinity NCBD:CID interaction within deuterostomes.
- To determine if all extant deuterostome species possess this high-affinity interaction.
Main Methods:
- Expression and affinity measurement of NCBD and CID domains from various deuterostome species.
- Comparative analysis of interaction affinities across different evolutionary branches.
Main Results:
- All examined vertebrate species exhibit high-affinity NCBD:CID interactions.
- The interaction in the purple sea urchin (an echinoderm) shows similar affinity to proposed ancestral domains.
- This suggests the high-affinity interaction likely evolved specifically within the vertebrate lineage.
Conclusions:
- The high-affinity interaction between CREBBP/p300 and NCOA appears to have evolved in vertebrates.
- The essentiality of this interaction in non-vertebrate deuterostomes is questioned.
- Provides an example of transcriptional regulation evolution via protein-domain innovations.
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