Expansion of Protein Domain Repeats
Author Information
Author(s): Björklund Åsa K, Ekman Diana, Elofsson Arne
Primary Institution: Stockholm University, Stockholm, Sweden
Hypothesis
The study investigates how frequent duplications of multiple domains occur in protein domain repeats.
Conclusion
The study found that repeat regions are most often created from the duplication of several domains at a time, while duplication of one domain is less common.
Supporting Evidence
- Many proteins, especially in eukaryotes, contain tandem repeats of several domains from the same family.
- The internal sequence similarity in each protein revealed that the domain repeats are often expanded through duplications of several domains at a time.
- Some domain families show distinct duplication patterns, indicating that duplication of a certain number of domains may be favored.
Takeaway
Proteins are made of building blocks called domains, and sometimes these blocks repeat themselves. This study looked at how those repeats happen and found that often, several blocks are copied together.
Methodology
The study analyzed the proteomes of 24 species and used domain assignments to investigate the evolution, function, and distribution of protein domain repeats.
Limitations
The study does not account for domain deletions and may miss some domains in the assignment process.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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