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[Evolutionary aspects of protein structure and folding].
I N Berezovskiĭ1, E N Trifonov
1Department of Structural Biology, Weizmann Institute of Science, Rehovot, 76100, Israel. Igor.Berezovsky@weizmann.ac.il
Molekuliarnaia Biologiia
|May 19, 2001
Summary
Protein structure evolved through four stages, starting with short peptides and progressing to complex multidomain proteins via gene fusion. This evolutionary path highlights the formation of closed loops and their subsequent assembly into larger functional units.
Area of Science:
- Biochemistry
- Molecular Biology
- Evolutionary Biology
Context:
- Understanding the evolutionary trajectory of protein structure is crucial for deciphering fundamental biological processes.
- Reconstructing early protein evolution provides insights into the origin of genetic material and protein function.
Purpose:
- To describe the four fundamental stages in the evolution of protein structure.
- To reconstruct the earliest events in protein evolution based on current research.
Summary:
- The evolution began with short peptides, followed by the formation of 25-30 residue closed loops, optimal for polypeptide chain ring closure.
- Subsequent stages involved the fusion of genes encoding these loops, leading to 4-6 loop structures (100-200 residues) and eventually multidomain proteins through DNA unit fusion.
Impact:
- This model provides a framework for understanding the stepwise assembly of protein architecture.
- It sheds light on the relationship between gene structure, protein folding, and evolutionary innovation.