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Computer modelling of DNA structures involved in chromosome maintenance
1Department of Biological Sciences, Purdue University, West Lafayette, IN 47907.
Nucleic Acids Research
|October 26, 1987
Summary
Computer analysis reveals DNA sequence-dependent bending. This method accurately predicts DNA structures, offering insights into DNA bending in chromosome maintenance, centromeric, and autonomous replicating sequences.
Area of Science:
- Molecular Biology
- Bioinformatics
- Genetics
Background:
- DNA sequence influences three-dimensional structure.
- Understanding DNA bending is crucial for chromosome function.
Purpose of the Study:
- To investigate sequence-dependent DNA bending in synthetic and natural DNA molecules using computer analysis.
- To explore the role of DNA structure in chromosome maintenance, including centromeric and autonomous replicating sequences.
Main Methods:
- Computer modeling of synthetic oligonucleotides and natural DNA sequences (107 kb).
- Validation of computational models against published electrophoretic data.
- Analysis of DNA structural domains and sequence elements in functional genomic regions.
Main Results:
- Computational models accurately predicted DNA bending behavior, aligning with experimental data.
- Centromeric DNAs from yeast exhibit unusually straight sequences in functional elements.
- Autonomous replicating sequences possess distinct structural domains: straight consensus regions and bending flanking DNA.
- Shared sequence elements were identified between centromeric and autonomous replicating sequences.
Conclusions:
- Computer modeling is a powerful and predictive tool for studying DNA structure and function.
- Specific DNA sequence features dictate DNA bending, impacting key genomic processes like chromosome maintenance.
- Structural and sequence homologies suggest functional relationships between centromeric and autonomous replicating sequences.