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Long-range correlation properties of coding and noncoding DNA sequences: GenBank analysis

S V Buldyrev1, A L Goldberger, S Havlin

  • 1Deparment of Physics, Boston University, Massachusetts 02215, USA.

Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
|May 1, 1995
PubMed
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Coding DNA lacks long-range correlations, while noncoding DNA exhibits them. This significant difference in DNA sequence properties was confirmed using Fast Fourier Transform (FFT) and Detrended Fluctuation Analysis (DFA).

Area of Science:

  • Computational molecular biology
  • Genomics
  • Bioinformatics

Background:

  • A key question in molecular biology concerns the presence of long-range correlations in DNA sequences.
  • Understanding these correlations is crucial for deciphering DNA's functional organization.

Purpose of the Study:

  • To investigate and statistically differentiate the long-range correlation properties between coding and noncoding eukaryotic DNA sequences.
  • To determine if coding DNA exhibits long-range correlations similar to noncoding DNA.

Main Methods:

  • Analysis of 33,301 coding and 29,453 noncoding eukaryotic DNA sequences (length > 512 bp) from GenBank.
  • Application of Fast Fourier Transform (FFT) to analyze spectral exponent (beta).
  • Independent validation using Detrended Fluctuation Analysis (DFA) to account for DNA's mosaic structure.
Keywords:
NASA Discipline CardiopulmonaryNASA Discipline Number 14-10Non-NASA Center

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Main Results:

  • Coding sequences showed no significant long-range correlations (beta = 0.00 +/- 0.04).
  • Noncoding sequences displayed significant long-range correlations (average beta = 0.16 +/- 0.05).
  • The probability of coding and noncoding data originating from the same distribution was less than 10^-10.

Conclusions:

  • Coding and noncoding DNA possess statistically distinct long-range correlation properties.
  • Noncoding DNA exhibits clear long-range correlations, absent in coding DNA.
  • The findings were robustly confirmed by both FFT and DFA methods.