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Pribnow box

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Title: Pribnow box  
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Subject: Bacterial transcription, Molecular biology, TATA box, Post-transcriptional regulation, Regulatory sequences
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Pribnow box

The Pribnow box (also known as the Pribnow-Schaller box) is the sequence TATAAT of six nucleotides (thymine-adenine-thymine-etc.) that is an essential part of a promoter site on DNA for transcription to occur in bacteria.[1][2] It is an idealized or consensus sequence—that is, it shows the most frequently occurring base at each position in a large number of promoters analyzed; individual promoters often vary from the consensus at one or more positions. It is also commonly called the -10 sequence, because it is centered roughly 10 base pairs upstream from the site of initiation of transcription.

The Pribnow box has a function similar to the TATA box that occurs in promoters in eukaryotes and archaea: it is recognized and bound by a subunit of RNA polymerase during initiation of transcription. This region of the DNA is also the first place where base pairs separate during prokaryotic transcription to allow access to the template strand. The AT-richness is important to allow this separation, since adenine and thymine are easier to break apart (not due to the hydrogen bond count[3]).

It is named after David Pribnow and Heinz Schaller.[1][2]

Probability of occurrence of each nucleotide in E. coli[4]

T A T A A T
82% 89% 52% 59% 49% 89%

See also

References

  1. ^ a b Pribnow, David (March 1975). "Nucleotide sequence of an RNA polymerase binding site at an early T7 promoter".  
  2. ^ a b Schaller, Heinz; Gray, Christopher; Herrman, Karin (February 1975). "Nucleotide sequence of an RNA polymerase binding site from the DNA of Bacteriophage fd".  
  3. ^ Yakovchuk, Peter; Protozanova, Ekaterina; Frank-Kamenetskii, Maxim D. (January 2006). "Base-stacking and base-pairing contributions into thermal stability of the DNA double helix".  
  4. ^ Harley, Calvin B.; Reynolds, Robert P. (March 1987). promoter sequences"E. coli"Analysis of (PDF, 0.9 MB).  
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