K-box gene transcriptions

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Associate Editor(s)-in-Chief: Henry A. Hoff

"In fact, the groE genes were greatly induced upon heat shock in the hrcA mutant which was dark-treated prior to the heat shock in order to keep the background initial level of the groE mRNA accumulation as low as possible. These results led us to find a novel regulatory sequence which is involved in a heat and/or light mediated regulation of the groESL1 operon (Kojima and Nakamoto, 2007). This DNA element (GTTCGG-NNAN-CCNNAC) is located upstream of the groE promoters. It is highly conserved among the groESL1 operons from various cyanobacterial genomes. We designated this DNA element to be K-box. Removal of the K-box containing region upstream of the groESL1 promoter abolished heat- and/or light-induced transcription of the operon completely. K-box is also present upstream of dnaK2, one of the three dnaK genes in cyanobacteria (Kojima and Nakamoto, 2007; Sato et al., 2007)."[1]

K-box samplings

Copying a responsive elements consensus sequence GTTCGG-NNAN-CCNNAC and putting the sequence in "⌘F" finds none between ZNF497 and A1BG or none between ZSCAN22 and A1BG as can be found by the computer programs.

For the Basic programs testing consensus sequence GTTCGG-NNAN-CCNNAC (starting with SuccessablesK-box.bas) written to compare nucleotide sequences with the sequences on either the template strand (-), or coding strand (+), of the DNA, in the negative direction (-), or the positive direction (+), the programs are, are looking for, and found:

  1. negative strand, negative direction, looking for AAAAAAAA, 0.
  2. positive strand, negative direction, looking for AAAAAAAA, 0.
  3. positive strand, positive direction, looking for AAAAAAAA, 0.
  4. negative strand, positive direction, looking for AAAAAAAA, 0.
  5. complement, negative strand, negative direction, looking for TTTTTTTT, 0.
  6. complement, positive strand, negative direction, looking for TTTTTTTT, 0.
  7. complement, positive strand, positive direction, looking for TTTTTTTT, 0.
  8. complement, negative strand, positive direction, looking for TTTTTTTT, 0.
  9. inverse complement, negative strand, negative direction, looking for TTTTTTTT, 0.
  10. inverse complement, positive strand, negative direction, looking for TTTTTTTT, 0.
  11. inverse complement, positive strand, positive direction, looking for TTTTTTTT, 0.
  12. inverse complement, negative strand, positive direction, looking for TTTTTTTT, 0.
  13. inverse negative strand, negative direction, looking for AAAAAAAA, 0.
  14. inverse positive strand, negative direction, looking for AAAAAAAA, 0.
  15. inverse positive strand, positive direction, looking for AAAAAAAA, 0.
  16. inverse negative strand, positive direction, looking for AAAAAAAA, 0.

K-box UTRs

K-box core promoters

K-box proximal promoters

K-box distal promoters

Acknowledgements

The content on this page was first contributed by: Henry A. Hoff.

See also

References

  1. Masakazu Saito, Satoru Watanabe, Kaori Nimura-Matsune, Hirofumi Yoshikawa1, 8 Hitoshi Nakamoto (10 April 2020). "Regulation of the groESL1 transcription by the HrcA repressor and a novel transcription factor Orf7.5 in the cyanobacterium Synechococcus elongatus PCC7942". The Journal of General and Applied Microbiology. 66 (2): 85–92. doi:10.2323/jgam.2020.02.001. Retrieved 17 March 2021. line feed character in |author= at position 76 (help)

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