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 GTTCGGNNANCCNNAC (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 GTTCGGNNANCCNNAC, 0.
  2. positive strand, negative direction, looking for GTTCGGNNANCCNNAC, 0.
  3. positive strand, positive direction, looking for GTTCGGNNANCCNNAC, 0.
  4. negative strand, positive direction, looking for GTTCGGNNANCCNNAC, 0.
  5. complement, negative strand, negative direction, looking for CAAGCCNNTNGGNNTG, 0.
  6. complement, positive strand, negative direction, looking for CAAGCCNNTNGGNNTG, 0.
  7. complement, positive strand, positive direction, looking for CAAGCCNNTNGGNNTG, 0.
  8. complement, negative strand, positive direction, looking for CAAGCCNNTNGGNNTG, 0.
  9. inverse complement, negative strand, negative direction, looking for GTNNGGNTNNCCGAAC, 0.
  10. inverse complement, positive strand, negative direction, looking for GTNNGGNTNNCCGAAC, 0.
  11. inverse complement, positive strand, positive direction, looking for GTNNGGNTNNCCGAAC, 0.
  12. inverse complement, negative strand, positive direction, looking for GTNNGGNTNNCCGAAC, 0.
  13. inverse negative strand, negative direction, looking for CANNCCNANNGGCTTG, 0.
  14. inverse positive strand, negative direction, looking for CANNCCNANNGGCTTG, 0.
  15. inverse positive strand, positive direction, looking for CANNCCNANNGGCTTG, 0.
  16. inverse negative strand, positive direction, looking for CANNCCNANNGGCTTG, 0.

K-box1 samplings

Copying a responsive elements consensus sequence GTTCGG and putting the sequence in "⌘F" finds one between ZNF497 and A1BG and one between ZSCAN22 and A1BG as can be found by the computer programs.

For the Basic programs testing consensus sequence GTTCGG (starting with SuccessablesK-box1.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: 1, GTTCGG at 456.
  2. Positive strand, negative direction: 0.
  3. Negative strand, positive direction: 0.
  4. Positive strand, positive direction: 1, GTTCGG at 340.
  5. inverse complement, negative strand, negative direction: 1, CCGAAC at 3400.
  6. inverse complement, positive strand, negative direction: 0.
  7. inverse complement, negative strand, positive direction: 0.
  8. inverse complement, positive strand, positive direction: 0.

K-box1 (4560-2846) UTRs

  1. Negative strand, negative direction: CCGAAC at 3400.

K-box1 negative direction (2596-1) distal promoters

  1. Negative strand, negative direction: GTTCGG at 456.

K-box1 positive direction (4050-1) distal promoters

  1. Positive strand, positive direction: GTTCGG at 340.

K-box1 random dataset samplings

  1. K-box1r0: 0.
  2. K-box1r1: 2, GTTCGG at 2953, GTTCGG at 1973.
  3. RDr2: 0.
  4. RDr3: 0.
  5. RDr4: 0.
  6. RDr5: 0.
  7. RDr6: 0.
  8. RDr7: 0.
  9. RDr8: 0.
  10. RDr9: 0.
  11. RDr0ci: 0.
  12. RDr1ci: 0.
  13. RDr2ci: 0.
  14. RDr3ci: 0.
  15. RDr4ci: 0.
  16. RDr5ci: 0.
  17. RDr6ci: 0.
  18. RDr7ci: 0.
  19. RDr8ci: 0.
  20. RDr9ci: 0.

RDr arbitrary (evens) (4560-2846) UTRs

K-box1r alternate (odds) (4560-2846) UTRs

  1. K-box1r1: GTTCGG at 2953.

RDr arbitrary negative direction (evens) (2846-2811) core promoters

RDr alternate negative direction (odds) (2846-2811) core promoters

RDr arbitrary positive direction (odds) (4445-4265) core promoters

RDr alternate positive direction (evens) (4445-4265) core promoters

RDr arbitrary negative direction (evens) (2811-2596) proximal promoters

RDr alternate negative direction (odds) (2811-2596) proximal promoters

RDr arbitrary positive direction (odds) (4265-4050) proximal promoters

RDr alternate positive direction (evens) (4265-4050) proximal promoters

RDr arbitrary negative direction (evens) (2596-1) distal promoters

K-box1r alternate negative direction (odds) (2596-1) distal promoters

  1. K-box1r1: GTTCGG at 1973.

K-box1r arbitrary positive direction (odds) (4050-1) distal promoters

  1. K-box1r1: GTTCGG at 2953, GTTCGG at 1973.

RDr alternate positive direction (evens) (4050-1) distal promoters

K-box1 analysis and results

"This DNA element (GTTCGG-NNAN-CCNNAC) is located upstream of the groE promoters."[1]

Reals or randoms Promoters direction Numbers Strands Occurrences Averages (± 0.1)
Reals UTR negative 1 2 0.5 0.5 ± 0.5 (--1,+-0)
Randoms UTR arbitrary negative 0 10 0 0
Randoms UTR alternate negative 0 10 0 0
Reals Core negative 0 2 0 0
Randoms Core arbitrary negative 0 10 0 0
Randoms Core alternate negative 0 10 0 0
Reals Core positive 0 2 0 0
Randoms Core arbitrary positive 0 10 0 0
Randoms Core alternate positive 0 10 0 0
Reals Proximal negative 0 2 0 0
Randoms Proximal arbitrary negative 0 10 0 0
Randoms Proximal alternate negative 0 10 0 0
Reals Proximal positive 0 2 0 0
Randoms Proximal arbitrary positive 0 10 0 0
Randoms Proximal alternate positive 0 10 0 0
Reals Distal negative 1 2 0.5 0.5 ± 0.5 (--1,+-0)
Randoms Distal arbitrary negative 0 10 0 0
Randoms Distal alternate negative 0 10 0 0
Reals Distal positive 1 2 0.5 0.5 ± 0.5 (-+0,++1)
Randoms Distal arbitrary positive 0 10 0 0
Randoms Distal alternate positive 0 10 0 0

Comparison:

The occurrences of real responsive K-box1s are greater than the randoms. This suggests that the real K-box1s are likely active or activable.

Acknowledgements

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

See also

References

  1. 1.0 1.1 Masakazu Saito, Satoru Watanabe, Kaori Nimura-Matsune, Hirofumi Yoshikawa, 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.

External links