X box gene transcriptions

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Editor-In-Chief: Henry A. Hoff

"The so-called X (or X1) box in the promoter of the human MHC class II DRA gene is the binding site for a ubiquitous mammalian sequence-specific DNA-binding protein called RFX, NF-X, NF-Xc, or RFX1 (4,19,23,24,27)."[1]

"RFX is MDBP [...] the MDBP (RFX) recognition site region in the DRA promoter can be considered to extend from positions -100 to -112 [...] a possible binding site for MDBP which begins 88 bp after the first residue of the presumably full-length RFX1 (MDBP) cDNA (26). This site (RFX+88) is as follows: 5'-GTTGGCATGGCAAC-3'."[1]

X-box motifs

"Based on sequence variability in the X box region (position -188 to -152), three different sequence motifs can be distinguished (X-A, X-B and X-C). Identical bases are marked by a dash; the region of the X1 box is underlined; the region corresponding to the X2 box is given in italics."[2]

X2 box is 5'-AGGTCCA-3'.[2]

X-A box is 5'-AAAAAAAA//TCTGCCCAGAGACAGATGAGGTCCA-3', where TG is missing at //, which contains X1 = 5'-CCCAGAGACAGATGA-3' and disrupts the palindrome 5'- TGTCNNNNNNNNGACA-3' .[2]

X-B box is 5'-AAAAAAAATGTCTGCCTAGAGACAGATTAGGTCCA-3' which contains X1 = 5'-CCTAGAGACAGATTA-3' and the palindrome 5'-CCTANNNNNNNNNTAGG-3'.[2]

X-C box is 5'-AAAAAAAATGTCTGCCTAGAGACAGATGAGGTCCA-3' which contains X1 = 5'-TGCCTAGAGAC-3' and the palindrome 5'-CCTANNNNNNNNNTAGG-3'.[2]

Consensus sequences

"In order to define a candidate gene set of direct DAF‐19 targets, we first searched the X‐box consensus GTTNCCATGGNAAC from Swoboda et al. (2000), GTYNCYATRGYAAC from Blacque et al. (2005), and GTHNYYATRRNAAC from Efimenko et al. (2005) in the P. pacificus Hybrid1 assembly."[3] Y = (C/T), R = (A/G), N = (A, C, G, T), H = (A/C/T).

GTTNCCATGGNAAC, GT(C/T)NC(C/T)AT(A/G)G(C/T)AAC, GT(A/C/T)N(C/T)(C/T)AT(A/G)(A/G)NAAC generalizes to GT(A/C/T)N(C/T)(C/T)AT(A/G)(A/G)NAAC.

Xbox samplings

For the Basic programs (starting with SuccessablesXbox.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 (+), including extending the number of nts from 958 to 4445, the programs are, are looking for, and found:

  1. negative strand in the negative direction (from ZSCAN22 to A1BG) is SuccessablesXbox--.bas, looking for 3'-GTTGGCATGGCAAC-5', 0,
  2. negative strand in the positive direction (from ZNF497 to A1BG) is SuccessablesXbox-+.bas, looking for 3'-GTTGGCATGGCAAC-5', 0,
  3. positive strand in the negative direction is SuccessablesXbox+-.bas, looking for 3'-GTTGGCATGGCAAC-5', 0,
  4. positive strand in the positive direction is SuccessablesXbox++.bas, looking for 3'-GTTGGCATGGCAAC-5', 0,
  5. complement, negative strand, negative direction is SuccessablesXboxc--.bas, looking for 3'-CAACCGTACCGTTG-5', 0,
  6. complement, negative strand, positive direction is SuccessablesXboxc-+.bas, looking for 3'-CAACCGTACCGTTG-5', 0,
  7. complement, positive strand, negative direction is SuccessablesXboxc+-.bas, looking for 3'-CAACCGTACCGTTG-5', 0,
  8. complement, positive strand, positive direction is SuccessablesXboxc++.bas, looking for 3'-CAACCGTACCGTTG-5', 0,
  9. inverse complement, negative strand, negative direction is SuccessablesXboxci--.bas, looking for 3'-GTTGCCATGCCAAC-5', 0,
  10. inverse complement, negative strand, positive direction is SuccessablesXboxci-+.bas, looking for 3'-GTTGCCATGCCAAC-5', 0,
  11. inverse complement, positive strand, negative direction is SuccessablesXboxci+-.bas, looking for 3'-GTTGCCATGCCAAC-5', 0,
  12. inverse complement, positive strand, positive direction is SuccessablesXboxci++.bas, looking for 3'-GTTGCCATGCCAAC-5', 0,
  13. inverse, negative strand, negative direction, is SuccessablesXboxi--.bas, looking for 3'-CAACGGTACGGTTG-5', 0,
  14. inverse, negative strand, positive direction, is SuccessablesXboxi-+.bas, looking for 3'-CAACGGTACGGTTG-5', 0,
  15. inverse, positive strand, negative direction, is SuccessablesXboxi+-.bas, looking for 3'-CAACGGTACGGTTG-5', 0,
  16. inverse, positive strand, positive direction, is SuccessablesXboxi++.bas, looking for 3'-CAACGGTACGGTTG-5', 0.

X-box samplings

Copying a responsive elements consensus sequence GTCCTCAT 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 GT(A/C/T)N(C/T)(C/T)AT(A/G)(A/G)NAAC (starting with SuccessablesX-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 GT(A/C/T)N(C/T)(C/T)AT(A/G)(A/G)NAAC, 0.
  2. positive strand, negative direction, looking for GT(A/C/T)N(C/T)(C/T)AT(A/G)(A/G)NAAC, 0.
  3. positive strand, positive direction, looking for GT(A/C/T)N(C/T)(C/T)AT(A/G)(A/G)NAAC, 0.
  4. negative strand, positive direction, looking for GT(A/C/T)N(C/T)(C/T)AT(A/G)(A/G)NAAC, 0.
  5. complement, negative strand, negative direction, looking for CA(A/G/T)N(A/G)(A/G)TA(C/T)(C/T)NTTG, 0.
  6. complement, positive strand, negative direction, looking for CA(A/G/T)N(A/G)(A/G)TA(C/T)(C/T)NTTG, 0.
  7. complement, positive strand, positive direction, looking for CA(A/G/T)N(A/G)(A/G)TA(C/T)(C/T)NTTG, 0.
  8. complement, negative strand, positive direction, looking for CA(A/G/T)N(A/G)(A/G)TA(C/T)(C/T)NTTG, 0.
  9. inverse complement, negative strand, negative direction, looking for GTTN(C/T)(C/T)AT(A/G)(A/G)N(A/G/T)AC, 0.
  10. inverse complement, positive strand, negative direction, looking for GTTN(C/T)(C/T)AT(A/G)(A/G)N(A/G/T)AC, 0.
  11. inverse complement, positive strand, positive direction, looking for GTTN(C/T)(C/T)AT(A/G)(A/G)N(A/G/T)AC, 0.
  12. inverse complement, negative strand, positive direction, looking for GTTN(C/T)(C/T)AT(A/G)(A/G)N(A/G/T)AC, 0.
  13. inverse negative strand, negative direction, looking for CAAN(A/G)(A/G)TA(C/T)(C/T)N(A/C/T)TG, 0.
  14. inverse positive strand, negative direction, looking for CAAN(A/G)(A/G)TA(C/T)(C/T)N(A/C/T)TG, 0.
  15. inverse positive strand, positive direction, looking for CAAN(A/G)(A/G)TA(C/T)(C/T)N(A/C/T)TG, 0.
  16. inverse negative strand, positive direction, looking for CAAN(A/G)(A/G)TA(C/T)(C/T)N(A/C/T)TG, 0.

Acknowledgements

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

See also

References

  1. ↑ 1.0 1.1 XIAN-YANG ZHANG, NABILA JABRANE-FERRAT, CLEMENT K. ASIEDU, SANJA SAMAC, B. MATIJA PETERLIN, AND MELANIE EHRLICH (November 1993). "The Major Histocompatibility Complex Class II Promoter-Binding Protein RFX (NF-X) Is a Methylated DNA-Binding Protein" (PDF). MOLECULAR AND CELLULAR BIOLOGY. 13 (11): 6810–8. Retrieved 2017-04-05.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 B. Ferstl, T. Zacher, B. Lauer, N. Blagitko-Dorfs, A. Carl and R. Wassmuth (2004). "Allele-specific quantification of HLA-DQB1 gene expression by real-time reverse transcriptase-polymerase chain reaction" (PDF). Genes and Immunity. 5: 405–416. doi:10.1038/sj.gene.6364108. Retrieved 23 November 2018.
  3. ↑ Eduardo Moreno, Maša Lenuzzi, Christian Rödelsperger, Neel Prabh, Hanh Witte, Waltraud Roeseler, Metta Riebesell, Ralf J. Sommer (November/December 2018). "DAF‐19/RFX controls ciliogenesis and influences oxygen‐induced social behaviors in Pristionchus pacificus". Evolution & Development. 20 (6): 233–243. doi:10.1111/ede.12271. Retrieved 9 March 2021. Check date values in: |date= (help)

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