# Gene transcriptions/Boxes/H and ACAs
## Consensus sequences

"The box H/ACA snoRNAs were most recently recognized as a small RNA family by virtue of an ACA trinucleotide located 3 nt upstream of the mature snoRNA 3' end (41). In addition to this ACA box, they have the consensus H box sequence (5'-ANANNA-3') but have no other primary sequence identity. Despite this lack of primary sequence conservation, the H and ACA boxes are embedded in an evolutionarily conserved hairpin-hinge-hairpin-tail core secondary structure with the H box in the single-stranded hinge region and the ACA box in the single-stranded tail (5, 16)."
The "3' end of mature hTR (45) has an ACA trinucleotide 3 nt upstream of its 3' end. In addition, the 3' region of hTR contains a single H box consensus sequence (5'-AGAGGA-3')."
"Comparison with the murine telomerase RNA (mTR) (7) suggests that the snoRNA-like features of hTR are evolutionarily conserved. The mTR 3' end (nt 169 to 397 as numbered in reference 25) has ~76% sequence identity with the corresponding region of hTR (nt 211 to 451) and includes consensus H (5'-ACAGGA-3') and ACA box sequences."
An H box has a consensus sequence of 3'-ACACCA-5'.

## H and ACA boxes in promoters of A1BG

For the Basic programs (starting with SuccessablesHACA.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:
* negative strand in the negative direction (from ZSCAN22 to A1BG) is SuccessablesHACA--.bas, looking for 3'-ACACCA-5', 4, 3'-ACACCA-5', 788, 3'-ACACCA-5', 2659, 3'-ACACCA-5', 3187, 3'-ACACCA-5', 3811,
* negative strand in the positive direction (from ZNF497 to A1BG) is SuccessablesHACA-+.bas, looking for 3'-ACACCA-5', 1, 3'-ACACCA-5', 386,
* positive strand in the negative direction is SuccessablesHACA+-.bas, looking for 3'-ACACCA-5', 2, 3'-ACACCA-5', 883, 3'-ACACCA-5', 2419,
* positive strand in the positive direction is SuccessablesHACA++.bas, looking for 3'-ACACCA-5', 2, 3'-ACACCA-5', 204, 3'-ACACCA-5', 528,
* complement, negative strand, negative direction is SuccessablesHACAc--.bas, looking for 3'-TGTGGT-5', 2, 3'-TGTGGT-5', 883, 3'-TGTGGT-5', 2419,
* complement, negative strand, positive direction is SuccessablesHACAc-+.bas, looking for 3'-TGTGGT-5', 2, 3'-TGTGGT-5', 204, 3'-TGTGGT-5', 528,
* complement, positive strand, negative direction is SuccessablesHACAc+-.bas, looking for 3'-TGTGGT-5', 4, 3'-TGTGGT-5', 788, 3'-TGTGGT-5', 2659, 3'-TGTGGT-5', 3187, 3'-TGTGGT-5', 3811,
* complement, positive strand, positive direction is SuccessablesHACAc++.bas, looking for 3'-TGTGGT-5', 1, 3'-TGTGGT-5', 386,
* inverse complement, negative strand, negative direction is SuccessablesHACAci--.bas, looking for 3'-TGGTGT-5', 1, 3'-TGGTGT-5', 3764,
* inverse complement, negative strand, positive direction is SuccessablesHACAci-+.bas, looking for 3'-TGGTGT-5', 2, 3'-TGGTGT-5', 511, 3'-TGGTGT-5', 530,
* inverse complement, positive strand, negative direction is SuccessablesHACAci+-.bas, looking for 3'-TGGTGT-5', 3, 3'-TGGTGT-5', 608, 3'-TGGTGT-5', 793, 3'-TGGTGT-5', 1477,
* inverse complement, positive strand, positive direction is SuccessablesHACAci++.bas, looking for 3'-TGGTGT-5', 1, 3'-TGGTGT-5', 420,
* inverse, negative strand, negative direction, is SuccessablesHACAi--.bas, looking for 3'-ACCACA-5', 3, 3'-ACCACA-5', 608, 3'-ACCACA-5', 793, 3'-ACCACA-5', 1477,
* inverse, negative strand, positive direction, is SuccessablesHACAi-+.bas, looking for 3'-ACCACA-5', 1, 3'-ACCACA-5', 420,
* inverse, positive strand, negative direction, is SuccessablesHACAi+-.bas, looking for 3'-ACCACA-5', 1, 3'-ACCACA-5', 3764,
* inverse, positive strand, positive direction, is SuccessablesHACAi++.bas, looking for 3'-ACCACA-5', 2, 3'-ACCACA-5', 511, 3'-ACCACA-5', 530.