Biomod/2011/Caltech/DeoxyriboNucleicAwesome/Sequence Design

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|style="border-style: solid; background-color:#f9f9f9; border-color: #aaaaaa; border-width: 0"| TATCTCCTTTCTATT
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|style="border-style: solid; background-color:#f9f9f9; border-color: #aaaaaa; border-width: 0 0 0 1px"| AATAGAAAGGAGATA
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==List of Strands==
==List of Strands==
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Revision as of 20:08, 30 June 2011

Image:DeoxyriboNucleicAwesomeHeader.jpg

Friday, November 28, 2014

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Sequence Design

Contents

Design Process

After having designed our mechanism at the domain level, we needed to fill in our domains with actual sequences. To start, we picked specific lengths for each of our domains. We decided to stick with the general precedent that toeholds be 6 nucleotides in length, then decided that any domain that was part of a probe be 20 nucleotides in length, as this length is both not wastefully long and long enough to ensure that no spontaneous dissociation would occur. We then decided that any domain longer than a toehold, but not part of the probe system should be 15 base pairs in length, as this would not spontaneously dissociate, but could be easily strand displaced.

After these numbers were decided, we consulted a list of 20 nucleotide sequences that are known to be relatively inert and chose sequences from this list to fill in our 20 and 15 nucleotide domains. We used NUPACK and a little trial and error to find our 7 necessary relatively inert toeholds. We then ran a number of simulations in NUPACK to check for unwanted secondary structures and interactions in our designed sequences.

List of Domains

Probe Domains

The length of these sequences is 20 nucleotides.

Domain Name Sequence (5' → 3') Complement Sequence (5' → 3')
Ptr1 CCAACTCAACCCATTTCATC GATGAAATGGGTTGAGTTGG
Ptr2 TACATACACCAACCTCCACC GGTGGAGGTTGGTGTATGTA
lp TTTTTTTTTTTTTTTTTTTTTTTTTTT AAAAAAAAAAAAAAAAAAAAAAAAAAA
upca ACCTTACCTCTCCCTAACTT AAGTTAGGGAGAGGTAAGGT
upcg ACTAACTCCTACCCACACCT AGGTGTGGGTAGGAGTTAGT
Pwg CCTCTTTCTTATCACTTCAA TTGAAGTGATAAGAAAGAGG

† The lp domain is 27 nucleotides long.


Toehold Domains

The length of these sequences is 7 nucleotides.

Domain Name Sequence (5' → 3') Complement Sequence (5' → 3')
a1 CTCCTC GAGGAG
a2 ATCCAC GTGGAT
a2' ATCC GGAT
z AAAAAA TTTTTT
l CCATTC GAATGG
u ACACAC GTGTGT
wi GGTAAG CTTACC
cgi ATGTTG CAACAT
cgd AGATGA TCATCT
wgd AGATGA TCATCT

† The a2' domain is a subset of the a2 domain and is 4 nucleotides long.
‡ Toeholds cgd and wgd are the same. This does not change the function of our system because they are never used in the same solution together.

Other Domains

The length of these sequences is 15 nucleotides.

Domain Name Sequence (5' → 3') Complement Sequence (5' → 3')
b CCTCAAAACTTATCC GGATAAGTTTTGAGG
x TATCTCCTTTCTATT AATAGAAAGGAGATA


List of Strands

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