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Re-specification of I-AniI towards mouse g c-locus (X-SCID) 5’- TGAGGAGGTTTCTCTGTAAA -3’ 5’-AAG G A AGG C TTCTCTGTAAC -3’ 5’-AAG GGAGGTTTCTCTGTAAC -3’. WT. SCID. -10A -9A -8G. “2 nd shell” library. 109. 111. 112. 115. … LSG I I SL ED L PDY …. …LSG X I XX ED X PDY…. 160,000.
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Re-specification of I-AniI towards mouse gc-locus (X-SCID) 5’-TGAGGAGGTTTCTCTGTAAA-3’ 5’-AAGGAAGGCTTCTCTGTAAC-3’ 5’-AAGGGAGGTTTCTCTGTAAC-3’ WT SCID -10A -9A -8G “2nd shell” library 109 111 112 115 …LSGIISLEDLPDY… …LSGXIXXEDXPDY… 160,000 loop randomization 24 25 26 27 28 29 …ITKKGKYLTYEL… …ITKNXXXL/V/IR/KYEL… 24,000 4 x 109
Isolating variants which cleave -10A -9A -8G expression/folding catalysis
Catalytic specificity of variants on the K24N/T29R background 1 – GWWI TLYL 10 – GCYL LYYI 2 – ARWV ILWL 11 – GRYL KLIL 4 – GVIY MYIL 17 – GRYL VHLM 8 – GRYV VTWM
Catalytic specificity of variants on the K24N/T29K background 1 – VKWV LLWM 5 – RRWL VLSL 9* – RIWV CYWL 2 – RLAV LRWL 6 – GAYL AKAV 10 – AFHL LRYL 3 – KRWV WRAV 7 – GDWV LRSR 11 – NMWI ARWT 4 – KIYI PKYL 8 – GKFV WLWV Random Ani WT -10-9-8
Catalytic specificity of variants selected against -9G 1 – GVWV WRHF 6 – RVYL LYFL 11 – GIYI LYLL 2 – GIWV LYSL 7 – GFYL LIYL 12 – RIWV CYWL 3 – YAYI IMHL 8 – LPYL ILAL 13 – HEYL RFFL 4 – LRYI CYWL 9 – THTL VYRL 14 – SKWL DLYL WT 5 – GIYL PRFM 10 – HAWL VRAR
Building onto selected clones to target full mSCID site 5’-TGAGGAGGTTTCTCTGTAAA-3’ 5’-AAGGAAGGCTTCTCTGTAAC-3’ 5’-AAGGGAGGTTTCTCTGTAAC-3’ 2.94 x 109 per NK/NR clone
Evaluating specificity interdependencies using fully randomized triplets Varied Position -10 -9 -8
Evaluating interdependencies in clones which cut -10A -9A -8G NR clone#2 – ARWV ILWL NK clone#5 – RRWL VLSL
