Table 1

Patient-specific LMO2 cRSSs and sequencing results of recombination vectors in ex vivo recombination substrate assay

VectorPatient-specific cRSSs*
No. TNo. coloniesNo. A§V(D)J recombination pathway, %
Break repair pathway, 4, %**
Heptamer sequenceSpacer length, bpNonamer sequence123#
647_T068/Dδ3 CACAGTA 12 GCAATAATT 193 (∼ 64) 28 78.5 3.5 18 
T121/Dδ3 CACAGCA 12 ACCAGGGAA 60 (∼ 20) 26 31 61.5 
T024/Dδ3 CACACTA 12 ACAGAAATG 12 113 (∼ 9) 110 4.5 11 84.5 
6206/Dδ3 CACATCA 12 TCTCCTACT 14 78 (∼ 6) 76 22 76 
6206/Dδ3inv CACATCA 23 AATTCACCA 12 39 (∼ 3) 38 24 76 
T064/Dδ3inv CACAGTG 23 ACGCTCAAC 103 (∼ 21) 40 10 12.5 72.5 
T064/Dδ3 CACAGTG 12 AAGACAGCC 84 (∼ 28) 27 67 11 22 
TALL104/Dδ3  No cRSS  11 101 (∼ 9) 75 87 
TALL104/Dδ3inv  No cRSS  42 (∼ 8) 41 95 
UPN4395/Dδ3  No cRSS  36 (∼ 12) 36 94 
UPN4395/Dδ3inv  No cRSS  45 (∼ 15) 41 2.5 97.5 
UPN1589/Dδ3  No cRSS  24 (∼ 6) 22 23 77 
UPN1589/Dδ3inv  No cRSS  19 (∼ 5) 19 16 84 
VectorPatient-specific cRSSs*
No. TNo. coloniesNo. A§V(D)J recombination pathway, %
Break repair pathway, 4, %**
Heptamer sequenceSpacer length, bpNonamer sequence123#
647_T068/Dδ3 CACAGTA 12 GCAATAATT 193 (∼ 64) 28 78.5 3.5 18 
T121/Dδ3 CACAGCA 12 ACCAGGGAA 60 (∼ 20) 26 31 61.5 
T024/Dδ3 CACACTA 12 ACAGAAATG 12 113 (∼ 9) 110 4.5 11 84.5 
6206/Dδ3 CACATCA 12 TCTCCTACT 14 78 (∼ 6) 76 22 76 
6206/Dδ3inv CACATCA 23 AATTCACCA 12 39 (∼ 3) 38 24 76 
T064/Dδ3inv CACAGTG 23 ACGCTCAAC 103 (∼ 21) 40 10 12.5 72.5 
T064/Dδ3 CACAGTG 12 AAGACAGCC 84 (∼ 28) 27 67 11 22 
TALL104/Dδ3  No cRSS  11 101 (∼ 9) 75 87 
TALL104/Dδ3inv  No cRSS  42 (∼ 8) 41 95 
UPN4395/Dδ3  No cRSS  36 (∼ 12) 36 94 
UPN4395/Dδ3inv  No cRSS  45 (∼ 15) 41 2.5 97.5 
UPN1589/Dδ3  No cRSS  24 (∼ 6) 22 23 77 
UPN1589/Dδ3inv  No cRSS  19 (∼ 5) 19 16 84 
*

Identified patient-specific cRSSs and the length of their anticipated spacers are indicated; mismatches from the consensus immune RSS (CACAGTG 12/23 ACAAAAACC) are underlined.

Total number of independent transfections.

Total number of clones obtained (average number of colonies per transfection).

§

Total number of clones analyzed (PCR screen and sequencing).

V(D)J-mediated recombination between authentic Dδ3 RSSs and the cRSSs identified near the patient-specific LMO2 breakpoint.

V(D)J-mediated recombination between authentic Dδ3 RSSs and other cRSSs in the cloned LMO2 area.

#

V(D)J-mediated recombination between authentic Dδ3 RSSs and other cRSSs in the core vector.

**

Break repair-mediated recombination (defined as not mediated by V(D)J).