Puzzling Low Surface Expression of H-DreI-B7 in IgL-targeted Clones Dre #4Dre #3Dre #2 Dre #3 Dre #2...

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Puzzling Low Surface Expression of H-DreI-B7 in IgL-targeted Clones 10 0 10 1 10 2 10 3 10 4 10 0 10 1 10 2 10 3 10 4 5.69 0.37 1.02 92.9 Dre #4 10 0 10 1 10 2 10 3 10 4 0 20 40 60 80 100 10 0 10 1 10 2 10 3 10 4 10 0 10 1 10 2 10 3 10 4 0.12 11.7 86.6 1.57 10 0 10 1 10 2 10 3 10 4 10 0 10 1 10 2 10 3 10 4 1.41 0.12 0.63 97.8 Dre #3 Dre #2 10 0 10 1 10 2 10 3 10 4 0 20 40 60 80 100 10 0 10 1 10 2 10 3 10 4 0 20 40 60 80 100 Dre #3 Dre #2 IgM-FITC HA-APC dsOligo-Biotin/SAv-PE Cell count (%) unstained dsDre4 dsAni1 Dre #4 DT40 Ψ-/- AID R DT40 TetR WT

Transcript of Puzzling Low Surface Expression of H-DreI-B7 in IgL-targeted Clones Dre #4Dre #3Dre #2 Dre #3 Dre #2...

Page 1: Puzzling Low Surface Expression of H-DreI-B7 in IgL-targeted Clones Dre #4Dre #3Dre #2 Dre #3 Dre #2 IgM-FITC HA-APC dsOligo-Biotin/SAv-PE Cell count (%)

Puzzling Low Surface Expression of H-DreI-B7in IgL-targeted Clones

100 101 102 103 104100

101

102

103

1045.69 0.37

1.0292.9

Dre #4

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100 101 102 103 104100

101

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103

1040.12 11.7

86.61.57

100 101 102 103 104100

101

102

103

1041.41 0.12

0.6397.8

Dre #3Dre #2

100 101 102 103 1040

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100 101 102 103 1040

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Dre #3Dre #2IgM-FITC

HA

-APC

dsOligo-Biotin/SAv-PE

Cell

cou

nt

(%)

unstained dsDre4dsAni1

Dre #4

DT40 Ψ-/- AIDRDT40 TetR WT

Page 2: Puzzling Low Surface Expression of H-DreI-B7 in IgL-targeted Clones Dre #4Dre #3Dre #2 Dre #3 Dre #2 IgM-FITC HA-APC dsOligo-Biotin/SAv-PE Cell count (%)

Hypermutation optimized-DreI-B7/Hypermut2 clones

0 102 103 104 105

0

102

103

104

105 0.18 0.022

0.3299.5

0 102 103 104 105

0

102

103

104

105 6.37 70.8

20.32.49

0 102 103 104 105

0

102

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104

105 2.72 82.7

140.6

0 102 103 104 105

0

102

103

104

105 5.57 89.1

4.330.97

0 102 103 104 105

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103

104

105 0.087 10.3

85.73.99

0 102 103 104 105

0

102

103

104

105 0.83 73

25.50.69

0 102 103 104 105

0

102

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104

105 0.5 36.4

61.71.42

0 102 103 104 105

0

102

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105 0.52 85.7

13.80.071

3D5 3D5

3F4 HDreI 5A8 HDreI 3F5 HDreI 5F8 HDreI

5B8 HDreI 5B12 HDreI

3 weeks in culture:

1 week in culture:I-AniI/Hypermut2 control

Better surface expression, but no integration into rearranged IgL allele

IgM-FITC

HA

-tag

-AP

C

Page 3: Puzzling Low Surface Expression of H-DreI-B7 in IgL-targeted Clones Dre #4Dre #3Dre #2 Dre #3 Dre #2 IgM-FITC HA-APC dsOligo-Biotin/SAv-PE Cell count (%)

0 102 103 104 1050

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DT40 H-DreI C4

HyperDreI 5A8 HyperDreI 5F8 HyperDreI 4E12 HyperDreI 5E6

dsDre4-BT:SAv-PE

Cel

l cou

nt (

% o

f max

imum

)

Good recognition of H-DreI target sequence

Control cells

dsDre4 staining corresponds well to HA-tag staining

unstained dsDre4

Page 4: Puzzling Low Surface Expression of H-DreI-B7 in IgL-targeted Clones Dre #4Dre #3Dre #2 Dre #3 Dre #2 IgM-FITC HA-APC dsOligo-Biotin/SAv-PE Cell count (%)

Flow cytometry analysis of CTLMA2 target

5’ TGAGGAGGTTTCTCTGTAA 3’5’ AGAGGACCTTCATCTGTCA 3’

I-AniI WT:I-AniI CTLMA2:

14.0

6.3

7.8

1.0

1.0

1.0

1.0

1.0

1.0

2.6

2.4

1.3

MFl B10MFl DT40

MFl DT40 = 1.0

Page 5: Puzzling Low Surface Expression of H-DreI-B7 in IgL-targeted Clones Dre #4Dre #3Dre #2 Dre #3 Dre #2 IgM-FITC HA-APC dsOligo-Biotin/SAv-PE Cell count (%)

0 102 103 104 1050

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0 102 103 104 1050

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0 102 103 104 1050

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0 102 103 104 1050

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0 102 103 104 1050

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0 102 103 104 1050

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0 102 103 104 1050

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0 102 103 104 1050

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0 102 103 104 1050

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0 102 103 104 1050

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0 102 103 104 1050

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0 102 103 104 1050

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0 102 103 104 1050

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0 102 103 104 1050

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DT

40B

3 I-

Ani

IB

10 I-

Ani

I3D

5 I-

Ani

IdsAni1 wt dsAni1 +1C+2A

dsOligo-Alexa647

Ce

ll co

un

t (%

of m

axi

mu

m)

Flow cytometry cleavage assay for CTLMA2 target

FACS cleavage assay

0.50

1.00

1.50

2.00

2.50

DT40 B3 B10 3D5

Ale

xa64

7/P

E f

luo

resc

ence

rat

io

dsAni1 wt

dsAni1 +1C+2A