Table 1 Selected examples of differential phosphorylation stoichiometry between drug sensitive (PC9) and resistance (PC9/gef.) lung cancer cell.

From: Large-scale determination of absolute phosphorylation stoichiometries in human cells by motif-targeting quantitative proteomics

Protein

p-site

p-site ratio

Motif

Stoichiometry

Protein ratio

    

PC9

PC9/gef.

Difference

 

HMGA1

T53

ND

CK2

6%

42%

36%

0.3

AP2A1

Y418

ND

EGFR

11%

34%

23%

1.4

CDK1

S39

ND

CK2

1%

33%

32%

0.7

DKC1

S453

2.4

CK2

45%

77%

32%

2.4

PTPN3

S425

2.4

CK2

27%

56%

29%

1.4

KPNA3

S60

2.5

CK2

34%

58%

24%

3.4

CEBPB

T235

2.3

MAPK

41%

62%

21%

1.7

HNRNPK

Y280

ND

EGFR

0%

20%

20%

0.9

MET

T977

ND

MAPK

0%

14%

14%

1.7

SF3A1

S359

3.5

CK2

100%

100%

0%

2

NOP56

S520

5.1

CK2

63%

61%

−2%

2.1

EGFR

Y1197

ND

EGFR

34%

22%

−12%

0.8

HDAC2

S394

0.1

CK2

100%

86%

−14%

1.7

  1. ‘ND’ means that this phosphorylation site was not identified by conventional phosphoproteomic strategy.