Table 2 Proteins identified by MALDI-TOF/TOF MS

From: Proteomic analysis of heat stress resistance of cucumber leaves when grafted onto Momordica rootstock

Spot no.a

Protein name

NCBI accession no.

Protein score

Covb (%)

Peptide count

kDa/pI

Fold changec

Theoretical

Experimental

Cs-28 °C/Cs-28 °C

Mc-28 °C/Cs-28 °C

Cs-42 °C/Cs-28 °C

Mc-42 °C/Cs-42 °C

Photosynthesis (33)

 4

RuBisCO large subunit-binding protein subunit alpha

gi|449456032

732

63%

30

61.40/5.06

66.01/4.85

1.00

0.87

2.13

0.77

 10

Rubisco large subunit-binding protein subunit beta, chloroplastic

gi|449452644

1,120

59%

29

64.75/5.86

66.05/5.33

1.00

0.40

2.00

0.37

 15

Peptidyl-prolyl cis-trans isomerase CYP38, chloroplastic

gi|449446650

586

63%

22

48.85/5.02

46.50/4.81

1.00

1.01

1.53

0.72

 21

Ribulose bisphosphate carboxylase/oxygenase activase, chloroplastic

gi|449441384

707

54%

19

51.77/5.58

53.25/5.20

1.00

1.37

1.55

0.85

 23

Ribulose bisphosphate carboxylase/oxygenase activase, chloroplastic

gi|449441384

761

58%

22

51.77/5.58

54.00/5.14

1.00

2.35

2.37

0.85

 25

Sedoheptulose-1,7-bisphosphatase, chloroplastic

gi|229597543

602

61%

25

42.08/5.96

41.50/5.15

1.00

0.93

0.62

0.80

 26

Oxygen-evolving enhancer protein 1

gi|700193260

445

63%

17

34.94/6.24

35.33/5.13

1.00

1.98

1.06

1.38

 27

Oxygen-evolving enhancer protein 1

gi|700193260

600

56%

16

34.94/6.24

35.75/5.24

1.00

1.94

0.96

1.29

 28

Oxygen-evolving enhancer protein 1

gi|700193260

971

63%

18

34.94/6.24

35.50/5.36

1.00

1.02

0.56

1.79

 35

Triosephosphate isomerase, chloroplastic

gi|449458564

657

58%

19

32.72/7.01

30.75/5.73

1.00

0.73

1.54

0.68

 36d

Ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit, partial (chloroplast)

gi|545698970 AFH05588

302 304

50% 54%

77

20.29/6.58 18.80/5.92

16.00/5.41

1.00

0.74

0.39

1.37

 37d

Ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit, partial (chloroplast)

gi|545698970 AFH05590

280 282

21% 27%

5 5

20.29/6.58 18.10/5.50

15.50/5.23

1.00

0.47

0.26

1.52

 41d

Ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit, partial (chloroplast)

gi|108951132

142

19% 41%

7 2

51.13/5.91 53.40/6.07

13.33/4.99

1.00

0.94

0.00

+∞

CCD31477

140

        

 43

Oxygen-evolving enhancer protein 2, chloroplastic

gi|449460024

383

57%

15

28.12/8.61

17.00/6.26

1.00

0.88

0.69

0.66

 44

Ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit, partial (chloroplast)

gi|111182702

411

50%

19

51.46/6.00

37.25/6.59

1.00

0.70

0.37

1.03

 48

Thylakoid lumenal 29 kDa protein, chloroplastic

gi|449436992

538

49%

19

40.25/7.66

30.40/6.94

1.00

3.44

1.32

1.22

 51

Oxygen-evolving enhancer protein 2, chloroplastic

gi|449460024

396

61%

13

28.12/8.61

11.50/5.23

1.00

0.89

0.69

0.46

 52

Ribulose bisphosphate carboxylase large chain, partial

gi|659133948

358

34%

10

30.15/6.23

9.75/5.24

1.00

1.55

0.44

1.78

 53

Ribulose 1,5-bisphosphate carboxylase/oxygenase large Subunit (plastid)

gi|590000423

309

28%

14

52.61/6.00

9.50/5.11

1.00

0.93

0.32

1.67

 54

Ribulose bisphosphate carboxylase large chain, partial

gi|659133948

224

35%

11

30.15/6.23

9.25/4.99

1.00

0.94

0.43

1.26

 55d

Ribulose-1,5-bisphosphate carboxylase/oxygenase large Subunit, partial (chloroplast)

gi|111182716 CCD31477

170 177

19% 56%

10 4

52.20/6.00 5.34/6.07

10.25/4.68

1.00

0.82

0.26

1.69

 56

Plastocyanin A, chloroplast

gi|700204935

260

41%

4

17.01/4.92

8.00/4.41

1.00

1.96

0.87

0.46

 60

Beta-form rubisco activase

gi|700195391

568

53%

18

48.29/8.19

48.25/5.53

1.00

1.57

1.59

0.99

 62

Ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit, partial (chloroplast)

gi|111182702

497

51%

25

51.46/6.00

40.75/6.95

1.00

16.53

1.90

1.16

 63

Ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit, partial (chloroplast)

gi|111182702

753

51%

22

51.46/6.00

39.25/6.97

1.00

14.48

1.32

3.62

 64

Ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit, partial (chloroplast)

gi|111182702

676

45%

22

51.46/6.00

34.00/6.35

1.00

0.91

0.65

1.07

 66

Ribulose bisphosphate carboxylase small chain, chloroplastic

gi|449434620

456

57%

14

20.69/8.24

8.75/5.73

1.00

2.68

1.31

1.27

 67

Ribulose bisphosphate carboxylase small chain, chloroplastic

gi|449434620

405

55%

13

20.69/8.24

7.25/5.40

1.00

0.97

0.34

1.96

 70

Beta-form rubisco activase

gi|700195391

723

63%

23

48.29/8.19

47.25/5.81

1.00

1.52

1.55

1.05

 71

Ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit, partial (chloroplast)

gi|111182702

756

42%

21

51.46/6.00

34.50/6.46

1.00

0.81

0.65

0.99

 72

Ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit, partial (chloroplast)

gi|111182702

586

42%

21

51.46/6.00

34.25/6.52

1.00

0.77

0.63

1.31

 75

Ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit, partial (chloroplast)

gi|111182702

502

49%

24

51.46/6.00

35.00/6.25

1.00

0.56

0.87

0.79

 77

plastocyanin A, chloroplast

gi|700204935

410

39%

3

17.01/4.92

9.5/4.45

1.00

0.88

0.65

0.77

Energy and metabolism (14)

 8

ATP synthase CF1 beta subunit (plastid)

gi|590000422

904

69%

28

53.81/5.11

59.20/5.19

1.00

1.52

1.17

1.11

 9

ATP synthase subunit beta, mitochondrial-like

gi|449465916

1,020

73%

30

60.07/5.90

58.98/5.34

1.00

1.17

1.34

0.51

 13

Transketolase, chloroplastic

gi|351735634

197

45%

27

80.57/6.00

96.50/5.75

1.00

2.18

2.00

0.69

 14

Transketolase, chloroplastic

gi|351735634

453

54%

32

80.57/6.00

95.17/5.81

1.00

1.67

1.40

0.61

 18d

ACT domain-containing protein ACR11

gi|449439743 XP_022153437

221 213

35% 21%

9 8

31.96/5.53 31.97/5.71

35.00/4.72

1.00

2.42

3.05

0.38

 31

Fructose-bisphosphate aldolase 1, chloroplastic

gi|449464838

455

64%

21

42.87/6.38

39.50/5.72

1.00

1.56

1.30

1.44

 45

Fructose-bisphosphate aldolase, cytoplasmic isozyme 1

gi|449444016

708

62%

19

43.08/6.19

42.00/6.26

1.00

0.42

1.48

0.42

 50

Nucleoside diphosphate kinase

gi|659074723

308

42%

7

16.40/6.30

8.40/6.41

1.00

1.06

0.56

3.22

 57

Malate dehydrogenase, mitochondrial

gi|700198438

478

54%

13

36.18/8.52

38.44/6.25

1.00

0.33

0.87

0.71

 58

Fructose-bisphosphate aldolase 1, chloroplastic

gi|449464838

254

44%

13

42.87/6.38

39.75/5.81

1.00

1.19

2.43

0.54

 59

Fructose-bisphosphate aldolase 1, chloroplastic

gi|449464838

340

60%

19

42.87/6.38

39.75/5.88

1.00

0.54

1.21

0.86

 61

S-adenosylmethionine synthase 2

gi|449472806

764

80%

24

43.20/5.35

53.5/5.61

1.00

0.48

0.54

0.69

 65

Nucleoside diphosphate kinase

gi|700198251

152

43%

9

25.96/9.18

11.75/6.75

1.00

1.56

1.05

1.52

 73

Enolase isoform X1

gi|449451102

421

58%

18

47.71/5.48

62.50/5.72

1.00

1.48

3.20

0.54

Defense response (11)

 5

Abscisic stress ripening-like protein

gi|700190659

487

66%

19

31.72/5.02

59.02/4.87

1.00

2.02

0.95

0.72

 6

Abscisic stress ripening-like protein

gi|700190659

621

67%

21

31.72/5.02

59.11/4.89

1.00

11.55

5.03

1.83

 7

Abscisic stress ripening-like protein

gi|700190659

832

72%

21

31.72/5.02

58.00/4.93

1.00

5.86

5.43

0.62

 16

Peroxidase

gi|700198939

589

52%

11

34.28/4.94

40.25/4.78

1.00

0.62

1.11

0.40

 17

Chromoplast-specific carotenoid-associated protein, chromoplast

gi|449434000

682

64%

15

35.22/5.05

36.75/4.77

1.00

2.40

2.90

0.58

 34d

Ascorbate peroxidase

gi|525507192 AGJ72851

662 652

71% 72%

15 14

27.38/5.43 27.41/5.43

32.50/5.78

1.00

1.30

3.03

0.61

 40d

2-Cys peroxiredoxin BAS1, chloroplastic

gi|659084460 XP_022144676

442 442

38% 40%

10 10

30.03/8.32 29.55/7.66

20.75/5.04

1.00

2.30

1.44

0.96

 46

Leghemoglobin reductase

gi|449459772

514

56%

23

53.57/7.68

64.00/6.79

1.00

1.55

3.02

0.93

 49

Peptide methionine sulfoxide reductase A1-like

gi|778690317

333

35%

8

29.89/8.96

26.25/6.73

1.00

2.09

1.38

1.13

 68

Catalase isozyme 3

gi|700192329

585

52%

24

57.01/6.84

59.00/6.94

1.00

6.25

2.07

1.13

 69

Catalase isozyme 1

gi|778697155

638

62%

25

57.05/6.80

57.29/6.96

1.00

4.57

2.58

1.30

Protein and nucleic acid biosynthesis (9)

 3

Protein disulfide-isomerase

gi|700192511

879

72%

35

57.05/4.88

72.07/4.86

1.00

1.68

2.54

0.54

 12

Elongation factor G-2, chloroplastic

gi|449459756

372

46%

29

85.63/5.42

108.25/5.34

1.00

0.32

0.50

1.19

 19

Glycine-rich RNA-binding protein blt801

gi|778656094

484

53%

11

28.46/5.07

33.75/4.69

1.00

0.95

0.61

0.78

 22

30S ribosomal protein S1, chloroplastic

gi|449459770

851

51%

21

45.30/5.34

48.00/5.17

1.00

0.95

1.54

0.60

 24d

Actin-7

gi|449459238 XP_022132857

454 454

63% 63%

18 18

41.68/5.31 41.68/5.31

49.25/5.34

1.00

0.98

0.61

1.24

 30

Protease Do-like 1, chloroplastic isoform X1

gi|449450105

739

50%

18

46.81/7.13

39.50/5.54

1.00

1.56

1.25

1.15

 47

Serine hydroxymethyltransferase

gi|700193477

702

61%

30

57.84/8.12

61.5/6.80

1.00

0.89

3.09

0.97

 74

29 kDa ribonucleoprotein, chloroplastic

gi|449440111

173

47%

9

30.48/5.84

24.33/4.88

1.00

0.36

0.00

 + ∞

76

Glycine dehydrogenase, mitochondrial

gi|449450349

656

47%

35

113.29/6.62

123.25/6.49

1.00

0.54

1.54

0.43

Molecular chaperone (7)

 1

Calreticulin

gi|449454026

418

55%

25

48.36/4.45

62.21/4.40

1.00

2.66

5.13

0.25

 2d

HSP70, chloroplast

gi|700206320 XP_022154567

784 774

51% 50%

35 34

75.35/5.18 75.18/5.26

99.01/4.88

1.00

0.98

1.77

0.40

 11

Luminal-binding protein 5

gi|659074058

776

45%

29

73.43/5.10

84.00/5.31

1.00

0.98

3.25

0.57

 33

20 kDa chaperonin, chloroplastic

gi|449452602

611

65%

17

26.87/7.85

27.50/5.55

1.00

1.05

1.69

0.97

 38

Small heat shock protein, chloroplastic-like isoform X1

gi|778675414

506

51%

10

20.84/5.03

18.67/5.13

0.00

 + ∞

 + ∞

0.11

 39

Small heat shock protein, chloroplastic-like isoform X2

gi|659095978

492

48%

11

23.82/6.36

18.75/5.03

1.00

3.65

4.75

0.62

 42

Cytosolic class II low molecular weight heat shock protein

gi|700200202

347

67%

7

17.48/5.54

11.50/5.58

1.00

0.40

0.72

0.85

Unknown protein (3)

 20

Uncharacterized protein LOC103496938

gi|449442405

534

74%

22

35.16/4.79

38.75/4.95

1.00

1.72

1.41

0.65

 29

Uncharacterized protein LOC101217229

gi|449463844

578

59%

17

37.81/6.22

37.25/5.35

1.00

1.20

1.90

0.56

 32

Fruit protein pKIWI502

gi|449434568

525

53%

12

32.52/6.08

33.50/5.05

1.00

0.96

0.38

1.57

  1. aSpot number corresponding with 2-DE gel as shown in Fig. 3
  2. bPercentage of sequence coverage by matched peptides
  3. cThe values higher than 1.5 or lower than 0.67 indicate significant changes, with each value representing the mean value of three biological replicates
  4. dAccording to the comparison with the two databases (cucumber and momordica), these protein spots might come from momordica in a great extent. The two results of one protein spot were listed