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Table 1 List of differentially expressed proteins identified using MALDI-TOF/TOF-MS in magnesium (Mg)-deficient Citrus sinensis leaves

From: Proteomic analysis of Citrus sinensis roots and leaves in response to long-term magnesium-deficiency

Spot no. a

Accession no. b

Protein identity

Organism

MW (kDa)

MP/SC

Score

Ratio c

Carbohydrate and energy metabolism

L118

gi|4206520

Ribulose 1,5-bisphosphate carboxylase, partial

Severinia buxifolia

49.67

23/86

450

0.267

L20

gi|19992

Ribulose bisphosphate carboxylase activase

Nicotiana tabacum

25.91

14/92

418

0.478

L24

gi|290766483

Rubisco activase

Glycine max

52.39

19/90

315

0.051

L26

gi|19992

Ribulose bisphosphate carboxylase activase

N. tabacum

25.91

14/95

398

0.259

L31

gi|19992

Ribulose bisphosphate carboxylase activase

N. tabacum

25.91

15/94

435

0.170

L51

gi|100380

Ribulose-bisphosphate carboxylase activase

 

25.91

13/96

397

0.388

L52

gi|19992

Ribulose-bisphosphate carboxylase activase

N. tabacum

25.91

11/98

264

0.190

L48

gi|326467059

Oxygen evolving enhancer protein 1

Litchi chinensis

35.17

14/96

288

0.020

L115

gi|89475526

Photosynthetic electron transfer-like protein

Panax ginseng

19.64

5/103

93

0.412

L119

gi|158145455

Putative ferredoxin-NADP reductase

Solanum peruvianum

18.02

11/98

111

0.325

L114

gi|77540212

Glyceraldehyde-3-phosphate dehydrogenase B subunit

Glycine max

48.20

13/96

167

0.323

L80

gi|313585890

Phosphoglycerate kinase

Nicotiana benthamiana

50.05

14/93

357

0.239

L93

gi|313585890

Phosphoglycerate kinase

N. benthamiana

50.05

11/99

281

0.346

L94

gi|1161600

Phosphoglycerate kinase

N. tabacum

50.15

20/90

565

0.457

L106

gi|255567325

Carbonic anhydrase, putative

Ricinus communis

35.64

4/106

83

0.295

L44

gi|295687231

Triosephosphate isomerase

Gossypium hirsutum

33.10

7/102

121

0

L108

gi|330252068

Fructose-bisphosphate aldolase, class I

Arabidopsis thaliana

41.78

10/98

138

0.442

L67

gi|332196500

Putative lactoylglutathione lyase, chloroplast

A. thaliana

39.14

17/82

58

0

L81

gi|642352

Malate dehydrogenase (NADP)

Spinacia oleracea

47.46

1/98

23

2.320

L89

gi|255579273

Succinate dehydrogenase, putative

R. communis

68.46

23/87

293

2.438

L104

gi|285309967

Aconitate hydratase 3

Citrus clementina

98.04

30/78

330

3.176

L112

gi|255578100

Dihydrolipoamide succinyltransferase component of 2-oxoglutarate dehydrogenase, putative

R. communis

50.84

9/99

115

2.262

L72

gi|289600010

2-Phospho-D-glycerate hydrolase

Citrus trifoliata

47.76

5/98

449

3.389

L86

gi|332190370

2,3-Bisphosphoglycerate-independent phosphoglycerate mutase 1

A. thaliana

60.54

20/90

314

3.775

L60

gi|20336385

Alpha-amylase

Citrus reticulata

17.05

9/101

220

4.083

L77

gi|7671230

ADP-glucose pyrophosphorylase catalytic subunit

Perilla frutescens

57.44

16/83

63

2.080

L61

gi|56784991

Putative ATP synthase beta subunit

Oryza sativa Japonica Group

45.88

22/88

706

0.280

L65

gi|332191230

ATP synthase gamma chain 2

A. thaliana

42.65

7/102

88

0.101

L33

gi|113952607

ATP synthase CF1 alpha subunit, chloroplastic

C. sinensis

55.45

32/78

781

0.205

L47

gi|122166198

ATP synthase subunit alpha,

chloroplastic

 

55.45

30/80

632

0.218

L40

gi|41350585

Putative adenosine kinase

Populus tremula × Populus alba

24.99

6/104

82

2.174

L105

gi|255571035

Nucleoside diphosphate kinase, putative

R. communis

16.30

3/104

116

3.070

L117

gi|33149683

Alcohol dehydrogenase

Dianthus caryophyllus

41.23

8/101

284

100

Protein metabolism

L79

gi|255540493

Elongation factor tu, putative

Ricinus communis

50.09

20/90

505

0.357

L25

gi|806808

Chaperonin precursor (chloroplast)

Pisum sativum

62.95

13/97

177

100

L71

gi|3098188

Small ribosomal protein 4, partial (chloroplast)

Plagiomnium affine

22.29

12/97

57

24.429

L88

gi|193788982

Ribosomal protein S3

Trifolium subterraneum

24.57

9/100

51

2.067

L109

gi|12802327

Mitochondrial processing peptidase beta subunit

Cucumis melo

58.85

17/91

269

100

L41

gi|332005228

F-box domain-containing protein

A. thaliana

50.19

15/94

57

3.351

L8

gi|31433129

F-box family protein, putative, expressed

O. sativa Japonica Group

34.58

11/98

57

100

L9

gi|334302804

Putative F-box/kelch-repeat protein

 

42.48

16/94

67

100

L62

gi|12324823

Putative RING zinc finger protein

A. thaliana

12.29

11/99

61

21.438

L4

gi|89274062

Cysteine proteinase

Platycodon grandiflorus

50.77

6/101

91

3.780

L6

gi|89274062

Cysteine proteinase

P. grandiflorus

50.77

10/96

63

17.176

L45

gi|255538698

Proteasome subunit alpha type, putative

R. communis

30.35

11/98

249

3.490

L49

gi|332656653

Putative cathepsin B-like cysteine protease

A. thaliana

39.32

8/100

148

100

L58

gi|332656653

Putative cathepsin B-like cysteine protease

A. thaliana

39.32

9/98

156

7.633

L27

gi|9280680

F2E2.12

A. thaliana

12.88

9/99

55

0.476

L98

gi|193848487

Putative skp1 protein

Brachypodium distachyon

18.69

10/100

57

0.442

L75

gi|121489623

Putative glutamine synthetase

P. sativum

39.02

10/99

136

7.333

L91

gi|121489623

Putative glutamine synthetase

P. sativum

39.02

10/100

196

2.087

L102

gi|297843044

S-adenosylmethionine synthetase

Arabidopsis lyrata subsp. lyrata

41.43

18/91

230

100

L113

gi|18150415

Glutathione S-transferase

Allium cepa

23.43

1/96

55

2.873

Stress responses

L50

gi|2274917

Cu/Zn superoxide dismutase

Citrus sinensis

12.78

8/102

259

100

L78

gi|2274917

Cu/Zn superoxide dismutase

C. sinensis

12.78

6/102

127

22.111

L63

gi|221327589

Ascorbate peroxidase 2

Citrus maxima

27.56

18/91

230

3.426

L96

gi|189476292

Ascorbate peroxidase

C. maxima

22.65

10/97

313

100

L97

gi|186920323

Chloroplast Cu/Zn superoxide dismutase

Hevea brasiliensis

6.92

6/80

219

0.410

L74

gi|223543700

Aldo/keto reductase, putative

R. communis

37.98

8/99

103

3.418

L103

gi|255543887

Aldo-keto reductase, putative

R. communis

34.84

5/104

102

7.957

L28

gi|20559

Heat shock protein 70

Petunia x hybrida

70.74

33/77

523

2.595

L39

gi|211906496

Heat shock protein 70

Gossypium hirsutum

71.17

34/76

456

3.219

L46

gi|300265

HSP68 = 68 kda heat-stress DnaK homolog

Lycopersicon peruvianum

62.34

15/94

79

3.960

L59

gi|259123935

CII small heat shock protein 1

Prunus salicina

17.52

6/10

102

314.482

L76

gi|116643152

Stress-related protein

Citrus sinensis

17.59

14/94

310

6.476

L90

gi|116643152

Stress-related protein

Citrus sinensis

17.59

14/95

382

4.825

L116

gi|332661276

Late embryogenesis abundant (LEA) protein

A. thaliana

37.94

12/98

47

0.441

Nucleic acid metabolism

     

L5

gi|89258208

Maturase, partial (mitochondrion)

Nepenthes sp. ‘Kosobe’

67.36

16/94

54

3.741

L17

gi|115466830

Os06g0187000 protein

Oryza sativa Japonica Group

91.71

17/92

56

3.776

L22

gi|4063759

Mutator-like transposase

A. thaliana

80.331

18/92

65

14.059

L73

gi|255560725

Dead box ATP-dependent RNA helicase

R. communis

46.812

27/81

393

2.228

Cell wall and cytoskeleton metabolism

     

L16

gi|56603655

Myosin class 11-1

Adiantum capillus-veneris

173.69

27/82

63

2.339

L21

gi|216296850

UGT1 (UDP-glucosyltransferase)

Pueraria montana var. lobata

52.19

13/97

56

23.600

L107

gi|38260664

Pollen coat oleosin-glycine rich protein

Olimarabidopsis pumila

47.00

12/98

39

100

Cell transport

      

L87

gi|108707728

Mitochondrial import inner membrane translocase subunit Tim17/Tim22/Tim23 family protein, putative

Oryza sativa Japonica Group

18.36

1/96

34

4.384

L110

gi|297793335

ATYKT62

A. lyrata subsp. lyrata

22.64

7/52

51

100

Lipid metabolism

      

L43

gi|108707070

Type I inositol-1,4,5-trisphosphate 5-phosphatase CVP2, putative

Oryza sativa Japonica

54.41

14/94

56

100

L19

gi|255545978

Cytochrome P450, putative

R. communis

77.12

15/95

48

2.320

Other and unknown biological processes

L10

gi|163943829

Ent-kaurene synthase

Luziola fluitans

42.96

13/96

53

100

L66

gi|255547472

4-Nitrophenylphosphatase, putative

R. communis

39.69

17/92

167

0

L29

gi|825532

Orf

Pseudotsuga menziesii

17.00

8/99

51

0.350

L23

gi|2582665

Thi

C. sinensis

37.57

21/89

197

8.333

L15

gi|108711987

Streptomyces cyclase/dehydrase family protein, expressed

Oryza sativa Japonica Group

57.34

15/76

60

2.595

L30

gi|147855631

Hypothetical protein VITISV_019248

Vitis viniferai

35.05

12/98

346

2.365

L64

gi|302810346

Hypothetical protein SELMODRAFT_182694

Selaginella moellendorffii

47.01

9/101

215

0.480

L42

gi|147812626

Hypothetical protein VITISV_007608

Vitis vinifera

27.14

8/101

167

11.185

L18

gi|326530266

Predicted protein

Hordeum vulgare subsp. vulgare

62.53

17/92

59

6.750

L32

gi|296086060

Unamed protein product

V. vinifera

17.29

18/91

234

100

L7

gi|296089720

Unnamed protein product

V. vinifera

27.96

7/85

55

0.160

L92

gi|147821099

Hypothetical protein VITISV_038267

V. vinifera

39.24

11/99

66

3.538

  1. MP/SC: Number of matched peptides/sequence coverage percentage; MW: Theoretical molecular weigh;
  2. a: Spot number corresponds to the 2-DE gel in Figure 3.
  3. b: gi number is from NCBI database of matched protein.
  4. c: Ratio means the ratio of Mg-deficiency to control; 0 means protein spots were only detected in control roots; 100 means protein spots were only detected in the Mg-deficient roots.