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Table 2 Differences between spontaneous and elective preterm birth in the human placental proteome

From: Human placental proteomics and exon variant studies link AAT/SERPINA1 with spontaneous preterm birth

Spot

Protein

UniProt-KB

Description

Theoretical pI/ MW (kDa)

Detected pI/ MW (kDa)

Ratio

E vs S

Ch

Ba

26

AAT

P01009

α-1-antitrypsin (isoform 1 or 2)

5.37/ 46.71 (5.37/ 44.31)

4.93 60

(− 1.09)

− 1.53

32

AHSG

P02765

α-2-HS-glycoprotein (inactive protein with propeptide)

5.43/ 39.3 (4.53/ 30.2)

4.56 57

(− 1.15)

− 1.77

18

ALB

P02768

Serum albumin (isoform 1)

5.92 69 (5.67/ 66.5)

5.71 66

(1.21)

− 1.52

19

ALB

P02768

Serum albumin (isoform 1)

5.76 66

(1.15)

− 1.51

20

ALB

P02768

Serum albumin (isoform 1)

5.82 66

(1.14)

− 1.57

64

ANXA4

P09525

Annexin A4 (isoform 1)

5.83/ 35.9 (5.84/ 35.8)

5.66 30

− 2.03

− 1.97

83

ANXA5

P08758

Annexin A5

4.93/ 35.9 (4.93/ 35.8)

4.90 18

(1.58)

2.08

40

BASP1

P80723

Brain acid soluble protein 1 (isoform 1)

4.62/ 22.7 (4.62/ 22.6)

4.54 50

− 2.42

− 3.23

81

CFL1

P23528

Cofilin-1

8.22/ 18.5 (8.26/ 18.4)

6.01 19

(− 1.15)

− 2.43

71

CLIC3

O95833

Chloride intracellular channel protein 3

5.99/ 26.6

5.89 26

− 1.75

(− 1.69)

66

CLIC4

Q9Y696

Chloride intracellular channel protein 4

5.45/ 28.8 (5.45/ 28.6)

5.39 26

(1.05)

− 1.56

76

CSH1/2

P0DML2/3

Chorionic somatomammotropin hormone 1/2 (isoform 1)

5.35/ 25.01 (5.33/ 22.31)

5.43 22

3.22

3.14

77

CSH1/2

P0DML2/3

Chorionic somatomammotropin hormone 1/2 (isoform 1)

5.59 22

(2.17)

2.08

86*

CSH1/2

P0DML2/3

Chorionic somatomammotropin hormone 1/2 (isoform 1, fragment)

5.67 15

(2.07)

3.09

65

EFHD1

Q9BUP0

EF-hand domain-containing protein D1 (isoform 1)

5.34/ 26.9

5.22 28

− 2.01

− 2.48

22

ERO1L

Q96HE7

ERO1-like protein α

5.48/ 54.4 (5.37/ 51.9)

5.53 63

− 1.66

− 2.78

16

EZR

P15311

Ezrin

5.94/ 69.4 (5.95/ 69.3)

5.88 82

− 2.01

− 2.69

15

F13A1

P00488

Coagulation factor XIII A chain (inactive protein with propeptide)

5.75/ 83.3 (5.81/ 79.2)

5.74 88

2.09

1.98

70

GSTO1

P78417

Glutathione S-transferase ω-1 (isoform 1)

6.24/ 27.6 (6.23/ 27.4)

5.69 27

(− 1.65)

− 2.02

42

HP

P00738

Haptoglobin (isoform 1 or 2)

 

4.79 44

2.19

(1.47)

52

HSD17B1

P14061

Estradiol 17-β-dehydrogenase 1

5.46/ 34.9 (5.47/ 34.8)

5.46 35

(1.35)

1.64

53

HSD17B1

P14061

Estradiol 17-β-dehydrogenase 1

5.59 35

(1.43)

1.70

17

HSPA5

P11021

78 kDa glucose-regulated protein

5.07/ 72.3 (5.01/ 70.5)

5.01 71

(1.99)

2.78

21

HSP90B1

P14625

Endoplasmin

4.76/ 92.5 (4.73/ 90.2)

5.09 97

(1.88)

1.85

43

KRT19

P08727

Keratin, type I cytoskeletal 19

5.05/ 44.2

4.85 41

(− 1.11)

− 1.74

44

KRT19

P08727

Keratin, type I cytoskeletal 19

4.87 41

(− 1.18)

− 1.76

45

KRT19

P08727

Keratin, type I cytoskeletal 19

4.90 41

(− 1.22)

(− 1.59)

46

KRT19

P08727

Keratin, type I cytoskeletal 19

4.93 41

(− 1.22)

− 1.64

56*

KRT19

P08727

Keratin, type I cytoskeletal 19 (C-terminal fragment)

4.74 37

(− 1.04)

− 1.70

34

LUM

P51884

Lumican

6.16/ 38.4 (6.17/ 36.7)

4.51 53

(1.44)

− 1.81

68

PRDX4

Q13162

Peroxiredoxin-4

5.86/ 30.5 (5.54/ 26.6)

5.61 25

(− 1.22)

− 1.55

75

PRDX6

P30041

Peroxiredoxin-6

6.00/ 25.0 (6.02/ 24.9)

5.82 25

− 1.66

− 1.69

47

SERPINB2

P05120

Plasminogen activator inhibitor 2

5.46/ 46.6

5.51 42

(1.55)

1.96

88

S100A6

P06703

Protein S100-A6

5.32/ 10.2

4.95 10

(− 1.17)

− 2.19

41

VIM

P08670

Vimentin

5.05/ 53.7 (5.05/ 53.5)

4.71 44

(1.05)

− 1.54

29

WARS

P23381

Tryptophan-tRNA ligase (isoform 1 or 2)

5.83/ 53.21 (5.83/ 53.01)

5.83 55

(− 1.02)

1.65

24

–

–

–

–

5.52 56

1.39

2.39

69

–

–

–

–

5.94 29

− 3.92

(− 2.51)

72

–

–

–

–

5.15 25

(− 1.79)

− 2.52

82

–

–

–

–

4.94 19

− 2.49

− 2.39

  1. Spot numbers are according to Additional file: Fig S1. Descriptions and UniProt accession numbers for the identified spots are shown. Spots belonging to the same protein are clustered. Protein fragments are indicated with asterisks. Specific protein isoforms were validated according to spot positions in the gel and the covered protein sequence, as well as isoform-specific peptides obtained by mass spectrometry. Theoretical spot identifications were calculated according to full or mature (in parentheses) protein sequences, whereas detected spot positions in the gel were determined according to selected marker spots. If the identified spot allowed for the presence of several isoforms, theoretical values were indicated for the most common isoform. Ratio shows the change in mean normalized spot volumes between spontaneous (S) and elective (E) preterm birth in basal (Ba) and chorionic (Ch) plates of the placenta. Changes with no significance (p > 0.05) are denoted by parentheses. Spots 24, 69, 72, and 82 were not identified. For more details about protein levels, statistical significance, and protein identification, see Additional file: Tables S2 and S3. Isoelectric point (pI)