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Table 1 Transcriptional level of selected genes of Rickettsia rickettsii in salivary glands of ticks exposed to temperature upshift, blood-feeding or both stimuli simultaneously. Microfluidic RT-qPCR fold changes (mean of at least nine biological replicates) with statistically significant differences with respect to control are presented

From: Virulence genes of Rickettsia rickettsii are differentially modulated by either temperature upshift or blood-feeding in tick midgut and salivary glands

  

Temperature upshift

Blood-feeding

Temperature upshift + Blood-feeding

  

Female

Male

Female

Male

Female

Male

Gene ID

Annotation

Fold change

W a (P-value)

Fold change

W (P-value)

Fold change

W (P-value)

Fold change

W (P-value)

Fold change

W (P-value)

Fold change

W (P-value)

A1G_00075

Ankyrin repeat-containing protein

nsb

 

ns

 

ns

 

ns

 

2.95

77 (0.0160)

2.39

74 (0.0415)

A1G_01255

Ankyrin repeat-containing protein

ns

 

ns

 

-1.92

5 (0.0012)

ns

 

ns

 

ns

 

A1G_00615

Preprotein translocase subunit SecB

ns

 

ns

 

-4.17

0 (0.0001)

-1.96

12 (0.0221)

-2.63

10 (0.0122)

-2.17

14 (0.0277)

A1G_01005

Preprotein translocase subunit SecE

1.54

94 (0.0050)

1.79

100 (0.0009)

ns

 

ns

 

1.55

90 (0.0002)

1.73

90 (0.0002)

A1G_04855

Preprotein translocase subunit SecA

ns

 

-1.54

13 (0.0290)

ns

 

ns

 

ns

 

-1.56

4 (0.0013)

A1G_05455

Preprotein translocase subunit SecY

2.94

94 (0.0050)

ns

 

-1.64

5 (0.0012)

ns

 

1.79

75 (0.0242)

ns

 

A1G_02210

Type IV secretion system component virB8 protein

ns

 

ns

 

ns

 

ns

 

2.44

86 (0.0011)

1.96

86 (0.0013)

A1G_06670

Type IV secretion system component virB4 protein precursor

1.69

88 (0.0182)

ns

 

ns

 

ns

 

2.06

84 (0.0021)

1.59

88 (0.0005)

A1G_07055

Ferredoxin

ns

 

ns

 

ns

 

ns

 

1.61

82 (0.0040)

ns

 

A1G_02555

Thioredoxin peroxidase 1

ns

 

1.57

90 (0.0154)

1.74

90 (0.0001)

ns

 

2.32

90 (0.0002)

2.04

90 (0.0002)

A1G_00010

Thioredoxin

ns

 

1.71

97 (0.0021)

ns

 

ns

 

1.99

89 (0.0003)

2.01

90 (0.0002)

A1G_01335

Molecular chaperone DnaK

-1.72

11 (0.0143)

ns

 

-2.22

1 (0.0002)

-1.52

10 (0.0144)

-3.85

0 (0.0002)

-2.44

4 (0.0013)

A1G_01505

Co-chaperone HscB

ns

 

1.84

99 (0.0009)

ns

 

ns

 

ns

 

1.93

89 (0.0003)

A1G_01545

DNA gyrase subunit A

ns

 

ns

 

-2.70

2 (0.0004)

-2.22

14 (0.0332)

-2.08

16 (0.0300)

ns

 

A1G_02785

Site-specific tyrosine recombinase XerD

ns

 

ns

 

-3.23

0 (0.0001)

-2.63

2 (0.0018)

-2.22

3 (0.0007)

-1.79

8 (0.0052)

A1G_05315

Chaperonin GroEL

ns

 

ns

 

-3.45

0 (0.0001)

-2.04

9 (0.0115)

-2.78

6 (0.0021)

-2.44

0 (0.0002)

A1G_07375

DNA-damage-inducible protein J

ns

 

ns

 

-3.13

0 (0.0001)

ns

 

-2.56

3 (0.0007)

ns

 

A1G_07470

DNA mismatch repair protein

ns

 

ns

 

1.64

87 (0.0006)

1.29

76 (0.0332)

ns

 

ns

 

A1G_00295

Cell surface antigen-like protein Sca10

-2.33

3 (0.0031)

-2.22

9 (0.0123)

-3.45

0 (0.0001)

-2.44

0 (0.0009)

-8.33

0 (0.0002)

-5.56

0 (0.0002)

A1G_01440

Cell surface antigen-like protein Sca8

ns

 

ns

 

-4.35

0 (0.0001)

-2.94

0 (0.0009)

-4.00

0 (0.0002)

-3.70

0 (0.0002)

A1G_06915

Cell surface antigen-like protein Sca13

ns

 

ns

 

-3.33

9 (0.0047)

ns

 

ns

 

ns

 

A1G_03790

Cell surface antigen

-1.89

3 (0.0031)

-2.50

5 (0.0034)

ns

 

ns

 

-2.70

0 (0.0002)

-2.50

5 (0.0017)

A1G_06030

Outer membrane protein B (cell surface antigen sca5)

ns

 

ns

 

ns

 

ns

 

1.59

75 (0.0242)

ns

 

A1G_02865

Lysyl-tRNA synthetase

1.80

93 (0.0050)

2.02

92 (0.0099)

ns

 

ns

 

1.55

78 (0.0122)

ns

 

A1G_03300

Leucyl-tRNA synthetase

4.28

96 (0.0036)

2.04

85 (0.0432)

ns

 

ns

 

4.51

90 (0.0002)

2.02

76 (0.0277)

RrIowa_1080

Arp2/3 complex activation protein

-1.92

10 (0.0137)

ns

 

-2.17

0 (0.0001)

-2.22

2 (0.0018)

-4.17

0 (0.0002)

-3.03

5 (0.0017)

  1. a W Wilcoxon test statistic (the sum of the ranks of the observations for controls). Let m and n be the number of observations for controls and treatment, respectively. Then, the P-value for the Wilcoxon rank-sum test is given by the number of rank sums lower than the observed rank sum W divided by m+n choose n. P-values were calculated using the R program (www.r-project.org), function wilcox.test
  2. b ns no significant differences in relation to control; P < 0.05 in multiple comparisons by the False Discovery Rate (FDR) method shown
  3. Controls: unfed ticks at 25 °C (G1) for temperature upshift and combined effects of temperature upshift and blood-feeding; unfed ticks at 35 °C (G2) for blood-feeding