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Table 4 Major immunity genes in M. domestica and G. pallidipes: The immune genes described for the model insect, Drosophila melanogaster and the African malaria mosquito, Anopheles gambiae were obtained from the ImmunoDB [161]. The pathway for the putative immune-related proteins in G. pallidipes and M. domestica were verified by BLASTp searches at the Insect Innate Immunity Database (IIID) (≤10−6; bit score > 75) [164]. The pathways shown in this table have been reviewed by Kingsolver et al. [174]

From: Coevolution of hytrosaviruses and host immune responses

Description of the functions and pathways of immune-related proteins in Drosophila melanogaster

Numbers of homologs

Immune function

Key pathway

Protein name/sub-family

D. melanogaster

An. gambiae

M. domestica

G. pallidipes

Pathogen recognition

Lectin

Calcium-dependent (C-type) lectins (CTLs)

34

25

37

17

Phagocytic

Down Syndrome cell adhesion molecule-1 (Dscam1)

1

1

3

1

Pathogen pattern-recognition receptor Eater (Eater)

1

1

–

1

Thioester-containing proteins (TEPs)

10

13

22

7

Signaling

Toll

Spätzle-like proteins (Spätzle)

6

6

4

7

Toll receptors (Tolls)

9

10

7

6

MyD88

1

1

1

1

Tube

1

1

1

1

Pelle

1

1

1

1

TNF-receptor-associated factor-like (TRAF)

1

1

1

2

Cactus

1

1

1

2

Dorsal

2

–

1

8

Signaling

Imd

Immune deficiency (Imd)

1

1

1

–

TGF-beta activated kinase 1 (Tak1)

1

1

1

1

Kenny

1

1

–

1

Inhibitor of nuclear factor kB kinase β (IKKb/ird5)

1

1

1

1

Fas-associated death domain (FADD)

1

1

1

1

Poor Imd response upon knock-in (PIRK)

1

–

1

–

Caspar (Casp)

1

1

1

1

TAK1-associated binding protein 2 (Tab2)

1

1

1

1

Relish (Rel)

1

2

1

2

Signaling

JAK/STAT

Domeless

1

1

–

1

Janus kinase (Hopscotch)

1

1

1

1

Signal transducer and activator of transcription (Stat92E)

1

2

1

2

Signaling

JNK

Jun kinase (JNK)/basket

1

1

1

1

Dual-specificity MAPK hemipterous (hep)

1

1

1

1

Jun-related antigen (Jra/Jun)

1

1

–

2

Effectors

AMP

Antimicrobial peptides (AMPs)

21

11

21

4

Lysozyme

17

8

29

5

Nitric oxide synthase (NOS)

1

1

1

1

Modulators

Exocytic

CLIP-Domain Serine Proteases (CLIPs)

47

55

132

72

Proteolytic

Serine protease inhibitors (serpins)

29

21

35

14

Melanization or Encapsulation

Humoral

Prophenoloxidase (PPO)

3

9

25

8

RNAi response

Small RNA Regulatory Pathways (SRRPs)

Argonaute (Ago)

3

3

2

3

Armitage (Armi)

1

1

1

1

Aubergine (Aub)

1

1

1

1

Dicer (Dcr)

2

2

2

1

Drosha

1

1

1

1

Loquacious (Loqs)

1

1

2

1

Partner of Drosha (Pasha)

1

1

–

1

P-element induced wimpy testis (Piwi)

1

1

1

1

R2D2

1

1

1

2

Spindle-E (Spn-E) or Homeless

1

1

2

1

Tudor staphylococcal nuclease (Tudor-SN)

1

1

1

1