Gram-positive Specific Serine protease (grass) encodes a secreted serine protease that is involved downstream of the microbial sensing receptors encoded by GNBP3 and PGRP-SA in the activation of the Toll pathway during the immune response. It functions downstream of the serine protease encoded by modSP and upstream of the enzyme encoded by SPE, which cleaves the product of spz; Belongs to the peptidase S1 family. CLIP subfamily.

Sphinx2, isoform B; Sphinx2 (sphinx2) encodes a protein related to the serine protease homolog, which is strongly expressed in the male accessory gland.

Spheroide (sphe) encodes a serine protein homologue, a serine protease with no catalytic activity.

Modular serine protease non-catalytic chain; Serine protease that plays a key role in innate immunity by activating the Toll pathway in response to infection with Gram-positive bacteria and fungi. During Gram- positive infection, acts downstream of PGRP-SA and upstream of Grass and Spz, and therefore appears to function in a pathway that links detection of Gram-positive lysine-type peptidoglycans to Toll activation. Functions in a separate pathway to the psh-mediated activation of the Toll pathway. Belongs to the peptidase S1 family.

Gram-negative bacteria-binding protein 1; Plays a key role in innate immunity by acting as a pattern recognition receptor for beta-1,3-glucan from fungi and lipopolysaccharide from Gram-negative bacteria. Upon recognition of invading micro-organism-derived products, acts upstream of protease spz processing enzyme SPE to activate the Toll pathway and to induce the expression of antimicrobial peptides drosomycin, cecropin and attacin. Belongs to the insect beta-1,3-glucan binding protein family.

Gram-negative bacteria binding protein 3 (GNBP3) encodes a hemolymphatic protein involved in the sensing of glucan (a fungal cell wall component) upstream of the Toll pathway.

Serine protease persephone; Serine protease that plays a key role in innate immunity in response to Gram-positive bacterial and fungal proteases. Acts as a component of the Toll pathway upstream of protease spz processing enzyme SPE and Tl ligand spz. Nec regulates the cascade by inhibiting psh ; Belongs to the peptidase S1 family. CLIP subfamily.

Peptidoglycan-recognition protein SA; Peptidoglycan-recognition protein that plays a key role in innate immunity by binding to peptidoglycans (PGN) of Gram-positive bacteria and activating the Toll pathway upstream of spz activating enzyme SPE. Has no activity against Gram-negative bacteria and fungi. Shows some partial redundancy with PRPGP-SD in Gram-positive bacteria recognition. May act by forming a complex with GNBP1 that activates the proteolytic cleavage of Spatzle and the subsequent activation of Toll pathway. Binds to diaminopimelic acid-type tetrapeptide PGN (DAP-type PGN) an [...]

Peptidoglycan-recognition protein SD; Peptidoglycan-recognition protein that plays a key role in innate immunity by binding to peptidoglycans (PGN) of Gram-positive bacteria and activating the Toll pathway. Has no activity against on Gram-negative bacteria and fungi. Shows some partial redundancy with PRPGP-SA in Gram-positive bacteria recognition. May act by activating the proteolytic cleavage of Spatzle and the subsequent activation of Toll pathway. Recognizes S.aureus PGN; Belongs to the N-acetylmuramoyl-L-alanine amidase 2 family.