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Toxins produced by various living organisms (bacteria, yeast, scorpions, snakes, spiders and other living organisms) are the main pathogenic factors causing severe diseases and poisoning of humans and animals. To date, recombinant forms of these toxins are widely used as antimicrobial agents, anticancer drugs, vaccines, etc. Various modifications, which in this case can be introduced into such recombinant proteins, can lead to a weakening of the toxic potency of the resulting toxins or, conversely, increase their toxicity. Thus, it is important to publicly discuss the situations and monitor the emergence of such developments.
Protein | Origin | Reference |
---|---|---|
Production | ||
BoNT | Bacteria Clostridium botulinum | [9] |
Killer toxins K1, K28, K1L | Yeast Saccharomyces paradoxus | [10][11][12] |
Killer toxin Kpkt | Yeast Tetrapisispora phaffii | [13][14] |
ppa1, Tppa2, Tce3, Cbi1 | Scorpions of the genus Tityus and Centruroides | [15] |
β/δ agatoxin-1 | Spider Agelena orientalis | [16] |
Purotoxin-1 | Spiders of the genus Geolycosa sp. | [17] |
Azemiopsin, Three-Finger Toxins | Viper Azemipos feae | [18][19] |
MdumPLA2 | Coral snake Micrurus dumerilii | [20] |
APHC3, HCRG21 | Sea anemone Heteractis crispa | [21][22] |
Toxicity assays | ||
C3bot, C3botE174Q, C2IIa | Bacteria Clostridium botulinum | [23][24][25] |
LeTx | Bacteria Bacillus anthracis | [26] |
HlyII | Bacteria Bacillus cereus | [27][28] |
Cry1Ia | Bacteria Bacillus thuringiensis | [29] |
BFT | Bacteria Bacterioides fragilis | [30] |
EGFP-SbB, translocation domain (TD) of the diphtheria toxin |
Bacteria Corynebacterium diphtheriae | [31][32] |
In1B | Bacteria Listeria monocytogenes | [33] |
LcrV | Bacteria Yersinia pestis | [34] |
AtaT2 | Bacteria Escherichia coli | [35] |
Killer toxin Kpkt | Yeast Tetrapisispora phaffii | [36] |
MeICT, KTx | Scorpion Mesobuthus eupeus | [37][38][39] |
Tbo-IT2 | Spider Tibellus oblongus | [40] |
α-conotoxins, α-cobratoxin | Marine snail and snake venom | [41] |
Three-Finger Toxins | Viper Azemipos feae | [42] |
α-neurotoxins | Cobra Naja melanoleuca | [43] |
Hct-S3 | Sea anemone Heteractis crispa | [44] |
Immunology assays | ||
BoNT | Bacteria Clostridium botulinum | [45] |
Beta and epsilon toxins | Bacteria Clostridium perfringens | [46][47] |
Cholera toxin subunit B (CTB) | Bacteria Vibrio cholerae | [48] |
Ancrod, batroxobin, RVV-V | Snakes Calloselasma rhodostoma, Bothrops atrox, Daboia russelii | [49][50] |
Modifications | ||
BoNT/B-MY, C2IN-C3lim | Bacteria Clostridium botulinum | [51][52] |
DT389-YP7, s-DAB-IL-2(V6A), DT2219 | Bacteria Corynebacterium diphtheriae | [53][54][55] |
rPA83m + plant virus spherical particles (SPs) | Bacteria Bacillus anthracis | [56][57][58] |
SElP + Zn | Bacteria Staphylococcus aureus | [59] |
PE38 + AgNP | Bacteria Pseudomonas aeruginosa | [60] |
CTB-KDEL | Bacteria Vibrio cholerae | [61] |
GFP-L2-AgTx2 | Scorpions Mesobuthus eupeus and Orthochirus scrobiculosus | [62] |
LgRec1ALP1 | Spiders of the genus Loxosceles | [63] |
Ms 9a-1 fragments and homologues | Sea anemone Metridium senile | [64] |
Protein | Enzyme | Mechanism of Action | Reference |
---|---|---|---|
Guanylyltransferase TglT from Mycobacterium tuberculosis | Serine protein kinase TakA |
Specifically, phosphorylates the cognate toxin at residue S78, thereby neutralizing toxicity | [69] |
HepT toxin from Shewanella oneidensis | Minimal nucleotidyltransferase (MNT) |
MNT acts as an adenylyltransferase and mediates the transfer of three AMPs to a tyrosine residue next to the RNase domain of HepT |
[70] |
Bacterial GhoT toxin | Endoribonuclease | GhoS is a sequence-specific endoribonuclease that cleaves mRNA encoding GhoT, preventing its translation | [71] |
Hha toxin from Escherichia coli | An oxygen-dependent antitoxin TomB |
Inactivation of the Hha by oxidation with molecular oxygen mediated by the TomB | [72] |
Mycobacterium tuberculosis toxin DarT | DarG—DNA ADP-ribosyl glycohydrolase | DarG could reverse the DNA ADP-ribosylation by DarT | [73] |
PrP | Commercially available subtilisin enzyme, Prionzyme |
Proteolytic inactivation/degradation | [74] |
PrP | Subtilisin 309 and Subtilisin 309-v | Proteolytic inactivation/degradation | [75] |
PrP | Nattokinase (NK, also known as subtilisin NAT) produced by Bacillus subtilis natto | NK is capable of decreasing amyloid structure of recombinant human PrP fibrils |
[76] |
PrP | Keratinase KerA from B. licheniformis PWD-1 |
Proteolytic inactivation/degradation | [77] |