Difference between revisions of "Part:BBa K5184032"
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<partinfo>BBa_K5184032 short</partinfo> | <partinfo>BBa_K5184032 short</partinfo> | ||
− | In order to eliminate | + | In order to eliminate spider mites, spider venom peptide Cs1A is incorporated in our project to broaden the spectrum of molecular targets of venom peptides. Cs1a is a small cysteine-rich venom peptide derived from ''Calommmata signata''. Utilized as predatory toxin in nature, it carries the ability to cause paralysis and death in susceptible subjects by interfering with voltage-gated calcium channels. Given CaV channels' roles in neurotransmitter release and neural impulse relay, Cs1A serves as an effective pesticide. |
− | + | ===Sequences=== | |
− | === | + | |
− | + | ||
<!-- --> | <!-- --> | ||
<span class='h3bb'>Sequence and Features</span> | <span class='h3bb'>Sequence and Features</span> | ||
<partinfo>BBa_K5184032 SequenceAndFeatures</partinfo> | <partinfo>BBa_K5184032 SequenceAndFeatures</partinfo> | ||
+ | |||
+ | ===Usage and Biology=== | ||
+ | Cs1A is a 32aa long peptide containing 6 cysteine residues arranged to create a cysteine framework of C1xxxC2xxxC3C4xxxC5xxxC6, forming cysteine cross bridges between C1C3, or C1C4, and between C2C5 or C2C6 [Fig1A]. | ||
+ | |||
+ | <center><html><img src="https://static.igem.wiki/teams/5184/parts/cs1a-structure.webp" width="600"/></html></center> | ||
+ | <center><b>Fig1: (A) Cysteine cross-bridge structure in Cs1A B. Secondary structure of Cs1A, by structural prediction results from AlphaFold. The cyestine residues are colored orange, displaying their side chains and the rest of the peptide in white</b></center> | ||
+ | |||
+ | Paralysis and mortal effects of susceptible subjects are achieved via Cs1A inhibition on both high-voltage-activated (HVA) Cav channels and low-voltage-activated (LVA) Cav channels of susceptible targets by blocking the channels directly, resulting in impediment of fundamental nervous system responses in neuronal, muscular, and cardiac functions. (Specific site of inhibition depends on the concentration of neurotoxin). | ||
+ | |||
+ | ===Toxicity Verification=== | ||
+ | Cs1Ais synthesized using the vector pTE28a-G1M5-His-SUMO-Cs1A-GNA-His[Fig2B], of which is assembled using GoldenGate cloning and transformed into ''E. coli'' strain DH5ɑ. Colony PCR and sequencing is then carried out to verify the plasmid construct, of which is extracted and transformed into BL21(DE3) strain for expression. After IPTG induction and overnight incubation, the liquid culture is harvested and, after cell lysis, have an SDS-PAGE run. The results suggest that Cs1A had achieved soluble expression. After several unsuccessful purification attempts, the supernatant is treated directly by SUMO protease [Fig2C]. | ||
+ | <center><html><img src="https://static.igem.wiki/teams/5184/parts/cs1a-sumo.webp" width="600"/></html></center> | ||
+ | <center><b>Fig3: (A) G1M5 tag allows secretion of the fusion protein into extracellular milieu (B) Plasmid construct pET28a-G1M5-His-SUMO-Cs1A-GNA-His (C) SDS-PAGE of supernatant and SUMO-treated supernatant, with supernatant of similarly treated supernatant of BL21(DE3) as control</b></center> | ||
+ | The SUMO-digested supernatant's toxicity against ''T. urticae'' females is tested using a spraying method by Professor Huang from SCAU. | ||
+ | Results from the toxicity assay suggests Cs1A to be highly toxic against ''T. urticae'', achieving an fatality of 92.73% within 72 hours. | ||
+ | <center><html><img src="https://static.igem.wiki/teams/5184/parts/cs1a-lethality.webp" width="600"/></html></center> | ||
+ | <center><b>Fig2: (A) ''T. urticae'' in their normal state, before being sprayed with treated supernatant (B) Dead ''T. urticae'' from spraying of treated supernatant (C) Survival plot of ''T. urticae'' being sprayed with supernatant containing Cs1A over 72 hours, CK is similarly processed supernatant of BL21(DE3), acting as a control (D) Lethality data of ''T. urticae'' being sprayed with supernatant over 24, 48, and 72 hours, CK is the similarly processed supernatant of BL21(DE3), acting as a control</b></center> | ||
+ | |||
+ | ==Part Collection== | ||
+ | Our part collection provides a comprehensive list of venom peptides with a diverse range of molecular targets, and all displays satisfactory elimination efficacy during our testings [Fig7A&B]. | ||
+ | <center><html><img src="https://static.igem.wiki/teams/5184/parts/vp-lethality.webp" width="600"/></html></center> | ||
+ | <center><b>Fig7: A. Survival plot of 6 venom peptides against female ''T. urticae'' using a spraying method, CK is induced liquid culture of BL21(DE3), of which acts as control D. Lethality data of 6 venom peptides over 24, 48, and 72 hours, CK is induced liquid culture of BL21(DE3), of which acts as control; data is the means of ± SD of three parallel replicate experiments</b></center> | ||
+ | |||
+ | {|class="wikitable" style="margin:auto" | ||
+ | |+ Our Part Collection | ||
+ | |- | ||
+ | !Current VP!!Venom Name!!Targeted Ion Channel!!New?!!Part Number!!Original Specie | ||
+ | |- | ||
+ | |||PpVP2S||Ca||New||BBa_K5184043||''Phytoseiulus persimilis'' | ||
+ | |- | ||
+ | |||PpVP1S||Ca||New||BBa_K5184042||''Phytoseiulus persimilis'' | ||
+ | |- | ||
+ | |||PpVP1F||Ca||New||BBa_K5184038||''Phytoseiulus persimilis'' | ||
+ | |- | ||
+ | |||rCtx4||Na||||BBa_K5184021||''Phoneutria depilata'' | ||
+ | |- | ||
+ | |✳️||Cs1A||Ca||||BBa_K5184032||''Calommata signata'' | ||
+ | |- | ||
+ | |||HxTx-Hv1h||Ca, K||||BBa_K5184033||''Hadronyche versuta'' | ||
+ | |} | ||
Revision as of 06:29, 2 October 2024
Cs1A
In order to eliminate spider mites, spider venom peptide Cs1A is incorporated in our project to broaden the spectrum of molecular targets of venom peptides. Cs1a is a small cysteine-rich venom peptide derived from Calommmata signata. Utilized as predatory toxin in nature, it carries the ability to cause paralysis and death in susceptible subjects by interfering with voltage-gated calcium channels. Given CaV channels' roles in neurotransmitter release and neural impulse relay, Cs1A serves as an effective pesticide.
Sequences
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21COMPATIBLE WITH RFC[21]
- 23COMPATIBLE WITH RFC[23]
- 25COMPATIBLE WITH RFC[25]
- 1000COMPATIBLE WITH RFC[1000]
Usage and Biology
Cs1A is a 32aa long peptide containing 6 cysteine residues arranged to create a cysteine framework of C1xxxC2xxxC3C4xxxC5xxxC6, forming cysteine cross bridges between C1C3, or C1C4, and between C2C5 or C2C6 [Fig1A].
Paralysis and mortal effects of susceptible subjects are achieved via Cs1A inhibition on both high-voltage-activated (HVA) Cav channels and low-voltage-activated (LVA) Cav channels of susceptible targets by blocking the channels directly, resulting in impediment of fundamental nervous system responses in neuronal, muscular, and cardiac functions. (Specific site of inhibition depends on the concentration of neurotoxin).
Toxicity Verification
Cs1Ais synthesized using the vector pTE28a-G1M5-His-SUMO-Cs1A-GNA-His[Fig2B], of which is assembled using GoldenGate cloning and transformed into E. coli strain DH5ɑ. Colony PCR and sequencing is then carried out to verify the plasmid construct, of which is extracted and transformed into BL21(DE3) strain for expression. After IPTG induction and overnight incubation, the liquid culture is harvested and, after cell lysis, have an SDS-PAGE run. The results suggest that Cs1A had achieved soluble expression. After several unsuccessful purification attempts, the supernatant is treated directly by SUMO protease [Fig2C].
The SUMO-digested supernatant's toxicity against T. urticae females is tested using a spraying method by Professor Huang from SCAU. Results from the toxicity assay suggests Cs1A to be highly toxic against T. urticae, achieving an fatality of 92.73% within 72 hours.
Part Collection
Our part collection provides a comprehensive list of venom peptides with a diverse range of molecular targets, and all displays satisfactory elimination efficacy during our testings [Fig7A&B].
Current VP | Venom Name | Targeted Ion Channel | New? | Part Number | Original Specie |
---|---|---|---|---|---|
PpVP2S | Ca | New | BBa_K5184043 | Phytoseiulus persimilis | |
PpVP1S | Ca | New | BBa_K5184042 | Phytoseiulus persimilis | |
PpVP1F | Ca | New | BBa_K5184038 | Phytoseiulus persimilis | |
rCtx4 | Na | BBa_K5184021 | Phoneutria depilata | ||
✳️ | Cs1A | Ca | BBa_K5184032 | Calommata signata | |
HxTx-Hv1h | Ca, K | BBa_K5184033 | Hadronyche versuta |