RMgmDB - Rodent Malaria genetically modified Parasites

Summary

RMgm-4921
Malaria parasiteP. berghei
Genotype
Transgene
Transgene not Plasmodium: Ovalbumin (OVA ) fused to HEP17/EXP1
Promoter: Gene model: PBANKA_0926700; Gene model (P.falciparum): PF3D7_1121600; Gene product: exported protein 1 | circumsporozoite-related antigen | parasitophorous vacuole membrane antigen QF 116 (HEP17; EXP1)
3'UTR: Gene model: PBANKA_0926700; Gene product: exported protein 1, putative circumsporozoite-related antigen (HEP17; EXP1)
Replacement locus: Gene model: PBANKA_0306000; Gene product: 6-cysteine protein (230p)
Transgene
Transgene not Plasmodium: GFP
Promoter: Gene model: PBANKA_0711900; Gene model (P.falciparum): PF3D7_0818900; Gene product: heat shock protein 70 (HSP70)
3'UTR: Gene model: PBANKA_0711900; Gene product: heat shock protein 70 (HSP70)
Replacement locus: Gene model: PBANKA_1206800; Gene product: zinc finger (CCCH type) protein, putative (s1)
Phenotype Asexual bloodstage; Liver stage;
Last modified: 20 November 2020, 16:33
  *RMgm-4921
Successful modificationThe parasite was generated by the genetic modification
The mutant contains the following genetic modification(s) Introduction of a transgene, Introduction of a transgene
Reference (PubMed-PMID number) Not published (yet)
MR4 number
Parent parasite used to introduce the genetic modification
Rodent Malaria ParasiteP. berghei
Parent strain/lineP. berghei ANKA
Name parent line/clone RMgm-4920
Other information parent lineOVA::HEP17(hep17)-s1GIMO (RMgm-4920; 3256cl2) expresses a fusion protein of OVA (ovalbumin) and HEP17/EXP1 (PBANKA_092670) under the hep17 promoter and contains the positive/negative selectable marker cassette hdhfr::yfcu in the silent s1 locus (s1-GIMO line).
The mutant parasite was generated by
Name PI/ResearcherFranke-Fayard B, Janse C.J
Name Group/DepartmentLeiden Malaria Research Group, Parasitology
Name InstituteLeiden University Medical Centre
CityLeiden
CountryThe Netherlands
Name of the mutant parasite
RMgm numberRMgm-4921
Principal nameOVA::HEP17(hep17)-GFP(hsp70)
Alternative name3284cl1
Standardized name
Is the mutant parasite cloned after genetic modificationYes
Phenotype
Asexual blood stageOVA and GFP expression in blood stages. Normal blood stage growth/development/multiplication
Gametocyte/GameteNot tested
Fertilization and ookineteNot tested
OocystNot different from wild type
SporozoiteNot different from wild type
Liver stageOVA and GFP expression in liver stages
Normal liver stage development in vitro (normal infection rate of hepatocytes)
Reduced liver load and prolonged prepatent period in mice after intravenously injected with sporozoites
Additional remarks phenotype

Mutant/mutation
The mutant expresses a fusion protein of OVA (ovalbumin) and HEP17/EXP1  (PBANKA_092670) under the hep17 promoter (introduced into the silent p230p locus) and expresses GFP under control of the hsp70 promoter (introduced into the silent s1 locus by GIMO transfection). The mutant does not contain a drug-selectable marker

The mutant has been generated in the the OVA::HEP17(hep17)-s1GIMO line (RMgm-4920; 3256cl2) expresses a fusion protein of OVA (ovalbumin) and HEP17/EXP1  (PBANKA_092670) under the hep17 promoter and contains the positive/negative selectable marker cassette hdhfr::yfcu in the silent s1 locus (s1-GIMO line).

Protein (function)

Phenotype
OVA and GFP expression in blood stages. Normal blood stage growth/development/multiplication. OVA and GFP expression in liver stages Normal liver stage development in vitro (normal infection rate of hepatocytes) Reduced liver load and prolonged prepatent period in mice after intravenously injected with sporozoites (several mutants made in our lab that expresses GFP under control of the hsp70 promoter shows reduced liver stage development in mice). 

Additional information

Other mutants

Click on Ovalbumin for more rodent malaria mutants expressing OVA


  Transgene: Mutant parasite expressing a transgene
Type and details of transgene
Is the transgene Plasmodium derived Transgene: not Plasmodium
Transgene nameOvalbumin (OVA ) fused to HEP17/EXP1
Details of the genetic modification
Inducable system usedNo
Additional remarks inducable system
Type of plasmid/construct(Linear) plasmid double cross-over
PlasmoGEM (Sanger) construct/vector usedNo
Modified PlasmoGEM construct/vector usedNo
Plasmid/construct map
Plasmid/construct sequence
Restriction sites to linearize plasmid
Selectable marker used to select the mutant parasitehdhfr/yfcu
Promoter of the selectable markereef1a
Selection (positive) procedureNo
Selection (negative) procedure5-fluorocytosine (5-FC)
Additional remarks genetic modification
Additional remarks selection procedure
Other details transgene
Promoter
Gene Model of Parasite PBANKA_0926700
Gene Model P. falciparum ortholog PF3D7_1121600
Gene productexported protein 1 | circumsporozoite-related antigen | parasitophorous vacuole membrane antigen QF 116
Gene product: Alternative nameHEP17; EXP1
Primer information details of the primers used for amplification of the promoter sequence  Click to view information
Primer information details of the primers used for amplification of the promoter sequence  Click to hide information
Sequence Primer 1
Additional information primer 1
Sequence Primer 2
Additional information primer 2
3'-UTR
Gene Model of Parasite PBANKA_0926700
Gene productexported protein 1, putative circumsporozoite-related antigen
Gene product: Alternative nameHEP17; EXP1
Primer information details of the primers used for amplification the 3'-UTR sequences  Click to view information
Primer information details of the primers used for amplification the 3'-UTR sequences  Click to hide information
Sequence Primer 1
Additional information primer 1
Sequence Primer 2
Additional information primer 2
Insertion/Replacement locus
Replacement / InsertionReplacement locus
Gene Model of Parasite PBANKA_0306000
Gene product6-cysteine protein
Gene product: Alternative name230p
Primer information details of the primers used for amplification of the target sequences  Click to view information
Primer information details of the primers used for amplification of the target sequences  Click to hide information
Sequence Primer 1
Additional information primer 1
Sequence Primer 2
Additional information primer 2
Sequence Primer 3
Additional information primer 3
Sequence Primer 4
Additional information primer 4

  Transgene: Mutant parasite expressing a transgene
Type and details of transgene
Is the transgene Plasmodium derived Transgene: not Plasmodium
Transgene nameGFP
Details of the genetic modification
Inducable system usedNo
Additional remarks inducable system
Type of plasmid/construct(Linear) plasmid double cross-over
PlasmoGEM (Sanger) construct/vector usedNo
Modified PlasmoGEM construct/vector usedNo
Plasmid/construct map
Plasmid/construct sequence
Restriction sites to linearize plasmid
Selectable marker used to select the mutant parasitehdhfr/yfcu
Promoter of the selectable markereef1a
Selection (positive) procedureNo
Selection (negative) procedure5-fluorocytosine (5-FC)
Additional remarks genetic modificationWe replaced the positive-negative SM in the OVA::hep17(hep17) s1-GIMO genome with a GFP-expression cassette by GIMO transfection, using construct pL2354. To generate pL2354 we first removed the SM cassette from pL1928 using restriction enzyme site KpnI, resulting in plasmid 2023. Then we replaced the s1 5’ gene targeting region of pL2023 and added the GFP expression cassette between the s1 5’ gene and 3’ targeting regions. The s1 5’ gene targeting region was PCR amplified using the primer pairs p5/p6 and ligated using ApaI and KpnI restriction enzyme sites resulting in the intermediate plasmid F261. The GFP-expression cassette, including the 5’ promoter and 3’ UTR from hsp70 (PBANKA_0711900), obtained from plasmid pBC-GFP-hDHFR, 5 was then cloned into F261 using XhoI and PstI restriction enzymes generating plasmid pL2354. The construct was linearized using KasI and SacII restriction enzymes outside of the 5’ and 3’ TRs before transfection. The construct was used to transfect parasites of the OVA::hep17(hep17) s1-GIMO line using standard methods of GIMO-transfection 2,3. Transfected parasites were selected in mice by applying negative selection by providing 5-fluorocytosine (5-FC) in the drinking water of mice. Negative selection results in selection of transgenic parasites where the hdhfr::yfcu SM in the s1 locus of OVA::hep17hep17 s1 GIMO line is replaced by the GFP-expression cassette, resulting in line 3284. Transfected parasites of line 3284 were cloned by limiting dilution, resulting in the GFPhsp70-OVA::hep17hep17, line (line 3284cl1).
Additional remarks selection procedure
Other details transgene
Promoter
Gene Model of Parasite PBANKA_0711900
Gene Model P. falciparum ortholog PF3D7_0818900
Gene productheat shock protein 70
Gene product: Alternative nameHSP70
Primer information details of the primers used for amplification of the promoter sequence  Click to view information
Primer information details of the primers used for amplification of the promoter sequence  Click to hide information
Sequence Primer 1
Additional information primer 1
Sequence Primer 2
Additional information primer 2
3'-UTR
Gene Model of Parasite PBANKA_0711900
Gene productheat shock protein 70
Gene product: Alternative nameHSP70
Primer information details of the primers used for amplification the 3'-UTR sequences  Click to view information
Primer information details of the primers used for amplification the 3'-UTR sequences  Click to hide information
Sequence Primer 1
Additional information primer 1
Sequence Primer 2
Additional information primer 2
Insertion/Replacement locus
Replacement / InsertionReplacement locus
Gene Model of Parasite PBANKA_1206800
Gene productzinc finger (CCCH type) protein, putative
Gene product: Alternative names1
Primer information details of the primers used for amplification of the target sequences  Click to view information
Primer information details of the primers used for amplification of the target sequences  Click to hide information
Sequence Primer 1
Additional information primer 1
Sequence Primer 2
Additional information primer 2
Sequence Primer 3
Additional information primer 3
Sequence Primer 4
Additional information primer 4