RMgmDB - Rodent Malaria genetically modified Parasites

Summary

RMgm-927
Malaria parasiteP. berghei
Genotype
Transgene
Transgene not Plasmodium: ovalbumin (OVA) epitopes
Promoter: Gene model: Not available; Gene model (P.falciparum): Not available; Gene product: Not available
3'UTR: Gene model: Not available; Gene product: Not available
Phenotype Asexual bloodstage; Sporozoite; Liver stage;
Last modified: 18 August 2013, 12:36
  *RMgm-927
Successful modificationThe parasite was generated by the genetic modification
The mutant contains the following genetic modification(s) Introduction of a transgene
Reference (PubMed-PMID number) Reference 1 (PMID number) : 23897612
MR4 number
Parent parasite used to introduce the genetic modification
Rodent Malaria ParasiteP. berghei
Parent strain/lineP. berghei ANKA
Name parent line/clone Not applicable
Other information parent line
The mutant parasite was generated by
Name PI/ResearcherKimura, K.; Yui, K.
Name Group/DepartmentDivision of Immunology, Department of Molecular Microbiology and Immunology
Name InstituteNagasaki University
CityNagasaki
CountryJapan
Name of the mutant parasite
RMgm numberRMgm-927
Principal namePbA-hsOVA; PbA-gfpOVA
Alternative name
Standardized name
Is the mutant parasite cloned after genetic modificationYes
Phenotype
Asexual blood stagePbA-gfpOVA expressed in the parasitophorous vacuole (membrane) of blood stages.
Gametocyte/GameteNot tested
Fertilization and ookineteNot tested
OocystNot tested
SporozoitePbA-gfpOVA expressed expressed in the cytoplasm of sporozoites.
Liver stagePbA-gfpOVA expressed in the parasitophorous vacuole (membrane) of liver stages.
Additional remarks phenotype

Mutant/mutation
Two mutants have been generated and analysed that express OVA:
1) PbA-hsOVA expresses a recombinant fusion protein containing the N-terminal sequence (aa 1–5) of P. berghei hsp70, an OVA323-339 MHC II epitope, a truncated sequence (aa 201–398) of P. yoelii hsp70, and an OVA257-264 MHC I epitope.
2) PbA-gfpOVA express a protein containing an OVA257-264 MHC I epitope fused to the C-terminus of GFP

These mutants have been generated as described for mutant RMgm-281 but no details are provided for the promoter used to drive transgene expression,  selectable marker, insertion locus etc.

Protein (function)

Phenotype
PbA-gfpOVA expressed in the parasitophorous vacuole (membrane) of blood stages and liver stages. PbA-gfpOVA expressed expressed in the cytoplasm of sporozoites.

Additional information
Evidence is presented that the ovalbumin epitope is presented by infected liver cells in a transporter associated with antigen processing–dependent manner and becomes a target of specific CD8+ T cells (OT-I cells), leading to protection at the liver stage of Plasmodium infection. The interaction between OT-I cells and infected hepatocytes was visualized by intravital imaging using two-photon microscopy. OT-I cells formed clusters around infected hepatocytes, leading to the elimination of the intra-hepatic parasites and subsequent formation of large clusters of OT-I cells in the liver.

Other mutants

 


  Transgene: Mutant parasite expressing a transgene
Type and details of transgene
Is the transgene Plasmodium derived Transgene: not Plasmodium
Transgene nameovalbumin (OVA) epitopes
Details of the genetic modification
Inducable system usedNo
Additional remarks inducable system
Type of plasmid/constructPlasmid 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 parasitetgdhfr
Promoter of the selectable markerpbdhfr
Selection (positive) procedurepyrimethamine
Selection (negative) procedureNo
Additional remarks genetic modificationTwo mutants have been generated and analysed that express OVA:
1) PbA-hsOVA expresses a recombinant fusion protein containing the N-terminal sequence (aa 1–5) of P. berghei hsp70, an OVA323-339 MHC II epitope, a truncated sequence (aa 201–398) of P. yoelii hsp70, and an OVA257-264 MHC I epitope.
2) PbA-gfpOVA express a protein containing an OVA257-264 MHC I epitope fused to the C-terminus of GFP

These mutants have been generated as described for mutant RMgm-281 but no details are provided for the promoter used to drive transgene expression, selectable marker, insertion locus etc.
Additional remarks selection procedure
Other details transgene
Promoter
Gene Model of Parasite Not available
Gene Model P. falciparum ortholog Not available
Gene productNot available
Gene product: Alternative name
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 Not available
Gene productNot available
Gene product: Alternative name
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 / InsertionNot available
Gene Model of Parasite Not available
Gene productNot available
Gene product: Alternative name
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