RMgmDB - Rodent Malaria genetically modified Parasites


Malaria parasiteP. berghei
Genetic modification not successful
DisruptedGene model (rodent): PBANKA_0932000; Gene model (P.falciparum): PF3D7_1116000; Gene product: rhoptry neck protein 4 (RON4)
PhenotypeNo phenotype has been described
Last modified: 27 December 2011, 17:39
Successful modificationThe gene/parasite could not be changed/generated by the genetic modification.
The following genetic modifications were attempted Gene disruption
Number of attempts to introduce the genetic modification Unknown
Reference (PubMed-PMID number) Reference 1 (PMID number) : 22177563
Parent parasite used to introduce the genetic modification
Rodent Malaria ParasiteP. berghei
Parent strain/lineP. berghei NK65
Name parent line/clone Not applicable
Other information parent line
Attempts to generate the mutant parasite were performed by
Name PI/ResearcherD. Giovannini; R. Menard
Name Group/DepartmentUnité de Biologie et Génétique du Paludisme
Name InstituteInstitut Pasteur

  Disrupted: Mutant parasite with a disrupted gene
Details of the target gene
Gene Model of Rodent Parasite PBANKA_0932000
Gene Model P. falciparum ortholog PF3D7_1116000
Gene productrhoptry neck protein 4
Gene product: Alternative nameRON4
Details of the genetic modification
Inducable system usedNo
Additional remarks inducable system
Type of plasmid/construct usedPlasmid double cross-over
PlasmoGEM (Sanger) construct/vector usedNo
Modified PlasmoGEM construct/vector usedNo
Plasmid/construct map
Plasmid/construct sequence
Restriction sites to linearize plasmid
Partial or complete disruption of the geneUnknown
Additional remarks partial/complete disruption
Selectable marker used to select the mutant parasitehdhfr
Promoter of the selectable markerunknown
Selection (positive) procedurepyrimethamine
Selection (negative) procedureunknown
Additional remarks genetic modificationIn the paper it is stated: 'To test the role of RON4 in P. berghei, we first attempted to inactivate RON4 in erythrocytic stages by DCO homologous recombination expected to replace RON4 by the hDHFR marker. Multiple experiments failed to select the expected recombinant parasites (data not shown), suggesting that RON4 plays an important role in merozoite invasion of erythrocytes'.
No details are provided on the number of attempts and the primers used to amplify the targeting regions of ron4 for disruption of ron4 by double cross-over recombination.
Additional remarks selection procedure
Primer information: Primers used for amplification of the target sequences  Click to view information
Primer information: 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
Sequence Primer 5
Additional information primer 5
Sequence Primer 6
Additional information primer 6