Malaria parasiteP. berghei
DisruptedGene model (rodent): PBANKA_0409400; Gene model (P.falciparum): PF3D7_0311400; Gene product: protein kinase, putative
Phenotype Oocyst; Sporozoite; Liver stage;
Last modified: 21 December 2011, 15:29
Successful modificationThe parasite was generated by the genetic modification
The mutant contains the following genetic modification(s) Gene disruption
Reference (PubMed-PMID number) Reference 1 (PMID number) : 20951971
MR4 number
Parent parasite used to introduce the genetic modification
Rodent Malaria ParasiteP. berghei
Parent strain/lineP. berghei ANKA
Name parent line/clone P. berghei ANKA 2.34
Other information parent lineP. berghei ANKA 2.34 is a cloned, gametocyte producer line of the ANKA strain (PubMed: PMID: 15137943).
The mutant parasite was generated by
Name PI/ResearcherR. Tewari, O. Billker
Name Group/DepartmentUniversity of Nottingham
Name InstituteUniversity of Nottingham
Name of the mutant parasite
RMgm numberRMgm-520
Principal nameK66
Alternative name
Standardized name
Is the mutant parasite cloned after genetic modificationYes
Asexual blood stageNot different from wild type
Gametocyte/GameteNot different from wild type
Fertilization and ookineteNot different from wild type
OocystOocyst numbers (day12-14) reduced to 50% of wild type
SporozoiteSalivary gland sporozoite numbers reduced to 10% of wild type
Liver stageno transmission by mosquito bite
Additional remarks phenotype

The gene has been targeted for gene deletion using a construct aimed at integration into the genome by double cross-over homologous recombination

The gene has been targeted for disruption in a 'kinome-wide' study for deletion of genes encoding Plasmodium protein kinases (protein kinase-like proteins).

See the paper for additional information on the analysis of the phenotype.

See RMgm-392 for an independen mutant lacking expression of PBANKA_040940. Phenotype analyses of this mutant showed the following characteristics: Reduced ookinete formation; Reduced numbers of oocyst and of midgut-derived sporozoites; Reduced numbers of salivary gland sporozoites; Salivary gland sporozoites showed normal gliding motility, hepatocyte invasion, liver stage development and infectivity to mice.

Disruption of the P. falciparum ortholog, PFC0485w, has been reported by Agarwal, S et al. (2011; J Cell Biochem). In this paper no information on the phenotype of mutants with a disrupted PFC0485w gene is provided.

Disruption of the P. falciparum ortholog has been attempted (Solyakov et al., 2011, Nat Commun, 2:565). After transfection with a KO vector a strong PCR signal diagnostic for gene disruption was observed in transfected populations indicating that this gene is not essential for asexual proliferation. Cloning will however be required to validate this interpretation for this.

  Disrupted: Mutant parasite with a disrupted gene
Details of the target gene
Gene Model of Rodent Parasite PBANKA_0409400
Gene Model P. falciparum ortholog PF3D7_0311400
Gene productprotein kinase, putative
Gene product: Alternative name
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 genePartial
Additional remarks partial/complete disruption partial (3' insertion/deletion disrupting kinase domain)
Selectable marker used to select the mutant parasitetgdhfr
Promoter of the selectable markerpbdhfr
Selection (positive) procedurepyrimethamine
Selection (negative) procedureNo
Additional remarks genetic modification
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
Additional information primer 1primer sequence target region 1a
Additional information primer 2primer sequence target region 1b
Additional information primer 3primer sequence target region 2a
Additional information primer 4primer sequence target region 2b
Sequence Primer 5
Additional information primer 5
Sequence Primer 6
Additional information primer 6