RMgmDB - Rodent Malaria genetically modified Parasites

Summary

RMgm-772
Malaria parasiteP. berghei
Genotype
TaggedGene model (rodent): PBANKA_0314200; Gene model (P.falciparum): PF3D7_0217500; Gene product: calcium-dependent protein kinase 1 (CDPK1; CPK)
Name tag: GFP
Phenotype Asexual bloodstage; Gametocyte/Gamete; Fertilization and ookinete; Oocyst; Sporozoite;
Last modified: 24 November 2013, 13:33
  *RMgm-772
Successful modificationThe parasite was generated by the genetic modification
The mutant contains the following genetic modification(s) Gene tagging
Reference (PubMed-PMID number) Reference 1 (PMID number) : 22817984
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/ResearcherS. Sebastian; O. Billker
Name Group/DepartmentNot applicable
Name InstituteWellcome Trust Sanger Institute
CityHinxton, Cambridge
CountryUK
Name of the mutant parasite
RMgm numberRMgm-772
Principal namecdpk1-gfp
Alternative name
Standardized name
Is the mutant parasite cloned after genetic modificationYes
Phenotype
Asexual blood stageCDPK1-GFP expression in schizonts
Gametocyte/GameteCDPK1-GFP expression in male and female gametocytes
Fertilization and ookineteCDPK1-GFP expression in ookinetes
OocystCDPK1-GFP expression in oocysts
SporozoiteCDPK1-GFP expression in sporozoites
Liver stageNot tested
Additional remarks phenotype

Mutant/mutation
In the mutant the endogeneous cdpk1 gene is C-terminally tagged with gfp

Protein (function)
In malaria parasites, intracellular Ca2+ signals are translated into stage-specific cellular responses by members of a family of Ca2+-dependent protein kinases (CDPKs), which combine an N-terminal kinase domain with a C-terminal, calmodulin-like regulatory domain in the same polypeptide.

Phenotype
Phenotype analyses indicate that CDPK1 is expressed in many life cycle stages. The
C-terminal GFP tag caused no obvious growth defect in blood stages and did not interfere with parasite transmission through Anopheles stephensi mosquitoes.

Additional information
In schizonts, gametocytes, ookinetes, and young oocysts, much of the fluorescence signal emanated from the cell periphery suggesting dual N-terminal acylation may target the kinase to the plasmalemma, as has been demonstrated for CDPK1 in P. falciparum schizonts

Other mutants
RMgm-518: unsuccessful attempts to disrupt cdpk1
RMgm-773: A promoter exchange mutant that expresses CDPK1 under control of the the asexual blood stage specific clag promoter
RMgm-966: A mutant lacking expression of CDPK! (successful disruption of cdpk1!)
RMgm-967: A mutant containing a FRTed ORF of the cdpk1 locus. Analyses of this mutant indicates the lack of an essential role of CDPK1 for liver stage development


  Tagged: Mutant parasite with a tagged gene
Details of the target gene
Gene Model of Rodent Parasite PBANKA_0314200
Gene Model P. falciparum ortholog PF3D7_0217500
Gene productcalcium-dependent protein kinase 1
Gene product: Alternative nameCDPK1; CPK
Details of the genetic modification
Name of the tagGFP
Details of taggingC-terminal
Additional remarks: tagginggfp fused in frame with the open reading frame of the endogenous cdpk1 gene
Commercial source of tag-antibodiesanti-GFP rabbit polyclonal (Invitrogen)
Type of plasmid/constructPlasmid single cross-over
PlasmoGEM (Sanger) construct/vector usedNo
Modified PlasmoGEM construct/vector usedNo
Plasmid/construct map
Plasmid/construct sequence
Restriction sites to linearize plasmid HpaI
Selectable marker used to select the mutant parasitetgdhfr
Promoter of the selectable markerpbdhfr
Selection (positive) procedurepyrimethamine
Selection (negative) procedureNo
Additional remarks genetic modificationFor c-terminal GFP tagging of the the cdpk1 genomic locus, the terminal 1.5 kb of cdpk1 without the stop-codon was PCR amplified using oligonucleotides ol500 and ol501. The fragment was cloned in frame into the ApaI/KpnI sites of the EGFP-tagging vector p277. For transfection, this construct (pSS312) was linearized at a natural HpaI site within the cdpk1 sequence.
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 1atatggtaccgaaggtggagaattatttgagc
Additional information primer 1olOB500; CDPK1 for GFP tagging forward
Sequence Primer 2atatgggcccaaatgttttatggtcacaaattttgtg
Additional information primer 2olOB501; CDPK1 for GFP tagging reverse
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