mnk, Chk2, DmChk2, Checkpoint kinase 2, maternal nuclear kinase
homolog of mammalian Chk2 - a serine/threonine kinase required required for DNA damage-mediated cell cycle arrest and apoptosis - tRNA processing defects induce replication stress and Chk2-dependent disruption of piRNA transcription
Please see the JBrowse view of Dmel\lok for information on other features
To submit a correction to a gene model please use the Contact FlyBase form
AlphaFold produces a per-residue confidence score (pLDDT) between 0 and 100. Some regions with low pLDDT may be unstructured in isolation.
Gene model reviewed during 5.44
Low-frequency RNA-Seq exon junction(s) not annotated.
Gene model reviewed during 5.52
2.2 (northern blot)
476, 459 (aa); 56, 54 (kD predicted)
Click to get a list of regulatory features (enhancers, TFBS, etc.) and gene disruptions (point mutations, indels, etc.) within or overlapping Dmel\lok using the Feature Mapper tool.
Comment: maternally deposited
Comment: anlage in statu nascendi
Comment: rapidly degraded
Comment: reported as procephalic ectoderm anlage in statu nascendi
Comment: reported as procephalic ectoderm anlage in statu nascendi
Comment: reported as procephalic ectoderm anlage in statu nascendi
Comment: reported as procephalic ectoderm anlage
Comment: reported as procephalic ectoderm anlage
Comment: reported as procephalic ectoderm anlage
Comment: reported as procephalic ectoderm anlage
Comment: reported as procephalic ectoderm primordium
Comment: reported as procephalic ectoderm primordium
Comment: reported as procephalic ectoderm primordium
Comment: reported as procephalic ectoderm primordium
Comment: reported as procephalic ectoderm primordium
Comment: reported as procephalic ectoderm primordium
lok expression in early embryos is diffusely concentrated at the anterior end of the embryo.
lok transcripts are detected strongly in ovaries and in early embryos on northern blots. lok transcripts are detected from very early in oogenesis. They are first observed in region 2 of the germarium in a patchy pattern and in region 3 are localized to a single spot which may be the oocyte. From stage S2, strong staining is observed in the oocyte and weaker expression is seen in the cytoplasm of the nurse cells. By stage S8, the staining is localized to the anterior edge of the oocyte. In early cleavage stage embryos, lok transcri ts are strongly expressed throughout the embryo with a slight anterior-posterior gradient. By stage 3, expression throughout the embryo diminishes but strong staining remains in the pole cells. Expression in the pole cells is sustained during blastoderm and gastrulation stages. Both lok transcripts are expressed in ovaries and embryos. The ratio of the short form to the long form is ~ 100:1 in ovaries and 1~ 5:1 in late embryos.
lok protein is first detected in somatic and germ line cells at stage 3. By the cellular blastoderm stage, protein is no longer observed in the somatic cells. Expression in the pole cells is sustained through gastrulation and is weakly detectable after the pole cells have migrated into the abdominal cavity.
GBrowse - Visual display of RNA-Seq signals
View Dmel\lok in GBrowse 2Please Note FlyBase no longer curates genomic clone accessions so this list may not be complete
Please Note This section lists cDNAs and ESTs that fall within the genomic extent of the gene model, which may include cDNAs and ESTs of genes within introns, or of overlapping genes. Please see GBrowse for alignment of the cDNAs and ESTs to the gene model.
For each fully sequenced cDNA the DGRC maintains various forms of the cDNA (e.g tagged or untagged) in several different host vectors for subsequent cloning and expression in Drosophila and Drosophila cell lines.
polyclonal
Source for identity of: lok CG10895
"lok" may be allelic to "vls".
Haploinsufficient locus (not associated with strong haplolethality or haplosterility).
dsRNA made from templates generated with primers directed against this gene tested in RNAi screen for effects on Kc167 and S2R+ cell morphology.
lok appears to be a transducer of the meiotic checkpoint that is activated by unrepaired double-strand DNA breaks.
Mutants show defects in maintaining genome stability and are highly sensitive to ionizing radiation. Mutation in lok completely blocks DNA damage-induced apoptosis and partially blocks damage-induced cell cycle arrest.
lok encodes a serine/threonine protein kinase.