FB2026_03 , released September 17, 2026
Human Disease Model Report: ovarian carcinoma, RAS-PKRC-related
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General Information
Name
ovarian carcinoma, RAS-PKRC-related
FlyBase ID
FBhh0001585
Disease Ontology Term
Parent Disease
OMIM
Overview

In this ovarian carcinoma (OC) model, tumorigenesis is driven by expression of the Ras85DV12 and aPKCΔN.UAS targeted to the follicle epithelium via GAL4-UAS and restricted to adulthood via a temperature-sensitive GAL4 repressor. Overproliferation, loss of cell polarity, and defective differentiation are observed; metastasis is not observed. OC-bearing flies show significantly accelerated mortality compared with controls; lethality appears to arise from systemic effects of the tumor on the host, termed paraneoplasias. One of the observed changes is overproduction of multiple secreted components of the clotting cascade that trigger hypercoagulation of the hemolymph, followed subsequently by hypocoagulation. Thus this system provides a model for investigation of mechanisms of and possible treatment of tumor-driven coagulopathy.

The constitutively active Ras85D mutation, Ras85DV12, is analogous to one of the most common oncogenic mutations found in human RAS proteins. Variant(s) implicated in human disease tested (as analogous mutation in fly gene): G12V in the fly Ras85D gene (corresponds to G12V in the human KRAS, HRAS and NRAS genes).

[updated Jun. 2024 by FlyBase; FBrf0222196]

Disease Summary Information
Disease Summary: ovarian carcinoma, RAS-PKRC-related
OMIM report
Human gene(s) implicated
Symptoms and phenotype
Genetics
Cellular phenotype and pathology
Molecular information

The RAS proteins are members of a large superfamily of low-molecular-weight GTP-binding proteins. The RAS proteins control signalling pathways that are key regulators of several aspects of normal cell growth and malignant transformation. Three members of the RAS family, HRAS, KRAS and NRAS, are found to be activated by mutation in human tumors. These three members are very closely related, having 85% amino acid sequence identity (Downward, 2003; pubmed:12509763).

The PKC family of serine/threonine kinases are involved in a variety of cellular processes such as proliferation, differentiation and secretion. The PKC family comprises at least eight members grouped by their activation mechanism. Unlike the classical PKC isoenzymes which are calcium-dependent, PRKCI and PRKCZ exhibit kinase activity that is independent of calcium and also independent of diacylglycerol. [Gene Cards, PRKCI and PRKCZ; 2024.06.19]

External links
    Disease synonyms
    Ortholog Information
    Human gene(s) in FlyBase
      Other mammalian ortholog(s) used
        D. melanogaster Gene Information (2)
        Gene Snapshot
        atypical protein kinase C (aPKC) encodes a member of the conserved Par complex and is asymmetrically localized to the apical cortex, where it phosphorylates and thus excludes the basal determinants encoded by mira and numb. It is involved in neuroblast proliferation and self-renewal. [Date last reviewed: 2019-03-07]
        Gene Groups / Pathways
        Comments on ortholog(s)

        High-scoring ortholog of human PRKCI and PRKCZ (1 Drosophila to 2 human).

        Orthologs and Alignments from DRSC
        DIOPT - DRSC Integrative Ortholog Prediction Tool - Click the link below to search for orthologs in Humans
        Gene Snapshot
        Ras oncogene at 85D (Ras85D) encodes a protein that acts downstream of several cell signals, most notably from Receptor Tyrosine Kinases, to regulate tissue growth and development. When abnormally activated it can direct developmental defects and tissue hyperplasia, mimicking aspects of human disease including Rasopathies and cancer, respectively. [Date last reviewed: 2019-03-14]
        Cellular component (GO)
        Gene Groups / Pathways
        Comments on ortholog(s)

        High-scoring ortholog of human genes KRAS, HRAS, and NRAS (many to many; multiple paralogs and orthologs in both species; for these three human genes, Ras85D is the highest-scoring ortholog in Drosophila.

        Orthologs and Alignments from DRSC
        DIOPT - DRSC Integrative Ortholog Prediction Tool - Click the link below to search for orthologs in Humans
        Other Genes Used: Viral, Bacterial, Synthetic (0)
          Summary of Physical Interactions (64 groups)
          RNA-protein
          Interacting group
          Assay
          References
          anti tag coimmunoprecipitation, reverse transcription pcr
          anti bait coimmunoprecipitation, quantitative reverse transcription pcr
          pull down, western blot, electrophoretic mobility shift assay, autoradiography, anti bait coimmunoprecipitation, quantitative reverse transcription pcr
          protein-protein
          Interacting group
          Assay
          References
          enzymatic study, autoradiography
          enzymatic study, autoradiography
          protein kinase assay, autoradiography, anti tag coimmunoprecipitation, western blot, anti bait coimmunoprecipitation, two hybrid, pull down, anti tag western blot, molecular weight estimation by staining
          anti bait coimmunoprecipitation, western blot
          anti bait coimmunoprecipitation, western blot
          pull down, anti tag western blot, western blot, phenotype-based detection assay, fluorescence microscopy, inferred by author
          pull down, autoradiography, anti bait coimmunoprecipitation, western blot, Identification by mass spectrometry
          enzymatic study, Identification by mass spectrometry
          anti bait coimmunoprecipitation, western blot
          anti tag coimmunoprecipitation, western blot
          anti tag coimmunoprecipitation, western blot
          experimental knowledge based, anti bait coimmunoprecipitation, western blot, proximity ligation assay, fluorescence microscopy, anti tag coimmunoprecipitation, peptide massfingerprinting
          anti bait coimmunoprecipitation, western blot, proximity ligation assay, fluorescence microscopy
          anti bait coimmunoprecipitation, western blot, enzymatic study, autoradiography, pull down, anti tag coimmunoprecipitation, anti tag western blot
          anti tag coimmunoprecipitation, anti tag western blot, anti bait coimmunoprecipitation, western blot
          pull down, autoradiography, two hybrid
          pull down, western blot, anti tag coimmunoprecipitation, peptide massfingerprinting, protein kinase assay, autoradiography
          pull down, western blot
          anti tag coimmunoprecipitation, western blot, peptide massfingerprinting
          anti tag coimmunoprecipitation, western blot, anti bait coimmunoprecipitation, pull down, autoradiography, peptide massfingerprinting, two hybrid, anti tag western blot, experimental knowledge based
          pull down, western blot, anti tag western blot
          anti tag coimmunoprecipitation, western blot
          pull down, western blot
          anti tag coimmunoprecipitation, western blot
          anti bait coimmunoprecipitation, anti tag western blot
          anti bait coimmunoprecipitation, western blot
          anti tag coimmunoprecipitation, anti tag western blot, anti bait coimmunoprecipitation
          anti tag coimmunoprecipitation, anti tag western blot
          anti bait coimmunoprecipitation, western blot
          anti tag coimmunoprecipitation, western blot
          anti bait coimmunoprecipitation, western blot
          anti bait coimmunoprecipitation, western blot, enzymatic study, autoradiography, peptide massfingerprinting, pull down
          protein-protein
          Interacting group
          Assay
          References
          anti tag coimmunoprecipitation, peptide massfingerprinting
          anti tag coimmunoprecipitation, peptide massfingerprinting
          pull down, anti tag western blot
          anti tag coimmunoprecipitation, peptide massfingerprinting
          anti tag coimmunoprecipitation, peptide massfingerprinting
          two hybrid, anti tag coimmunoprecipitation, autoradiography
          anti tag coimmunoprecipitation, peptide massfingerprinting
          anti tag coimmunoprecipitation, peptide massfingerprinting
          anti tag coimmunoprecipitation, peptide massfingerprinting
          anti tag coimmunoprecipitation, anti tag western blot
          anti tag coimmunoprecipitation, peptide massfingerprinting
          anti tag coimmunoprecipitation, peptide massfingerprinting
          gtpase assay, autoradiography
          anti tag coimmunoprecipitation, peptide massfingerprinting
          two hybrid, pull down, western blot
          anti tag coimmunoprecipitation, peptide massfingerprinting
          two hybrid, anti tag coimmunoprecipitation, anti tag western blot, pull down
          pull down, anti tag western blot
          anti tag coimmunoprecipitation, peptide massfingerprinting
          anti tag coimmunoprecipitation, peptide massfingerprinting
          anti tag coimmunoprecipitation, peptide massfingerprinting
          anti tag coimmunoprecipitation, peptide massfingerprinting
          anti tag coimmunoprecipitation, peptide massfingerprinting
          anti tag coimmunoprecipitation, peptide massfingerprinting
          anti tag coimmunoprecipitation, peptide massfingerprinting
          anti tag coimmunoprecipitation, anti tag western blot
          anti tag coimmunoprecipitation, Identification by mass spectrometry, pull down, covalent binding, western blot
          Alleles Reported to Model Human Disease (Disease Ontology) (30 alleles)
          Models Based on Experimental Evidence ( 3 )
          Modifiers Based on Experimental Evidence ( 3 )
          Allele
          Disease
          Interaction
          References
          model of  cancer
          is NOT ameliorated by bskK53R.UAS
          Models Based on Experimental Evidence ( 17 )
          Allele
          Disease
          Evidence
          References
          model of  cancer
          Modifiers Based on Experimental Evidence ( 19 )
          Allele
          Disease
          Interaction
          References
          model of  cancer
          is exacerbated by ITPUAS.F
          model of  cancer
          is ameliorated by InRGL00139
          is ameliorated by InRJF01183
          is ameliorated by InRJF01482
          is ameliorated by NetBΔ
          is ameliorated by NetBKK103672
          is ameliorated by unc-5MI04273
          is ameliorated by JraNIG.2275R
          is ameliorated by bskDN.UAS
          is ameliorated by bskHMS00777
          is exacerbated by hepAct.UAS
          is exacerbated by imdUAS.cGa
          is ameliorated by TimpUAS.cPa
          ameliorates  cancer
          model of  kidney cancer
          is ameliorated by Pka-C1B3
          is ameliorated by mTorΔP
          model of  cancer
          is exacerbated by Ptp61FΔ
          is exacerbated by exe1
          is exacerbated by M6W186stop
          is ameliorated by Ptip3804
          is exacerbated by p53UAS.cUa
          is ameliorated by Ilp8MI00727
          is exacerbated by Clbn1Q
          exacerbates  carcinoma
          model of  carcinoma
          is exacerbated by NkapGD11807
          Alleles Representing Disease-Implicated Variants
          Genetic Tools, Stocks and Reagents
          Sources of Stocks
          Contact lab of origin for a reagent not available from a public stock center.
          Bloomington Stock Center Disease Page
          Related mammalian, viral, bacterial, or synthetic transgenes
          Allele
          Transgene
          Publicly Available Stocks
          Selected Drosophila transgenes
          Allele
          Transgene
          Publicly Available Stocks
          RNAi constructs available
          Allele
          Transgene
          Publicly Available Stocks
          Selected Drosophila classical alleles
          Allele
          Allele class
          Mutagen
          Publicly Available Stocks
          loss of function allele
          loss of function allele
          P-element activity
          amorphic allele - genetic evidence
          amorphic allele - molecular evidence
          CRISPR/Cas9
          References (5)