FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Human Disease Model Report: cancer, epithelial, LLGL-YAP1-related
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General Information
Name
cancer, epithelial, LLGL-YAP1-related
FlyBase ID
FBhh0000590
Disease Ontology Term
Parent Disease
OMIM
Overview

This model of epithelial cancer uses the Drosophila Scribble polarity complex gene l(2)gl in combination with a transcriptional co-activator regulated by the Hippo signaling pathway, the Drosophila gene yki. The highly conserved Scribble polarity complex plays a key role in determining cell polarity and cell proliferation in epithelial cells. One of the human gene orthologous to Dmel\yki, YAP1, is known to play a role in the development and progression of multiple cancers. See also 'cancer, epithelial, Scribble-complex-related' (FBhh0000586) and 'cancer, epithelial, RAS-LLGL-related' (FBhh0000588).

In human, there are two genes orthologous to Dmel\l(2)gl, the cytoskeletal proteins LLGL1 and LLGL2. Classical loss-of-function alleles, RNAi-targeting constructs, and alleles caused by insertional mutagenesis have been generated for l(2)gl; an amorphic allele has been created via gene targeting and recombination. A tagged wild-type transgene of human Hsap\LLGL1 has been introduced into flies; partial heterologous rescue (functional complementation) of the homozygous Dmel\l(2)gl lethal phenotype is observed.

Animals homozygous for loss-of-function mutations of Dmel\l(2)gl typically die during the larval stage. Somatic clones that are homozygous for loss-of-function mutations of l(2)gl exhibit a cell polarity defect; mutant cells are eliminated from mosaic epithelia by cell competition. Multiple physical and many genetic interactions for Dmel\l(2)gl have been described; see below and in the gene report for l(2)gl.

In human, there are two genes orthologous to Dmel\yki, YAP1 and WWTR1. Classical loss-of-function alleles, RNAi-targeting constructs, and alleles caused by insertional mutagenesis have been generated for yki; an amorphic allele has been created via gene targeting and recombination. Multiple UAS constructs of the human Hsap\YAP1 gene have been introduced into flies, including wild-type and genes with mutations eliminating phosphorylation sites.

Animals homozygous for an amorphic mutation of Dmel\yki die as late embryos and early first instar larvae. Somatic clones are difficult to recover and are very small, indicating that complete loss of function is virtually cell-lethal. Models of cancer involving Dmel\yki use a constitutively active form or drive overexpression of a wild-type gene. MANY physical and genetic interactions for Dmel\yki have been described; see below and in the gene report for yki.

Clones of cells with an amorphic mutation of Dmel\l(2)gl and overexpression of Dmel\yki cause overgrowth of mutant cells in the wing pouch, eventually developing into tumors.

[updated Aug. 2017 by FlyBase; FBrf0222196]

Disease Summary Information
Disease Summary: cancer, epithelial, LLGL-YAP1-related
OMIM report
Human gene(s) implicated
Symptoms and phenotype
Genetics
Cellular phenotype and pathology
Molecular information

LLGL1 and LLGL2 encode cortical cytoskeleton proteins found in a complex involved in maintaining cell polarity and epithelial integrity, the Scribble Cell Polarity Complex. This complex plays a role in the initial phase of the establishment of epithelial cell polarity; it is involved in the regulation of mitotic spindle orientation, proliferation, differentiation, and tissue organization of neuroepithelial cells. [Gene Cards, LLGL1, LLGL2; 2017.08.01]

YAP1 encodes a transcriptional regulator which can act both as a coactivator and a corepressor and is the critical downstream regulatory target in the Hippo signaling pathway; it thus plays a key role development, growth, repair, and homeostasis. YAP1 is known to play a role in the development and progression of multiple cancers. [Gene Cards, YAP1; 2017.08.01]

External links
Disease synonyms
Ortholog Information
Human gene(s) in FlyBase
Human gene (HGNC)
D. melanogaster ortholog (based on DIOPT)
Comments on ortholog(s)

Many to one: 2 human to 1 Drosophila; the second human gene is WWTR1.

Human gene (HGNC)
D. melanogaster ortholog (based on DIOPT)
Comments on ortholog(s)

Many to one: 2 human to 1 Drosophila; the second human gene is LLGL2.

Human gene (HGNC)
D. melanogaster ortholog (based on DIOPT)
Comments on ortholog(s)

Many to one: 2 human to 1 Drosophila; the second human gene is LLGL1.

Other mammalian ortholog(s) used
    D. melanogaster Gene Information (2)
    Gene Snapshot
    lethal (2) giant larvae (l(2)gl) encodes a tumor suppressor protein that regulates cell polarity and asymmetric cell division. It acts on the basolateral side of epithelial cells, antagonizing the activity of apical complex proteins encoded by baz, par-6 and aPKC. [Date last reviewed: 2019-09-26]
    Gene Groups / Pathways
    Comments on ortholog(s)

    Moderate- to high-scoring ortholog of human LLGL1 and LLGL2 (1 Drosophila to 2 human). Dmel\l(2)gl shares 34-36% identity and 51-54% similarity with the human genes.

    Orthologs and Alignments from DRSC
    DIOPT - DRSC Integrative Ortholog Prediction Tool - Click the link below to search for orthologs in Humans
    Gene Snapshot
    yorkie (yki) encodes a transcriptional co-activator protein that is negatively regulated by Hippo signaling, which promotes its cytoplasmic localization. It functions together with DNA binding proteins, such as the product of sd, to activate transcription of a wide range of downstream targets, including genes that promote growth. [Date last reviewed: 2019-03-21]
    Gene Groups / Pathways
    Comments on ortholog(s)

    Moderate-scoring ortholog of human YAP1 and WWTR1 (1 Drosophila to 2 human). Dmel\yki shares 31% identity and 45% similarity with YAP1; it shares 25% identity and 34% similarity with WWTR1.

    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 (97 groups)
      protein-protein
      Interacting group
      Assay
      References
      anti tag coimmunoprecipitation, anti tag western blot
      anti bait coimmunoprecipitation, western blot, experimental knowledge based, proximity ligation assay, fluorescence microscopy, anti tag coimmunoprecipitation, peptide massfingerprinting
      anti tag coimmunoprecipitation, western blot
      anti tag coimmunoprecipitation, western blot
      proximity ligation assay, fluorescence microscopy
      anti tag coimmunoprecipitation, anti tag western blot
      anti tag coimmunoprecipitation, western blot
      anti tag coimmunoprecipitation, western blot
      anti tag coimmunoprecipitation, western blot, anti bait coimmunoprecipitation
      anti bait coimmunoprecipitation, western blot, anti tag western blot, peptide massfingerprinting, experimental knowledge based, pull down, autoradiography, anti tag coimmunoprecipitation
      anti tag coimmunoprecipitation, anti tag western blot, proximity ligation assay, fluorescence microscopy, pull down, Identification by mass spectrometry
      anti tag coimmunoprecipitation, anti tag western blot
      anti tag coimmunoprecipitation, anti tag western blot
      RNA-RNA
      Interacting group
      Assay
      References
      luminiscence technology
      fluorescence technology
      RNA-protein
      Interacting group
      Assay
      References
      anti tag coimmunoprecipitation, quantitative reverse transcription pcr
      protein-protein
      Interacting group
      Assay
      References
      anti tag coimmunoprecipitation, anti tag western blot, protein complementation assay, peptide massfingerprinting
      anti tag coimmunoprecipitation, anti tag western blot, peptide massfingerprinting, western blot
      pull down, peptide massfingerprinting, anti tag coimmunoprecipitation, western blot, anti tag western blot
      enzymatic study, western blot
      anti tag coimmunoprecipitation, peptide massfingerprinting
      anti bait coimmunoprecipitation, peptide massfingerprinting
      anti tag coimmunoprecipitation, anti tag western blot, pull down, Identification by mass spectrometry
      anti bait coimmunoprecipitation, peptide massfingerprinting, anti tag coimmunoprecipitation, anti tag western blot
      anti tag coimmunoprecipitation, Identification by mass spectrometry, anti tag western blot
      anti tag coimmunoprecipitation, anti tag western blot
      anti tag coimmunoprecipitation, peptide massfingerprinting
      anti tag coimmunoprecipitation, western blot, anti tag western blot
      enzymatic study, western blot
      anti tag coimmunoprecipitation, anti tag western blot, peptide massfingerprinting
      anti tag coimmunoprecipitation, peptide massfingerprinting, anti tag western blot
      anti tag coimmunoprecipitation, peptide massfingerprinting
      anti tag coimmunoprecipitation, peptide massfingerprinting
      anti tag coimmunoprecipitation, anti tag western blot
      anti tag coimmunoprecipitation, peptide massfingerprinting, anti tag western blot
      anti tag coimmunoprecipitation, anti tag western blot, peptide massfingerprinting
      anti tag coimmunoprecipitation, anti tag western blot
      anti tag coimmunoprecipitation, tag visualisation
      coimmunoprecipitation, western blot
      anti tag coimmunoprecipitation, anti tag western blot
      proximity ligation assay, fluorescence microscopy, anti tag coimmunoprecipitation, western blot
      anti tag coimmunoprecipitation, peptide massfingerprinting, anti tag western blot
      anti tag coimmunoprecipitation, anti tag western blot, pull down, peptide massfingerprinting, Identification by mass spectrometry, anti bait coimmunoprecipitation, western blot
      anti tag coimmunoprecipitation, anti tag western blot, anti bait coimmunoprecipitation, western blot, pull down
      pull down, peptide massfingerprinting
      anti tag coimmunoprecipitation, peptide massfingerprinting
      enzymatic study, autoradiography, anti tag coimmunoprecipitation, anti tag western blot
      anti tag coimmunoprecipitation, peptide massfingerprinting, anti tag western blot
      proximity ligation assay, fluorescence microscopy, anti tag coimmunoprecipitation, anti tag western blot, peptide massfingerprinting
      anti tag coimmunoprecipitation, anti tag western blot
      anti tag coimmunoprecipitation, peptide massfingerprinting
      anti tag coimmunoprecipitation, peptide massfingerprinting
      anti tag coimmunoprecipitation, anti tag western blot, pull down, peptide massfingerprinting
      anti tag coimmunoprecipitation, peptide massfingerprinting
      anti tag coimmunoprecipitation, anti tag western blot, peptide massfingerprinting
      anti tag coimmunoprecipitation, anti tag western blot, western blot
      anti tag coimmunoprecipitation, anti tag western blot
      anti bait coimmunoprecipitation, peptide massfingerprinting
      anti bait coimmunoprecipitation, peptide massfingerprinting
      anti bait coimmunoprecipitation, peptide massfingerprinting
      anti bait coimmunoprecipitation, peptide massfingerprinting
      anti bait coimmunoprecipitation, peptide massfingerprinting
      anti tag coimmunoprecipitation, anti tag western blot
      anti tag coimmunoprecipitation, anti tag western blot
      pull down, peptide massfingerprinting, anti tag coimmunoprecipitation, tandem affinity purification, Identification by mass spectrometry, anti tag western blot
      anti tag coimmunoprecipitation, anti tag western blot, anti bait coimmunoprecipitation, peptide massfingerprinting, pull down, western blot
      proximity ligation assay, fluorescence microscopy
      anti tag coimmunoprecipitation, anti tag western blot, pull down, western blot
      anti tag coimmunoprecipitation, peptide massfingerprinting, experimental knowledge based, anti tag western blot
      anti bait coimmunoprecipitation, peptide massfingerprinting
      anti tag coimmunoprecipitation, anti tag western blot
      anti tag coimmunoprecipitation, anti tag western blot
      anti bait coimmunoprecipitation, western blot, anti tag coimmunoprecipitation, anti tag western blot
      pull down, peptide massfingerprinting
      anti tag coimmunoprecipitation, peptide massfingerprinting
      enzymatic study, autoradiography
      anti tag coimmunoprecipitation, anti tag western blot, western blot
      anti tag coimmunoprecipitation, peptide massfingerprinting
      anti tag coimmunoprecipitation, anti tag western blot, anti bait coimmunoprecipitation
      anti tag coimmunoprecipitation, peptide massfingerprinting
      experimental knowledge based
      fluorescent resonance energy transfer, anti tag coimmunoprecipitation, anti tag western blot, surface plasmon resonance, predetermined participant, two hybrid, peptide massfingerprinting, anti bait coimmunoprecipitation, pull down, autoradiography, western blot
      anti tag coimmunoprecipitation, peptide massfingerprinting, anti tag western blot
      anti tag coimmunoprecipitation, anti tag western blot
      anti tag coimmunoprecipitation, anti tag western blot
      proximity ligation assay, fluorescence microscopy
      coimmunoprecipitation, anti tag western blot, anti tag coimmunoprecipitation, peptide massfingerprinting
      anti tag coimmunoprecipitation, peptide massfingerprinting, molecular sieving, molecular weight, pull down, anti tag western blot, two hybrid, isothermal titration calorimetry, predetermined participant, Identification by mass spectrometry, nuclear magnetic resonance
      anti tag coimmunoprecipitation, anti tag western blot, anti bait coimmunoprecipitation, western blot, pull down, peptide massfingerprinting
      pull down, western blot
      proximity ligation assay, fluorescence microscopy, anti tag coimmunoprecipitation, western blot, bimolecular fluorescence complementation
      anti tag coimmunoprecipitation, anti tag western blot, pull down, western blot
      anti tag coimmunoprecipitation, anti tag western blot
      anti tag coimmunoprecipitation, anti tag western blot
      anti tag coimmunoprecipitation, anti tag western blot, peptide massfingerprinting, pull down
      anti tag coimmunoprecipitation, anti tag western blot, enzymatic study, autoradiography, peptide massfingerprinting, western blot, two hybrid, pull down
      Alleles Reported to Model Human Disease (Disease Ontology) (34 alleles)
      Models Based on Experimental Evidence ( 8 )
      Allele
      Disease
      Evidence
      References
      Modifiers Based on Experimental Evidence ( 4 )
      Models Based on Experimental Evidence ( 15 )
      Allele
      Disease
      Evidence
      References
      Modifiers Based on Experimental Evidence ( 19 )
      Allele
      Disease
      Interaction
      References
      model of  cancer
      is ameliorated by lzUAS.cBa
      is exacerbated by trioUAS.cUa
      model of  cancer
      is exacerbated by GlnRSKK109443
      is ameliorated by AlaRSGD8009
      is exacerbated by ArgRSGD14098
      is ameliorated by AsnRSGD7064
      is ameliorated by AsnRSKK100240
      is ameliorated by AspRSGD1339
      is exacerbated by CysRSGD13923
      is ameliorated by GlyRSKK107421
      is exacerbated by HisRSKK102374
      is exacerbated by LysRSKK101852
      is exacerbated by ThrRSGD1342
      is exacerbated by TyrRSGD11353
      is ameliorated by Ilp8MI00727
      is ameliorated by ImpL2GD6004
      is ameliorated by Lgr3Δ50
      is ameliorated by Ilp8KK112161
      exacerbates  carcinoma
      model of  cancer
      is ameliorated by foxoTM.UAS
      is ameliorated by panΔN.UAS
      is ameliorated by wgHMS00794
      is ameliorated by wgJF01257
      is ameliorated by AktHMS00007
      is ameliorated by ITPGD3825
      is ameliorated by ITPJF01817
      is ameliorated by ImpL2HMC05809
      is ameliorated by upd3HMS00646
      is ameliorated by domeGD2612
      is ameliorated by hopHMS00761
      Models Based on Experimental Evidence ( 1 )
      Allele
      Disease
      Evidence
      References
      Modifiers Based on Experimental Evidence ( 1 )
      Allele
      Disease
      Interaction
      References
      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
      spontaneous
      amorphic allele - genetic evidence
      spontaneous
      spontaneous
      amorphic allele - molecular evidence
      ends-out gene targeting
      References (10)