# SCRIB > Mediated Wiki article. Canonical URL: https://mediated.wiki/source/SCRIB > Markdown URL: https://mediated.wiki/source/SCRIB.md > Source: https://en.wikipedia.org/wiki/SCRIB > Source revision: 1300849341 > License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) {{Short description|Protein-coding gene in the species Homo sapiens}} {{Infobox_gene}} {{For|the early portable computer|Scrib}} '''SCRIB''', also known as '''Scribble''', '''SCRIBL''', or '''Scribbled homolog (Drosophila)''', is a scaffold [protein](/source/protein) which in humans is encoded by the ''SCRIB'' [gene](/source/gene).{{cite web | title = Entrez Gene: SCRIB scribbled homolog (Drosophila)| url = https://www.ncbi.nlm.nih.gov/gene?Db=gene&Cmd=ShowDetailView&TermToSearch=23513}}{{cite journal | vauthors = Nagase T, Seki N, Tanaka A, Ishikawa K, Nomura N | title = Prediction of the coding sequences of unidentified human genes. IV. The coding sequences of 40 new genes (KIAA0121-KIAA0160) deduced by analysis of cDNA clones from human cell line KG-1 | journal = DNA Res. | volume = 2 | issue = 4 | pages = 167–74, 199–210 |date=August 1995 | pmid = 8590280 | doi = 10.1093/dnares/2.4.167| doi-access = free }} It was originally isolated in [Drosophila melanogaster](/source/Drosophila_melanogaster) in a pathway (also known as the Scribble complex) with [DLGAP5](/source/DLGAP5) (Discs large) and [LLGL1](/source/LLGL1) (Lethal giant larvae) as a tumor suppressor.{{cite journal | author = Patrick Humbert | author2 = Sarah Russell | author3 = Helena Richardson| title = Dlg, Scribble and Lgl in cell polarity, cell proliferation and cancer | journal = BioEssays | volume = 25 | issue = 6 | pages = 542–53 |date=June 2003| pmid = 12766944 | doi=10.1002/bies.10286}} In humans, SCRIB is found as a membrane protein and is involved in [cell migration](/source/cell_migration), [cell polarity](/source/cell_polarity), and [cell proliferation](/source/cell_proliferation) in [epithelial cells](/source/epithelial_cells).{{cite journal | author =L E Dow | author2 =J S Kauffman | author3 =J Caddy| author4 =A S Peterson | author5 =S M Jane| author6 =S M Russell | author7 =P O Humbert | name-list-style =amp | title = The tumour-suppressor Scribble dictates cell polarity during directed epithelial migration: regulation of Rho GTPase recruitment to the leading edge | journal = Oncogene | volume = 26 | issue = 16 | pages = 2272–82 |date=April 2007 | pmid = 17043654 | doi=10.1038/sj.onc.1210016| doi-access =free }} There is also strong evidence that SCRIB may play a role in cancer progression because of its strong [homology](/source/Homology_(biology)) to the Drosophila protein. == Function == In ''[Drosophila melanogaster](/source/Drosophila_melanogaster)'', SCRIB is involved in synaptic function, neuroblast differentiation, and epithelial polarization. Mechanistically, the human [homolog](/source/homolog) is a scaffold protein linked to [cellular differentiation](/source/cellular_differentiation) centered on the regulation of epithelial as well as neuronal morphogenesis. Deficiency in SCRIB impairs many aspects of [cell polarity](/source/Cell_migration) and [cell movement](/source/cell_migration). SCRIB is also likely involved in establishing apical-basal polarity as well as progression from the [G1 phase](/source/G1_phase) to [S phase](/source/S_phase) in the [cell cycle](/source/cell_cycle) as a result of its relationship with [cell proliferation](/source/cell_proliferation) and [exocytosis](/source/exocytosis). The transcribed protein products of the SCRIB gene along with [DLGAP5](/source/DLGAP5) (Discs large) and [LLGL1](/source/LLGL1) (Lethal giant larvae) are components of the Scribble complex that is localized in the basolateral membrane. The Scribble complex plays a role in determining [cell polarity](/source/cell_polarity) and [cell proliferation](/source/cell_proliferation) in [epithelial cells](/source/epithelial_cells).{{cite journal | vauthors = Royer C, Lu X | title = Epithelial cell polarity: a major gatekeeper against cancer? | journal = Cell Death Differ. | volume = 18 | issue = 9 | pages = 1470–7 |date=September 2011 | pmid = 21617693 | pmc = 3178423 | doi = 10.1038/cdd.2011.60 }} The precise mechanism by which these proteins function together is currently unknown, but they have been implicated in several signaling pathways, vesicle trafficking, and in the [myosin](/source/myosin) II-actin cytoskeleton. The Scribble complex has been shown to promote basolateral membrane identity by antagonizing both the Par complex and the Crumbs complex, which promote apical membrane identity. These genes have also been identified as tumor suppressors in ''Drosophila melanogaster''. Since these genes are highly conserved in humans, there is evidence that they play a role in cancer progression. == Structure == The human homolog is a LAP protein, it contains 16 [leucine](/source/leucine)-rich repeats and four [PDZ domain](/source/PDZ_domain)s.{{cite journal | author = Jennifer N. Murdoch | author2 = Deborah J. Henderson | author3 = Kit Doudney | author4 = Carles Gaston-Massuet | author5 = Helen M. Phillips | author6 = Caroline Paternotte | author7 = Ruth Arkell | author8 = Philip Stanier | author9 = Andrew J. Copp | name-list-style = amp | title = Disruption of scribble (Scrb1) causes severe neural tube defects in the circletail mouse. | journal = Hum. Mol. Genet. | volume = 12 | issue = 2 | pages = 87–98 |date=November 2002 | pmid = 12499390 | doi=10.1093/hmg/12.2.87| doi-access = free }} SCRIB belongs to a protein complex containing betaPIX, an exchange factor for Rac/Cdc42, and [GIT1](/source/GIT1), a GTPase activating protein for [ARF6](/source/ARF6) implicated in receptor recycling and exocytosis.{{cite journal | vauthors = Nola S, Sebbagh M, Marchetto S, Osmani N, Nourry C, Audebert S, Navarro C, Rachel R, Montcouquiol M, Sans N, Etienne-Manneville S, Borg JP, Santoni MJ | title = Scrib regulates PAK activity during the cell migration process | journal = Hum. Mol. Genet. | volume = 17 | issue = 22 | pages = 3552–65 |date=November 2008 | pmid = 18716323 | doi = 10.1093/hmg/ddn248 | doi-access = free }} == Subcellular and tissue distribution == SCRIB is found in the cell membrane most often as a [peripheral membrane protein](/source/peripheral_membrane_protein). The Scribble complex is localized at the basolateral membrane. SCRIB is also found in cellular junctions such as [adherens junctions](/source/adherens_junctions) and [tight junctions](/source/tight_junctions).{{cite journal | vauthors = Petit MM, Meulemans SM, Alen P, Ayoubi TA, Jansen E, Van de Ven WJ | title = The tumor suppressor Scrib interacts with the zyxin-related protein LPP, which shuttles between cell adhesion sites and the nucleus. | journal = BMC Cell Biol. | volume = 6 | issue = 1 | pages = 1 |date=January 2005 | pmid = 15649318 | doi=10.1186/1471-2121-6-1 | pmc=546208 | doi-access = free }} Specifically, it is located in the [kidney](/source/kidney), [skeletal muscles](/source/skeletal_muscles), [liver](/source/liver), [lung](/source/lung), [breast](/source/breast), [intestine](/source/intestine), [placenta](/source/placenta) and [epithelial](/source/epithelial) cells.{{cite journal | vauthors = Navarro C, Nola S, Audebert S, Santoni MJ, Arsanto JP, Ginestier C, Marchetto S, Jacquemier J, Isnardon D, Le Bivic A, Birnbaum D, Borg JP | title = Junctional recruitment of mammalian Scribble relies on E-cadherin engagement | journal = Oncogene | volume = 24 | issue = 27 | pages = 4330–9 |date=June 2005 | pmid = 15806148 | doi=10.1038/sj.onc.1208632| doi-access = free }} == Clinical significance == The [PDZ domain](/source/PDZ_domain) of SCRIB binds directly to the [human papillomavirus](/source/human_papillomavirus) E6 protein.{{cite journal | vauthors = Nakagawa S, Huibregtse JM | title = Human scribble (Vartul) is targeted for ubiquitin-mediated degradation by the high-risk papillomavirus E6 proteins and the E6AP ubiquitin-protein ligase | journal = Mol. Cell. Biol. | volume = 20 | issue = 21 | pages = 8244–53 |date=November 2000 | pmid = 11027293 | pmc = 86433 | doi = 10.1128/MCB.20.21.8244-8253.2000}} SCRIB is targeted for [ubiquitination](/source/ubiquitination) by a complex of E6 and [UBE3A](/source/UBE3A) and E6 induces degradation of SCRIB. === Role as a tumor suppressor === As mentioned above, SCRIB has been identified as a tumor suppressor along with [DLGAP5](/source/DLGAP5) (Discs large) and [LLGL1](/source/LLGL1) (Lethal giant larvae). Specifically, SCRIB deficient mutants have been shown to promote the activity of numerous [oncogenes](/source/oncogenes). For example, SCRIB is known to inhibit breast cancer formation and the depletion of SCRIB promotes [neoplastic](/source/neoplastic) growth by disrupting [morphogenesis](/source/morphogenesis) and inhibiting [cell death](/source/cell_death) through an association with [Myc](/source/Myc).{{cite journal | vauthors = Zhan L, Rosenberg A, Bergami KC, Yu M, Xuan Z, Jaffe AB, Allred C, Muthuswamy SK | title = Deregulation of scribble promotes mammary tumorigenesis and reveals a role for cell polarity in carcinoma | journal = Cell | volume = 135 | issue = 5 | pages = 865–78 |date=November 2008 | pmid = 19041750 | doi = 10.1016/j.cell.2008.09.045 | pmc=3015046}} In human cells expressing [oncogenic](/source/oncogenic) Ras or Raf, it was found the loss of SCRIB resulted in the invasion of the [extracellular matrix](/source/extracellular_matrix) by various cell types. This is believed to be a direct result of regulation of the [MAP Kinase](/source/MAP_Kinase) pathway by SCRIB.{{cite journal | author = L E Dow | author2 = I A Elsum | author3 = C L King| author4 = K M Kinross | author5 = H E Richardson | author6 = P O Humbert | name-list-style = amp| title = Loss of human Scribble cooperates with H-Ras to promote cell invasion through deregulation of MAPK signalling | journal = Oncogene | volume = 27 | issue = 46 | pages = 5988–6001 |date=July 2008 | pmid = 18641685 | doi=10.1038/onc.2008.219| doi-access = free }} === Role in epithelial mesenchymal transition (EMT) === Due to its role in [cell polarity](/source/cell_polarity) and [cell motility](/source/cell_motility), SCRIB has also been implicated in [epithelial mesenchymal transition](/source/epithelial_mesenchymal_transition) (EMT), which is linked to tumor [metastasis](/source/metastasis) and proliferation in many [cancers](/source/cancers). EMT is implicated in cancer progression by allowing static [epithelial](/source/epithelial) cells to become migratory and allowing these cells to adapt to as well as colonize new environments. In cancerous epithelial tissues, SCRIB is found primarily in the cytosol as opposed to its usual location in the membrane, thus further implicating a role in tumor progression and EMT for SCRIB.{{cite journal | author = Valentina Vaira | author2 = Alice Faversani | author3 = Takehiko Dohi | author4 = Marco Maggioni | author5 = Mario Nosotti | author6 = Delfina Tosi | author7 = Dario C Altieri | author8 = Silvano Bosari| title = Aberrant Overexpression of the Cell Polarity Module Scribble in Human Cancer | journal = The American Journal of Pathology | volume = 178 | issue = 6 | pages = 2478–83 |date=June 2011| pmid = 21549346 | doi=10.1016/j.ajpath.2011.02.028 | pmc=3124121}} Knockdown mutants have resulted in the loss of adhesion between Madin-Darby canine kidney epithelial cells. This loss of adhesion was correlated with an acquired [mesenchymal](/source/mesenchymal) appearance, an increase in motility, and loss of directionality. These effects were a direct result of the interruption of [E-cadherin](/source/E-cadherin)-mediated cellular adhesion.{{cite journal | author = Yi Qin | author2 = Christopher Capaldo | author3 = Barry M. Gumbiner | author4 = Ian G. Macara | name-list-style = amp | title = The mammalian SCRIB polarity protein regulates epithelial cell adhesion and migration through E-cadherin | journal = Journal of Cell Biology | volume = 171 | issue = 6 | pages = 1061–71 |date=December 2005 | pmid = 16344308 | doi=10.1083/jcb.200506094 | pmc=2171311}} A decrease in cell migration and an overall decrease in cell motility markers as well as [epithelial mesenchymal transition](/source/epithelial_mesenchymal_transition) mediators was also observed in small lung adenocarcinoma cells that were depleted of SCRIB. == References == {{reflist|35em}} == Further reading == {{refbegin|35em}} *{{cite journal |vauthors=Nakajima D, Okazaki N, Yamakawa H, etal |title=Construction of expression-ready cDNA clones for KIAA genes: manual curation of 330 KIAA cDNA clones. |journal=DNA Res. |volume=9 |issue= 3 |pages= 99–106 |year= 2003 |pmid= 12168954 |doi=10.1093/dnares/9.3.99 |doi-access=free }} *{{cite journal |vauthors=Nagase T, Seki N, Tanaka A, etal |title=Prediction of the coding sequences of unidentified human genes. IV. The coding sequences of 40 new genes (KIAA0121-KIAA0160) deduced by analysis of cDNA clones from human cell line KG-1. |journal=DNA Res. |volume=2 |issue= 4 |pages= 167–74, 199–210 |year= 1996 |pmid= 8590280 |doi=10.1093/dnares/2.4.167 |doi-access=free }} *{{cite journal | vauthors=Nakagawa S, Huibregtse JM |title=Human scribble (Vartul) is targeted for ubiquitin-mediated degradation by the high-risk papillomavirus E6 proteins and the E6AP ubiquitin-protein ligase. |journal=Mol. Cell. Biol. |volume=20 |issue= 21 |pages= 8244–53 |year= 2000 |pmid= 11027293 |doi=10.1128/MCB.20.21.8244-8253.2000 | pmc=86433 }} *{{cite journal |vauthors=Strausberg RL, Feingold EA, Grouse LH, etal |title=Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences. |journal=Proc. Natl. Acad. Sci. U.S.A. |volume=99 |issue= 26 |pages= 16899–903 |year= 2003 |pmid= 12477932 |doi= 10.1073/pnas.242603899 | pmc=139241 |bibcode=2002PNAS...9916899M |doi-access=free }} *{{cite journal |vauthors=Dow LE, Brumby AM, Muratore R, etal |title=hScrib is a functional homologue of the Drosophila tumour suppressor Scribble. |journal=Oncogene |volume=22 |issue= 58 |pages= 9225–30 |year= 2004 |pmid= 14681682 |doi= 10.1038/sj.onc.1207154 |doi-access= free }} *{{cite journal |vauthors=Nakagawa S, Yano T, Nakagawa K, etal |title=Analysis of the expression and localisation of a LAP protein, human scribble, in the normal and neoplastic epithelium of uterine cervix. |journal=Br. J. Cancer |volume=90 |issue= 1 |pages= 194–9 |year= 2004 |pmid= 14710229 |doi= 10.1038/sj.bjc.6601465 | pmc=2395302 }} *{{cite journal |vauthors=Bouwmeester T, Bauch A, Ruffner H, etal |title=A physical and functional map of the human TNF-alpha/NF-kappa B signal transduction pathway. |journal=Nat. Cell Biol. |volume=6 |issue= 2 |pages= 97–105 |year= 2004 |pmid= 14743216 |doi= 10.1038/ncb1086 |s2cid=11683986 }} *{{cite journal |vauthors=Brill LM, Salomon AR, Ficarro SB, etal |title=Robust phosphoproteomic profiling of tyrosine phosphorylation sites from human T cells using immobilized metal affinity chromatography and tandem mass spectrometry. |journal=Anal. Chem. |volume=76 |issue= 10 |pages= 2763–72 |year= 2004 |pmid= 15144186 |doi= 10.1021/ac035352d }} *{{cite journal | vauthors=Lehner B, Sanderson CM |title=A protein interaction framework for human mRNA degradation. |journal=Genome Res. |volume=14 |issue= 7 |pages= 1315–23 |year= 2004 |pmid= 15231747 |doi= 10.1101/gr.2122004 | pmc=442147 }} *{{cite journal | author=Borg JP |title=[hScrib: a potential novel tumor suppressor] |journal=Pathol. Biol. |volume=52 |issue= 6 |pages= 328–31 |year= 2004 |pmid= 15261375 |doi= 10.1016/j.patbio.2003.09.015 }} *{{cite journal |vauthors=Beausoleil SA, Jedrychowski M, Schwartz D, etal |title=Large-scale characterization of HeLa cell nuclear phosphoproteins. |journal=Proc. Natl. Acad. Sci. U.S.A. |volume=101 |issue= 33 |pages= 12130–5 |year= 2004 |pmid= 15302935 |doi= 10.1073/pnas.0404720101 | pmc=514446 |bibcode=2004PNAS..10112130B |doi-access=free }} *{{cite journal |vauthors=Ballif BA, Villén J, Beausoleil SA, etal |title=Phosphoproteomic analysis of the developing mouse brain. |journal=Mol. Cell. Proteomics |volume=3 |issue= 11 |pages= 1093–101 |year= 2005 |pmid= 15345747 |doi= 10.1074/mcp.M400085-MCP200 |doi-access= free }} *{{cite journal |vauthors=Gerhard DS, Wagner L, Feingold EA, etal |title=The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC). |journal=Genome Res. |volume=14 |issue= 10B |pages= 2121–7 |year= 2004 |pmid= 15489334 |doi= 10.1101/gr.2596504 | pmc=528928 }} *{{cite journal |vauthors=Petit MM, Meulemans SM, Alen P, etal |title=The tumor suppressor Scrib interacts with the zyxin-related protein LPP, which shuttles between cell adhesion sites and the nucleus. |journal=BMC Cell Biol. |volume=6 |issue= 1 |pages= 1 |year= 2006 |pmid= 15649318 |doi= 10.1186/1471-2121-6-1 | pmc=546208 |doi-access=free }} *{{cite journal |vauthors=Barrios-Rodiles M, Brown KR, Ozdamar B, etal |title=High-throughput mapping of a dynamic signaling network in mammalian cells. |journal=Science |volume=307 |issue= 5715 |pages= 1621–5 |year= 2005 |pmid= 15761153 |doi= 10.1126/science.1105776 |bibcode=2005Sci...307.1621B |s2cid=39457788 }} *{{cite journal |vauthors=Lahuna O, Quellari M, Achard C, etal |title=Thyrotropin receptor trafficking relies on the hScrib-betaPIX-GIT1-ARF6 pathway. |journal=EMBO J. |volume=24 |issue= 7 |pages= 1364–74 |year= 2005 |pmid= 15775968 |doi= 10.1038/sj.emboj.7600616 | pmc=1142541 }} *{{cite journal |vauthors=Navarro C, Nola S, Audebert S, etal |title=Junctional recruitment of mammalian Scribble relies on E-cadherin engagement. |journal=Oncogene |volume=24 |issue= 27 |pages= 4330–9 |year= 2005 |pmid= 15806148 |doi= 10.1038/sj.onc.1208632 |doi-access= free }} *{{cite journal |vauthors=Métais JY, Navarro C, Santoni MJ, etal |title=hScrib interacts with ZO-2 at the cell-cell junctions of epithelial cells. |journal=FEBS Lett. |volume=579 |issue= 17 |pages= 3725–30 |year= 2005 |pmid= 15975580 |doi= 10.1016/j.febslet.2005.05.062 |s2cid=4893407 |doi-access=free }} *{{cite journal |vauthors=Thomas M, Massimi P, Navarro C, etal |title=The hScrib/Dlg apico-basal control complex is differentially targeted by HPV-16 and HPV-18 E6 proteins. |journal=Oncogene |volume=24 |issue= 41 |pages= 6222–30 |year= 2005 |pmid= 16103886 |doi= 10.1038/sj.onc.1208757 |doi-access= free }} {{refend}} {{PDB Gallery|geneid=23513}} --- Adapted from the Wikipedia article [SCRIB](https://en.wikipedia.org/wiki/SCRIB) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/SCRIB?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.