Skip to main content

SYX/PLEKHG5, A Rhoa Guanine Exchange Factor Involved in Cell Migration and Angiogenesis

  • Reference work entry
  • First Online:
  • 51 Accesses

Synonyms

Plekhg5; Syx; Tech

Historical Background

Plekhg5 first emerged as a partial cDNA clone KIAA0720 in the HUGE (Human Unidentified Gene-Encoded) database of large proteins analyzed by the Kazusa Human cDNA Project in Japan (http://www.kazusa.or.jp/huge). It was initially characterized as a RhoA-specific GEF and a potential oncogen named GEF720 (de Toledo et al. 2003). Independently, the rat cDNA of the same protein (named Tech) was characterized also as a RhoA-specific GEF that was highly expressed in cortical and hippocampal neurons (Marx et al. 2005). Two full-length cDNA clones of the mouse ortholog were identified as splice variants (named Syx1 and Syx2) and characterized as participants in cell motility (Liu and Horowitz 2006).

Splice Variants and Domain Structure

The majority of the known splice-variants of Plekhg5 are produced by the initiation of transcription at alternate 5′ start codons (http://www.uniprot.org/uniprot/O94827). These five transcripts code for variants...

This is a preview of subscription content, log in via an institution.

Buying options

Chapter
USD   29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD   4,499.99
Price excludes VAT (USA)
  • Available as EPUB and PDF
  • Read on any device
  • Instant download
  • Own it forever
Hardcover Book
USD   4,499.99
Price excludes VAT (USA)
  • Durable hardcover edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Learn about institutional subscriptions

References

  • de Toledo M, Senic-Matuglia F, Salamero J, Uze G, Comunale F, Fort P, Blangy A. The GTP/GDP cycling of rho GTPase TCL is an essential regulator of the early endocytic pathway. Mol Biol Cell. 2003;14(12):4846–56. PMID 12960428.

    Article  PubMed  PubMed Central  Google Scholar 

  • Ernkvist M, Luna Persson N, Audebert S, Lecine P, Sinha I, Liu M, Schlueter M, Horowitz A, Aase K, Weide T, Borg JP, Majumdar A, Holmgren L. The Amot/Patj/Syx signaling complex spatially controls RhoA GTPase activity in migrating endothelial cells. Blood. 2009;113(1):244–53. PMID 18824598.

    Article  PubMed  PubMed Central  CAS  Google Scholar 

  • Estevez MA, Henderson JA, Ahn D, Zhu XR, Poschmann G, Lubbert H, Marx R, Baraban JM. The neuronal RhoA GEF, Tech, interacts with the synaptic multi-PDZ-domain-containing protein, MUPP1. J Neurochem. 2008;106(3):1287–97. PMID 18537874.

    Article  PubMed  PubMed Central  CAS  Google Scholar 

  • Garcia-Mata R, Burridge K. Catching a GEF by its tail. Trends Cell Biol. 2007;17(1):36–43. PMID 17126549.

    Article  PubMed  CAS  Google Scholar 

  • Garnaas MK, Moodie KL, Liu ML, Samant GV, Li K, Marx R, Baraban JM, Horowitz A, Ramchandran R. Syx, a RhoA guanine exchange factor, is essential for angiogenesis in vivo. Circ Res. 2008;103(7):710–6. PMID 18757825.

    Article  PubMed  PubMed Central  CAS  Google Scholar 

  • Goh LL, Manser E. The RhoA GEF Syx is a target of Rnd3 and regulated via a Raf1-like ubiquitin-related domain. PLoS One. 2010;5(8):e12409. PMID 20811643.

    Article  PubMed  PubMed Central  CAS  Google Scholar 

  • Liu M, Horowitz A. A PDZ-binding motif as a critical determinant of Rho guanine exchange factor function and cell phenotype. Mol Biol Cell. 2006;17(4):1880–7. PMID 16467373.

    Article  PubMed  PubMed Central  CAS  Google Scholar 

  • Marx R, Henderson J, Wang J, Baraban JM. Tech: a RhoA GEF selectively expressed in hippocampal and cortical neurons. J Neurochem. 2005;92(4):850–8. PMID 15686487.

    Article  PubMed  CAS  Google Scholar 

  • Matsuda A, Suzuki Y, Honda G, Muramatsu S, Matsuzaki O, Nagano Y, Doi T, Shimotohno K, Harada T, Nishida E, Hayashi H, Sugano S. Large-scale identification and characterization of human genes that activate NF-kappaB and MAPK signaling pathways. Oncogene. 2003;22(21):3307–18. PMID 12761501.

    Article  PubMed  CAS  Google Scholar 

  • Maystadt I, Zarhrate M, Leclair-Richard D, Estournet B, Barois A, Renault F, Routon MC, Durand MC, Lefebvre S, Munnich A, Verellen-Dumoulin C, Viollet L. A gene for an autosomal recessive lower motor neuron disease with childhood onset maps to 1p36. Neurology. 2006;67(1):120–4. PMID 16728649.

    Article  PubMed  CAS  Google Scholar 

  • Maystadt I, Rezsohazy R, Barkats M, Duque S, Vannuffel P, Remacle S, Lambert B, Najimi M, Sokal E, Munnich A, Viollet L, Verellen-Dumoulin C. The nuclear factor kappaB-activator gene PLEKHG5 is mutated in a form of autosomal recessive lower motor neuron disease with childhood onset. Am J Hum Genet. 2007;81(1):67–76. PMID 17564964.

    Article  PubMed  PubMed Central  CAS  Google Scholar 

  • Ross CA, Poirier MA. Opinion: what is the role of protein aggregation in neurodegeneration? Nat Rev Mol Cell Biol. 2005;6(11):891–8. PMID 16167052.

    Article  PubMed  CAS  Google Scholar 

  • Wells CD, Fawcett JP, Traweger A, Yamanaka Y, Goudreault M, Elder K, Kulkarni S, Gish G, Virag C, Lim C, Colwill K, Starostine A, Metalnikov P, Pawson T. A Rich1/Amot complex regulates the Cdc42 GTPase and apical-polarity proteins in epithelial cells. Cell. 2006;125(3):535–48. PMID 16678097.

    Article  PubMed  CAS  Google Scholar 

  • Wennerberg K, Forget MA, Ellerbroek SM, Arthur WT, Burridge K, Settleman J, Der CJ, Hansen SH. Rnd proteins function as RhoA antagonists by activating p190 RhoGAP. Curr Biol. 2003;13(13):1106–15. PMID 12842009.

    Article  PubMed  PubMed Central  CAS  Google Scholar 

  • Wu C, Agrawal SA, Vasanji A, Sarkaria S, Xie J, Liu M, Anand-Apte B, Horowitz A. Rab13-dependent trafficking of RhoA is required for directional migration and angiogenesis. J Biol Chem. 2011;286(26):23511–20. PMID 21543326.

    Article  PubMed  PubMed Central  CAS  Google Scholar 

  • Yanai I, Benjamin H, Shmoish M, Chalifa-Caspi V, Shklar M, Ophir R, Bar-Even A, Horn-Saban S, Safran M, Domany E, Lancet D, Shmueli O. Genome-wide midrange transcription profiles reveal expression level relationships in human tissue specification. Bioinformatics. 2005;21(5):650–9. PMID 15388519.

    Article  PubMed  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Arie Horowitz .

Editor information

Editors and Affiliations

Rights and permissions

Reprints and permissions

Copyright information

© 2018 Springer International Publishing AG

About this entry

Check for updates. Verify currency and authenticity via CrossMark

Cite this entry

Horowitz, A. (2018). SYX/PLEKHG5, A Rhoa Guanine Exchange Factor Involved in Cell Migration and Angiogenesis. In: Choi, S. (eds) Encyclopedia of Signaling Molecules. Springer, Cham. https://doi.org/10.1007/978-3-319-67199-4_567

Download citation

Publish with us

Policies and ethics