Encyclopedia of Signaling Molecules

2018 Edition
| Editors: Sangdun Choi


  • Jose L. Orgaz
  • Victoria Sanz-MorenoEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-67199-4_101793


Historical Background

RhoA was identified as a homolog of small GTPase Ras in a study using a cDNA library from mollusk Aplysia, hence its first name Aplysia Ras-related Homolog (ARH) 12 (Madaule and Axel 1985). RhoA, along with very related RhoB and RhoC, constitute the Rho subfamily of GTPases within the superfamily of Ras-related small GTPases and are found in all eukaryotic cells (Jaffe and Hall 2005). RhoA gene is located on chromosome 1 3p21.3 and, given that it is longer and contains more exons and introns, has been suggested to be the ancestor of both RhoC and RhoB (Wheeler and Ridley 2004), which evolved as duplication ( RhoC) or reverse transcription ( RhoB) from RhoA (Boureux et al. 2007; Wheeler and Ridley 2004). In line with this hypothesis, orthologs of RhoA, but not RhoC or RhoB, are found in nonvertebrates (Boureux et al. 2007). At the protein level, RhoA and RhoC are around 90%...
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Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  1. 1.Randall Division of Cell and Molecular BiophysicsKing’s College LondonLondonUK