Chp (GTPase)
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RhoV (or Chp or Wrch2) is a small (~21 kDa) signaling
G protein G proteins, also known as guanine nucleotide-binding proteins, are a family of proteins that act as molecular switches inside cells, and are involved in transmitting signals from a variety of stimuli outside a cell to its interior. Their act ...
(more specifically a
GTPase GTPases are a large family of hydrolase enzymes that bind to the nucleotide guanosine triphosphate (GTP) and hydrolyze it to guanosine diphosphate (GDP). The GTP binding and hydrolysis takes place in the highly conserved P-loop "G domain", a pro ...
), and is a member of the
Rho family of GTPases The Rho family of GTPases is a family of small (~21 kDa) signaling G proteins, and is a subfamily of the Ras superfamily. The members of the Rho GTPase family have been shown to regulate many aspects of intracellular actin dynamics, and are found ...
. Chp was identified in 1998 as a GTPase interacting with the p21 activated kinase PAK2. RhoV/Chp delineates with RhoU/Wrch a Rho subclass related to
Rac RAC or Rac may refer to: Organizations * Radio Amateurs of Canada * RATCH-Australia Corporation, electricity generator * Refugee Action Collective (Victoria), Melbourne, Australia * Religious Action Center of Reform Judaism, US * Rent-A-Center, ...
and Cdc42, which emerged in early multicellular organisms during evolution. RhoV/Chp depends on palmitoylation rather than prenylation for association with plasma and intracellular membranes. In Xenopus embryos, RhoV is encoded by a canonical Wnt response gene and is induced in the developing neural crest at specification. RhoV activity cooperates with the
Snai1 Zinc finger protein SNAI1 (sometimes referred to as Snail) is a protein that in humans is encoded by the ''SNAI1'' gene. Snail is a family of transcription factors that promote the repression of the adhesion molecule E-cadherin to regulate epithel ...
(Snail) transcription factor for the subsequent induction of the pro-invasive transcription factors
Snai2 Zinc finger protein SNAI2 is a transcription factor that in humans is encoded by the ''SNAI2'' gene. It promotes the differentiation and migration of certain cells and has roles in initiating gastrulation. Function This gene encodes a member ...
(Slug),
Sox9 Transcription factor SOX-9 is a protein that in humans is encoded by the ''SOX9'' gene. Function SOX-9 recognizes the sequence CCTTGAG along with other members of the HMG-box class DNA-binding proteins. It is expressed by proliferating but no ...
or
Twist Twist may refer to: In arts and entertainment Film, television, and stage * ''Twist'' (2003 film), a 2003 independent film loosely based on Charles Dickens's novel ''Oliver Twist'' * ''Twist'' (2021 film), a 2021 modern rendition of ''Olive ...
. ''Further reading:
Rho family of GTPases The Rho family of GTPases is a family of small (~21 kDa) signaling G proteins, and is a subfamily of the Ras superfamily. The members of the Rho GTPase family have been shown to regulate many aspects of intracellular actin dynamics, and are found ...
''


References

EC 3.6.5 {{3.6-enzyme-stub