+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Heterotrimeric G-proteins in green algae. An early innovation in the evolution of the plant lineage

, : Heterotrimeric G-proteins in green algae. An early innovation in the evolution of the plant lineage. Plant Signaling & Behavior 9(4): E28457-E28457

Heterotrimeric G-proteins (G-proteins, hereafter) are important signaling components in all eukaryotes. The absence of these proteins in the sequenced genomes of Chlorophycean green algae has raised questions about their evolutionary origin and prevalence in the plant lineage. The existence of G-proteins has often been correlated with the acquisition of embryophytic life-cycle and/or terrestrial habitats of plants which occurred around 450 million years ago. Our discovery of functional G-proteins in Chara braunii, a representative of the Charophycean green algae, establishes the existence of this conserved signaling pathway in the most basal plants and dates it even further back to 1-1.5 billion years ago. We have now identified the sequence homologs of G-proteins in additional algal families and propose that green algae represent a model system for one of the most basal forms of G-protein signaling known to exist to date. Given the possible differences that exist between plant and metazoan G-protein signaling mechanisms, such basal organisms will serve as important resources to trace the evolutionary origin of proposed mechanistic differences between the systems as well as their plant-specific functions.


PMID: 25764428

DOI: 10.4161/psb.28457

Other references

Poglazova, M.N.; Meĭsel', M.N., 1971: Localization of benz(a)pyrene in bacterial cells. Mikrobiologiia 40(6): 1050-1053

van den Ende, M., 1939: Some observations on reversed anaphylaxis. The symptoms and autopsy findings in guineapigs following intravenous injection of antisera prepared against guineapig serum fractions are described. Two types of reaction were observed, acute and delayed, similar to those described in direct anap...

Jackson, E.B.; Thoms, H., 2011: The rooming-in plan for mothers and newborn infants. Connecticut State Medical Journal 11(3): 175-175

Mo, Y.; Lim, L-Yong., 2005: Paclitaxel-loaded PLGA nanoparticles: potentiation of anticancer activity by surface conjugation with wheat germ agglutinin. Purpose: To potentiate the anticancer activity of paclitaxel-loaded PLGA nanoparticles through surface conjugation with wheat germ agglutinin (WGA).Methods: PLGA nanoparticles loaded with paclitaxel and isopropyl myristate (IPM) as release modifie...

Beeler N.M.; Wong T.F.; Hickman S.H., 2003: On the expected relationships among apparent stress, static stress drop, effective shear fracture energy, and efficiency. We consider expected relationships between apparent stress tau (sub a) and static stress drop Delta tau (sub s) using a standard energy balance and find tau (sub a) = Delta tau (sub s) (0.5-xi ), where xi is stress overshoot. A simple implementati...

Kurzawinska, H., 1998: Effect of fungi colonizing the Sphagnum peat substrate of Gerbera on the growth of Phytophthora cryptogea Pethybr. et Laff. The effect of the fungal community colonizing the growing media of Gerbera jamesonii (Sphagnum peat) on the growth of P. cryptogea was investigated. Sphagnum peat and plant samples for mycological analyses were taken after 8 months plant growth, w...

Steinberg-Neifach, O.; Lue, N.F., 2015: Telomere DNA recognition in Saccharomycotina yeast: potential lessons for the co-evolution of ssDNA and dsDNA-binding proteins and their target sites. In principle, alterations in the telomere repeat sequence would be expected to disrupt the protective nucleoprotein complexes that confer stability to chromosome ends, and hence relatively rare events in evolution. Indeed, numerous organisms in di...

Feizy, J.; Beheshti, H.Reza.; Asadi, M., 2014: A survey of aflatoxin in cotton seed in Iran by HPLC with on-line photochemical derivatisation and fluorescence detection. The aflatoxins content of 140 cotton seed samples were determined using high-performance liquid chromatography. Samples were obtained from wholesalers in Iran between May 2010 and June 2011. Aflatoxin B₁ gave the highest incidence of contaminati...

Calvopina H.M.; Guderian, R.H.; Paredes Y.W.; Cooper, P.J., 2003: Comparison of two single-day regimens of triclabendazole for the treatment of human pulmonary paragonimiasis. A well-tolerated single-day treatment regimen is required for the community-based treatment of pulmonary paragonimiasis. To identify an optimal single-day treatment regimen, an open clinical trial was performed to compare the efficacy of 2 single-...

Jeleva, M.; Scull, I. de la Cruz, J., 1984: Acaros oribatidos de los suelos pecuarios cubanos Primera parte. Revista Cubana de Ciencias Veterinarias, 152: 165-169