The growing world of expansins.

Expansins are cell wall proteins that induce pH-dependent wall extension and stress relaxation in a characteristic and unique manner. Two families of expansins are known, named alpha- and beta-expansins, and they comprise large multigene families whose members show diverse organ-, tissue- and cell-specific expression patterns. Other genes that bear distant sequence similarity to expansins are also represented in the sequence databases, but their biological and biochemical functions have not yet been uncovered. Expansin appears to weaken glucan-glucan binding, but its detailed mechanism of action is not well established. The biological roles of expansins are diverse, but can be related to the action of expansins to loosen cell walls, for example during cell enlargement, fruit softening, pollen tube and root hair growth, and abscission. Expansin-like proteins have also been identified in bacteria and fungi, where they may aid microbial invasion of the plant body.

[1]  D. Cosgrove,et al.  Acid-growth response and alpha-expansins in suspension cultures of bright yellow 2 tobacco. , 1998, Plant physiology.

[2]  R. Wrobel,et al.  Differential RNA expression of alpha-expansin gene family members in the parasitic angiosperm Triphysaria versicolor (Scrophulariaceae). , 2001, Gene.

[3]  C. Seoighe,et al.  Expansin-Like Molecules: Novel Functions Derived from Common Domains , 2002, Journal of Molecular Evolution.

[4]  Y. Wu,et al.  A fungal endoglucanase with plant cell wall extension activity. , 2001, Plant physiology.

[5]  Two expansin cDNAs from Prunus armeniaca" expressed during fruit ripening are differently regulated by ethylene , 2002 .

[6]  H. Vogler,et al.  Limited correlation between expansin gene expression and elongation growth rate. , 2000, Plant physiology.

[7]  D. Cosgrove,et al.  Group I allergens of grass pollen as cell wall-loosening agents. , 1997, Proceedings of the National Academy of Sciences of the United States of America.

[8]  H. Kende,et al.  Expression of beta-expansins is correlated with internodal elongation in deepwater rice. , 2001, Plant physiology.

[9]  A. Fleming,et al.  Expansins in the bryophyte Physcomitrella patens , 2002, Plant Molecular Biology.

[10]  R. E. Sharp,et al.  Growth Maintenance of the Maize Primary Root at Low Water Potentials Involves Increases in Cell-Wall Extension Properties, Expansin Activity, and Wall Susceptibility to Expansins , 1996, Plant physiology.

[11]  R. O’Malley,et al.  Expansin Message Regulation in Parasitic Angiosperms: Marking Time in Development , 2000, Plant Cell.

[12]  S. McQueen-Mason,et al.  Expansin Mode of Action on Cell Walls (Analysis of Wall Hydrolysis, Stress Relaxation, and Binding) , 1995, Plant physiology.

[13]  D. Cosgrove,et al.  Subcellular localization of expansin mRNA in xylem cells. , 2000, Plant physiology.

[14]  H. Kende,et al.  Expansins in Deepwater Rice Internodes , 1997, Plant physiology.

[15]  D. Cosgrove,et al.  Autolysis and extension of isolated walls from growing cucumber hypocotyls. , 1994, Journal of experimental botany.

[16]  A. Fleming,et al.  Analysis of expansin-induced morphogenesis on the apical meristem of tomato , 1999, Planta.

[17]  N. Carpita.  STRUCTURE AND BIOGENESIS OF THE CELL WALLS OF GRASSES. , 1996, Annual review of plant physiology and plant molecular biology.

[18]  H. Kende,et al.  α-Expansins in the semiaquatic ferns Marsilea quadrifolia and Regnellidium diphyllum: evolutionary aspects and physiological role in rachis elongation , 2000, Planta.

[19]  S. Rochange,et al.  Impaired growth in transgenic plants over-expressing an expansin isoform , 2001, Plant Molecular Biology.

[20]  A. Bennett,et al.  Expression of a divergent expansin gene is fruit-specific and ripening-regulated. , 1997, Proceedings of the National Academy of Sciences of the United States of America.

[21]  A. Bennett,et al.  Cooperative disassembly of the cellulose-xyloglucan network of plant cell walls: parallels between cell expansion and fruit ripening. , 1999, Trends in plant science.

[22]  E. Harrison,et al.  Expression of six expansin genes in relation to extension activity in developing strawberry fruit. , 2001, Journal of experimental botany.

[23]  M. Kita,et al.  Changes in the levels of mRNAs for putative cell growth-related genes in the albedo and flavedo during citrus fruit development , 2000, Plant Cell Reports.

[24]  D. Cosgrove,et al.  Altered expression of expansin modulates leaf growth and pedicel abscission in Arabidopsis thaliana. , 2000, Proceedings of the National Academy of Sciences of the United States of America.

[25]  R. E. Sharp,et al.  Modification of expansin transcript levels in the maize primary root at low water potentials. , 2001, Plant physiology.

[26]  R. Pike,et al.  Immunological cross-reactivity of the major allergen from perennial ryegrass (Lolium perenne), Lol p I, and the cysteine proteinase, bromelain. , 1997, International archives of allergy and immunology.

[27]  A. Darke,et al.  In vitro assembly of cellulose/xyloglucan networks: ultrastructural and molecular aspects , 1995 .

[28]  D J Cosgrove,et al.  Enzymes and other agents that enhance cell wall extensibility. , 1999, Annual review of plant physiology and plant molecular biology.

[29]  M. Schlaak,et al.  Studies on the carbohydrate moieties of the timothy grass pollen allergen Phl p I , 1995, Electrophoresis.

[30]  M. Pezzotti,et al.  Pollination modulates expression of the PPAL gene, a pistil-specific β-expansin , 2002, Plant Molecular Biology.

[31]  C. Ma,et al.  Postharvest fruit quality of transgenic tomatoes suppressed in expression of a ripening-related expansin , 2002 .

[32]  A. Petersen,et al.  Properties of group I allergens from grass pollen and their relation to cathepsin B, a member of the C1 family of cysteine proteinases. , 2002, European journal of biochemistry.

[33]  Thomas L. Madden,et al.  BLAST 2 Sequences, a new tool for comparing protein and nucleotide sequences. , 1999, FEMS microbiology letters.

[34]  A. Fleming,et al.  Differential expression of α- and β-expansin genes in the elongating leaf of Festuca pratensis , 2001, Plant Molecular Biology.

[35]  T. Wahlroos,et al.  The cellulase encoded by the native plasmid of Clavibacter michiganensis ssp. sepedonicus plays a role in virulence and contains an expansin-like domain , 2000 .

[36]  A. Fleming,et al.  Local expression of expansin induces the entire process of leaf development and modifies leaf shape , 2001, Proceedings of the National Academy of Sciences of the United States of America.

[37]  P. Green.  Expansin and morphology: a role for biophysics , 1997 .

[38]  T. D. Schneider,et al.  Sequence logos: a new way to display consensus sequences. , 1990, Nucleic acids research.

[39]  C. Kuhlemeier,et al.  Localized Upregulation of a New Expansin Gene Predicts the Site of Leaf Formation in the Tomato Meristem , 1998, Plant Cell.

[40]  M. Schlaak,et al.  Grass group I allergens (β‐expansins) are novel, papain‐relatedproteinases , 1999 .

[41]  D. Crowell,et al.  Expression and Processing of a Hormonally Regulated β-Expansin from Soybean , 2001 .

[42]  George Jeronimidis,et al.  Mechanical properties of primary plant cell wall analogues , 2002, Planta.

[43]  D J Cosgrove,et al.  Molecular cloning and sequence analysis of expansins--a highly conserved, multigene family of proteins that mediate cell wall extension in plants. , 1995, Proceedings of the National Academy of Sciences of the United States of America.

[44]  M. Penttilä,et al.  Swollenin, a Trichoderma reesei protein with sequence similarity to the plant expansins, exhibits disruption activity on cellulosic materials. , 2002, European journal of biochemistry.

[45]  A. Bennett,et al.  Modification of Expansin Protein Abundance in Tomato Fruit Alters Softening and Cell Wall Polymer Metabolism during Ripening , 1999, Plant Cell.

[46]  D. Crowell,et al.  Cytokinin regulates the expression of a soybean β-expansin gene by a post-transcriptional mechanism , 1998, Plant Molecular Biology.

[47]  D. Cosgrove,et al.  An oat coleoptile wall protein that induces wall extension in vitro and that is antigenically related to a similar protein from cucumber hypocotyls , 1993, Planta.

[48]  Mitchell,et al.  Roles of cellulose and xyloglucan in determining the mechanical properties of primary plant cell walls , 1999, Plant physiology.

[49]  G. Barthe,et al.  A novel protein associated with citrus blight has sequence similarities to expansin , 1998, Plant Molecular Biology.

[50]  K. Hasenstein,et al.  Distribution of expansins in graviresponding maize roots. , 2000, Plant & cell physiology.

[51]  R. Furbank,et al.  The Control of Single-Celled Cotton Fiber Elongation by Developmentally Reversible Gating of Plasmodesmata and Coordinated Expression of Sucrose and K+ Transporters and Expansin , 2001, Plant Cell.

[52]  S. McQueen-Mason,et al.  The relationship between xyloglucan endotransglycosylase and in-vitro cell wall extension in cucumber hypocotyls , 2004, Planta.

[53]  D. Choi,et al.  Expansins: ever-expanding numbers and functions. , 2001, Current opinion in plant biology.

[54]  P. Rougé,et al.  Homology modeling of the cellulose-binding domain of a pollen allergen from rye grass: structural basis for the cellulose recognition and associated allergenic properties. , 2002, Biochemical and biophysical research communications.

[55]  D. Cosgrove.  Relaxation in a high-stress environment: the molecular bases of extensible cell walls and cell enlargement. , 1997, The Plant cell.

[56]  H. Kende,et al.  Expression of expansin genes is correlated with growth in deepwater rice. , 1997, The Plant cell.

[57]  D J Cosgrove,et al.  Disruption of hydrogen bonding between plant cell wall polymers by proteins that induce wall extension. , 1994, Proceedings of the National Academy of Sciences of the United States of America.

[58]  D. Cosgrove,et al.  Grass group I pollen allergens (beta-expansins) lack proteinase activity and do not cause wall loosening via proteolysis. , 2001, European journal of biochemistry.

[59]  M. Gidley,et al.  Probing expansin action using cellulose/hemicellulose composites. , 2000, The Plant journal : for cell and molecular biology.

[60]  A. Fleming,et al.  Plant Expansins Are a Complex Multigene Family with an Ancient Evolutionary Origin1 , 2002, Plant Physiology.

[61]  S. McQueen-Mason,et al.  Two endogenous proteins that induce cell wall extension in plants. , 1992, The Plant cell.

[62]  K. Bradford,et al.  Two tomato expansin genes show divergent expression and localization in embryos during seed development and germination. , 2001, Plant physiology.

[63]  M. Braun,et al.  Root hair formation: F-actin-dependent tip growth is initiated by local assembly of profilin-supported F-actin meshworks accumulated within expansin-enriched bulges. , 2000, Developmental biology.

[64]  L. Voesenek,et al.  Submergence induces expansin gene expression in flooding-tolerant Rumex palustris and not in flooding-intolerant R. acetosa , 2000, Planta.

[65]  D. Brummell,et al.  Differential expression of expansin gene family members during growth and ripening of tomato fruit , 2004, Plant Molecular Biology.

[66]  Daniel J. Cosgrove,et al.  Loosening of plant cell walls by expansins , 2000, Nature.

[67]  R. Meeley,et al.  Analysis and Expression of the α-Expansin and β-Expansin Gene Families in Maize , 2001 .

[68]  S. Hoffmann-Benning,et al.  Characterization of Growth-related Osmiophilic Particles in Corn Coleoptiles and Deepwater Rice Internodes , 1994 .

[69]  J. Timmis,et al.  Characterisation of six α-expansin genes in Gossypium hirsutum (upland cotton) , 2002, Molecular Genetics and Genomics.

[70]  S. McQueen-Mason,et al.  The molecular basis of plant cell wall extension. , 2001 .