2007
DOI: 10.1093/aob/mcm044
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Portrait of the Expansin Superfamily in Physcomitrella patens: Comparisons with Angiosperm Expansins

Abstract: The EXPA genes of Physcomitrella are likely to have maintained the same biochemical function as angiosperm expansins despite their independent evolutionary history. Changes seen at normally conserved residues in the Physcomitrella EXPB family suggest a possible change in function as one mode of evolution in this family.

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Cited by 48 publications
(39 citation statements)
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“…Expansins (EXPNs) are not enzymes per se but loosen the noncovalent interactions between the constituents of the plant cell wall (24). They are typically plant proteins, but a functional EXPN has been characterized in cyst nematodes (25).…”
Section: Resultsmentioning
confidence: 99%
“…Expansins (EXPNs) are not enzymes per se but loosen the noncovalent interactions between the constituents of the plant cell wall (24). They are typically plant proteins, but a functional EXPN has been characterized in cyst nematodes (25).…”
Section: Resultsmentioning
confidence: 99%
“…Expansin genes have been identified in almost all the land plants studied, including briophytes (Carey and Cosgrove 2007), ferns , gymnosperms (Hutchison et al 1999) and angiosperms (Cosgrove 2000b;Li et al 2002;Sampedro et al 2006). In tomato, expansin genes are expressed during fruit development , ripening Brummel et al 1999), and seed germination (Chen and Bradford 2000), in the shoot apical meristem (Reinhardt et al 1998), in the elongation zone of hypocotyl expanding tissues (Caderas et al 2000;Catalá et al 2000), and in the submeristematic tissue of the shoot apex (Vogler et al 2003).…”
Section: Discussionmentioning
confidence: 99%
“…In more distantly related organisms, we find multi-gene EXPA and EXPB families in Selaginella (a lycopod) and Physcomitrella (a moss), but their orthology with the established angiosperm clades is harder to pinpoint because shared microsynteny is too weak [20,21]. Their common ancestor with angiosperm expansins may predate the diversification of the expansin genes represented by these clades.…”
Section: Defining Refining and Delimiting The Expansin Conceptmentioning
confidence: 99%