By R. Malcolm Jr. Brown, Inder M. Saxena
This e-book is an up to date treatise at the such a lot complex and provocative learn into the biosynthesis, constitution, and purposes of Nature’s such a lot ample macromolecule and renewable source, cellulose. Molecular, biochemical, and evolutionary elements of cellulose biosynthesis are reviewed in a number of dwelling organisms. First hand info from the best researchers distinguishes this paintings from different books on cellulose.
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Extra resources for Cellulose: Molecular and Structural Biology: Selected articles on the synthesis, structure, and applications of cellulose
Several lines of evidence support a role for CesA gene products in controlling TC assembly and thus, microfibril structure. First, immunolabeling of freezefracture replicas of TCs with antibodies raised against a CesA gene product demonstrated that CesA proteins reside within TCs (Kimura et al. 1999). Second, specific association between CesA subunits from both Arabidopsis and cotton have been demonstrated in vitro (Taylor et al. 2000; Kurek et al. 2002; Gardiner et al. 2003; Taylor et al. 2003).
The only known except for Halicystis, which produces the cellulose II crystalline allomorph that does not occur as extended microfibrils (Roberts 1991). Membrane insertion of linear TCs in green algae also varies along taxonomic lines (Hotchkiss 1989). For example, the TCs of Oocystis (Trebouxiophyceae) appear to span only the outer leaflet of the plasma membrane, whereas the TCs of Valonia (Ulvophyceae) span the entire membrane. Rosette TCs have been found exclusively and almost universally in the streptophytes that have been examined (Brown, Jr.
3 Tip growth and the function of Cellulose synthase-like type D (CslD) genes The CesA gene superfamily also includes CesA-like (Csl) genes containing the D,D,D,QXXRW motif characteristic of processive glycosyl transferases (Richmond and Somerville 2001). The Csls have been proposed to function in cell wall synthesis (Richmond and Somerville 2001), but only the CslA class has been characterized functionally (Dhugga et al. 2004; Liepman et al. 2005). The class of Csls with highest sequence similarity to CesAs, the CslDs, are expressed in tip growing cells such as pollen tubes (Doblin et al.