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MetaCyc Pathway: cellulose biosynthesis
Traceable author statement to experimental support

Pathway diagram: cellulose biosynthesis

This view shows enzymes only for those organisms listed below, in the list of taxa known to possess the pathway. If an enzyme name is shown in bold, there is experimental evidence for this enzymatic activity.

Superclasses: BiosynthesisCarbohydrates BiosynthesisPolysaccharides Biosynthesis
BiosynthesisCell Structures BiosynthesisPlant Cell StructuresPrimary Cell Wall
BiosynthesisCell Structures BiosynthesisPlant Cell StructuresSecondary Cell Wall

Some taxa known to possess this pathway include : Arabidopsis thaliana col

Expected Taxonomic Range: Bacteria , Eukaryota

Cellulose is the most abundant organic polymer found in nature. It is produced by plants, some animals, algae, fungi, flagellates and bacteria such as Komagataeibacter xylinus, Agrobacterium tumefaciens and Rhizobium spp. [Ross91]. Cellulose is an intrinsic structural component of plant primary and secondary cell walls, building a network with other carbohydrate polymers. Bacteria generally produce cellulose as an extracellular component for mechanical and chemical protection, but it can also be used to facilitate cell adhesion to host tissue [Matthysse81]. Cellulose accounts for about 20% (by weight) of the plant primary cell walls, and about 50% of the secondary cell walls.

The primary structure of cellulose is a linear array of D-glucose molecules joined by β (1,4) glycosyl linkage. The biosynthesis of cellulose is catalyzed by the cellulose synthase enzyme complex which is visualized as rosettes located in the plasma membrane. It is proposed that each rosette is composed of six subunits, and each rosette subunit in turn is composed of 6 cellulose synthases. Each individual cellulose synthase catalyzes the formation of one glucan chain which then associates with neighbor chains of the same rosette to form cellulose microfibrils [Doblin02].

In Arabidopsis the substrate for cellulose synthesis is UDP-glucose channeled from sucrose degradation. At least six cellulose synthase genes were shown to be required in cellulose synthesis in Arabidopsis. CesA1, CesA3, and CesA6 are involved in cellulose biosynthesis in the primary walls. CesA4, CesA7, and CesA8 are involved in cellulose synthesis in the secondary walls. Mutant and mutant complementation analysis indicate that these isoforms of cellulose synthase are not functionally redundant.

It was hypothesized that cellulose synthesis requires a primer, similar to glycogen biosynthesis. Recent work in cotton has shown that sitosterol-β-glucose can serve as a primer. UDP-glucose can be used to form sterol cellodextrins from sitosterol-β-glucose, presumably catalyzed by a cellulose synthase [Peng02].

It has been shown that in addition to cellulose synthase 1,4-β-D-glucan 4-glucanohydrolase is also required in cellulose biosynthesis. It is possibly involved in trimming off defective glucans from the growing microfibrils, or cleaving off the sitosterol-β-glucose primer from the growing glucan chains [Lane01].

Unification Links: AraCyc:PWY-1001


Doblin02: Doblin MS, Kurek I, Jacob-Wilk D, Delmer DP (2002). "Cellulose biosynthesis in plants: from genes to rosettes." Plant Cell Physiol 43(12);1407-20. PMID: 12514238

Lane01: Lane DR, Wiedemeier A, Peng L, Hofte H, Vernhettes S, Desprez T, Hocart CH, Birch RJ, Baskin TI, Burn JE, Arioli T, Betzner AS, Williamson RE (2001). "Temperature-sensitive alleles of RSW2 link the KORRIGAN endo-1,4-beta-glucanase to cellulose synthesis and cytokinesis in Arabidopsis." Plant Physiol 126(1);278-88. PMID: 11351091

Matthysse81: Matthysse AG, Holmes KV, Gurlitz RH (1981). "Elaboration of cellulose fibrils by Agrobacterium tumefaciens during attachment to carrot cells." J Bacteriol 145(1);583-95. PMID: 7462151

Peng02: Peng L, Kawagoe Y, Hogan P, Delmer D (2002). "Sitosterol-beta-glucoside as primer for cellulose synthesis in plants." Science 295(5552);147-50. PMID: 11778054

Ross91: Ross P, Mayer R, Benziman M (1991). "Cellulose biosynthesis and function in bacteria." Microbiol Rev 55(1);35-58. PMID: 2030672

Other References Related to Enzymes, Genes, Subpathways, and Substrates of this Pathway

Burn02: Burn JE, Hocart CH, Birch RJ, Cork AC, Williamson RE (2002). "Functional analysis of the cellulose synthase genes CesA1, CesA2, and CesA3 in Arabidopsis." Plant Physiol 129(2);797-807. PMID: 12068120

Ha02: Ha MA, MacKinnon IM, Sturcova A, Apperley DC, McCann MC, Turner SR, Jarvis MC (2002). "Structure of cellulose-deficient secondary cell walls from the irx3 mutant of Arabidopsis thaliana." Phytochemistry 61(1);7-14. PMID: 12165296

Latendresse13: Latendresse M. (2013). "Computing Gibbs Free Energy of Compounds and Reactions in MetaCyc."

Lazarowski03: Lazarowski ER, Shea DA, Boucher RC, Harden TK (2003). "Release of cellular UDP-glucose as a potential extracellular signaling molecule." Mol Pharmacol 63(5);1190-7. PMID: 12695547

Martin02: Martin T, Oswald O, Graham IA (2002). "Arabidopsis seedling growth, storage lipid mobilization, and photosynthetic gene expression are regulated by carbon:nitrogen availability." Plant Physiol 128(2);472-81. PMID: 11842151

Omadjela13: Omadjela O, Narahari A, Strumillo J, Melida H, Mazur O, Bulone V, Zimmer J (2013). "BcsA and BcsB form the catalytically active core of bacterial cellulose synthase sufficient for in vitro cellulose synthesis." Proc Natl Acad Sci U S A 110(44);17856-61. PMID: 24127606

Pauly08: Pauly M, Keegstra K (2008). "Cell-wall carbohydrates and their modification as a resource for biofuels." Plant J 54(4);559-68. PMID: 18476863

Taylor03: Taylor NG, Howells RM, Huttly AK, Vickers K, Turner SR (2003). "Interactions among three distinct CesA proteins essential for cellulose synthesis." Proc Natl Acad Sci U S A 100(3);1450-5. PMID: 12538856

Turner97: Turner SR, Somerville CR (1997). "Collapsed xylem phenotype of Arabidopsis identifies mutants deficient in cellulose deposition in the secondary cell wall." Plant Cell 9(5);689-701. PMID: 9165747

Wightman10: Wightman R, Turner S (2010). "Trafficking of the cellulose synthase complex in developing xylem vessels." Biochem Soc Trans 38(3);755-60. PMID: 20491661

Report Errors or Provide Feedback
Please cite the following article in publications resulting from the use of MetaCyc: Caspi et al, Nucleic Acids Research 42:D459-D471 2014
Page generated by Pathway Tools version 19.5 (software by SRI International) on Sat Apr 30, 2016, biocyc14.