Pectate trisaccharide-lyase

Pectate trisaccharide-lyase (EC 4.2.2.22, exopectate-lyase, pectate lyase A, PelA) is an enzyme with systematic name (1->4)-alpha-D-galacturonan reducing-end-trisaccharide-lyase.^[1]^[2]^[3] This enzyme catalyses the following chemical reaction

eliminative cleavage of unsaturated trigalacturonate as the major product from the reducing end of polygalacturonic acid/pectate

The predominant action of this enzyme is removal of a trisaccharide.

References

↑ Kluskens, L.D.; van Alebeek, G.J.; Voragen, A.G.; de Vos, W.M.; van der Oost, J. (2003). "Molecular and biochemical characterization of the thermoactive family 1 pectate lyase from the hyperthermophilic bacterium Thermotoga maritima". Biochem. J. 370: 651–659. doi:10.1042/bj20021595. PMID 12443532.
↑ Tamaru, Y.; Doi, R.H. (2001). "Pectate lyase A, an enzymatic subunit of the Clostridium cellulovorans cellulosome". Proc. Natl. Acad. Sci. USA. 98: 4125–4129. doi:10.1073/pnas.071045598. PMID 11259664.
↑ Berensmeier, S.; Singh, S.A.; Meens, J.; Buchholz, K. (2004). "Cloning of the pelA gene from Bacillus licheniformis 14A and biochemical characterization of recombinant, thermostable, high-alkaline pectate lyase". Appl. Microbiol. Biotechnol. 64: 560–567. doi:10.1007/s00253-003-1446-9. PMID 14673544.

Carbon-oxygen lyases (EC 4.2) (primarily dehydratases)

4.2.1: Hydro-Lyases	Carbonic anhydrase Fumarase Aconitase Enolase Alpha Enolase 2 Enoyl-CoA hydratase/3-Hydroxyacyl ACP dehydrase Methylglutaconyl-CoA hydratase Tryptophan synthase Cystathionine beta synthase Porphobilinogen synthase 3-Isopropylmalate dehydratase Urocanase Uroporphyrinogen III synthase Nitrile hydratase

4.2.2: Acting on polysaccharides	Hyaluronate lyase

4.2.3: Acting on phosphates	Threonine synthase

4.2.99: Other	Carboxymethyloxysuccinate lyase

Enzymes

Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Catalytically perfect enzyme Coenzyme Cofactor Enzyme catalysis Enzyme kinetics Lineweaver–Burk plot Michaelis–Menten kinetics

Regulation	Allosteric regulation Cooperativity Enzyme inhibitor

Classification	EC number Enzyme superfamily Enzyme family List of enzymes

Types	EC1 Oxidoreductases (list) EC2 Transferases (list) EC3 Hydrolases (list) EC4 Lyases (list) EC5 Isomerases (list) EC6 Ligases (list)

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