B6db activities : 4_3_1

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	4.3.1.17
Description	L-serine ammonia-lyase.
Alternative names	L-serine dehydratase. Serine deaminase. L-hydroxyaminoacid dehydratase. L-serine deaminase. L-serine hydro-lyase (deaminating).
Catalyzed reaction	L-serine = pyruvate + NH(3).
Cofactor	Pyridoxal-phosphate or iron-sulfur cluster.
Comments	-!- This reaction is also carried out by L-threonine ammonia-lyase (EC 4.3.1.19) from a number of sources. -!- The reaction catalyzed probably involves initial elimination of water (hence the enzyme's original classification as EC 4.2.1.13), followed by isomerization and hydrolysis of the product with C-N bond breakage. -!- Formerly EC 4.2.1.13.
	PLP-independent L-serine ammonia-lyases are used by some bacteria.
Prosite	PROSITE; PDOC00149;
PDB	1P5J; 1PWH ;
Organisms	-Bacteria -Fungi -Metazoa -Human
Family	4.3.1.17 (22)

Links	Enzyme (activities) 4.3.1.17 BRENDA (activities) 4.3.1.17 KEGG (pathways) 4.3.1.17 PLPMDB (PLP mutants) 4.3.1.17

References	Yamada T, Komoto J, Kasuya T, Takata Y, Ogawa H, Mori H, Takusagawa F. (2008) A catalytic mechanism that explains a low catalytic activity of serine dehydratase like-1 from human cancer cells: Crystal structure and site-directed mutagenesis studies Biochim Biophys Acta 1780 809-18. Sun L, Bartlam M, Liu Y, Pang H, Rao Z. (2005) Crystal structure of the pyridoxal-5'-phosphate-dependent serine dehydratase from human liver Acta Crystallogr D Biol Crystallogr 14 791-8. Yamada, T.; Komoto, J.; Takata, Y.; Ogawa, H.; Pitot, H.C.; Takusagawa, F. (2003) Crystal structure of serine dehydratase from rat liver Biochemistry 42 12854-65.. Grabowski, R.; Hofmeister, A. E.; Buckel, W. (1993) Bacterial L-serine dehydratases: a new family of enzymes containing iron-sulfur clusters Trends Biochem Sci 18 297-300.. Bornaes, C.; Petersen, J.G.; Holmberg, S. (1992) Serine and threonine catabolism in Saccharomyces cerevisiae: the CHA1 polypeptide is homologous with other serine and threonine dehydratases Genetics 131 531-9.. Ogawa, H.; Fujioka, M.; Date, T.; Mueckler, M.; Su, Y.; Pitot, H.C. (1990) Rat serine dehydratase gene codes for two species of mRNA of which only one is translated into serine dehydratase J Biol Chem 265 14407-13.. Ogawa, H.; Gomi, T.; Konishi, K.; Date, T.; Nakashima, H.; Nose, K.; Matsuda, Y.; Peraino, C.; Pitot, H.C.; Fujioka, M. (1989) Human liver serine dehydratase. cDNA cloning and sequence homology with hydroxyamino acid dehydratases from other sources J Biol Chem 264 15818-23.. Articles on 4.3.1.17

last changed	2008/03/27 19:26

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