The Enzyme Database

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Accepted name: L-tryptophan—pyruvate aminotransferase
Reaction: L-tryptophan + pyruvate = indole-3-pyruvate + L-alanine
For diagram of indoleacetic acid biosynthesis, click here
Other name(s): TAA1 (gene name); vt2 (gene name)
Systematic name: L-tryptophan:pyruvate aminotransferase
Comments: This plant enzyme, along with EC, indole-3-pyruvate monooxygenase, is responsible for the biosynthesis of the plant hormone indole-3-acetate from L-tryptophan.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB
1.  Tao, Y., Ferrer, J.L., Ljung, K., Pojer, F., Hong, F., Long, J.A., Li, L., Moreno, J.E., Bowman, M.E., Ivans, L.J., Cheng, Y., Lim, J., Zhao, Y., Ballare, C.L., Sandberg, G., Noel, J.P. and Chory, J. Rapid synthesis of auxin via a new tryptophan-dependent pathway is required for shade avoidance in plants. Cell 133 (2008) 164–176. [DOI] [PMID: 18394996]
2.  Mashiguchi, K., Tanaka, K., Sakai, T., Sugawara, S., Kawaide, H., Natsume, M., Hanada, A., Yaeno, T., Shirasu, K., Yao, H., McSteen, P., Zhao, Y., Hayashi, K., Kamiya, Y. and Kasahara, H. The main auxin biosynthesis pathway in Arabidopsis. Proc. Natl. Acad. Sci. USA 108 (2011) 18512–18517. [DOI] [PMID: 22025724]
3.  Phillips, K.A., Skirpan, A.L., Liu, X., Christensen, A., Slewinski, T.L., Hudson, C., Barazesh, S., Cohen, J.D., Malcomber, S. and McSteen, P. vanishing tassel2 encodes a grass-specific tryptophan aminotransferase required for vegetative and reproductive development in maize. Plant Cell 23 (2011) 550–566. [DOI] [PMID: 21335375]
4.  Zhao, Y. Auxin biosynthesis: a simple two-step pathway converts tryptophan to indole-3-acetic acid in plants. Mol. Plant 5 (2012) 334–338. [DOI] [PMID: 22155950]
[EC created 2012]

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