title: Identification of β-phenylalanine as a non-protein amino acid in cultivated rice, Oryza sativa.
abstract: Non-protein amino acids, often analogs of the standard 20 protein amino acids, have been discovered in many plant species. Recent research with cultivated rice (Oryza sativa) identified (3R)-β-tyrosine, as well as a tyrosine amino mutase that synthesizes (3R)-β-tyrosine from the protein amino acid (2S)-α-tyrosine. Gas chromatography-mass spectrometry (GC-MS) assays and comparison to an authentic standard showed that β-phenylalanine is also a relatively abundant non-protein amino acid in rice leaves and that its biosynthesis occurs independently from that of β-tyrosine.
authors.affiliation: Graduate School of Agriculture, Kyoto University ; Kyoto, Japan.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Yokoo
authors.affiliation: Graduate School of Agriculture, Kyoto University ; Kyoto, Japan.
authors.forename: Ryo
authors.initials: R
authors.lastname: Takata
authors.affiliation: Boyce Thompson Institute for Plant Research; Ithaca, NY USA; Present address: South China Agricultural University; Guangzhou, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Yan
authors.affiliation: Graduate School of Agriculture, Kyoto University ; Kyoto, Japan.
authors.forename: Fuka
authors.initials: F
authors.lastname: Matsumoto
authors.affiliation: Graduate School of Agriculture, Kyoto University ; Kyoto, Japan.
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Teraishi
authors.affiliation: Graduate School of Agriculture, Kyoto University ; Kyoto, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Okumoto
authors.affiliation: Boyce Thompson Institute for Plant Research ; Ithaca, NY USA.
authors.forename: Georg
authors.initials: G
authors.lastname: Jander
authors.affiliation: Graduate School of Agriculture, Kyoto University ; Kyoto, Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Mori
keywords: aminomutase; ammonia lyase; rice; β-amino acid; β-phenylalanine; β-tyrosine