Nonprotein amino acids from seeds of Cycas circinalis and Phaseolus vulgaris.
Our chemical studies on Cycas circinalis seeds from Guam has provided two new nonprotein amino acids, N-(3'-one-5'-methyl)-hexylalanine and leucine betaine. N-methylisoleucine, previously reported as a component of naturally occurring peptides, has been isolated as a free amino acid from the seeds of Phaseolus vulgaris (pinto bean), together with S-methylcysteine, pipecolic acid and a dipeptide, gamma-glutamyl-leucine.
Li
C J
CJ
Department of Botany, University of Texas at Austin 78713-7640, USA.
Brownson
D M
DM
Mabry
T J
TJ
Perera
C
C
Bell
E A
EA
D000409:Alanine / Q000031:analogs & derivatives / Q000032:analysis; D000596:Amino Acids / Q000032:analysis* / Q000737:chemistry; D001622:Betaine / Q000031:analogs & derivatives / Q000032:analysis; D003545:Cysteine / Q000031:analogs & derivatives / Q000032:analysis; D004151:Dipeptides / Q000032:analysis; D007887:Fabaceae; D007930:Leucine / Q000031:analogs & derivatives / Q000032:analysis; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010455:Peptides / Q000737:chemistry; D010875:Pipecolic Acids / Q000032:analysis; D010946:Plants, Medicinal; D012639:Seeds / Q000737:chemistry
D000596:Amino Acids; D004151:Dipeptides; C100509:N-(5-methyl-3-oxohexyl)alanine; D010455:Peptides; D010875:Pipecolic Acids; C100510:leucine betaine; C100511:gamma-glutamyl-leucine; D001622:Betaine; C008425:S-methylcysteine; D007930:Leucine; C031345:pipecolic acid; D003545:Cysteine; D000409:Alanine