Protein
S-adenosylmethionine synthase 4
Organism
Atriplex nummularia
Function
Catalyzes the formation of S-adenosylmethionine from methionine and ATP. The reaction comprises two steps that are both catalyzed by the same enzyme: formation of S-adenosylmethionine (AdoMet) and triphosphate, and subsequent hydrolysis of the triphosphate (By similarity). May be involved in the synthesis of betain in response to abiotic stress such as high salinity (PubMed:15695433).
Similarity
Belongs to the AdoMet synthase family.
Sequence
MAAAVDTFLFTSESVNEGHPDKLCDQISDAVLDACLAQDPESKVACETCTKTNLVMVFGEITTKANVDYEKIVRQTCRDIGFVSADVGLDADNCKVLVYIEQQSPDIAQGVHGHLTRRPEEIGAGDQGHMFGYATDETPELMPLSHVLATKLGARLTEVRKNGTCPWLRPDGKTQVTVEYYNENGAMVPIRVHTVLISTQHDETVTNDEIAADLKEHVIKPVIPEKYLDEKTIFHLNPSGRFVIGGPHGDAGLTGRKIIIDTYGGWGAHGGGAFSGKDPTKVDRSGAYIARQAAKSIVAAGLARRCIVQISYAIGVPEPLSVFVDTYGTGKIPDKEILKIVKETFDFRPGMIAINLDLLKGGSRYLKTAAYGHFGRDDADFTWETVKPLKWEKPQA