# Candidate

orgId: NCBI__GCA_016700335.1
pathwayId: phe
stepId: PPYAT
locusId: QQS67606.1
sysName: IPP08_05425
desc: branched-chain amino acid aminotransferase
curatedIds:
CharProtDB::CH_024500,ecocyc::BRANCHED-CHAINAMINOTRANSFER-MONOMER,metacyc::BRANCHED-CHAINAMINOTRANSFER-MONOMER


# RequirementNotMet

orgId: NCBI__GCA_016700335.1
pathwayId: cys
ruleId: from-serine-homocysteine
requiredPathwayId: met
requiredRuleId: homocysteine
comment:
Cysteine biosynthesis via the reverse transsulfuration pathway requires homocysteine, which is an intermediate in methionine biosynthesis. Homocysteine is also an intermediate in the S-adenosylmethionine cycle, so many organisms that cannot synthesize methionine can convert it to homocysteine.


