# Candidate

orgId: NCBI__GCA_022180565.1
pathwayId: cys
stepId: serA
locusId: GJQ21539.1
sysName: HBSIN02_18940
desc: erythronate-4-phosphate dehydrogenase
curatedIds: curated2:Q58424
otherIds:
BRENDA::P05459,SwissProt::P05459,ecocyc::ERYTHRON4PDEHYDROG-MONOMER,metacyc::ERYTHRON4PDEHYDROG-MONOMER


orgId: NCBI__GCA_022180565.1
pathwayId: phe
stepId: PPYAT
locusId: GJQ21978.1
sysName: HBSIN02_23330
desc: branched chain amino acid aminotransferase
curatedIds:
CharProtDB::CH_024500,ecocyc::BRANCHED-CHAINAMINOTRANSFER-MONOMER,metacyc::BRANCHED-CHAINAMINOTRANSFER-MONOMER


orgId: NCBI__GCA_022180565.1
pathwayId: phe
stepId: cmutase
locusId: GJQ21552.1
sysName: HBSIN02_19070
desc: prephenate dehydratase
otherIds: BRENDA::Q9SSE7,SwissProt::Q9SSE7
curatedIds:
CharProtDB::CH_024084,SwissProt::P0A9J8,ecocyc::CHORISMUTPREPHENDEHYDRAT-MONOMER,metacyc::CHORISMUTPREPHENDEHYDRAT-MONOMER


# RequirementNotMet

orgId: NCBI__GCA_022180565.1
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.


