ENTRY       zma00030                    Pathway
NAME        Pentose phosphate pathway - Zea mays (maize)
DESCRIPTION The pentose phosphate pathway is a process of glucose turnover that produces NADPH as reducing equivalents and pentoses as essential parts of nucleotides. There are two different phases in the pathway. One is irreversible oxidative phase in which glucose-6P is converted to ribulose-5P by oxidative decarboxylation, and NADPH is generated [MD:M00006]. The other is reversible non-oxidative phase in which phosphorylated sugars are interconverted to generate xylulose-5P, ribulose-5P, and ribose-5P [MD:M00007]. Phosphoribosyl pyrophosphate (PRPP) formed from ribose-5P [MD:M00005] is an activated compound used in the biosynthesis of histidine and purine/pyrimidine nucleotides. This pathway map also shows the Entner-Doudoroff pathway where 6-P-gluconate is dehydrated and then cleaved into pyruvate and glyceraldehyde-3P [MD:M00008].
CLASS       Metabolism; Carbohydrate metabolism
PATHWAY_MAP zma00030  Pentose phosphate pathway
MODULE      zma_M00004  Pentose phosphate pathway (Pentose phosphate cycle) [PATH:zma00030]
            zma_M00005  PRPP biosynthesis, ribose 5P => PRPP [PATH:zma00030]
            zma_M00006  Pentose phosphate pathway, oxidative phase, glucose 6P => ribulose 5P [PATH:zma00030]
            zma_M00007  Pentose phosphate pathway, non-oxidative phase, fructose 6P => ribose 5P [PATH:zma00030]
DBLINKS     GO: 0006098
ORGANISM    Zea mays (maize) [GN:zma]
GENE        542313  glucose-6-phosphate isomerase, cytosolic [KO:K01810] [EC:5.3.1.9]
            100281592  glucose-6-phosphate isomerase [KO:K01810] [EC:5.3.1.9]
            100382805  uncharacterized protein LOC100382805 [KO:K01810] [EC:5.3.1.9]
            100284317  glucose-6-phosphate 1-dehydrogenase, cytoplasmic isoform [KO:K00036] [EC:1.1.1.49 1.1.1.363]
            100383765  glucose-6-phosphate 1-dehydrogenase [KO:K00036] [EC:1.1.1.49 1.1.1.363]
            100383421  Glucose-6-phosphate 1-dehydrogenase [KO:K00036] [EC:1.1.1.49 1.1.1.363]
            100279290  uncharacterized protein LOC100279290 [KO:K00036] [EC:1.1.1.49 1.1.1.363]
            100304292  glucose-6-phosphate 1-dehydrogenase [KO:K00036] [EC:1.1.1.49 1.1.1.363]
            100285593  6-phosphogluconolactonase [KO:K01057] [EC:3.1.1.31]
            100285843  uncharacterized protein LOC100285843 [KO:K01057] [EC:3.1.1.31]
            100285062  uncharacterized protein LOC100285062 [KO:K01057] [EC:3.1.1.31]
            100282975  uncharacterized protein LOC100282975 [KO:K01057] [EC:3.1.1.31]
            541699  NADPH producing dehydrogenase of the oxidative pentose phosphate pathway [KO:K00033] [EC:1.1.1.44 1.1.1.343]
            100856973  6-phosphogluconate dehydrogenase, decarboxylating [KO:K00033] [EC:1.1.1.44 1.1.1.343]
            541700  6-phosphogluconate dehydrogenase 2 [KO:K00033] [EC:1.1.1.44 1.1.1.343]
            100274365  uncharacterized protein LOC100274365 [KO:K01783] [EC:5.1.3.1]
            100282201  ribulose-phosphate 3-epimerase [KO:K01783] [EC:5.1.3.1]
            100283478  ribulose-phosphate 3-epimerase [KO:K01783] [EC:5.1.3.1]
            100279513  uncharacterized protein LOC100279513 [KO:K00615] [EC:2.2.1.1]
            103646666  transketolase, chloroplastic-like [KO:K00615] [EC:2.2.1.1]
            100192890  uncharacterized protein LOC100192890 [KO:K00616] [EC:2.2.1.2]
            100284080  uncharacterized protein LOC100284080 [KO:K00616] [EC:2.2.1.2]
            100284307  transaldolase 2 [KO:K00616] [EC:2.2.1.2]
            100283465  ribose-5-phosphate isomerase [KO:K01807] [EC:5.3.1.6]
            100284292  ribose-5-phosphate isomerase [KO:K01807] [EC:5.3.1.6]
            100284771  uncharacterized protein LOC100284771 [KO:K01807] [EC:5.3.1.6]
            100285298  ribose-5-phosphate isomerase [KO:K01807] [EC:5.3.1.6]
            103655139  probable ribose-5-phosphate isomerase 2 [KO:K01807] [EC:5.3.1.6]
            100283183  ribokinase [KO:K00852] [EC:2.7.1.15]
            542358  phosphoglucomutase, cytoplasmic 2 [KO:K01835] [EC:5.4.2.2]
            542721  phosphoglucomutase, cytoplasmic 1 [KO:K01835] [EC:5.4.2.2]
            103631243  LOW QUALITY PROTEIN: phosphoglucomutase, cytoplasmic 2-like [KO:K01835] [EC:5.4.2.2]
            103631244  phosphoglucomutase, cytoplasmic 2-like [KO:K01835] [EC:5.4.2.2]
            103651489  phosphoglucomutase, chloroplastic [KO:K01835] [EC:5.4.2.2]
            118472308  phosphoglucomutase, cytoplasmic 2-like [KO:K01835] [EC:5.4.2.2]
            100272744  EC synthetase [KO:K00948] [EC:2.7.6.1]
            100279628  uncharacterized protein LOC100279628 [KO:K00948] [EC:2.7.6.1]
            542583  NADP-dependent glyceraldehyde-3-phosphate dehydrogenase [KO:K00131] [EC:1.2.1.9]
            100382228  uncharacterized protein LOC100382228 [KO:K00851] [EC:2.7.1.12]
            542261  fructose-bisphosphate aldolase, cytoplasmic isozyme [KO:K01623] [EC:4.1.2.13]
            100272845  uncharacterized protein LOC100272845 [KO:K01623] [EC:4.1.2.13]
            100273196  uncharacterized protein LOC100273196 [KO:K01623] [EC:4.1.2.13]
            100272913  fructose-bisphosphate aldolase cytoplasmic isozyme [KO:K01623] [EC:4.1.2.13]
            100286050  fructose-bisphosphate aldolase [KO:K01623] [EC:4.1.2.13]
            100502020  fructose-bisphosphate aldolase 3, chloroplastic [KO:K01623] [EC:4.1.2.13]
            103653987  fructose-bisphosphate aldolase 3, chloroplastic [KO:K01623] [EC:4.1.2.13]
            100274515  uncharacterized protein LOC100274515 [KO:K01623] [EC:4.1.2.13]
            100273700  uncharacterized protein LOC100273700 [KO:K03841] [EC:3.1.3.11]
            100216767  uncharacterized protein LOC100216767 [KO:K03841] [EC:3.1.3.11]
            100281068  fructose-1,6-bisphosphatase [KO:K03841] [EC:3.1.3.11]
            100284739  fructose-1,6-bisphosphatase, cytosolic [KO:K03841] [EC:3.1.3.11]
            103631224  fructose-1,6-bisphosphatase, cytosolic [KO:K03841] [EC:3.1.3.11]
            100279231  uncharacterized protein LOC100279231 [KO:K00850] [EC:2.7.1.11]
            100281464  6-phosphofructokinase isoform 2 [KO:K00850] [EC:2.7.1.11]
            100281585  6-phosphofructokinase 2 [KO:K00850] [EC:2.7.1.11]
            100285548  6-phosphofructokinase [KO:K00850] [EC:2.7.1.11]
            100192478  uncharacterized protein LOC100192478 isoform 1 [KO:K00850] [EC:2.7.1.11]
            100281688  6-phosphofructokinase 2 [KO:K00850] [EC:2.7.1.11]
            100280694  pyrophosphate--fructose 6-phosphate 1-phosphotransferase [KO:K00850] [EC:2.7.1.11]
            100191982  uncharacterized protein LOC100191982 [KO:K00850] [EC:2.7.1.11]
            103647427  ATP-dependent 6-phosphofructokinase 5, chloroplastic isoform X1 [KO:K00850] [EC:2.7.1.11]
            103629493  ATP-dependent 6-phosphofructokinase 7 [KO:K00850] [EC:2.7.1.11]
            103630144  ATP-dependent 6-phosphofructokinase 6 [KO:K00850] [EC:2.7.1.11]
            103630633  ATP-dependent 6-phosphofructokinase 6 [KO:K00850] [EC:2.7.1.11]
            100193340  uncharacterized protein LOC100193340 [KO:K00895] [EC:2.7.1.90]
            100382182  ppi-phosphofructokinase [KO:K00895] [EC:2.7.1.90]
            100191851  uncharacterized protein LOC100191851 [KO:K00895] [EC:2.7.1.90]
            100282190  uncharacterized protein LOC100282190 [KO:K00895] [EC:2.7.1.90]
            100280449  uncharacterized protein LOC100280449 [KO:K00895] [EC:2.7.1.90]
            103632535  LOW QUALITY PROTEIN: pyrophosphate--fructose 6-phosphate 1-phosphotransferase subunit alpha [KO:K00895] [EC:2.7.1.90]
            101027252  pyrophosphate--fructose 6-phosphate 1-phosphotransferase subunit alpha isoform X1 [KO:K00895] [EC:2.7.1.90]
COMPOUND    C00022  Pyruvate
            C00031  D-Glucose
            C00117  D-Ribose 5-phosphate
            C00118  D-Glyceraldehyde 3-phosphate
            C00119  5-Phospho-alpha-D-ribose 1-diphosphate
            C00121  D-Ribose
            C00197  3-Phospho-D-glycerate
            C00198  D-Glucono-1,5-lactone
            C00199  D-Ribulose 5-phosphate
            C00204  2-Dehydro-3-deoxy-D-gluconate
            C00221  beta-D-Glucose
            C00231  D-Xylulose 5-phosphate
            C00257  D-Gluconic acid
            C00258  D-Glycerate
            C00279  D-Erythrose 4-phosphate
            C00345  6-Phospho-D-gluconate
            C00577  D-Glyceraldehyde
            C00620  alpha-D-Ribose 1-phosphate
            C00631  2-Phospho-D-glycerate
            C00668  alpha-D-Glucose 6-phosphate
            C00672  2-Deoxy-D-ribose 1-phosphate
            C00673  2-Deoxy-D-ribose 5-phosphate
            C01151  D-Ribose 1,5-bisphosphate
            C01172  beta-D-Glucose 6-phosphate
            C01182  D-Ribulose 1,5-bisphosphate
            C01218  6-Phospho-2-dehydro-D-gluconate
            C01236  D-Glucono-1,5-lactone 6-phosphate
            C01801  Deoxyribose
            C03752  2-Amino-2-deoxy-D-gluconate
            C04442  2-Dehydro-3-deoxy-6-phospho-D-gluconate
            C05345  beta-D-Fructose 6-phosphate
            C05378  beta-D-Fructose 1,6-bisphosphate
            C05382  Sedoheptulose 7-phosphate
            C06019  D-arabino-Hex-3-ulose 6-phosphate
            C06473  2-Keto-D-gluconic acid
            C20589  D-Glucosaminate-6-phosphate
REFERENCE   
  AUTHORS   Nishizuka Y (ed).
  TITLE     [Metabolic Maps] (In Japanese)
  JOURNAL   Tokyo Kagaku Dojin (1980)
REFERENCE   
  AUTHORS   Nishizuka Y, Seyama Y, Ikai A, Ishimura Y, Kawaguchi A (eds).
  TITLE     [Cellular Functions and Metabolic Maps] (In Japanese)
  JOURNAL   Tokyo Kagaku Dojin (1997)
REFERENCE   
  AUTHORS   Michal G.
  TITLE     Biochemical Pathways
  JOURNAL   Wiley (1999)
REFERENCE   PMID:12700258
  AUTHORS   Hove-Jensen B, Rosenkrantz TJ, Haldimann A, Wanner BL.
  TITLE     Escherichia coli phnN, encoding ribose 1,5-bisphosphokinase activity (phosphoribosyl diphosphate forming): dual role in phosphonate degradation and NAD biosynthesis pathways.
  JOURNAL   J Bacteriol 185:2793-801 (2003)
            DOI:10.1128/JB.185.9.2793-2801.2003
REFERENCE   PMID:16788179
  AUTHORS   Orita I, Sato T, Yurimoto H, Kato N, Atomi H, Imanaka T, Sakai Y
  TITLE     The ribulose monophosphate pathway substitutes for the missing pentose phosphate pathway in the archaeon Thermococcus kodakaraensis.
  JOURNAL   J Bacteriol 188:4698-704 (2006)
            DOI:10.1128/JB.00492-06
REFERENCE   PMID:16428816
  AUTHORS   Kato N, Yurimoto H, Thauer RK
  TITLE     The physiological role of the ribulose monophosphate pathway in bacteria and archaea.
  JOURNAL   Biosci Biotechnol Biochem 70:10-21 (2006)
            DOI:10.1271/bbb.70.10
REFERENCE   PMID:23279921
  AUTHORS   Kouril T, Wieloch P, Reimann J, Wagner M, Zaparty M, Albers SV, Schomburg D, Ruoff P, Siebers B
  TITLE     Unraveling the function of the two Entner-Doudoroff branches in the thermoacidophilic Crenarchaeon Sulfolobus solfataricus P2.
  JOURNAL   FEBS J 280:1126-38 (2013)
            DOI:10.1111/febs.12106
REFERENCE   PMID:16458304
  AUTHORS   Reher M, Schonheit P
  TITLE     Glyceraldehyde dehydrogenases from the thermoacidophilic euryarchaeota Picrophilus torridus and Thermoplasma acidophilum, key enzymes of the non-phosphorylative Entner-Doudoroff pathway, constitute a novel enzyme family within the aldehyde dehydrogenase superfamily.
  JOURNAL   FEBS Lett 580:1198-204 (2006)
            DOI:10.1016/j.febslet.2006.01.029
REFERENCE   PMID:20023024
  AUTHORS   Reher M, Fuhrer T, Bott M, Schonheit P
  TITLE     The nonphosphorylative Entner-Doudoroff pathway in the thermoacidophilic euryarchaeon Picrophilus torridus involves a novel 2-keto-3-deoxygluconate- specific aldolase.
  JOURNAL   J Bacteriol 192:964-74 (2010)
            DOI:10.1128/JB.01281-09
REL_PATHWAY zma00010  Glycolysis / Gluconeogenesis
            zma00040  Pentose and glucuronate interconversions
            zma00052  Galactose metabolism
            zma00230  Purine metabolism
            zma00240  Pyrimidine metabolism
            zma00340  Histidine metabolism
            zma00630  Glyoxylate and dicarboxylate metabolism
            zma00750  Vitamin B6 metabolism
KO_PATHWAY  ko00030
///
