Information on EC 1.1.1.224 - mannose-6-phosphate 6-reductase:

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EC NUMBERCOMMENTARY
1.1.1.224-

RECOMMENDED NAMEGeneOntology No.
mannose-6-phosphate 6-reductaseGO:0050088

REACTIONREACTION DIAGRAMCOMMENTARYORGANISM UNIPROT ACCESSION NO.LITERATURE
D-mannitol 1-phosphate + NADP+ = D-mannose 6-phosphate + NADPH + H+
show the reaction diagram
----
D-mannitol 1-phosphate + NADP+ = D-mannose 6-phosphate + NADPH + H+
show the reaction diagram
-Orobanche ramosa-348008

REACTION TYPEORGANISM UNIPROT ACCESSION NO.COMMENTARYLITERATURE
oxidation----
redox reaction----
reduction----

PATHWAYKEGG LinkMetaCyc Link
mannitol biosynthesis-PWY-3881

SYSTEMATIC NAMEIUBMB Comments
D-mannitol-1-phosphate:NADP+ 6-oxidoreductaseInvolved in the biosynthesis of mannitol in celery (Apium graveolens) leaves.

SYNONYMSORGANISM UNIPROT ACCESSION NO.COMMENTARYLITERATURE
6-phosphomannose reductase----
M6PR----
M6PROrobanche ramosa--348008
M6PRApium graveolens--656972
M6PROrobanche aegyptiaca--700701
mannose 6-phosphate reductaseOrobanche ramosa--348008
mannose 6-phosphate reductaseApium graveolens--656972
mannose 6-phosphate reductaseOrobanche aegyptiaca--700701
mannose-6-phosphate reductase----
NADP-dependent mannose-6-P:mannitol-1-P oxidoreductase----
NADPH-dependent M6P reductase----
NADPH-dependent mannose 6-phosphate reductase----
NADPH-mannose-6-P reductase----

CAS REGISTRY NUMBERCOMMENTARY
88747-79-9-

ORGANISMCOMMENTARYLITERATURESEQUENCE CODESEQUENCE DB SOURCE
Apium graveolens-686908, 713260--Manually annotated by BRENDA team
Apium graveolenscelery656972, 94715--Manually annotated by BRENDA team
Apium graveolenscelery; cv. dulce348003--Manually annotated by BRENDA team
Apium graveolenscelery; cv. Giant Pascal348002, 348004, 348005--Manually annotated by BRENDA team
Ligustrum vulgareprivet348002--Manually annotated by BRENDA team
no activity in Arabidopsis thaliana-656972--Manually annotated by BRENDA team
Orobanche aegyptiaca-700701--Manually annotated by BRENDA team
Orobanche ramosabroomrape348006, 348007--Manually annotated by BRENDA team
Orobanche ramosabroomrape; parasitic broomrape on tomato roots348008--Manually annotated by BRENDA team
Striga hermonthicawitchweed348006--Manually annotated by BRENDA team

GENERAL INFORMATIONORGANISM UNIPROT ACCESSION NO.COMMENTARYLITERATURE
No entries in this field

SUBSTRATEPRODUCT                      REACTION DIAGRAMORGANISM UNIPROT ACCESSION NO. COMMENTARY/
Substrate
LITERATURE/
Substrate
COMMENTARY/
Product
LITERATURE/
Product
Reversibility
r=reversible
ir=irreversible
?=not specified
2-deoxy-D-glucose 6-phosphate + NADPH?
show the reaction diagram
Orobanche ramosa--348007--?
D-mannitol 1-phosphate + NADP+D-mannose 6-phosphate + NADPH + H+
show the reaction diagram
Orobanche ramosa-key enzyme in mannitol production in the parasite348008--?
D-mannose 6-phosphate + NADPH?
show the reaction diagram
Orobanche ramosa-key enzyme in mannitol production in higher plants348008---
D-mannose 6-phosphate + NADPH?
show the reaction diagram
Apium graveolens-involved in the biosynthesis of mannitol in celery (Apium graveolens) leaves94715---
D-mannose 6-phosphate + NADPHD-mannitol 1-phosphate + NADP+
show the reaction diagram
Apium graveolens--348003-348003-
D-mannose 6-phosphate + NADPHD-mannitol 1-phosphate + NADP+
show the reaction diagram
Apium graveolens--348005-348005-
D-mannose 6-phosphate + NADPHD-mannitol 1-phosphate + NADP+
show the reaction diagram
Apium graveolens--656972--?
D-mannose 6-phosphate + NADPHD-mannitol 1-phosphate + NADP+
show the reaction diagram
Apium graveolens--94715-94715r
D-mannose 6-phosphate + NADPHD-mannitol 1-phosphate + NADP+
show the reaction diagram
Apium graveolens--348002-348002r
D-mannose 6-phosphate + NADPHD-mannitol 1-phosphate + NADP+
show the reaction diagram
Striga hermonthica, Orobanche ramosa--348006-348006-
D-mannose 6-phosphate + NADPHD-mannitol 1-phosphate + NADP+
show the reaction diagram
Orobanche ramosa--348007-348007-
D-mannose 6-phosphate + NADPHD-mannitol 1-phosphate + NADP+
show the reaction diagram
Orobanche ramosa--348008-348008-
D-mannose 6-phosphate + NADPHD-mannitol 1-phosphate + NADP+
show the reaction diagram
Ligustrum vulgare-no activity with D-fructose 6-phosphate, D-glucose 6-phosphate, D-fructose 1-phosphate, D-mannose 1-phosphate, D-mannose348002-348002r
D-mannose 6-phosphate + NADPH + H+D-mannitol 1-phosphate + NADP+
show the reaction diagram
Orobanche aegyptiaca--700701--?

NATURAL SUBSTRATESNATURAL PRODUCTSREACTION DIAGRAMORGANISM UNIPROT ACCESSION NO.COMMENTARY SUBSTRATELITERATURE
(Substrate)
COMMENTARY PRODUCTLITERATURE
(Product)
D-mannitol 1-phosphate + NADP+D-mannose 6-phosphate + NADPH + H+
show the reaction diagram
Orobanche ramosa-key enzyme in mannitol production in the parasite348008--
D-mannose 6-phosphate + NADPH?
show the reaction diagram
Orobanche ramosa-key enzyme in mannitol production in higher plants348008--
D-mannose 6-phosphate + NADPH?
show the reaction diagram
Apium graveolens-involved in the biosynthesis of mannitol in celery (Apium graveolens) leaves94715--
D-mannose 6-phosphate + NADPHD-mannitol 1-phosphate + NADP+
show the reaction diagram
Apium graveolens--656972--

COFACTORORGANISM UNIPROT ACCESSION NO.COMMENTARYLITERATUREIMAGE
NADHOrobanche ramosa-5% activity compared to NADPH348006 2D-image
NADHStriga hermonthica-10% of activity compared to NADPH348006 2D-image
NADP+Apium graveolens, Ligustrum vulgare-NAD+ partially (8% activity) substitutes for NADP+ in oxidizing mannitol 1-phosphate348002 2D-image
NADP+Orobanche ramosa--348008 2D-image
NADPHApium graveolens, Ligustrum vulgare-NADH cannot replace NADPH in reducing mannose 6-phosphate348002 2D-image
NADPHApium graveolens--348003, 348005, 94715 2D-image
NADPHOrobanche ramosa--348006, 348007, 348008 2D-image
NADPHStriga hermonthica--348006 2D-image

METALS and IONS ORGANISM UNIPROT ACCESSION NO.COMMENTARY LITERATURE
No entries in this field

INHIBITORSORGANISM UNIPROT ACCESSION NO. COMMENTARY LITERATURE IMAGE
NaClApium graveolens-47% reduction by 100 mM348002 2D-image
siRNAOrobanche aegyptiaca-transformed tomato plants containing siRNA from the M6PR of Orobanche aegyptiaca show normal growth and development, accumulation of M6PR siRNA in transgenic tomatoes correlates with decreased levels of M6PR mRNA. Amount of endogenous M6PR mRNA in the tubercles and underground shoots of Orobanche aegyptiaca grown on transgenic host plants is reduced by 60%-80%. Concomitant with M6PR mRNA suppression, there is a significant decrease in mannitol level and a significant increase in the percentage of dead Orobanche aegyptiaca tubercles on the transgenic host plants. Detection of mir390, which is involved with cytoplasmic dsRNA processing, indicates to the existence of gene-silencing mechanisms in Orobanche spp. Gene silencing mechanisms are probably involved with the production of decreased levels of M6PR mRNA in the parasites grown on the transformed tomato lines700701-
additional informationOrobanche ramosa-overview over substrate and product analogues348007-

ACTIVATING COMPOUNDORGANISM UNIPROT ACCESSION NO. COMMENTARY LITERATURE IMAGE
No entries in this field

KM VALUE [mM]KM VALUE [mM] MaximumSUBSTRATEORGANISM UNIPROT ACCESSION NO. COMMENTARY LITERATURE IMAGE
45-D-mannitol 1-phosphateApium graveolens--348002 2D-image
5.9-D-mannose 6-phosphateStriga hermonthica-enzyme purified from leaves348006 2D-image
8.6-D-mannose 6-phosphateOrobanche ramosa-enzyme purified from flowering spikes348006 2D-image
10.1-D-mannose 6-phosphateApium graveolens-recombinant enzyme348005 2D-image
13.6-D-mannose 6-phosphateApium graveolens-enzyme purified from leaves348005 2D-image
15.8-D-mannose 6-phosphateApium graveolens--348002 2D-image
0.0021-NADPHApium graveolens-enzyme purified from leaves348005 2D-image
0.0062-NADPHApium graveolens-recombinant enzyme348005 2D-image
0.0102-NADPHStriga hermonthica-enzyme purified from leaves348006 2D-image
0.0698-NADPHOrobanche ramosa-enzyme purified from flowering spikes348006 2D-image

TURNOVER NUMBER [1/s] TURNOVER NUMBER MAXIMUM[1/s] SUBSTRATEORGANISM UNIPROT ACCESSION NO. COMMENTARY LITERATURE IMAGE
No entries in this field

kcat/KM VALUE [1/mMs-1]kcat/KM VALUE [1/mMs-1] MaximumSUBSTRATEORGANISM UNIPROT ACCESSION NO. COMMENTARY LITERATURE IMAGE
No entries in this field

Ki VALUE [mM]Ki VALUE [mM] MaximumINHIBITORORGANISM UNIPROT ACCESSION NO. COMMENTARY LITERATURE IMAGE
No entries in this field

IC50 VALUE [mM]IC50 VALUE [mM] MaximumINHIBITORORGANISM UNIPROT ACCESSION NO. COMMENTARY LITERATURE IMAGE
No entries in this field

SPECIFIC ACTIVITY [µmol/min/mg] SPECIFIC ACTIVITY MAXIMUM ORGANISM UNIPROT ACCESSION NO. COMMENTARY LITERATURE
0.008-Striga hermonthica-crude extract from mature leaves348006
0.00822-Orobanche ramosa-crude extract from expression in Escherichia coli348008
0.014-Orobanche ramosa-crude extract from flowering spikes348006
0.053-Apium graveolens--348002
0.12-Orobanche ramosa-in tubercle348008
3.76-Apium graveolens-purified from leaves348002
3.93-Apium graveolens-purified recombinant enzyme348005
additional information-Apium graveolens-measurement of activity during leaf development348005
additional information-Orobanche ramosa-measurement of activity during plant development348008
additional information-Apium graveolens-16.4 micromol per mg chorophyll and h in protoplast extract, 35.9 micromol per mg chorophyll and h in whole leaf extract94715

pH OPTIMUMpH MAXIMUMORGANISM UNIPROT ACCESSION NO. COMMENTARYLITERATURE
7-Orobanche ramosa, Striga hermonthica--348006
7.5-Apium graveolens-D-mannose 6-phosphate348002
8.5-Apium graveolens-D-mannitol 1-phosphate348002

pH RANGEpH RANGE MAXIMUMORGANISM UNIPROT ACCESSION NO.COMMENTARYLITERATURE
69Apium graveolens-inactivated at pH below 6348002

TEMPERATURE OPTIMUMTEMPERATURE OPTIMUM MAXIMUMORGANISM UNIPROT ACCESSION NO.COMMENTARYLITERATURE
25-Apium graveolens-assay at94715
35-Striga hermonthica--348006
45-Orobanche ramosa--348006

TEMPERATURE RANGE TEMPERATURE MAXIMUM ORGANISM UNIPROT ACCESSION NO. COMMENTARY LITERATURE
2545Striga hermonthica-75% of maximal activity348006

pI VALUEpI VALUE MAXIMUMORGANISM UNIPROT ACCESSION NO.COMMENTARYLITERATURE
No entries in this field

SOURCE TISSUE ORGANISM UNIPROT ACCESSION NO. COMMENTARY LITERATURE SOURCE
bundle sheathApium graveolens-by immunocytochemistry348004Manually annotated by BRENDA team
cotyledonApium graveolens-21-d old, low activity348005Manually annotated by BRENDA team
flowerApium graveolens-low activity348005Manually annotated by BRENDA team
leafApium graveolens--348002, 348004, 348005, 94715Manually annotated by BRENDA team
leafApium graveolens-mature leaf348003Manually annotated by BRENDA team
leafStriga hermonthica--348006Manually annotated by BRENDA team
rootOrobanche ramosa--348008Manually annotated by BRENDA team
seedOrobanche ramosa--348008Manually annotated by BRENDA team
shootLigustrum vulgare--348002Manually annotated by BRENDA team
shootOrobanche ramosa--348008Manually annotated by BRENDA team
shootOrobanche aegyptiaca-underground700701Manually annotated by BRENDA team
spikeOrobanche ramosa-flowering348006, 348007Manually annotated by BRENDA team
tubercleOrobanche aegyptiaca--700701Manually annotated by BRENDA team
mesophyllApium graveolens-by immunocytochemistry348004Manually annotated by BRENDA team
additional informationApium graveolens-no activity in sink tissue, i.e. young root, young petiole, young leaf and mature petiole348003, 348005Manually annotated by BRENDA team
additional informationOrobanche ramosa-constitutive gene expression during different developmental stages, e.g. germination and procaulome growth, of the parasite attached to tomato roots, high activity during tubercle enlargement and crown root formation; overview over different developmental stages348008Manually annotated by BRENDA team

LOCALIZATION ORGANISM UNIPROT ACCESSION NO. COMMENTARY GeneOntology No. LITERATURE SOURCE
cytoplasmApium graveolens, Ligustrum vulgare--5737348002Manually annotated by BRENDA team
cytoplasmApium graveolens-by immunocytochemistry5737348004Manually annotated by BRENDA team
cytoplasmApium graveolens-by differential and sucrose density gradient centrifugation573794715Manually annotated by BRENDA team
nucleusApium graveolens-by immunocytochemistry5634348004Manually annotated by BRENDA team
protoplastApium graveolens---348002, 94715Manually annotated by BRENDA team
protoplastLigustrum vulgare---348002Manually annotated by BRENDA team

PDBSCOPCATHORGANISM
No entries in this field

MOLECULAR WEIGHT MOLECULAR WEIGHT MAXIMUM ORGANISM UNIPROT ACCESSION NO. COMMENTARY LITERATURE
27000-Orobanche ramosa-gel filtration with Sephacryl S-200348006
33000-Striga hermonthica-gel filtration with Sephacryl S-200348006
35000-Orobanche ramosa-theoretical molecular weight, calculated from cDNA sequence348008
53000-Apium graveolens-gel filtration with Superose 12348002
58000-Apium graveolens-gel filtration with Sephacryl S-200348002

SUBUNITS ORGANISM UNIPROT ACCESSION NO. COMMENTARY LITERATURE
dimerApium graveolens-2 * 35000, SDS-PAGE348002
dimerApium graveolens-2 * 35000, calculated from cDNA sequence348005
monomerOrobanche ramosa, Striga hermonthica-1* 39000, SDS-PAGE348006
monomerOrobanche ramosa-1 * 37000, SDS-PAGE of recombinant enzyme348008

POSTTRANSLATIONAL MODIFICATION ORGANISM UNIPROT ACCESSION NO. COMMENTARY LITERATURE
No entries in this field

Crystallization/COMMENTARY ORGANISM UNIPROT ACCESSION NO. LITERATURE
No entries in this field

pH STABILITYpH STABILITY MAXIMUM ORGANISM UNIPROT ACCESSION NO. COMMENTARY LITERATURE
69Apium graveolens--348002
additional information-Orobanche ramosa, Striga hermonthica-rapid decrease in the range of basic pH values348006

TEMPERATURE STABILITYTEMPERATURE STABILITY MAXIMUM ORGANISM UNIPROT ACCESSION NO. COMMENTARYLITERATURE
No entries in this field

GENERAL STABILITYORGANISM UNIPROT ACCESSION NO.LITERATURE
degassed buffers stabilizeApium graveolens-348002
DTT stabilizesApium graveolens-348002

ORGANIC SOLVENT ORGANISM UNIPROT ACCESSION NO. COMMENTARY LITERATURE
No entries in this field

OXIDATION STABILITY ORGANISM UNIPROT ACCESSION NO. LITERATURE
DTT stabilizesApium graveolens-348002

STORAGE STABILITY ORGANISM UNIPROT ACCESSION NO. LITERATURE
-21°C, 50% activity retained after 1 monthApium graveolens-348002
4°C, lyophilized active fractions stable for several monthsApium graveolens-348002

Purification/COMMENTARY ORGANISM UNIPROT ACCESSION NO. LITERATURE
-Apium graveolens-348002, 94715
purification of recombinant enzymeApium graveolens-348005
-Orobanche ramosa-348006
purification of recombinant enzymeOrobanche ramosa-348008
-Striga hermonthica-348006

Cloned/COMMENTARY ORGANISM UNIPROT ACCESSION NO. LITERATURE
-Apium graveolens-348005, 656972
expression in Arabidopsis thalianaApium graveolens-686908
transgenic tomato plants bearing a gene construct containing a specific 277-bp fragment from M6PR-mRNA, in an inverted-repeat configuration. Eight independent lines containing the M6PR-silencing inverted-repeat construct pBin-IR-M6PR construct are regeneratedOrobanche aegyptiaca-700701
; single gene, constitutive, DNA sequence determination and analysis, expression in Escherichia coliOrobanche ramosa-348008

EXPRESSION ORGANISM UNIPROT ACCESSION NO. LITERATURE
No entries in this field

ENGINEERINGORGANISM UNIPROT ACCESSION NO.COMMENTARYLITERATURE
additional informationApium graveolens-recombinant expression under control of the CaMV35S promotor in transgenic Arabidopsis thaliana cv. LB4404 plants induces de novo mannitol and glucose-mannitol production and enhances salt tolerance in the transgenic plants, cytoplasmic localization of the recombinant enzyme, overview656972
additional informationApium graveolens-expression of mannose 6-phosphate 6-reductase in Arabidopsis thaliana results in mannitol producing plants that grow normally in the absence of stress, but show enhanced tolerance to presence of 0.1 or 0.2 mM NaCl than wild-type686908

Renatured/COMMENTARYORGANISM UNIPROT ACCESSION NO.LITERATURE
No entries in this field

APPLICATIONORGANISM UNIPROT ACCESSION NO.COMMENTARYLITERATURE
agricultureApium graveolens-transformation of mannose-6-phosphate reductase gene into Arabidopsis and tobacco using Agrobacterium tumefaciens-mediated transformation. Mannose-6-phosphate reductase can act as a selectable marker gene in either a positive or a negative selection mode depending on the plant species. On medium containing 2 g/l mannose, transgenic seeds germinate, whereas wild type seeds did not. Mannose at 30 g/l blanches leaf explants from all 29 transgenic tobacco events with mannose-6-phosphate reductase. In contrast, 30 g/l mannose does not inhibit shoot regeneration from leaf explants of wild-type or transgenic plants with either an antisense mannose-6-phosphate reductase or a plasmid control. Mannose at 30 g/l inhibits seed germination of transgenic tobacco seeds with mannose-6-phosphate reductase but not that of wild-type or transgenic tobacco with either the antisense mannose-6-phosphate reductase or the plasmid control713260
agricultureOrobanche ramosa-enzyme is a target for herbizide treatment348008

REF. AUTHORS TITLE JOURNAL VOL. PAGES YEAR ORGANISMLINK TO PUBMEDSOURCE
94715Rumpho, M.E.; Edwards, G.E.; Loescher, W.H.A pathway for photosynthetic carbon flow to mannitol in celery leavesPlant Physiol.73869-8731983Apium graveolens PubMed
348002Loescher, W.H.; Tyson, R.H.; Everard, J.D.; Redgewell, J.; Bieleski, R.L.Mannitol synthesis in higher plants. Evidence for the role and characterization of a NADPH-dependent mannose 6-phosphate reductasePlant Physiol.981396-14021992Apium graveolens, Ligustrum vulgare PubMed
348003Stoop, J.M.H.; Pharr, D.M.Mannitol metabolism in celery stressed by excess macronutrientsPlant Physiol.106503-5111994Apium graveolens PubMed
348004Everard, J.D.; Franceschi, V.R.; Loescher, W.H.Mannose-6-phosphate reductase, a key enzyme in photoassimilate partitioning, is abundant and located in the cytosol of photosynthetically active cells of celery (Apium graveolens L.) source leavesPlant Physiol.102345-3561993Apium graveolens PubMed
348005Everard, J.D.; Cantini, C.; Grumet, R.; Plummer, J.; Loescher, W.H.Molecular cloning of mannose-6-phosphate reductase and its developmental expression in celeryPlant Physiol.1131427-14351997Apium graveolens PubMed
348006Robert, S.; Simier, P.; Fer, A.Purification and characterization of mannose 6-phosphate reductase, a potential target for the control of Striga hermonthica and Orobanche ramosaAust. J. Plant Physiol.26233-2371999Orobanche ramosa, Striga hermonthica-
348007Robert, S.; Dubreuil, D.; Simier, P.; Pradere, J.P.; Fer, A.Inhibition studies on mannose 6-phosphate reductase purified from Orobanche ramosaCarbohydr. Lett.3231-2381999Orobanche ramosa-
348008Delavault, P.; Simier, P.; Thoiron, S.; Veronesi, C.; Fer, A.; Thalouarn, P.Isolation of mannose 6-phosphate reductase cDNA, changes in enzyme activity and mannitol content in broomrape (Orobanche ramosa) parasitic on tomato rootsPhysiol. Plant.11548-552002Orobanche ramosa PubMed
656972Zhifang, G.; Loescher, W.H.Expression of a celery mannose 6-phosphate reductase in Arabidopsis thaliana enhances salt tolerance and induces biosynthesis of both mannitol and a glucosyl-mannitol dimerPlant Cell Environ.26275-2832003Apium graveolens, no activity in Arabidopsis thaliana-
686908Sickler, C.M.; Edwards, G.E.; Kiirats, O.; Gao, Z.; Loescher, W.Response of mannitol-producing Arabidopsis thaliana to abiotic stressFunct. Plant Biol.34382-3912007Apium graveolens-
700701Aly, R.; Cholakh, H.; Joel, D.M.; Leibman, D.; Steinitz, B.; Zelcer, A.; Naglis, A.; Yarden, O.; Gal-On, A.Gene silencing of mannose 6-phosphate reductase in the parasitic weed Orobanche aegyptiaca through the production of homologous dsRNA sequences in the host plantPlant Biotechnol. J.7487-4982009Orobanche aegyptiaca PubMed
713260Song, G.Q.; Sink, K.C.; Ma, Y.; Herlache, T.; Hancock, J.F.; Loescher, W.H.A novel mannose-based selection system for plant transformation using celery mannose-6-phosphate reductase genePlant Cell Rep.29163-1722010Apium graveolens PubMed

LINKS TO OTHER DATABASES (specific for EC-Number 1.1.1.224)
ExplorEnz
ExPASy
KEGG
MetaCyc
NCBI: PubMed, Protein, Nucleotide, Structure, Genome, OMIM
IUBMB Enzyme Nomenclature
PROSITE Database of protein families and domains
SYSTERS
Protein Mutant Database
InterPro (database of protein families, domains and functional sites)