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Literature summary for 1.16.1.7 extracted from

  • Siso-Terraza, P.; Rios, J.J.; Abadia, J.; Abadia, A.; Alvarez-Fernandez, A.
    Flavins secreted by roots of iron-deficient Beta vulgaris enable mining of ferric oxide via reductive mechanisms (2016), New Phytol., 209, 733-745 .
    View publication on PubMed
Search for more literature for 1.16.1.7

Activating Compound

Activating Compound Comment Organism Structure
additional information root FCR activity increases two-fold with Fe deficiency, no effect of flavin on enzyme activity Beta vulgaris
riboflavin 3'-sulfate The flavin isolate consists of 46% riboflavin 3'-sulfate and 54% riboflavin 5'-sulfate. Increases the enzyme activity in roots and the reduction of Fe3+-oxide Beta vulgaris
riboflavin 5'-sulfate The flavin isolate consists of 46% riboflavin 3'-sulfate and 54% riboflavin 5'-sulfate. Increases the enzyme activity in roots and the reduction of Fe3+-oxide Beta vulgaris

Inhibitors

Inhibitors Comment Organism Structure
additional information no effect of flavin on enzyme activity Beta vulgaris

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
2 Fe(III)-siderophore + NADH Beta vulgaris
-
 2 Fe(II)-siderophore + NAD+ + H+
-
 ?

Organism

Organism UniProt Comment Textmining
Beta vulgaris
-
 cv. Orbis
-

Source Tissue

Source Tissue Comment Organism Textmining
root
-
 Beta vulgaris
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2 Fe(III)-siderophore + NADH
-
 Beta vulgaris 2 Fe(II)-siderophore + NAD+ + H+
-
 ?
additional information root Fe(III) reductase activity is measured by the Fe(II) bathophenanthrolinedisulphonate (BPDS) method, using whole roots of intact plants and excised root sections, and either Fe(III)-EDTA or a poorly crystalline Fe(III)-oxide as substrate Beta vulgaris ?
-
 ?

Synonyms

Synonyms Comment Organism
FCR
-
 Beta vulgaris
Fe(III) chelate reductase
-
 Beta vulgaris
Fe(III) reductase
-
 Beta vulgaris
FRO2
-
 Beta vulgaris
root Fe(III) reductase
-
 Beta vulgaris

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
6
-
 assay at Beta vulgaris

Cofactor

Cofactor Comment Organism Structure
NADH
-
 Beta vulgaris

General Information

General Information Comment Organism
physiological function iron (Fe) is abundant in soils but generally poorly soluble. Plants, with the exception of Graminaceae, take up Fe using an Fe(III)-chelate reductase coupled to an Fe(II) transporter. Beta vulgaris roots secrete flavins upon Fe deficiency, that are involved in Fe acquisition. Root-secretion of flavins improves Fe nutrition involving the reduction of soluble Fe(III) to Fe(II) by an Fe(III) chelate reductase (FCR). Flavin depletion does not affect the root proton extrusion and Fe(III)-chelate reductase activities of Fe-deficient plants. Plants respond to Fe deficiency by lowering the pH of the growth media and increasing the root Fe(III) reductase activity. Flavins allow Beta vulgaris plants to mine Fe from Fe(III)-oxides Beta vulgaris