Enzymes
| UniProtKB help_outline | 1 proteins |
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- Name help_outline chlorophyllide a Identifier CHEBI:83348 Charge -2 Formula C35H32MgN4O5 InChIKeyhelp_outline IZOAGQOHKWGYKF-PVMVIUQGSA-K SMILEShelp_outline CCC1=C(C)C2=[N+]3C1=Cc1c(C)c4C(=O)[C-](C(=O)OC)C5=C6[C@@H](CCC([O-])=O)[C@H](C)C7=[N+]6[Mg--]3(n1c45)n1c(=C7)c(C)c(C=C)c1=C2 2D coordinates Mol file for the small molecule Search links Involved in 13 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline NADP+ Identifier CHEBI:58349 Charge -3 Formula C21H25N7O17P3 InChIKeyhelp_outline XJLXINKUBYWONI-NNYOXOHSSA-K SMILEShelp_outline NC(=O)c1ccc[n+](c1)[C@@H]1O[C@H](COP([O-])(=O)OP([O-])(=O)OC[C@H]2O[C@H]([C@H](OP([O-])([O-])=O)[C@@H]2O)n2cnc3c(N)ncnc23)[C@@H](O)[C@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 1,285 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline H+ Identifier CHEBI:15378 Charge 1 Formula H InChIKeyhelp_outline GPRLSGONYQIRFK-UHFFFAOYSA-N SMILEShelp_outline [H+] 2D coordinates Mol file for the small molecule Search links Involved in 9,431 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline NADPH Identifier CHEBI:57783 (Beilstein: 10411862) help_outline Charge -4 Formula C21H26N7O17P3 InChIKeyhelp_outline ACFIXJIJDZMPPO-NNYOXOHSSA-J SMILEShelp_outline NC(=O)C1=CN(C=CC1)[C@@H]1O[C@H](COP([O-])(=O)OP([O-])(=O)OC[C@H]2O[C@H]([C@H](OP([O-])([O-])=O)[C@@H]2O)n2cnc3c(N)ncnc23)[C@@H](O)[C@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 1,279 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline protochlorophyllide a Identifier CHEBI:83350 Charge -2 Formula C35H30MgN4O5 InChIKeyhelp_outline SSIKFLKOTZKJAG-UAVVDGTISA-K SMILEShelp_outline CCC1=C(C)C2=[N+]3C1=Cc1c(C)c4C(=O)[C-](C(=O)OC)C5=C6C(CCC([O-])=O)=C(C)C7=[N+]6[Mg--]3(n1c45)n1c(=C7)c(C)c(C=C)c1=C2 2D coordinates Mol file for the small molecule Search links Involved in 5 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:11132 | RHEA:11133 | RHEA:11134 | RHEA:11135 | |
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| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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Publications
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The protochlorophyllide holochrome of barley (Hordeum vulgare L.). Isolation and characterization of the NADPH:protochlorophyllide oxidoreductase.
Apel K., Santel H.J., Redlinger T.E., Falk H.
The NADPH:protochlorophyllide oxidoreductase of barley has been solubilized from etioplast membranes and purified to apparent homogeneity. The highest specific activity measured for the purified enzyme was 1.6 nmol chlorophyllide formed (mg protein-1) per flash. Electrophoretic analysis of the pur ... >> More
The NADPH:protochlorophyllide oxidoreductase of barley has been solubilized from etioplast membranes and purified to apparent homogeneity. The highest specific activity measured for the purified enzyme was 1.6 nmol chlorophyllide formed (mg protein-1) per flash. Electrophoretic analysis of the purified enzyme on sodium dodecylsulfate/polyacrylamide gels revealed only one polypeptide of Mr 36000. Durig glycerol gradient centrifugation the enzyme migrates as a low-molecular-weight component. It is proposed that each enzyme molecule contains only one polypeptide chain. Assuming a molecular weight of 36000 for the enzyme, it was calculated that two or three protochlorophyllide molecules are bound to each enzyme molecule. << Less
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Reconstitution of chlorophyllide formation by isolated etioplast membranes.
Griffiths W.T.
1. The reconstitution of chlorophyllide biosynthesis by barley etioplast membranes is described. 2. The process is dependent on the additon of NADPH and protochlorophyllide and on illumination, which can be either continuous or intermittent. 3. The reconstituted process involves spectroscopically ... >> More
1. The reconstitution of chlorophyllide biosynthesis by barley etioplast membranes is described. 2. The process is dependent on the additon of NADPH and protochlorophyllide and on illumination, which can be either continuous or intermittent. 3. The reconstituted process involves spectroscopically similar intermediates to the native reaction in whole leaves. 4. Steps in the process are an initial enzymic formation in the dark of a photoactive complex, P638/652 (probably a ternary protochlorophyllide-NADPH-enzyme complex), followed by a very rapid light-dependent hydrogen transfer from the NADPH to the protochlorophyllide giving chlorophyllide giving chlorophyllide, finally releasing the enzyme for repeating the process. 5. A continuous assay for the system regenerating complex P638/652 was devised on the basis of monitoring chlorophyllide formation. 6. The pH optimum of the reaction is at 6.9 and Km values for protochlorophyllide and NADPH are 0.46 and 35 micron respectively. 7. The reaction is associated specifically with the etioplast membrane fraction. 8. Activities of the system assayed in vitro are more than adequate to account for rates of chlorophyll formation in vivo. << Less