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4yvo
From Proteopedia
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== Function == | == Function == | ||
[[http://www.uniprot.org/uniprot/FLU_ARATH FLU_ARATH]] Negative regulator of tetrapyrrole biosynthesis (including chlorophyll) in chloroplasts, probably via HEMA1 repression. Inhibits especially the magnesium ion Mg(2+) branch of tetrapyrrole biosynthesis, but independently of heme.<ref>PMID:11606728</ref> <ref>PMID:14508004</ref> <ref>PMID:15584960</ref> <ref>PMID:18182022</ref> | [[http://www.uniprot.org/uniprot/FLU_ARATH FLU_ARATH]] Negative regulator of tetrapyrrole biosynthesis (including chlorophyll) in chloroplasts, probably via HEMA1 repression. Inhibits especially the magnesium ion Mg(2+) branch of tetrapyrrole biosynthesis, but independently of heme.<ref>PMID:11606728</ref> <ref>PMID:14508004</ref> <ref>PMID:15584960</ref> <ref>PMID:18182022</ref> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | The tetratricopeptide repeat (TPR)-containing protein FLU is a negative regulator of chlorophyll biosynthesis in plants. It directly interacts through its TPR domain with glutamyl-tRNA reductase (GluTR), the rate-limiting enzyme in the formation of delta-aminolevulinic acid (ALA). Delineation of how FLU binds to GluTR is important for understanding the molecular basis for FLU-mediated repression of synthesis of ALA, the universal tetrapyrrole precursor. Here, we characterize the FLU-GluTR interaction by solving the crystal structures of the uncomplexed TPR domain of FLU (FLU(TPR)) at 1.45-A resolution and the complex of the dimeric domain of GluTR bound to FLU(TPR) at 2.4-A resolution. Three non-canonical TPR motifs of each FLU(TPR) form a concave surface and clamp the helix bundle in the C-terminal dimeric domain of GluTR. We demonstrate that a 2:2 FLU(TPR)-GluTR complex is the functional unit for FLU-mediated GluTR regulation and suggest that the formation of the FLU-GluTR complex prevents glutamyl-tRNA, the GluTR substrate, from binding with this enzyme. These results also provide insights into the spatial regulation of ALA synthesis by the membrane-located FLU protein. | ||
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| + | The Non-canonical Tetratricopeptide Repeat (TPR) Domain of Fluorescent (FLU) Mediates Complex Formation with Glutamyl-tRNA Reductase.,Zhang M, Zhang F, Fang Y, Chen X, Chen Y, Zhang W, Dai HE, Lin R, Liu L J Biol Chem. 2015 Jul 10;290(28):17559-65. doi: 10.1074/jbc.M115.662981. Epub, 2015 Jun 2. PMID:26037924<ref>PMID:26037924</ref> | ||
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| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 08:26, 22 July 2015
Crystal Structure of the TPR Domain of Arabidopsis FLU (FLU-TPR)
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Categories: Liu, L | Zhang, F | Zhang, M | Chloroplast | Fluorescent protein | Tpr
