8rmd

From Proteopedia

(Difference between revisions)

Current revision

Structure of the FDX2-bound core ISC complex (distal conformation)

Structural highlights

8rmd is a 9 chain structure with sequence from Escherichia coli BL21(DE3) and Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	Electron Microscopy, Resolution 2.52Å
Ligands:	, , ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

NFS1_HUMAN Severe neonatal lactic acidosis due to NFS1-ISD11 complex deficiency.

Function

NFS1_HUMAN Catalyzes the removal of elemental sulfur from cysteine to produce alanine. It supplies the inorganic sulfur for iron-sulfur (Fe-S) clusters. May be involved in the biosynthesis of molybdenum cofactor.^[1]

Publication Abstract from PubMed

Iron-sulfur (FeS) protein biogenesis in eukaryotes begins with the de novo assembly of [2Fe-2S] clusters by the mitochondrial core iron-sulfur cluster assembly (ISC) complex. This complex comprises the scaffold protein ISCU2, the cysteine desulfurase subcomplex NFS1-ISD11-ACP1, the allosteric activator frataxin (FXN) and the electron donor ferredoxin-2 (FDX2). The structural interaction of FDX2 with the complex remains unclear. Here, we present cryo-EM structures of the human FDX2-bound core ISC complex showing that FDX2 and FXN compete for overlapping binding sites. FDX2 binds in either a 'distal' conformation, where its helix F interacts electrostatically with an arginine patch of NFS1, or a 'proximal' conformation, where this interaction tightens and the FDX2-specific C terminus binds to NFS1, facilitating the movement of the [2Fe-2S] cluster of FDX2 closer to the ISCU2 FeS cluster assembly site for rapid electron transfer. Structure-based mutational studies verify the contact areas of FDX2 within the core ISC complex.

Two-stage binding of mitochondrial ferredoxin-2 to the core iron-sulfur cluster assembly complex.,Steinhilper R, Boss L, Freibert SA, Schulz V, Krapoth N, Kaltwasser S, Lill R, Murphy BJ Nat Commun. 2024 Dec 4;15(1):10559. doi: 10.1038/s41467-024-54585-4. PMID:39632806^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Marelja Z, Stocklein W, Nimtz M, Leimkuhler S. A novel role for human Nfs1 in the cytoplasm: Nfs1 acts as a sulfur donor for MOCS3, a protein involved in molybdenum cofactor biosynthesis. J Biol Chem. 2008 Sep 12;283(37):25178-85. doi: 10.1074/jbc.M804064200. Epub 2008, Jul 23. PMID:18650437 doi:http://dx.doi.org/10.1074/jbc.M804064200
↑ Steinhilper R, Boß L, Freibert SA, Schulz V, Krapoth N, Kaltwasser S, Lill R, Murphy BJ. Two-stage binding of mitochondrial ferredoxin-2 to the core iron-sulfur cluster assembly complex. Nat Commun. 2024 Dec 4;15(1):10559. PMID:39632806 doi:10.1038/s41467-024-54585-4

1 Structural highlights
2 Disease
3 Function
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/8rmd"

Categories: Homo sapiens | Large Structures | Murphy BJ | Steinhilper R

@@ Line 5: / Line 5: @@
 <table><tr><td colspan='2'>[[8rmd]] is a 9 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_BL21(DE3) Escherichia coli BL21(DE3)] and [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8RMD OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8RMD FirstGlance]. <br>
 </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 2.52&#8491;</td></tr>
-<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=8Q1:S-[2-({N-[(2R)-2-hydroxy-3,3-dimethyl-4-(phosphonooxy)butanoyl]-beta-alanyl}amino)ethyl]+dodecanethioate'>8Q1</scene>, <scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=FES:FE2/S2+(INORGANIC)+CLUSTER'>FES</scene>, <scene name='pdbligand=LLP:(2S)-2-AMINO-6-[[3-HYDROXY-2-METHYL-5-(PHOSPHONOOXYMETHYL)PYRIDIN-4-YL]METHYLIDENEAMINO]HEXANOIC+ACID'>LLP</scene></td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=8Q1:~{S}-[2-[3-[[(2~{R})-3,3-dimethyl-2-oxidanyl-4-phosphonooxy-butanoyl]amino]propanoylamino]ethyl]+dodecanethioate'>8Q1</scene>, <scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=FES:FE2/S2+(INORGANIC)+CLUSTER'>FES</scene>, <scene name='pdbligand=LLP:(2S)-2-AMINO-6-[[3-HYDROXY-2-METHYL-5-(PHOSPHONOOXYMETHYL)PYRIDIN-4-YL]METHYLIDENEAMINO]HEXANOIC+ACID'>LLP</scene></td></tr>
 <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=8rmd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8rmd OCA], [https://pdbe.org/8rmd PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8rmd RCSB], [https://www.ebi.ac.uk/pdbsum/8rmd PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8rmd ProSAT]</span></td></tr>
 </table>

8rmd

From Proteopedia

Current revision

Structure of the FDX2-bound core ISC complex (distal conformation)

Structural highlights

Disease

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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