5t7l

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<StructureSection load='5t7l' size='340' side='right'caption='[[5t7l]], [[Resolution|resolution]] 2.83&Aring;' scene=''>
<StructureSection load='5t7l' size='340' side='right'caption='[[5t7l]], [[Resolution|resolution]] 2.83&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[5t7l]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5T7L OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=5T7L FirstGlance]. <br>
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<table><tr><td colspan='2'>[[5t7l]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5T7L OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5T7L FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CU:COPPER+(II)+ION'>CU</scene>, <scene name='pdbligand=PT:PLATINUM+(II)+ION'>PT</scene></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.83&#8491;</td></tr>
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<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ATOX1, HAH1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN]), ATP7A, MC1, MNK ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CU:COPPER+(II)+ION'>CU</scene>, <scene name='pdbligand=PT:PLATINUM+(II)+ION'>PT</scene></td></tr>
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<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Cu(+)_exporting_ATPase Cu(+) exporting ATPase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.3.54 3.6.3.54] </span></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=5t7l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5t7l OCA], [https://pdbe.org/5t7l PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5t7l RCSB], [https://www.ebi.ac.uk/pdbsum/5t7l PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5t7l ProSAT]</span></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=5t7l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5t7l OCA], [http://pdbe.org/5t7l PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5t7l RCSB], [http://www.ebi.ac.uk/pdbsum/5t7l PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5t7l ProSAT]</span></td></tr>
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</table>
</table>
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== Disease ==
 
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[[http://www.uniprot.org/uniprot/ATP7A_HUMAN ATP7A_HUMAN]] Defects in ATP7A are the cause of Menkes disease (MNKD) [MIM:[http://omim.org/entry/309400 309400]]; also known as kinky hair disease. MNKD is an X-linked recessive disorder of copper metabolism characterized by generalized copper deficiency. MNKD results in progressive neurodegeneration and connective-tissue disturbances: focal cerebral and cerebellar degeneration, early growth retardation, peculiar hair, hypopigmentation, cutis laxa, vascular complications and death in early childhood. The clinical features result from the dysfunction of several copper-dependent enzymes.<ref>PMID:10079817</ref> <ref>PMID:7977350</ref> <ref>PMID:8981948</ref> <ref>PMID:10401004</ref> <ref>PMID:10319589</ref> <ref>PMID:11241493</ref> <ref>PMID:11350187</ref> <ref>PMID:15981243</ref> <ref>PMID:22992316</ref> Defects in ATP7A are the cause of occipital horn syndrome (OHS) [MIM:[http://omim.org/entry/304150 304150]]; also known as X-linked cutis laxa. OHS is an X-linked recessive disorder of copper metabolism. Common features are unusual facial appearance, skeletal abnormalities, chronic diarrhea and genitourinary defects. The skeletal abnormalities included occipital horns, short, broad clavicles, deformed radii, ulnae and humeri, narrowing of the rib cage, undercalcified long bones with thin cortical walls and coxa valga.<ref>PMID:9246006</ref> <ref>PMID:17108763</ref> Defects in ATP7A are a cause of distal spinal muscular atrophy X-linked type 3 (DSMAX3) [MIM:[http://omim.org/entry/300489 300489]]. DSMAX3 is a neuromuscular disorder. Distal spinal muscular atrophy, also known as distal hereditary motor neuronopathy, represents a heterogeneous group of neuromuscular disorders caused by selective degeneration of motor neurons in the anterior horn of the spinal cord, without sensory deficit in the posterior horn. The overall clinical picture consists of a classical distal muscular atrophy syndrome in the legs without clinical sensory loss. The disease starts with weakness and wasting of distal muscles of the anterior tibial and peroneal compartments of the legs. Later on, weakness and atrophy may expand to the proximal muscles of the lower limbs and/or to the distal upper limbs.<ref>PMID:20170900</ref>
 
== Function ==
== Function ==
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[[http://www.uniprot.org/uniprot/ATOX1_HUMAN ATOX1_HUMAN]] Binds and deliver cytosolic copper to the copper ATPase proteins. May be important in cellular antioxidant defense. [[http://www.uniprot.org/uniprot/ATP7A_HUMAN ATP7A_HUMAN]] May supply copper to copper-requiring proteins within the secretory pathway, when localized in the trans-Golgi network. Under conditions of elevated extracellular copper, it relocalized to the plasma membrane where it functions in the efflux of copper from cells.
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[https://www.uniprot.org/uniprot/ATOX1_HUMAN ATOX1_HUMAN] Binds and deliver cytosolic copper to the copper ATPase proteins. May be important in cellular antioxidant defense.
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Copper (Cu) is required for maturation of cuproenzymes, cell proliferation, and angiogenesis, and its transport entails highly specific protein-protein interactions. In humans, the Cu chaperone Atox1 mediates Cu(I) delivery to P-type ATPases Atp7a and Atp7b (the Menkes and Wilson disease proteins, respectively), which are responsible for Cu release to the secretory pathway and excess Cu efflux. Cu(I) handover is believed to occur through the formation of three-coordinate intermediates where the metal ion is simultaneously linked to Atox1 and to a soluble domain of Cu-ATPases, both sharing a CxxC dithiol motif. The ultrahigh thermodynamic stability of chelating S-donor ligands secures the redox-active and potentially toxic Cu(I) ion, while their kinetic lability allows facile metal transfer. The same CxxC motifs can interact with and mediate the biological response to antitumor platinum drugs, which are among the most used chemotherapeutics. We show that cisplatin and an oxaliplatin analogue can specifically bind to the heterodimeric complex Atox1-Cu(I)-Mnk1 (Mnk1 is the first soluble domain of Atp7a), thus leading to a kinetically stable adduct that has been structurally characterized by solution NMR and X-ray crystallography. Of the two possible binding configurations of the Cu(I) ion in the cage made by the CxxC motifs of the two proteins, one (bidentate Atox1 and monodentate Mnk1) is less stable and more reactive toward cis-Pt(II) compounds, as shown by using mutated proteins. A Cu(I) ion can be retained at the Pt(II) coordination site but can be released to glutathione (a physiological thiol) or to other complexing agents. The Pt(II)-supported heterodimeric complex does not form if Zn(II) is used in place of Cu(I) and transplatin instead of cisplatin. The results indicate that Pt(II) drugs can specifically affect Cu(I) homeostasis by interfering with the rapid exchange of Cu(I) between Atox1 and Cu-ATPases with consequences on cancer cell viability and migration.
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Mechanistic and Structural Basis for Inhibition of Copper Trafficking by Platinum Anticancer Drugs.,Lasorsa A, Nardella MI, Rosato A, Mirabelli V, Caliandro R, Caliandro R, Natile G, Arnesano F J Am Chem Soc. 2019 Jul 31;141(30):12109-12120. doi: 10.1021/jacs.9b05550. Epub, 2019 Jul 19. PMID:31283225<ref>PMID:31283225</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 5t7l" style="background-color:#fffaf0;"></div>
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==See Also==
==See Also==
*[[ATPase 3D structures|ATPase 3D structures]]
*[[ATPase 3D structures|ATPase 3D structures]]
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== References ==
 
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<references/>
 
__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: Human]]
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[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Large Structures]]
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[[Category: Arnesano, F]]
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[[Category: Arnesano F]]
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[[Category: Caliandro, R]]
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[[Category: Caliandro R]]
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[[Category: Galliani, A]]
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[[Category: Galliani A]]
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[[Category: Lasorsa, A]]
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[[Category: Lasorsa A]]
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[[Category: Mirabelli, V]]
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[[Category: Mirabelli V]]
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[[Category: Natile, G]]
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[[Category: Natile G]]
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[[Category: Rosato, A]]
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[[Category: Rosato A]]
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[[Category: Atox1-mnk1]]
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[[Category: Heterodimer]]
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[[Category: Pt-binding]]
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[[Category: Transport protein]]
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Current revision

Pt(II)-mediated copper-dependent interactions between ATOX1 and MNK1

PDB ID 5t7l

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