View source for 9hmm


==Crystal structure of mouse ADAT2/ADAT3 tRNA deamination complex A180V mutant==
<StructureSection load='9hmm' size='340' side='right'caption='[[9hmm]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[9hmm]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9HMM OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9HMM FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.9&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BR:BROMIDE+ION'>BR</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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=9hmm FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9hmm OCA], [https://pdbe.org/9hmm PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9hmm RCSB], [https://www.ebi.ac.uk/pdbsum/9hmm PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9hmm ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ADAT2_MOUSE ADAT2_MOUSE] Probably participates in deamination of adenosine-34 to inosine in many tRNAs.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The ADAT2/ADAT3 (ADAT) complex catalyzes the adenosine to inosine modification at the wobble position of eukaryotic tRNAs. Mutations in ADAT3, the catalytically inactive subunit of the ADAT2/ADAT3 complex, have been identified in patients presenting with severe neurodevelopmental disorders. Yet, the physiological function of ADAT2/ADAT3 complex during brain development remains totally unknown. Here, we investigated the role of the ADAT2/ADAT3 complex in cortical development. First, we reported 21 neurodevelopmental disorders patients carrying biallelic variants in ADAT3. Second, we used structural, biochemical, and enzymatic assays to deeply characterize the impact of those variants on ADAT2/ADAT3 structure, biochemical properties, enzymatic activity and tRNAs editing and abundance. Finally, in vivo complementation assays were performed to correlate functional deficits with neuronal migration defects in the developing mouse cortex. Our results showed that maintaining a proper level of ADAT2/ADAT3 catalytic activity is essential for radial migration of projection neurons in the developing mouse cortex. We demonstrated that the identified ADAT3 variants significantly impaired the abundance and, for some, the activity of the complex, leading to a substantial decrease in I34 levels with direct consequence on their steady-state. We correlated the severity of the migration phenotype with the degree of the loss of function caused by the variants. Altogether, our results highlight the critical role of ADAT2/ADAT3 during cortical development and provide cellular and molecular insights into the pathogenic mechanisms underlying ADAT3-related neurodevelopmental disorders.

ADAT3 variants disrupt the activity of the ADAT tRNA deaminase complex and impair neuronal migration.,Del-Pozo-Rodriguez J, Tilly P, Lecat R, Vaca HR, Mosser L, Brivio E, Balla T, Gomes MV, Ramos-Morales E, Schwaller N, Salinas-Giege T, VanNoy G, England EM, Kern Lovgren A, O'Leary M, Chopra M, Ojeda NM, Toosi MB, Eslahi A, Alerasool M, Mojarrad M, Pais LS, Yeh RC, Gable DL, Hashem MO, Abdulwahab F, Rakiz Alqurashi M, Sbeih LZ, Adas Blanco OA, Khater RA, Oprea G, Rad A, Alzaidan H, Aldhalaan H, Tous E, Alsagheir A, Alowain M, Tamim A, Alfayez K, Alhashem A, Alnuzha A, Kamel M, Al-Awam BS, Elnaggar W, Almenabawy N, O'Donnell-Luria A, Neil JE, Gleeson JG, Walsh CA, Alkuraya FS, AlAbdi L, Elkhateeb N, Selim L, Srivastava S, Nedialkova DD, Drouard L, Romier C, Bayam E, Godin JD Brain. 2025 Mar 22:awaf109. doi: 10.1093/brain/awaf109. PMID:40120092<ref>PMID:40120092</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 9hmm" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Mus musculus]]
[[Category: Romier C]]
[[Category: Vaca HR]]