View source for 3jbx


==Cryo-electron microscopy structure of RAG Signal End Complex (C2 symmetry)==
<SX load='3jbx' size='340' side='right' viewer='molstar' caption='[[3jbx]], [[Resolution|resolution]] 3.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3jbx]] is a 12 chain structure with sequence from [https://en.wikipedia.org/wiki/Danio_rerio Danio rerio] 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=3JBX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3JBX 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]] 3.4&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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=3jbx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3jbx OCA], [https://pdbe.org/3jbx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3jbx RCSB], [https://www.ebi.ac.uk/pdbsum/3jbx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3jbx ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/RAG1_DANRE RAG1_DANRE] Catalytic component of the RAG complex, a multiprotein complex that mediates the DNA cleavage phase during V(D)J recombination. V(D)J recombination assembles a diverse repertoire of immunoglobulin and T-cell receptor genes in developing B and T lymphocytes through rearrangement of different V (variable), in some cases D (diversity), and J (joining) gene segments. In the RAG complex, RAG1 mediates the DNA-binding to the conserved recombination signal sequences (RSS) and catalyzes the DNA cleavage activities by introducing a double-strand break between the RSS and the adjacent coding segment. RAG2 is not a catalytic component but is required for all known catalytic activities. DNA cleavage occurs in 2 steps: a first nick is introduced in the top strand immediately upstream of the heptamer, generating a 3'-hydroxyl group that can attack the phosphodiester bond on the opposite strand in a direct transesterification reaction, thereby creating 4 DNA ends: 2 hairpin coding ends and 2 blunt, 5'-phosphorylated ends. In addition to its endonuclease activity, RAG1 also acts as a E3 ubiquitin-protein ligase that mediates monoubiquitination of histone H3. Histone H3 monoubiquitination is required for the joining step of V(D)J recombination (By similarity).

==See Also==
*[[Recombination-activating gene 3D structures|Recombination-activating gene 3D structures]]
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</SX>
[[Category: Danio rerio]]
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Chambers MG]]
[[Category: Fu T-M]]
[[Category: Liao M]]
[[Category: Ru H]]
[[Category: Tong AB]]
[[Category: Wu H]]