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5d46

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Structural Basis for a New Templated Activity by Terminal Deoxynucleotidyl Transferase: Implications for V(D)J Recombination

Structural highlights

5d46 is a 5 chain structure with sequence from Mus musculus and Synthetic construct. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 2.8Å
Ligands:	, , , ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

TDT_MOUSE Template-independent DNA polymerase which catalyzes the random addition of deoxynucleoside 5'-triphosphate to the 3'-end of a DNA initiator. One of the in vivo functions of this enzyme is the addition of nucleotides at the junction (N region) of rearranged Ig heavy chain and T-cell receptor gene segments during the maturation of B- and T-cells.

Publication Abstract from PubMed

Eukaryotic DNA polymerase of the polX family, such as pol mu and terminal deoxynucleotidyl transferase (TdT), are key components of the non-homologous end-joining or V(D)J recombination machinery, respectively. The established role of TdT is to add random nucleotides during V(D)J recombination. Here we show that TdT also has a templated-polymerase activity, similar to pol mu, in the presence of higher concentrations of a downstream DNA duplex, and performs a micro-homology single base-pair search to align the DNA synapsis. To understand the molecular basis of this alignment, we solve crystal structures of TdT with four DNA strands and study the influence of the 3' protruding end. Two mutations in TdT inspired by sequence alignments with pol mu further improve the templated activity. We propose that both templated and untemplated activities of TdT are needed to explain the distributions of lengths of N regions observed experimentally in T cell receptors and antibodies.

Structural Basis for a New Templated Activity by Terminal Deoxynucleotidyl Transferase: Implications for V(D)J Recombination.,Loc'h J, Rosario S, Delarue M Structure. 2016 Sep 6;24(9):1452-1463. doi: 10.1016/j.str.2016.06.014. Epub 2016 , Aug 4. PMID:27499438^[1]

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

References

↑ Loc'h J, Rosario S, Delarue M. Structural Basis for a New Templated Activity by Terminal Deoxynucleotidyl Transferase: Implications for V(D)J Recombination. Structure. 2016 Sep 6;24(9):1452-1463. doi: 10.1016/j.str.2016.06.014. Epub 2016 , Aug 4. PMID:27499438 doi:http://dx.doi.org/10.1016/j.str.2016.06.014

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/5d46"

@@ Line 4: / Line 4: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[5d46]] is a 5 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5D46 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5D46 FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=POP:PYROPHOSPHATE+2-'>POP</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.8&#8491;</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=POP:PYROPHOSPHATE+2-'>POP</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=5d46 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5d46 OCA], [https://pdbe.org/5d46 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5d46 RCSB], [https://www.ebi.ac.uk/pdbsum/5d46 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5d46 ProSAT]</span></td></tr>
 </table>

5d46

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Structural Basis for a New Templated Activity by Terminal Deoxynucleotidyl Transferase: Implications for V(D)J Recombination

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

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