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==Solution Structure of the human BLM HRDC domain==
==Solution Structure of the human BLM HRDC domain==
<StructureSection load='2kv2' size='340' side='right'caption='[[2kv2]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''>
<StructureSection load='2kv2' size='340' side='right'caption='[[2kv2]]' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[2kv2]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Human Human]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2KV2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2KV2 FirstGlance]. <br>
<table><tr><td colspan='2'>[[2kv2]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2KV2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2KV2 FirstGlance]. <br>
</td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">BLM ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</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=2kv2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2kv2 OCA], [https://pdbe.org/2kv2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2kv2 RCSB], [https://www.ebi.ac.uk/pdbsum/2kv2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2kv2 ProSAT]</span></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=2kv2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2kv2 OCA], [https://pdbe.org/2kv2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2kv2 RCSB], [https://www.ebi.ac.uk/pdbsum/2kv2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2kv2 ProSAT]</span></td></tr>
</table>
</table>
== Disease ==
== Disease ==
[[https://www.uniprot.org/uniprot/BLM_HUMAN BLM_HUMAN]] Bloom syndrome. The disease is caused by mutations affecting the gene represented in this entry.  
[https://www.uniprot.org/uniprot/BLM_HUMAN BLM_HUMAN] Bloom syndrome. The disease is caused by mutations affecting the gene represented in this entry.
== Function ==
== Function ==
[[https://www.uniprot.org/uniprot/BLM_HUMAN BLM_HUMAN]] Participates in DNA replication and repair. Exhibits a magnesium-dependent ATP-dependent DNA-helicase activity that unwinds single- and double-stranded DNA in a 3'-5' direction. Involved in 5'-end resection of DNA during double-strand break (DSB) repair: unwinds DNA and recruits DNA2 which mediates the cleavage of 5'-ssDNA. Negatively regulates sister chromatid exchange (SCE).<ref>PMID:9388193</ref> <ref>PMID:12019152</ref> <ref>PMID:21325134</ref> <ref>PMID:23509288</ref>
[https://www.uniprot.org/uniprot/BLM_HUMAN BLM_HUMAN] Participates in DNA replication and repair. Exhibits a magnesium-dependent ATP-dependent DNA-helicase activity that unwinds single- and double-stranded DNA in a 3'-5' direction. Involved in 5'-end resection of DNA during double-strand break (DSB) repair: unwinds DNA and recruits DNA2 which mediates the cleavage of 5'-ssDNA. Negatively regulates sister chromatid exchange (SCE).<ref>PMID:9388193</ref> <ref>PMID:12019152</ref> <ref>PMID:21325134</ref> <ref>PMID:23509288</ref>  
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The helicase and RNaseD C-terminal (HRDC) domain, conserved among members of the RecQ helicase family, regulates helicase activity by virtue of variations in its surface residues. The HRDC domain of Bloom syndrome protein (BLM) is known as a critical determinant of the dissolution function of double Holliday junctions by the BLM-Topoisomerase IIIalpha complex. In this study, we determined the solution structure of the human BLM HRDC domain and characterized its DNA-binding activity. The BLM HRDC domain consists of five alpha-helices with a hydrophobic 3(10)-helical loop between helices 1 and 2 and an extended acidic surface comprising residues in helices 3-5. The BLM HRDC domain preferentially binds to ssDNA, though with a markedly low binding affinity (K(d) approximately 100 muM). NMR chemical shift perturbation studies suggested that the critical DNA-binding residues of the BLM HRDC domain are located in the hydrophobic loop and the N-terminus of helix 2. Interestingly, the isolated BLM HRDC domain had quite different DNA-binding modes between ssDNA and Holliday junctions in electrophoretic mobility shift assay experiments. Based on its surface charge separation and DNA-binding properties, we suggest that the HRDC domain of BLM may be adapted for a unique function among RecQ helicases-that of bridging protein and DNA interactions.


Structure and function of the regulatory HRDC domain from human Bloom syndrome protein.,Kim YM, Choi BS Nucleic Acids Res. 2010 Nov 1;38(21):7764-77. Epub 2010 Jul 17. PMID:20639533<ref>PMID:20639533</ref>
==See Also==
 
*[[Helicase 3D structures|Helicase 3D structures]]
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 2kv2" style="background-color:#fffaf0;"></div>
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Human]]
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Choi, B S]]
[[Category: Choi B-S]]
[[Category: Kim, Y M]]
[[Category: Kim YM]]
[[Category: Bloom syndrome]]
[[Category: Disease mutation]]
[[Category: Dna replication]]
[[Category: Dna-binding]]
[[Category: Gene regulation]]
[[Category: Hrdc domain]]
[[Category: Nucleotide-binding]]
[[Category: Nucleus]]

Latest revision as of 09:49, 1 May 2024

Solution Structure of the human BLM HRDC domainSolution Structure of the human BLM HRDC domain

Structural highlights

2kv2 is a 1 chain structure with sequence from Homo sapiens. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:Solution NMR
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

BLM_HUMAN Bloom syndrome. The disease is caused by mutations affecting the gene represented in this entry.

Function

BLM_HUMAN Participates in DNA replication and repair. Exhibits a magnesium-dependent ATP-dependent DNA-helicase activity that unwinds single- and double-stranded DNA in a 3'-5' direction. Involved in 5'-end resection of DNA during double-strand break (DSB) repair: unwinds DNA and recruits DNA2 which mediates the cleavage of 5'-ssDNA. Negatively regulates sister chromatid exchange (SCE).[1] [2] [3] [4]

See Also

References

  1. ↑ Karow JK, Chakraverty RK, Hickson ID. The Bloom's syndrome gene product is a 3'-5' DNA helicase. J Biol Chem. 1997 Dec 5;272(49):30611-4. PMID:9388193
  2. ↑ Langland G, Elliott J, Li Y, Creaney J, Dixon K, Groden J. The BLM helicase is necessary for normal DNA double-strand break repair. Cancer Res. 2002 May 15;62(10):2766-70. PMID:12019152
  3. ↑ Nimonkar AV, Genschel J, Kinoshita E, Polaczek P, Campbell JL, Wyman C, Modrich P, Kowalczykowski SC. BLM-DNA2-RPA-MRN and EXO1-BLM-RPA-MRN constitute two DNA end resection machineries for human DNA break repair. Genes Dev. 2011 Feb 15;25(4):350-62. doi: 10.1101/gad.2003811. PMID:21325134 doi:http://dx.doi.org/10.1101/gad.2003811
  4. ↑ Wan L, Han J, Liu T, Dong S, Xie F, Chen H, Huang J. Scaffolding protein SPIDR/KIAA0146 connects the Bloom syndrome helicase with homologous recombination repair. Proc Natl Acad Sci U S A. 2013 Jun 25;110(26):10646-51. doi:, 10.1073/pnas.1220921110. Epub 2013 Mar 18. PMID:23509288 doi:http://dx.doi.org/10.1073/pnas.1220921110
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