2KV2

Solution Structure of the human BLM HRDC domain

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

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Literature

Structure and function of the regulatory HRDC domain from human Bloom syndrome protein

Kim, Y.M., Choi, B.-S.

(2010) Nucleic Acids Res 38: 7764-7777

  • DOI: 10.1093/nar/gkq586
  • Primary Citation of Related Structures:  
    2KV2

  • PubMed Abstract: 

    • 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 IIIα complex ...

    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 IIIα 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 α-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) ∼100 μM). 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.

    Organizational Affiliation: 

    Department of Chemistry, KAIST, Daejon 305-701, Korea.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Bloom syndrome proteinA85Homo sapiensMutation(s): 0 
Gene Names: BLM, RECQ2, RECQL3
EC: 3.6.4.12
UniProt & NIH Common Fund Data Resources
Find proteins for P54132 (Homo sapiens)
Explore P54132 
Go to UniProtKB:  P54132
PHAROS:  P54132
GTEx:  ENSG00000197299
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 2KV2 Olderado

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2010-03-04 
  • Released Date: 2010-12-15 
    • Deposition Author(s): Kim, Y.M., Choi, B.-S.

Revision History  (Full details and data files)

  • Version 1.0: 2010-12-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance