4Y66

Crystal structure of Giardia lamblia Hop2-Mnd1 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.239 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal structure of Hop2-Mnd1 and mechanistic insights into its role in meiotic recombination

Kang, H.A.Shin, H.C.Kalantzi, A.S.Toseland, C.P.Kim, H.M.Gruber, S.Peraro, M.D.Oh, B.H.

(2015) Nucleic Acids Res. 43: 3841-3856

  • DOI: 10.1093/nar/gkv172

  • PubMed Abstract: 
  • In meiotic DNA recombination, the Hop2-Mnd1 complex promotes Dmc1-mediated single-stranded DNA (ssDNA) invasion into homologous chromosomes to form a synaptic complex by a yet-unclear mechanism. Here, the crystal structure of Hop2-Mnd1 reveals that i ...

    In meiotic DNA recombination, the Hop2-Mnd1 complex promotes Dmc1-mediated single-stranded DNA (ssDNA) invasion into homologous chromosomes to form a synaptic complex by a yet-unclear mechanism. Here, the crystal structure of Hop2-Mnd1 reveals that it forms a curved rod-like structure consisting of three leucine zippers and two kinked junctions. One end of the rod is linked to two juxtaposed winged-helix domains, and the other end is capped by extra α-helices to form a helical bundle-like structure. Deletion analysis shows that the helical bundle-like structure is sufficient for interacting with the Dmc1-ssDNA nucleofilament, and molecular modeling suggests that the curved rod could be accommodated into the helical groove of the nucleofilament. Remarkably, the winged-helix domains are juxtaposed at fixed relative orientation, and their binding to DNA is likely to perturb the base pairing according to molecular simulations. These findings allow us to propose a model explaining how Hop2-Mnd1 juxtaposes Dmc1-bound ssDNA with distorted recipient double-stranded DNA and thus facilitates strand invasion.


    Organizational Affiliation

    Department of Biological Sciences, KAIST Institute for the Biocentury, Cancer Metastasis Control Center, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mnd1
A, C, E
203Giardia intestinalis (strain ATCC 50803 / WB clone C6)Mutation(s): 0 
Find proteins for E2RTU1 (Giardia intestinalis (strain ATCC 50803 / WB clone C6))
Go to UniProtKB:  E2RTU1
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Putative tbpip family protein
B, D, F
231Giardia intestinalisMutation(s): 0 
Find proteins for V6TR15 (Giardia intestinalis)
Go to UniProtKB:  V6TR15
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.239 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 117.847α = 90.00
b = 69.066β = 95.34
c = 292.137γ = 90.00
Software Package:
Software NamePurpose
PHENIXphasing
PHENIXrefinement
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-03-18
    Type: Initial release
  • Version 1.1: 2015-05-06
    Type: Database references