4OWX

Structural basis of SOSS1 in complex with a 12nt ssDNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Basis of SOSS1 Complex Assembly and Recognition of ssDNA.

Ren, W.Chen, H.Sun, Q.Tang, X.Lim, S.C.Huang, J.Song, H.

(2014) Cell Rep 6: 982-991

  • DOI: 10.1016/j.celrep.2014.02.020
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The SOSS1 complex comprising SOSSA, SOSSB1, and SOSSC senses single-stranded DNA (ssDNA) and promotes repair of DNA double-strand breaks (DSBs). But how SOSS1 is assembled and recognizes ssDNA remains elusive. The crystal structure of the N-terminal ...

    The SOSS1 complex comprising SOSSA, SOSSB1, and SOSSC senses single-stranded DNA (ssDNA) and promotes repair of DNA double-strand breaks (DSBs). But how SOSS1 is assembled and recognizes ssDNA remains elusive. The crystal structure of the N-terminal half of SOSSA (SOSSAN) in complex with SOSSB1 and SOSSC showed that SOSSAN serves as a scaffold to bind both SOSSB1 and SOSSC for assembly of the SOSS1 complex. The structures of SOSSAN/B1 in complex with a 12 nt ssDNA and SOSSAN/B1/C in complex with a 35 nt ssDNA showed that SOSSB1 interacts with both SOSSAN and ssDNA via two distinct surfaces. Recognition of ssDNA with a length of up to nine nucleotides is mediated solely by SOSSB1, whereas neither SOSSC nor SOSSAN are critical for ssDNA binding. These results reveal the structural basis of SOSS1 assembly and provide a framework for further study of the mechanism governing longer ssDNA recognition by the SOSS1 complex during DSB repair.


    Organizational Affiliation

    Life Sciences Institute, Zhejiang University, 388 Yuhangtang Road, Hangzhou 310058, China; Institute of Molecular and Cell Biology, 61 Biopolis Drive, Singapore 138673, Singapore.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Integrator complex subunit 3
A
500Homo sapiensMutation(s): 0 
Gene Names: INTS3 (C1orf193, C1orf60)
Find proteins for Q68E01 (Homo sapiens)
Go to Gene View: INTS3
Go to UniProtKB:  Q68E01
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
SOSS complex subunit B1
B
211Homo sapiensMutation(s): 0 
Gene Names: NABP2 (OBFC2B, SSB1)
Find proteins for Q9BQ15 (Homo sapiens)
Go to Gene View: NABP2
Go to UniProtKB:  Q9BQ15
Entity ID: 1
MoleculeChainsLengthOrganism
DNA (5'-D(P*TP*TP*TP*TP*TP*TP*TP*TP*T)-3')L12Homo sapiens
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.182 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 98.630α = 90.00
b = 162.520β = 90.00
c = 65.740γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
the Agency for Science, Technology and ResearchSingapore--
National Natural Science Foundation of ChinaChina31270816

Revision History 

  • Version 1.0: 2014-04-16
    Type: Initial release
  • Version 1.1: 2014-12-03
    Type: Database references
  • Version 1.2: 2017-09-06
    Type: Author supporting evidence, Derived calculations, Source and taxonomy