2N1U

Structure of SAP30L corepressor protein


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 300 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Redox-dependent disulfide bond formation in SAP30L corepressor protein: Implications for structure and function.

Laitaoja, M.Tossavainen, H.Pihlajamaa, T.Valjakka, J.Viiri, K.Lohi, O.Permi, P.Janis, J.

(2016) Protein Sci 25: 572-586

  • DOI: https://doi.org/10.1002/pro.2849
  • Primary Citation of Related Structures:  
    2N1U

  • PubMed Abstract: 

    Sin3A-associated protein 30-like (SAP30L) is one of the key proteins in a multi-subunit protein complex involved in transcriptional regulation via histone deacetylation. SAP30L, together with a highly homologous SAP30 as well as other SAP proteins (i.e., SAP25, SAP45, SAP130, and SAP180), is an essential component of the Sin3A corepressor complex, although its actual role has remained elusive. SAP30L is thought to function as an important stabilizing and bridging molecule in the complex and to mediate its interactions with other corepressors. SAP30L has been previously shown to contain an N-terminal Cys3 His type zinc finger (ZnF) motif, which is responsible for the key protein-protein, protein-DNA, and protein-lipid interactions. By using high-resolution mass spectrometry, we studied a redox-dependent disulfide bond formation in SAP30L ZnF as a regulatory mechanism for its structure and function. We showed that upon oxidative stress SAP30L undergoes the formation of two specific disulfide bonds, a vicinal Cys29-Cys30 and Cys38-Cys74, with a concomitant release of the coordinated zinc ion. The oxidized protein was shown to remain folded in solution and to bind signaling phospholipids. We also determined a solution NMR structure for SAP30L ZnF that showed an overall fold similar to that of SAP30, determined earlier. The NMR titration experiments with lipids and DNA showed that the binding is mediated by the C-terminal tail as well as both α-helices of SAP30L ZnF. The implications of these results for the structure and function of SAP30L are discussed.


  • Organizational Affiliation

    Department of Chemistry, University of Eastern Finland, Joensuu, Finland.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Histone deacetylase complex subunit SAP30L70Homo sapiensMutation(s): 0 
Gene Names: SAP30LNS4ATP2
UniProt & NIH Common Fund Data Resources
Find proteins for Q9HAJ7 (Homo sapiens)
Explore Q9HAJ7 
Go to UniProtKB:  Q9HAJ7
PHAROS:  Q9HAJ7
GTEx:  ENSG00000164576 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9HAJ7
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download Ideal Coordinates CCD File 
B [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 300 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-11-25
    Type: Initial release
  • Version 1.1: 2015-12-09
    Changes: Database references
  • Version 1.2: 2016-03-23
    Changes: Database references