2M65

NMR structure of human restriction factor APOBEC3A


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 512 
  • Conformers Submitted: 30 
  • 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

NMR structure of human restriction factor APOBEC3A reveals substrate binding and enzyme specificity.

Byeon, I.J.Ahn, J.Mitra, M.Byeon, C.H.Hercik, K.Hritz, J.Charlton, L.M.Levin, J.G.Gronenborn, A.M.

(2013) Nat Commun 4: 1890-1890

  • DOI: 10.1038/ncomms2883

  • PubMed Abstract: 
  • Human APOBEC3A is a single-stranded DNA cytidine deaminase that restricts viral pathogens and endogenous retrotransposons, and has a role in the innate immune response. Furthermore, its potential to act as a genomic DNA mutator has implications for a ...

    Human APOBEC3A is a single-stranded DNA cytidine deaminase that restricts viral pathogens and endogenous retrotransposons, and has a role in the innate immune response. Furthermore, its potential to act as a genomic DNA mutator has implications for a role in carcinogenesis. A deeper understanding of APOBEC3A's deaminase and nucleic acid-binding properties, which is central to its biological activities, has been limited by the lack of structural information. Here we report the nuclear magnetic resonance solution structure of APOBEC3A and show that the critical interface for interaction with single-stranded DNA substrates includes residues extending beyond the catalytic centre. Importantly, by monitoring deaminase activity in real time, we find that A3A displays similar catalytic activity on APOBEC3A-specific TTCA- or A3G-specific CCCA-containing substrates, involving key determinants immediately 5' of the reactive C. Our results afford novel mechanistic insights into APOBEC3A-mediated deamination and provide the structural basis for further molecular studies.


    Organizational Affiliation

    Department of Structural Biology, University of Pittsburgh School of Medicine, 3501 Fifth Avenue, Pittsburgh, PA 15261, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Probable DNA dC->dU-editing enzyme APOBEC-3A
A
207Homo sapiensGene Names: APOBEC3A
EC: 3.5.4.-
Find proteins for P31941 (Homo sapiens)
Go to Gene View: APOBEC3A
Go to UniProtKB:  P31941
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 512 
  • Conformers Submitted: 30 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2M65 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-05-22
    Type: Initial release
  • Version 1.1: 2013-06-05
    Type: Database references
  • Version 1.2: 2013-06-19
    Type: Database references