2W7A

Structure of the human LINE-1 ORF1p central domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.135 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Non-Ltr Retrotransposons Encode Noncanonical Rrm Domains in Their First Open Reading Frame.

Khazina, E.Weichenrieder, O.

(2009) Proc.Natl.Acad.Sci.USA 106: 731

  • DOI: 10.1073/pnas.0809964106

  • PubMed Abstract: 
  • Non-LTR retrotransposons (NLRs) are a unique class of mobile genetic elements that have significant impact on the evolution of eukaryotic genomes. However, the molecular details and functions of their encoded proteins, in particular of the accessory ...

    Non-LTR retrotransposons (NLRs) are a unique class of mobile genetic elements that have significant impact on the evolution of eukaryotic genomes. However, the molecular details and functions of their encoded proteins, in particular of the accessory ORF1p proteins, are poorly understood. Here, we identify noncanonical RNA-recognition-motifs (RRMs) in several phylogenetically unrelated NLR ORF1p proteins. This provides an explanation for their RNA-binding properties and clearly shows that they are not related to the retroviral nucleocapsid protein Gag, despite the frequent presence of CCHC zinc knuckles. In particular, we characterize the ORF1p protein of the human long interspersed nuclear element 1 (LINE-1 or L1). We show that L1ORF1p is a multidomain protein, consisting of a coiled coil (cc), RRM, and C-terminal domain (CTD). Most importantly, we solved the crystal structure of the RRM domain, which is characterized by extended loops stabilized by unique salt bridges. Furthermore, we demonstrate that L1ORF1p trimerizes via its N-terminal cc domain, and we suggest that this property is functionally important for all homologues. The formation of distinct complexes with single-stranded nucleic acids requires the presence of the RRM and CTD domains on the same polypeptide chain as well as their close cooperation. Finally, the phylogenetic analysis of mammalian L1ORF1p shows an ancient origin of the RRM domain and supports a modular evolution of NLRs.


    Organizational Affiliation

    Department of Biochemistry, Max Planck Institute for Developmental Biology, Spemannstrasse 35, 72076 Tübingen, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
LINE-1 ORF1P
A, B
100Homo sapiensMutation(s): 0 
Gene Names: L1RE1 (LRE1)
Find proteins for Q9UN81 (Homo sapiens)
Go to UniProtKB:  Q9UN81
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MLI
Query on MLI

Download SDF File 
Download CCD File 
B
MALONATE ION
C3 H2 O4
OFOBLEOULBTSOW-UHFFFAOYSA-L
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.135 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 32.360α = 90.00
b = 54.710β = 102.95
c = 57.810γ = 90.00
Software Package:
Software NamePurpose
SHELXphasing
XSCALEdata scaling
XDSdata reduction
SHARPphasing
autoSHARPphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-01-27
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance