3OBQ

Crystal Structure of the Tsg101 UEV domain in complex with a human HRS PSAP peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystallographic and Functional Analysis of the ESCRT-I /HIV-1 Gag PTAP Interaction.

Im, Y.J.Kuo, L.Ren, X.Burgos, P.V.Zhao, X.Z.Liu, F.Burke, T.R.Bonifacino, J.S.Freed, E.O.Hurley, J.H.

(2010) Structure 18: 1536-1547

  • DOI: 10.1016/j.str.2010.08.010
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Budding of HIV-1 requires the binding of the PTAP late domain of the Gag p6 protein to the UEV domain of the TSG101 subunit of ESCRT-I. The normal function of this motif in cells is in receptor downregulation. Here, we report the 1.4-1.6 Å structures ...

    Budding of HIV-1 requires the binding of the PTAP late domain of the Gag p6 protein to the UEV domain of the TSG101 subunit of ESCRT-I. The normal function of this motif in cells is in receptor downregulation. Here, we report the 1.4-1.6 Å structures of the human TSG101 UEV domain alone and with wild-type and mutant HIV-1 PTAP and Hrs PSAP nonapeptides. The hydroxyl of the Thr or Ser residue in the P(S/T)AP motif hydrogen bonds with the main chain of Asn69. Mutation of the Asn to Pro, blocking the main-chain amide, abrogates PTAP motif binding in vitro and blocks budding of HIV-1 from cells. N69P and other PTAP binding-deficient alleles of TSG101 did not rescue HIV-1 budding. However, the mutant alleles did rescue downregulation of endogenous EGF receptor. This demonstrates that the PSAP motif is not rate determining in EGF receptor downregulation under normal conditions.


    Organizational Affiliation

    Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0580, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tumor susceptibility gene 101 protein
A
146Homo sapiensMutation(s): 0 
Gene Names: TSG101
Find proteins for Q99816 (Homo sapiens)
Go to Gene View: TSG101
Go to UniProtKB:  Q99816
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Hepatocyte growth factor-regulated tyrosine kinase substrate
B
9Homo sapiensMutation(s): 0 
Gene Names: HGS (HRS)
Find proteins for O14964 (Homo sapiens)
Go to Gene View: HGS
Go to UniProtKB:  O14964
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.207 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 33.654α = 90.00
b = 45.126β = 90.00
c = 87.734γ = 90.00
Software Package:
Software NamePurpose
MAR345dtbdata collection
CNSrefinement
MOLREPphasing
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2010-08-09 
  • Released Date: 2010-12-01 
  • Deposition Author(s): Im, Y.J., Hurley, J.H.

Revision History 

  • Version 1.0: 2010-12-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2015-05-27
    Type: Source and taxonomy