3OBU

Crystal structure of the Tsg101 UEV domain in complex with a HIV-1 PTAP peptide

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.199 

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This is version 1.1 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:  
    3OBX, 3OBQ, 3OBS, 3OBU

  • 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 of the human TSG101 UEV domain alone and with wild-type and mutant HIV-1 PTAP and Hrs PSAP nonapeptides ...

    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: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Tumor susceptibility gene 101 protein A146Homo sapiensMutation(s): 0 
Gene Names: TSG101
Find proteins for Q99816 (Homo sapiens)
Explore Q99816 
Go to UniProtKB:  Q99816
NIH Common Fund Data Resources
PHAROS:  Q99816
GTEx:  ENSG00000074319
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Gag polyprotein B9N/AMutation(s): 0 
Find proteins for Q72497 (Human immunodeficiency virus 1)
Explore Q72497 
Go to UniProtKB:  Q72497
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.199 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 33.526α = 90
b = 45.769β = 90
c = 85.446γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
MOLREPphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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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  (Full details and data files)

  • Version 1.0: 2010-12-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance