6WVG

human CD53


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.218 

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Literature

Open conformation of tetraspanins shapes interaction partner networks on cell membranes.

Yang, Y.Liu, X.R.Greenberg, Z.J.Zhou, F.He, P.Fan, L.Liu, S.Shen, G.Egawa, T.Gross, M.L.Schuettpelz, L.G.Li, W.

(2020) EMBO J 39: e105246-e105246

  • DOI: 10.15252/embj.2020105246
  • Primary Citation of Related Structures:  
    6WVG

  • PubMed Abstract: 
  • Tetraspanins, including CD53 and CD81, regulate a multitude of cellular processes through organizing an interaction network on cell membranes. Here, we report the crystal structure of CD53 in an open conformation poised for partner interaction. The large extracellular domain (EC2) of CD53 protrudes away from the membrane surface and exposes a variable region, which is identified by hydrogen-deuterium exchange as the common interface for CD53 and CD81 to bind partners ...

    Tetraspanins, including CD53 and CD81, regulate a multitude of cellular processes through organizing an interaction network on cell membranes. Here, we report the crystal structure of CD53 in an open conformation poised for partner interaction. The large extracellular domain (EC2) of CD53 protrudes away from the membrane surface and exposes a variable region, which is identified by hydrogen-deuterium exchange as the common interface for CD53 and CD81 to bind partners. The EC2 orientation in CD53 is supported by an extracellular loop (EC1). At the closed conformation of CD81, however, EC2 disengages from EC1 and rotates toward the membrane, thereby preventing partner interaction. Structural simulation shows that EC1-EC2 interaction also supports the open conformation of CD81. Disrupting this interaction in CD81 impairs the accurate glycosylation of its CD19 partner, the target for leukemia immunotherapies. Moreover, EC1 mutations in CD53 prevent the chemotaxis of pre-B cells toward a chemokine that supports B-cell trafficking and homing within the bone marrow, a major CD53 function identified here. Overall, an open conformation is required for tetraspanin-partner interactions to support myriad cellular processes.


    Related Citations: 
    • Termini restraining of small membrane proteins enables structure determination at atomic resolution
      Liu, S., Li, S., Yang, Y., Li, W.
      () To be published --: --

    Organizational Affiliation

    Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St. Louis, MO, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Green fluorescent protein, Leukocyte surface antigen CD53 chimeraA, B457Aequorea victoriaHomo sapiensMutation(s): 1 
Gene Names: GFPCD53MOX44TSPAN25
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P42212 (Aequorea victoria)
Explore P42212 
Go to UniProtKB:  P42212
Find proteins for P19397 (Homo sapiens)
Explore P19397 
Go to UniProtKB:  P19397
PHAROS:  P19397
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CRO
Query on CRO
A, BL-PEPTIDE LINKINGC15 H17 N3 O5THR, TYR, GLY
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.218 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.31α = 90
b = 209.77β = 100.29
c = 73.28γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2020-05-06 
  • Released Date: 2020-09-16 
  • Deposition Author(s): Yang, Y., Liu, S., Li, W.

Funding OrganizationLocationGrant Number
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)United StatesR01 HL121718
Other privateUnited StatesForefront of Science Award
Other privateUnited StatesMCII 2020-854
National Institutes of Health/National Eye Institute (NIH/NEI)United StatesR21 EY028705
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01 GM131008
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesP30 GM124165

Revision History  (Full details and data files)

  • Version 1.0: 2020-09-16
    Type: Initial release
  • Version 1.1: 2020-10-07
    Changes: Database references