Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 19.73 kDa 
• Atom Count: 1469 
• Modelled Residue Count: 178 
• Deposited Residue Count: 178 
• Unique protein chains: 1

1CDH

STRUCTURES OF AN HIV AND MHC BINDING FRAGMENT FROM HUMAN CD4 AS REFINED IN TWO CRYSTAL LATTICES

• PDB DOI: 10.2210/pdb1CDH/pdb
• Entry: 1CDH supersedes: 1CD4

• Classification: T-CELL SURFACE GLYCOPROTEIN
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 1994-01-26 Released: 1994-04-30 
• Deposition Author(s): Ryu, S.E., Truneh, A., Sweet, R.W., Hendrickson, W.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Work: 0.193 
• R-Value Observed: 0.193 

Literature

Structures of an HIV and MHC binding fragment from human CD4 as refined in two crystal lattices.

Ryu, S.E., Truneh, A., Sweet, R.W., Hendrickson, W.A.

(1994) Structure 2: 59-74

• PubMed: 8075984 
• DOI: 10.1016/S0969-2126(00)00008-3
• Primary Citation of Related Structures:  
  1CDH, 1CDI


• PubMed Abstract: 
  

The T-cell surface glycoprotein CD4 interacts with class II molecules of the major histocompatibility complex (MHC) enhancing the signal for T-cell activation. Human CD4 also interacts, at high affinity, with the HIV envelope glycoprotein, gp120, to mediate T-cell infection by HIV. Crystal structures of amino-terminal two-domain (D1D2) fragments of human CD4, which contain the residues implicated in HIV and MHC interactions, have been reported earlier.

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Organizational Affiliation: 

Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
T CELL SURFACE GLYCOPROTEIN CD4	A	178	Homo sapiens	Mutation(s): 0  Gene Names: CD4
UniProt & NIH Common Fund Data Resources
Find proteins for P01730 (Homo sapiens) Explore P01730  Go to UniProtKB:  P01730
PHAROS:  P01730

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Work: 0.193 
• R-Value Observed: 0.193 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 83.71	α = 90
b = 30.01	β = 117.28
c = 87.54	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
PROLSQ	refinement
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1994-01-26 
• Released Date: 1994-04-30 
Deposition Author(s): Ryu, S.E., Truneh, A., Sweet, R.W., Hendrickson, W.A.
• This entry supersedes: 1CD4

Revision History  

• Version 1.0: 1994-04-30
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2019-07-17
  Changes: Data collection, Other, Refinement description
• Version 1.4: 2019-08-14
  Changes: Data collection, Refinement description