1ALY

CRYSTAL STRUCTURE OF HUMAN CD40 LIGAND

• PDB DOI: https://doi.org/10.2210/pdb1ALY/pdb

• Classification: CYTOKINE
• Organism(s): Homo sapiens
• Expression System: Komagataella pastoris
• Mutation(s): No 


• Deposited: 1997-06-05 Released: 1997-09-17 
• Deposition Author(s): Karpusas, M., Hsu, Y.M., Thomas, D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.295 
• R-Value Work: 0.223 
• R-Value Observed: 0.223 

Literature

2 A crystal structure of an extracellular fragment of human CD40 ligand.

Karpusas, M., Hsu, Y.M., Wang, J.H., Thompson, J., Lederman, S., Chess, L., Thomas, D.

(1995) Structure 3: 1031-1039

• PubMed: 8589998 
• DOI: https://doi.org/10.1016/s0969-2126(01)00239-8
• Primary Citation of Related Structures:  
  1ALY


• PubMed Abstract: 
  

  The CD40 ligand (CD40L) is a member of the tumor necrosis factor (TNF) family of proteins and is transiently expressed on the surface of activated T cells. The binding of CD40L to CD40, which is expressed on the surface of B cells, provides a critical and unique pathway of cellular activation resulting in antibody isotype switching, regulation of apoptosis, and B cell proliferation and differentiation. Naturally occurring mutations of CD40L result in the clinical hyper-IgM syndrome, characterized by an inability to produce immunoglobulins of the IgG, IgA and IgE isotypes.

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Organizational Affiliation: 

Biogen, Inc., Cambridge, MA 02142, USA.

Biological Assembly 1  

Global Symmetry: Cyclic - C3  (Explore in 3D)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 15.81 kDa 
• Atom Count: 1,177 
• Modelled Residue Count: 146 
• Deposited Residue Count: 146 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CD40 LIGAND	A	146	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P29965 (Homo sapiens) Explore P29965  Go to UniProtKB:  P29965
PHAROS:  P29965 GTEx:  ENSG00000102245

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.295 
• R-Value Work: 0.223 
• R-Value Observed: 0.223 
• Space Group: H 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 77.17	α = 90
b = 77.17	β = 90
c = 90.46	γ = 120

Software Package:

Software Name	Purpose
XDS	data scaling
BUDDHA	data reduction
X-PLOR	model building
X-PLOR	refinement
XDS	data reduction
BUDDHA	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-09-17 
Deposition Author(s): Karpusas, M., Hsu, Y.M., Thomas, D.

Revision History  

• Version 1.0: 1997-09-17
  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: 2024-04-03
  Changes: Data collection, Database references, Refinement description