2J3O

L-ficolin complexed to N-acetyl-D-glucosamine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.234 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Structural Insights Into the Innate Immune Recognition Specificities of L- and H-Ficolins.

Garlatti, V.Belloy, N.Martin, L.Lacroix, M.Matsushita, M.Endo, Y.Fujita, T.Fontecilla-Camps, J.C.Arlaud, G.J.Thielens, N.M.Gaboriaud, C.

(2007) EMBO J 26: 623

  • DOI: 10.1038/sj.emboj.7601500
  • Primary Citation of Related Structures:  
    2J0H, 2J0G, 2J0Y, 2J1G, 2J2P, 2J3O, 2J3U, 2J3G, 2J3F, 2J64, 2J61, 2J60, 2J5Z

  • PubMed Abstract: 
  • Innate immunity relies critically upon the ability of a few pattern recognition molecules to sense molecular markers on pathogens, but little is known about these interactions at the atomic level. Human L- and H-ficolins are soluble oligomeric defence proteins with lectin-like activity, assembled from collagen fibers prolonged by fibrinogen-like recognition domains ...

    Innate immunity relies critically upon the ability of a few pattern recognition molecules to sense molecular markers on pathogens, but little is known about these interactions at the atomic level. Human L- and H-ficolins are soluble oligomeric defence proteins with lectin-like activity, assembled from collagen fibers prolonged by fibrinogen-like recognition domains. The X-ray structures of their trimeric recognition domains, alone and in complex with various ligands, have been solved to resolutions up to 1.95 and 1.7 A, respectively. Both domains have three-lobed structures with clefts separating the distal parts of the protomers. Ca(2+) ions are found at sites homologous to those described for tachylectin 5A (TL5A), an invertebrate lectin. Outer binding sites (S1) homologous to the GlcNAc-binding pocket of TL5A are present in the ficolins but show different structures and specificities. In L-ficolin, three additional binding sites (S2-S4) surround the cleft. Together, they define an unpredicted continuous recognition surface able to sense various acetylated and neutral carbohydrate markers in the context of extended polysaccharides such as 1,3-beta-D-glucan, as found on microbial or apoptotic surfaces.


    Organizational Affiliation

    Laboratoire de Cristallographie et Cristallogénèse des Protéines, Grenoble, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
FICOLIN-2A, B, C, D, E, F219Homo sapiensMutation(s): 0 
Gene Names: FCN2FCNL
UniProt & NIH Common Fund Data Resources
Find proteins for Q15485 (Homo sapiens)
Explore Q15485 
Go to UniProtKB:  Q15485
PHAROS:  Q15485
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG (Subject of Investigation/LOI)
Query on NAG

Download Ideal Coordinates CCD File 
I [auth B], L [auth B], M [auth C], N [auth C], P [auth D], R [auth E], T [auth E], U [auth E]2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
ACT
Query on ACT

Download Ideal Coordinates CCD File 
H [auth B], K [auth B]ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
G [auth A], J [auth B], O [auth C], Q [auth D], S [auth E], V [auth F]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.234 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 200.52α = 90
b = 84.51β = 123.57
c = 144.09γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-01-23
    Type: Initial release
  • Version 1.1: 2011-10-12
    Changes: Derived calculations, Non-polymer description, Other, Structure summary, Version format compliance
  • Version 1.2: 2019-04-03
    Changes: Data collection, Derived calculations, Other, Source and taxonomy
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Data collection, Derived calculations, Other, Structure summary