1T2Q

The Crystal Structure of an NNA7 Fab that recognizes an N-type blood group antigen

• PDB DOI: https://doi.org/10.2210/pdb1T2Q/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Mus musculus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2004-04-22 Released: 2005-06-07 
• Deposition Author(s): Xie, K., Song, S.C., Spitalnik, S.L., Wedekind, J.E.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.83 Å
• R-Value Free: 0.247 
• R-Value Work: 0.204 
• R-Value Observed: 0.204 

Starting Model: experimental

Literature

Crystal Structure and Mutational Analysis of an Antibody that Recognizes an N-type Blood Group Antigen

Xie, K., Song, S.C., Spitalnik, S.L., Wedekind, J.E.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 Pseudo Symmetry: Cyclic - C2  (Explore in 3D)
Pseudo Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 47.82 kDa 
• Atom Count: 3,922 
• Modelled Residue Count: 434 
• Deposited Residue Count: 438 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Fab NNA7 Heavy Chain	A [auth L]	217	Mus musculus	Mutation(s): 0  Gene Names: N92 IgG2a
UniProt
Find proteins for A2NHM3 (Mus musculus) Go to UniProtKB:  A2NHM3

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Fab NNA7 Light Chain	B [auth H]	221	Mus musculus	Mutation(s): 0  Gene Names: N92 L chain
UniProt
Find proteins for P01821 (Mus musculus) Go to UniProtKB:  P01821

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MES	D [auth H]	2-(N-MORPHOLINO)-ETHANESULFONIC ACID C6 H13 N O4 S SXGZJKUKBWWHRA-UHFFFAOYSA-N
GOL	C [auth L], E [auth H]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.83 Å
• R-Value Free: 0.247 
• R-Value Work: 0.204 
• R-Value Observed: 0.204 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 57.863	α = 90
b = 77.123	β = 90
c = 118.131	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
CrystalClear	data reduction
CrystalClear	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2005-06-07 
Deposition Author(s): Xie, K., Song, S.C., Spitalnik, S.L., Wedekind, J.E.

Revision History  

• Version 1.0: 2005-06-07
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Non-polymer description, Version format compliance
• Version 1.3: 2024-04-03
  Changes: Data collection, Database references, Derived calculations, Refinement description
• Version 1.4: 2024-10-16
  Changes: Structure summary