3R0M

Crystal structure of anti-HIV llama VHH antibody A12

• PDB DOI: https://doi.org/10.2210/pdb3R0M/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Lama glama
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2011-03-08 Released: 2012-03-14 
• Deposition Author(s): Chen, L., McLellan, J.S., Kwon, Y.D., Schmidt, S., Wu, X., Zhou, T., Yang, Y., Zhang, B., Forsman, A., Weiss, R.A., Verrips, T., Mascola, J., Kwong, P.D.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free: 
  0.217 (Depositor), 0.220 (DCC) 
• R-Value Work: 
  0.193 (Depositor), 0.190 (DCC) 
• R-Value Observed: 
  0.194 (Depositor) 

Literature

Single-Headed Immunoglobulins Efficiently Penetrate CD4-Binding Site and Effectively Neutralize HIV-1

Chen, L., McLellan, J.S., Kwon, Y.D., Schmidt, S., Wu, X., Zhou, T., Yang, Y., Zhang, B., Forsman, A., Weiss, R.A., Verrips, T., Mascola, J., Kwong, P.D.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 32.35 kDa 
• Atom Count: 2,335 
• Modelled Residue Count: 254 
• Deposited Residue Count: 286 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Llama VHH A12	A, B	143	Lama glama	Mutation(s): 0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	C [auth A], D [auth A], E [auth A], F [auth B], G [auth B], H [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free:  0.217 (Depositor), 0.220 (DCC) 
• R-Value Work:  0.193 (Depositor), 0.190 (DCC) 
• R-Value Observed: 0.194 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 57.884	α = 90
b = 64.268	β = 90
c = 81.493	γ = 90

Software Package:

Software Name	Purpose
SERGUI	data collection
PHASER	phasing
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-03-14 
Deposition Author(s): Chen, L., McLellan, J.S., Kwon, Y.D., Schmidt, S., Wu, X., Zhou, T., Yang, Y., Zhang, B., Forsman, A., Weiss, R.A., Verrips, T., Mascola, J., Kwong, P.D.

Revision History  

• Version 1.0: 2012-03-14
  Type: Initial release
  
• Version 1.1: 2024-11-27
  Changes: Data collection, Database references, Derived calculations, Structure summary