8RMO

Crystal structure of anti-FLAG M2 Fab fragment bound to FLAG-tag peptide epitope

• PDB DOI: https://doi.org/10.2210/pdb8RMO/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): synthetic construct, Mus musculus
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2024-01-08 Released: 2024-04-03 
• Deposition Author(s): Beugelink, J.W., Janssen, B.J.C., Pronker, M.F.
• Funding Organization(s): Netherlands Organisation for Scientific Research (NWO)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.16 Å
• R-Value Free: 0.185 
• R-Value Work: 0.158 

Literature

Structural basis for recognition of the FLAG-1 tag by anti-FLAG M2

Beugelink, J.W., Sweep, E., Janssen, B.J.C., Snijder, J., Pronker, M.F.

(2024) Biorxiv 

• DOI: https://doi.org/10.1101/2024.03.25.586599

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 

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

Biological Assembly Evidence: surface plasmon resonance

Macromolecule Content

• Total Structure Weight: 50.02 kDa 
• Atom Count: 4,020 
• Modelled Residue Count: 423 
• Deposited Residue Count: 455 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
FLAG-tag	A [auth F]	8	synthetic construct	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
anti-FLAG M2 heavy chain	B [auth H]	228	Mus musculus	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
anti-FLAG M2 light chain	C [auth L]	219	Mus musculus	Mutation(s): 0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CL	D [auth H], E [auth H], F [auth H]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
PCA	B [auth H]	L-PEPTIDE LINKING	C5 H7 N O3		GLN

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.16 Å
• R-Value Free: 0.185 
• R-Value Work: 0.158 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 87.432	α = 90
b = 134.621	β = 90
c = 41.798	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
autoPROC	data reduction
STARANISO	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-04-03 
Deposition Author(s): Beugelink, J.W., Janssen, B.J.C., Pronker, M.F.

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Funding Organization	Location	Grant Number
Netherlands Organisation for Scientific Research (NWO)	Netherlands	--

Revision History  

• Version 1.0: 2024-04-03
  Type: Initial release