6Y2A | pdb_00006y2a

Crystal structure of HLA-B2705 complexed with the nona-peptide mQ

• PDB DOI: https://doi.org/10.2210/pdb6Y2A/pdb

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


• Deposited: 2020-02-15 Released: 2020-12-23 
• Deposition Author(s): Loll, B., Rueckert, C., Ziegler, B.-U., Ziegler, A.
• Funding Organization(s): German Research Foundation (DFG)

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.25 Å
• R-Value Free: 
  0.155 (Depositor), 0.150 (DCC) 
• R-Value Work: 
  0.129 (Depositor), 0.130 (DCC) 
• R-Value Observed: 
  0.131 (Depositor) 

Starting Model: experimental

Literature

A CENTRAL PEPTIDE RESIDUE CAN CONTROL MHC POLYMORPHISM-DEPENDENT ANTIGEN PRESENTATION

Loll, B., Rueckert, C., Ziegler, B.-U., Ziegler, A.

To be published.

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: gel filtration

Macromolecule Content 

• Total Structure Weight: 45.29 kDa 
• Atom Count: 4,207 
• Modeled Residue Count: 385 
• Deposited Residue Count: 385 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
MHC class I antigen	A	276	Homo sapiens	Mutation(s): 0  Gene Names: HLA-B
UniProt
Find proteins for A0A6B7HFJ9 (Homo sapiens) Explore A0A6B7HFJ9  Go to UniProtKB:  A0A6B7HFJ9

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Beta-2-microglobulin	B	100	Homo sapiens	Mutation(s): 0  Gene Names: B2M, CDABP0092, HDCMA22P
UniProt & NIH Common Fund Data Resources
Find proteins for P61769 (Homo sapiens) Explore P61769  Go to UniProtKB:  P61769
PHAROS:  P61769 GTEx:  ENSG00000166710

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
mQ	C	9	synthetic construct	Mutation(s): 0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GOL	D [auth A], E [auth A], F [auth A], G [auth A], H [auth B]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.25 Å
• R-Value Free:  0.155 (Depositor), 0.150 (DCC) 
• R-Value Work:  0.129 (Depositor), 0.130 (DCC) 
• R-Value Observed: 0.131 (Depositor) 

Diffraction Data: https://doi.org/10.18430/m36y2a

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 50.89	α = 90
b = 82.32	β = 90
c = 109.61	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHASER	phasing
DNA	data collection

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2020-12-23 
Deposition Author(s): Loll, B., Rueckert, C., Ziegler, B.-U., Ziegler, A.

---

Funding Organization	Location	Grant Number
German Research Foundation (DFG)	Germany	SfB 449

Revision History  

• Version 1.0: 2020-12-23
  Type: Initial release
  
• Version 1.1: 2024-01-24
  Changes: Data collection, Database references, Refinement description
• Version 1.2: 2024-10-16
  Changes: Structure summary