5UFJ

Crystal Structure of Carbonmonoxy Hemoglobin S (Liganded Sickle Cell Hemoglobin) Complexed with GBT Compound 6


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.213 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Discovery of GBT440, an Orally Bioavailable R-State Stabilizer of Sickle Cell Hemoglobin.

Metcalf, B.Chuang, C.Dufu, K.Patel, M.P.Silva-Garcia, A.Johnson, C.Lu, Q.Partridge, J.R.Patskovska, L.Patskovsky, Y.Almo, S.C.Jacobson, M.P.Hua, L.Xu, Q.Gwaltney, S.L.Yee, C.Harris, J.Morgan, B.P.James, J.Xu, D.Hutchaleelaha, A.Paulvannan, K.Oksenberg, D.Li, Z.

(2017) ACS Med Chem Lett 8: 321-326

  • DOI: https://doi.org/10.1021/acsmedchemlett.6b00491
  • Primary Citation of Related Structures:  
    5U3I, 5UFJ

  • PubMed Abstract: 

    We report the discovery of a new potent allosteric effector of sickle cell hemoglobin, GBT440 ( 36 ), that increases the affinity of hemoglobin for oxygen and consequently inhibits its polymerization when subjected to hypoxic conditions. Unlike earlier allosteric activators that bind covalently to hemoglobin in a 2:1 stoichiometry, 36 binds with a 1:1 stoichiometry. Compound 36 is orally bioavailable and partitions highly and favorably into the red blood cell with a RBC/plasma ratio of ∼150. This partitioning onto the target protein is anticipated to allow therapeutic concentrations to be achieved in the red blood cell at low plasma concentrations. GBT440 ( 36 ) is in Phase 3 clinical trials for the treatment of sickle cell disease (NCT03036813).


  • Organizational Affiliation

    Global Blood Therapeutics, Inc. , South San Francisco, California 94080, United States.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Hemoglobin subunit alpha
A, C
141Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P69905 (Homo sapiens)
Explore P69905 
Go to UniProtKB:  P69905
PHAROS:  P69905
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP69905
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Hemoglobin subunit beta
B, D
146Homo sapiensMutation(s): 1 
UniProt & NIH Common Fund Data Resources
Find proteins for P68871 (Homo sapiens)
Explore P68871 
Go to UniProtKB:  P68871
PHAROS:  P68871
GTEx:  ENSG00000244734 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP68871
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download Ideal Coordinates CCD File 
E [auth A],
H [auth B],
J [auth C],
M [auth D]
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
86M
Query on 86M

Download Ideal Coordinates CCD File 
G [auth A],
L [auth C]
5-[(imidazo[1,2-a]pyridin-8-yl)methoxy]-2-methoxypyridine-4-carbaldehyde
C15 H13 N3 O3
XSXGYUKSWKGACV-UHFFFAOYSA-N
CMO
Query on CMO

Download Ideal Coordinates CCD File 
F [auth A],
I [auth B],
K [auth C],
N [auth D]
CARBON MONOXIDE
C O
UGFAIRIUMAVXCW-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.213 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.411α = 90
b = 58.881β = 90
c = 174.386γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-02-22
    Type: Initial release
  • Version 1.1: 2017-04-12
    Changes: Atomic model, Database references
  • Version 1.2: 2023-10-04
    Changes: Data collection, Database references, Derived calculations, Refinement description