Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 4-mer - A2B2 Pseudo Symmetry: Dihedral - D2  (3D View)
Pseudo Stoichiometry: Homo 4-mer -A4 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 63371.66 
• Atom Count: 4472 
• Residue Count: 566 
• Unique protein chains: 2

6NBD

Human methemoglobin state 2 determined using single-particle cryo-EM at 200 keV

• DOI: 10.2210/pdb6NBD/pdb
• EMDataResource: EMD-0408

• Classification: OXYGEN TRANSPORT
• Organism(s): Homo sapiens


• Deposited: 2018-12-06 Released: 2019-02-13 
• Deposition Author(s): Herzik Jr., M.A., Wu, M., Lander, G.C.
• Funding Organization(s): National Institutes of Health/National Human Genome Research Institute 

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.2 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

High-resolution structure determination of sub-100 kDa complexes using conventional cryo-EM.

Herzik Jr., M.A., Wu, M., Lander, G.C.

(2019) Nat Commun 10: 1032-1032

• PubMed: 30833564 
• Primary Citation of Related Structures:  
  6NBC, 6NBB

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Hemoglobin subunit alpha	A, C	140	Homo sapiens	Mutation(s): 0  Gene Names: HBA1, HBA2
Find proteins for P69905 (Homo sapiens) Go to Gene View: HBA1 HBA2 Go to UniProtKB:  P69905

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
Hemoglobin subunit beta	B, D	143	Homo sapiens	Mutation(s): 0  Gene Names: HBB
Find proteins for P68871 (Homo sapiens) Go to Gene View: HBB Go to UniProtKB:  P68871

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
HEM	A, B, C, D	PROTOPORPHYRIN IX CONTAINING FE HEME C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.2 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Software Package:

Software Name	Purpose
PHENIX	refinement

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2018-12-06 
• Released Date: 2019-02-13 
• Deposition Author(s): Herzik Jr., M.A., Wu, M., Lander, G.C.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Human Genome Research Institute	United States	DP2EB020402

Revision History 

• Version 1.0: 2019-02-13
  Type: Initial release
• Version 1.1: 2019-03-20
  Type: Data collection, Database references