6DS7

Crystal structure of MhuD R26S mutant with two hemes bound per active site

• PDB DOI: https://doi.org/10.2210/pdb6DS7/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Mycobacterium tuberculosis H37Rv
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2018-06-13 Released: 2019-06-19 
• Deposition Author(s): Chao, A., Goulding, C.W.
• Funding Organization(s): National Science Foundation (NSF, United States), National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.227 
• R-Value Work: 0.173 
• R-Value Observed: 0.178 

Starting Model: experimental

Literature

Crystal structure of MhuD R26S mutant with two hemes bound per active site

Chao, A., Goulding, C.W.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

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

Biological Assembly Evidence: fluorescence resonance energy transfer

Macromolecule Content

• Total Structure Weight: 23.61 kDa 
• Atom Count: 1,794 
• Modelled Residue Count: 198 
• Deposited Residue Count: 198 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Heme-degrading monooxygenase HmoB	A, B	99	Mycobacterium tuberculosis H37Rv	Mutation(s): 1  Gene Names: mhuD, Rv3592 EC: 1.14.14.18 (PDB Primary Data), 1.14.99.57 (UniProt)
UniProt
Find proteins for P9WKH3 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)) Explore P9WKH3  Go to UniProtKB:  P9WKH3

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HEM (Subject of Investigation/LOI)	C [auth A], D [auth A], F [auth B], G [auth B]	PROTOPORPHYRIN IX CONTAINING FE C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L
CL	E [auth A], H [auth B]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.227 
• R-Value Work: 0.173 
• R-Value Observed: 0.178 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 38.21	α = 90
b = 68.571	β = 90
c = 74.09	γ = 90

Software Package:

Software Name	Purpose
BOS	data collection
MOSFLM	data reduction
Aimless	data scaling
PHENIX	phasing
PHENIX	refinement
PDB_EXTRACT	data extraction

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2019-06-19 
Deposition Author(s): Chao, A., Goulding, C.W.

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Funding Organization	Location	Grant Number
National Science Foundation (NSF, United States)	United States	DGE-1321846
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	AI095208

Revision History  

• Version 1.0: 2019-06-19
  Type: Initial release
  
• Version 1.1: 2019-11-27
  Changes: Author supporting evidence
• Version 1.2: 2023-10-11
  Changes: Data collection, Database references, Refinement description