Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 6-mer - A2B2C2 Pseudo Symmetry: Cyclic - C2  (3D View)
Pseudo Stoichiometry: Hetero 6-mer -A4B2 

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

Macromolecule Content

• Total Structure Weight: 252578.14 
• Atom Count: 17388 
• Residue Count: 2172 
• Unique protein chains: 3

1FZI

METHANE MONOOXYGENASE HYDROXYLASE, FORM I PRESSURIZED WITH XENON GAS

• DOI: 10.2210/pdb1FZI/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Methylococcus capsulatus (strain ATCC 33009 / NCIMB 11132 / Bath)


• Deposited: 2000-10-03 Released: 2001-04-27 
• Deposition Author(s): Whittington, D.A., Rosenzweig, A.C., Frederick, C.A., Lippard, S.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.3 Å
• R-Value Free: 0.253 
• R-Value Work: 0.223 

Literature

Xenon and halogenated alkanes track putative substrate binding cavities in the soluble methane monooxygenase hydroxylase.

Whittington, D.A., Rosenzweig, A.C., Frederick, C.A., Lippard, S.J.

(2001) Biochemistry 40: 3476-3482

• PubMed: 11297413 
• Primary Citation of Related Structures:  
  1FZH, 1FZ8, 1FZ9


• PubMed Abstract: 
  

To investigate the role of protein cavities in facilitating movement of the substrates, methane and dioxygen, in the soluble methane monooxygenase hydroxylase (MMOH), we determined the X-ray structures of MMOH from Methylococcus capsulatus (Bath) cocrystallized with dibromomethane or iodoethane, or by using crystals pressurized with xenon gas. The halogenated alkanes bind in two cavities within the alpha-subunit that extend from one surface of the protein to the buried dinuclear iron active site. Two additional binding sites were located in the beta-subunit. Pressurization of two crystal forms of MMOH with xenon resulted in the identification of six binding sites located exclusively in the alpha-subunit. These results indicate that hydrophobic species bind preferentially in preexisting cavities in MMOH and support the hypothesis that such cavities may play a functional role in sequestering and enhancing the availability of the physiological substrates for reaction at the active site.

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Organizational Affiliation: 

Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
METHANE MONOOXYGENASE COMPONENT A, ALPHA CHAIN	A, B	527	Methylococcus capsulatus (strain ATCC 33009 / NCIMB 11132 / Bath)	Mutation(s): 0  Gene Names: mmoX EC: 1.14.13.25
Find proteins for P22869 (Methylococcus capsulatus (strain ATCC 33009 / NCIMB 11132 / Bath)) Go to UniProtKB:  P22869

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
METHANE MONOOXYGENASE COMPONENT A, BETA CHAIN	C, D	389	Methylococcus capsulatus (strain ATCC 33009 / NCIMB 11132 / Bath)	Mutation(s): 0  Gene Names: mmoY EC: 1.14.13.25
Find proteins for P18798 (Methylococcus capsulatus (strain ATCC 33009 / NCIMB 11132 / Bath)) Go to UniProtKB:  P18798

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details
METHANE MONOOXYGENASE COMPONENT A, GAMMA CHAIN	E, F	170	Methylococcus capsulatus (strain ATCC 33009 / NCIMB 11132 / Bath)	Mutation(s): 0  Gene Names: mmoZ EC: 1.14.13.25
Find proteins for P11987 (Methylococcus capsulatus (strain ATCC 33009 / NCIMB 11132 / Bath)) Go to UniProtKB:  P11987

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
FE	A, B	FE (III) ION Fe VTLYFUHAOXGGBS-UHFFFAOYSA-N
XE	A, B	XENON Xe FHNFHKCVQCLJFQ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.3 Å
• R-Value Free: 0.253 
• R-Value Work: 0.223 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 61.700	α = 90.00
b = 109.600	β = 90.00
c = 330.200	γ = 90.00

Software Package:

Software Name	Purpose
CNS	phasing
DENZO	data reduction
CNS	refinement
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-10-03 
• Released Date: 2001-04-27 
• Deposition Author(s): Whittington, D.A., Rosenzweig, A.C., Frederick, C.A., Lippard, S.J.

Revision History 

• Version 1.0: 2001-04-27
  Type: Initial release
• Version 1.1: 2008-04-27
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance