Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 75.29 kDa 
• Atom Count: 4478 
• Modelled Residue Count: 513 
• Deposited Residue Count: 657 
• Unique protein chains: 1

1LW3

Crystal Structure of Myotubularin-related protein 2 complexed with phosphate

• PDB DOI: 10.2210/pdb1LW3/pdb

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2002-05-30 Released: 2003-10-07 
• Deposition Author(s): Begley, M.J., Taylor, G.S., Kim, S.-A., Veine, D.M., Dixon, J.E., Stuckey, J.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.273 
• R-Value Work: 0.209 
• R-Value Observed: 0.250 

Literature

Crystal Structure of a Phosphoinositide Phosphatase, MTMR2: Insights into Myotubular Myopathy and Charcot-Marie-Tooth Syndrome

Begley, M.J., Taylor, G.S., Kim, S.-A., Veine, D.M., Dixon, J.E., Stuckey, J.A.

(2003) Mol Cell 12: 1391-1402

• PubMed: 14690594 
• DOI: 10.1016/s1097-2765(03)00486-6
• Primary Citation of Related Structures:  
  1LW3, 1M7R


• PubMed Abstract: 
  

Myotubularin-related proteins are a large subfamily of protein tyrosine phosphatases (PTPs) that dephosphorylate D3-phosphorylated inositol lipids. Mutations in members of the myotubularin family cause the human neuromuscular disorders myotubular myopathy and type 4B Charcot-Marie-Tooth syndrome. The crystal structure of a representative member of this family, MTMR2, reveals a phosphatase domain that is structurally unique among PTPs. A series of mutants are described that exhibit altered enzymatic activity and provide insight into the specificity of myotubularin phosphatases toward phosphoinositide substrates. The structure also reveals that the GRAM domain, found in myotubularin family phosphatases and predicted to occur in approximately 180 proteins, is part of a larger motif with a pleckstrin homology (PH) domain fold. Finally, the MTMR2 structure will serve as a model for other members of the myotubularin family and provide a framework for understanding the mechanism whereby mutations in these proteins lead to disease.

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Organizational Affiliation: 

Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI 48109, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Myotubularin-related protein 2	A	657	Homo sapiens	Mutation(s): 1  Gene Names: MTMR2, KIAA1073 EC: 3.1.3.64 (PDB Primary Data), 3.1.3.95 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for Q13614 (Homo sapiens) Explore Q13614  Go to UniProtKB:  Q13614
PHAROS:  Q13614

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PO4	B [auth A], C [auth A], D [auth A]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.273 
• R-Value Work: 0.209 
• R-Value Observed: 0.250 
• Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 66.08	α = 90
b = 66.08	β = 90
c = 261.41	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-05-30 
• Released Date: 2003-10-07 
Deposition Author(s): Begley, M.J., Taylor, G.S., Kim, S.-A., Veine, D.M., Dixon, J.E., Stuckey, J.A.

Revision History  

• Version 1.0: 2003-10-07
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2021-10-27
  Changes: Database references, Derived calculations