4XWH

Crystal structure of the human N-acetyl-alpha-glucosaminidase

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.32 Å
  • R-Value Free: 0.186 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.167 

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This is version 2.0 of the entry. See complete history. 


Literature

Structural characterization of the alpha-N-acetylglucosaminidase, a key enzyme in the pathogenesis of Sanfilippo syndrome B.

Birrane, G., Dassier, A.L., Romashko, A., Lundberg, D., Holmes, K., Cottle, T., Norton, A.W., Zhang, B., Concino, M.F., Meiyappan, M.

(2019) J Struct Biol 205: 65-71

  • DOI: 10.1016/j.jsb.2019.02.005
  • Primary Citation of Related Structures:  
    4XWH

  • PubMed Abstract: 

    • Mucopolysaccharidosis III B (MPS III-B) is a rare lysosomal storage disorder caused by deficiencies in Alpha-N-acetylglucosaminidase (NAGLU) for which there is currently no cure, and present treatment is largely supportive. Understanding the structure of NAGLU may allow for identification of novel therapeutic targets for MPS III-B ...

    Mucopolysaccharidosis III B (MPS III-B) is a rare lysosomal storage disorder caused by deficiencies in Alpha-N-acetylglucosaminidase (NAGLU) for which there is currently no cure, and present treatment is largely supportive. Understanding the structure of NAGLU may allow for identification of novel therapeutic targets for MPS III-B. Here we describe the first crystal structure of human NAGLU, determined to a resolution of 2.3 Å. The crystal structure reveals a novel homotrimeric configuration, maintained primarily by hydrophobic and electrostatic interactions via domain II of three contiguous domains from the N- to C-terminus. The active site cleft is located between domains II and III. Catalytic glutamate residues, E316 and E446, are located at the top of the (α/β) 8 barrel structure in domain II. We utilized the three-dimensional structure of NAGLU to map several MPS III-B mutations, and hypothesize their functional consequences. Revealing atomic level structural information about this critical lysosomal enzyme paves the way for the design of novel therapeutics to target the underlying causes of MPS III-B.

    Organizational Affiliation: 

    Discovery Therapeutics, Research-US, Takeda Pharmaceutical Company Limited, 125 Binney St., Cambridge, MA 02142, United States. Electronic address: muthu.meiyappan@takeda.com.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Alpha-N-acetylglucosaminidaseA720Homo sapiensMutation(s): 0 
Gene Names: NAGLU, UFHSD1
EC: 3.2.1.50
UniProt & NIH Common Fund Data Resources
Find proteins for P54802 (Homo sapiens)
Explore P54802 
Go to UniProtKB:  P54802
PHAROS:  P54802
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP54802
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 2
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseB 3N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G15407YE
GlyCosmos:  G15407YE
GlyGen:  G15407YE
Entity ID: 3
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseC, D 2N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
NEP
Query on NEP		A L-PEPTIDE LINKINGC6 H10 N3 O5 PHIS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.32 Å
  • R-Value Free: 0.186 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.167 
  • Space Group: P 63
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 205.088α = 90
b = 205.088β = 90
c = 78.398γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
CBASSdata collection
HKL-2000data scaling
PHASERphasing
HKL-2000data reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-02-03
    Type: Initial release
  • Version 1.1: 2017-11-22
    Changes: Derived calculations, Refinement description
  • Version 1.2: 2019-07-17
    Changes: Data collection, Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary