6PKG

Zebrafish N-acetylglucosamine-1-phosphodiester alpha-N-acetylglucosaminidase (NAGPA) catalytic domain auto-inhibited by pro-peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.184 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 2.1 of the entry. See complete history


Literature

Crystal Structure of the Mannose-6-Phosphate Uncovering Enzyme.

Gorelik, A.Illes, K.Nagar, B.

(2020) Structure 28: 426-436.e3

  • DOI: https://doi.org/10.1016/j.str.2020.02.001
  • Primary Citation of Related Structures:  
    6PKG, 6PKH, 6PKI, 6PKU, 6PKY, 6U11

  • PubMed Abstract: 

    Most lysosomal hydrolytic enzymes reach their destination via the mannose-6-phosphate (M6P) pathway. The enzyme N-acetylglucosamine-1-phosphodiester α-N-acetylglucosaminidase (NAGPA, or "uncovering enzyme") catalyzes the second step in the M6P tag formation, namely the removal of the masking N-acetylglucosamine (GlcNAc) portion. Defects in this protein are associated with non-syndromic stuttering. To gain a better understanding of the function and regulation of this enzyme, we determined its crystal structure. The propeptide binds in a groove on the globular catalytic domain, blocking active site access. High-affinity substrate binding is enabled by a conformational switch in an active site loop. The protein recognizes the GlcNAc and phosphate portions of its substrate, but not the mannose moiety of the glycan. Based on enzymatic and 1 H-NMR analysis, a catalytic mechanism is proposed. Crystallographic and solution scattering analyses suggest that the C-terminal domain forms a long flexible stem that extends the enzyme away from the Golgi membrane.


  • Organizational Affiliation

    Department of Biochemistry, McGill University, Room 464, 3649 Promenade Sir-William-Osler, Montreal, QC H3G 0B1, Canada.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
N-acetylglucosamine-1-phosphodiester alpha-N-acetylglucosaminidase
A, B
321Danio rerioMutation(s): 0 
Gene Names: nagpa
UniProt
Find proteins for F1QSF9 (Danio rerio)
Explore F1QSF9 
Go to UniProtKB:  F1QSF9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupF1QSF9
Glycosylation
Glycosylation Sites: 2
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose
C
6N-Glycosylation
Glycosylation Resources
GlyTouCan:  G82348BZ
GlyCosmos:  G82348BZ
GlyGen:  G82348BZ
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
P6G
Query on P6G

Download Ideal Coordinates CCD File 
IA [auth A]HEXAETHYLENE GLYCOL
C12 H26 O7
IIRDTKBZINWQAW-UHFFFAOYSA-N
I2I
Query on I2I

Download Ideal Coordinates CCD File 
AA [auth A]
BA [auth A]
CA [auth A]
DA [auth A]
EA [auth A]
AA [auth A],
BA [auth A],
CA [auth A],
DA [auth A],
EA [auth A],
FA [auth A],
GA [auth A],
HA [auth A],
LB [auth B],
MB [auth B],
NB [auth B],
OB [auth B],
PB [auth B],
QB [auth B],
RB [auth B]
molecular iodine
I2
PNDPGZBMCMUPRI-UHFFFAOYSA-N
NAG
Query on NAG

Download Ideal Coordinates CCD File 
D [auth A],
JA [auth B],
KA [auth B]
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
IOD
Query on IOD

Download Ideal Coordinates CCD File 
AB [auth B]
BB [auth B]
CB [auth B]
DB [auth B]
E [auth A]
AB [auth B],
BB [auth B],
CB [auth B],
DB [auth B],
E [auth A],
EB [auth B],
F [auth A],
FB [auth B],
G [auth A],
GB [auth B],
H [auth A],
HB [auth B],
I [auth A],
IB [auth B],
J [auth A],
JB [auth B],
K [auth A],
KB [auth B],
L [auth A],
LA [auth B],
M [auth A],
MA [auth B],
N [auth A],
NA [auth B],
O [auth A],
OA [auth B],
P [auth A],
PA [auth B],
Q [auth A],
QA [auth B],
R [auth A],
RA [auth B],
S [auth A],
SA [auth B],
T [auth A],
TA [auth B],
U [auth A],
UA [auth B],
V [auth A],
VA [auth B],
W [auth A],
WA [auth B],
X [auth A],
XA [auth B],
Y [auth A],
YA [auth B],
Z [auth A],
ZA [auth B]
IODIDE ION
I
XMBWDFGMSWQBCA-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.184 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 124.356α = 90
b = 124.356β = 90
c = 278.792γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
AutoSolphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Canadian Institutes of Health Research (CIHR)CanadaMOP-133535

Revision History  (Full details and data files)

  • Version 1.0: 2020-02-19
    Type: Initial release
  • Version 1.1: 2020-03-11
    Changes: Database references
  • Version 1.2: 2020-04-15
    Changes: Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary
  • Version 2.1: 2024-10-16
    Changes: Data collection, Database references, Derived calculations, Structure summary