6PKG | pdb_00006pkg

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 (Depositor), 0.208 (DCC) 
  • R-Value Work: 
    0.183 (Depositor), 0.186 (DCC) 
  • R-Value Observed: 
    0.184 (Depositor) 

wwPDB Validation 3D Report Full Report

Validation slider image for 6PKG

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 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.

Macromolecule Content 

  • Total Structure Weight: 83.17 kDa 
  • Atom Count: 5,215 
  • Modeled Residue Count: 614 
  • Deposited Residue Count: 642 
  • Unique protein chains: 1

Macromolecules

Find similar proteins by:|  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
Expand
Reference Sequence

Oligosaccharides

Help  
Entity ID: 2
MoleculeChains Length2D Diagram GlycosylationD 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 (Depositor), 0.208 (DCC) 
  • R-Value Work:  0.183 (Depositor), 0.186 (DCC) 
  • R-Value Observed: 0.184 (Depositor) 
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

View Full Validation Report



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