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- PDB-7p1q: Structure of KDNase from Trichophyton Rubrum in complex with 2-ke... -

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Basic information

Entry
Database: PDB / ID: 7p1q
TitleStructure of KDNase from Trichophyton Rubrum in complex with 2-keto-3-deoxynononic acid
ComponentsExtracellular sialidase/neuraminidase
KeywordsCARBOHYDRATE / Carbohydrate Metabolism / Enzyme Structure / Protein Structure / KDN / KDNase / Sialic Acid / Sialidase
Function / homology
Function and homology information


ganglioside catabolic process / oligosaccharide catabolic process / exo-alpha-sialidase / exo-alpha-sialidase activity / intracellular membrane-bounded organelle / metal ion binding / membrane / cytoplasm
Similarity search - Function
BNR repeat-like domain / Sialidase family / Sialidase / Sialidase superfamily
Similarity search - Domain/homology
deamino-alpha-neuraminic acid / exo-alpha-sialidase
Similarity search - Component
Biological speciesTrichophyton rubrum (fungus)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 0.91 Å
AuthorsGloster, T.M. / McMahon, S.A.
CitationJournal: Acs Chem.Biol. / Year: 2021
Title: Kinetic and Structural Characterization of Sialidases (Kdnases) from Ascomycete Fungal Pathogens.
Authors: Nejatie, A. / Steves, E. / Gauthier, N. / Baker, J. / Nesbitt, J. / McMahon, S.A. / Oehler, V. / Thornton, N.J. / Noyovitz, B. / Khazaei, K. / Byers, B.W. / Zandberg, W.F. / Gloster, T.M. / ...Authors: Nejatie, A. / Steves, E. / Gauthier, N. / Baker, J. / Nesbitt, J. / McMahon, S.A. / Oehler, V. / Thornton, N.J. / Noyovitz, B. / Khazaei, K. / Byers, B.W. / Zandberg, W.F. / Gloster, T.M. / Moore, M.M. / Bennet, A.J.
History
DepositionJul 2, 2021Deposition site: PDBE / Processing site: PDBE
Revision 1.0Oct 20, 2021Provider: repository / Type: Initial release
Revision 1.1May 4, 2022Group: Data collection / Database references / Category: citation / citation_author / diffrn_source
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _diffrn_source.pdbx_synchrotron_site
Revision 1.2Jan 31, 2024Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Extracellular sialidase/neuraminidase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)43,1125
Polymers42,2151
Non-polymers8974
Water8,917495
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area200 Å2
ΔGint0 kcal/mol
Surface area14470 Å2
MethodPISA
Unit cell
Length a, b, c (Å)62.922, 74.472, 161.365
Angle α, β, γ (deg.)90.000, 90.000, 90.000
Int Tables number20
Space group name H-MC2221

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Components

#1: Protein Extracellular sialidase/neuraminidase


Mass: 42214.945 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Trichophyton rubrum (fungus) / Gene: A7C99_5399 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: A0A178EUH2
#2: Sugar ChemComp-KDM / deamino-alpha-neuraminic acid / alpha-deaminoneuraminic acid / 3-deoxy-D-glycero-alpha-D-galacto-non-2-ulopyranosonic acid / sialic acid / (2R,4S,5R,6R)-2,4,5-TRIHYDROXY-6-[(1R,2R)-1,2,3-TRIHYDROXYPROPYL]OXANE-2-CARBOXYLIC-ACID


Type: D-saccharide, alpha linking / Mass: 268.218 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Formula: C9H16O9 / Feature type: SUBJECT OF INVESTIGATION
IdentifierTypeProgram
DKdnpaCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
2-keto-3-deoxy-a-D-nonulopyranosic acidCOMMON NAMEGMML 1.0
a-D-KdnpIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
KdnSNFG CARBOHYDRATE SYMBOLGMML 1.0
#3: Chemical ChemComp-GOL / GLYCEROL / GLYCERIN / PROPANE-1,2,3-TRIOL


Mass: 92.094 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C3H8O3
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 495 / Source method: isolated from a natural source / Formula: H2O
Has ligand of interestY

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 2.25 Å3/Da / Density % sol: 45.4 %
Crystal growTemperature: 293 K / Method: vapor diffusion, sitting drop / pH: 8 / Details: 25% PEG 1500, 0.1M MMT pH8

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Data collection

DiffractionMean temperature: 173 K / Serial crystal experiment: N
Diffraction sourceSource: SYNCHROTRON / Site: Diamond / Beamline: I04-1 / Wavelength: 0.9159 Å
DetectorType: DECTRIS PILATUS 6M-F / Detector: PIXEL / Date: Dec 16, 2018
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.9159 Å / Relative weight: 1
ReflectionResolution: 0.91→80.69 Å / Num. obs: 226869 / % possible obs: 84.3 % / Redundancy: 5.2 % / CC1/2: 0.999 / Rrim(I) all: 0.048 / Net I/σ(I): 14.6
Reflection shellResolution: 0.91→0.93 Å / Num. unique obs: 2960 / CC1/2: 0.534 / Rrim(I) all: 0.821

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Processing

Software
NameVersionClassification
REFMAC5.8.0218refinement
PDB_EXTRACT3.25data extraction
xia2data reduction
xia2data scaling
PHASERphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 2xzj

2xzj


Resolution: 0.91→80.68 Å / Cor.coef. Fo:Fc: 0.98 / Cor.coef. Fo:Fc free: 0.976 / SU B: 0.64 / SU ML: 0.015 / Cross valid method: THROUGHOUT / σ(F): 0 / ESU R: 0.019 / ESU R Free: 0.02 / Stereochemistry target values: MAXIMUM LIKELIHOOD
Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS U VALUES : REFINED INDIVIDUALLY
RfactorNum. reflection% reflectionSelection details
Rfree0.1556 11219 4.9 %RANDOM
Rwork0.1403 ---
obs0.1411 215570 84.32 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK
Displacement parametersBiso max: 115.39 Å2 / Biso mean: 11 Å2 / Biso min: 4.58 Å2
Baniso -1Baniso -2Baniso -3
1--1.09 Å20 Å20 Å2
2--0.78 Å20 Å2
3---0.31 Å2
Refinement stepCycle: final / Resolution: 0.91→80.68 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms2938 0 60 509 3507
Biso mean--14.17 24.46 -
Num. residues----383
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0120.023200
X-RAY DIFFRACTIONr_bond_other_d0.0030.022853
X-RAY DIFFRACTIONr_angle_refined_deg1.5651.9624371
X-RAY DIFFRACTIONr_angle_other_deg0.8783.0056661
X-RAY DIFFRACTIONr_dihedral_angle_1_deg7.2175415
X-RAY DIFFRACTIONr_dihedral_angle_2_deg31.74223.286140
X-RAY DIFFRACTIONr_dihedral_angle_3_deg10.75415507
X-RAY DIFFRACTIONr_dihedral_angle_4_deg15.3031528
X-RAY DIFFRACTIONr_chiral_restr0.1010.2471
X-RAY DIFFRACTIONr_gen_planes_refined0.010.0213650
X-RAY DIFFRACTIONr_gen_planes_other0.0020.02665
X-RAY DIFFRACTIONr_rigid_bond_restr4.81736053
X-RAY DIFFRACTIONr_sphericity_free23.075315
X-RAY DIFFRACTIONr_sphericity_bonded11.40156160
LS refinement shellResolution: 0.91→0.934 Å / Rfactor Rfree error: 0 / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.325 141 -
Rwork0.332 2829 -
all-2970 -
obs--15.01 %

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