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- PDB-2bf6: Atomic Resolution Structure of the bacterial sialidase NanI from ... -

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Basic information

Entry
Database: PDB / ID: 2bf6
TitleAtomic Resolution Structure of the bacterial sialidase NanI from Clostridium perfringens in complex with alpha-Sialic Acid (Neu5Ac).
ComponentsEXO-ALPHA-SIALIDASE
KeywordsHYDROLASE / SIALIDASE / CLOSTRIDIUM PERFRINGENS / SIALIC ACID
Function / homology
Function and homology information


ganglioside catabolic process / oligosaccharide catabolic process / exo-alpha-(2->3)-sialidase activity / exo-alpha-(2->6)-sialidase activity / exo-alpha-(2->8)-sialidase activity / exo-alpha-sialidase / intracellular membrane-bounded organelle / membrane / metal ion binding / cytoplasm
Similarity search - Function
BNR repeat-like domain / Intramolecular trans-sialidase; domain 3 / Intramolecular Trans-sialidase; Domain 3 / Trans-sialidase, domain 3 / Glycoside hydrolase, family 33, N-terminal / Sialidase, N-terminal domain / BNR repeat-like domain / Sialidase family / Sialidase / Neuraminidase - #10 ...BNR repeat-like domain / Intramolecular trans-sialidase; domain 3 / Intramolecular Trans-sialidase; Domain 3 / Trans-sialidase, domain 3 / Glycoside hydrolase, family 33, N-terminal / Sialidase, N-terminal domain / BNR repeat-like domain / Sialidase family / Sialidase / Neuraminidase - #10 / Sialidase superfamily / 6 Propeller / Neuraminidase / Concanavalin A-like lectin/glucanase domain superfamily / Beta Barrel / Mainly Beta
Similarity search - Domain/homology
N-acetyl-alpha-neuraminic acid / exo-alpha-sialidase
Similarity search - Component
Biological speciesClostridium perfringens (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 0.97 Å
AuthorsNewstead, S. / Taylor, G.L.
CitationJournal: J.Biol.Chem. / Year: 2008
Title: The Structure of Clostridium Perfringens Nani Sialidase and its Catalytic Intermediates.
Authors: Newstead, S.L. / Potter, J.A. / Wilson, J.C. / Xu, G. / Chien, C.H. / Watts, A.G. / Withers, S.G. / Taylor, G.L.
History
DepositionDec 4, 2004Deposition site: PDBE / Processing site: PDBE
Revision 1.0Mar 9, 2006Provider: repository / Type: Initial release
Revision 1.1May 8, 2011Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Mar 7, 2018Group: Advisory / Source and taxonomy / Category: entity_src_gen / pdbx_unobs_or_zero_occ_atoms
Item: _entity_src_gen.pdbx_gene_src_scientific_name / _entity_src_gen.pdbx_host_org_ncbi_taxonomy_id ..._entity_src_gen.pdbx_gene_src_scientific_name / _entity_src_gen.pdbx_host_org_ncbi_taxonomy_id / _entity_src_gen.pdbx_host_org_scientific_name / _entity_src_gen.pdbx_host_org_strain / _entity_src_gen.pdbx_host_org_variant
Revision 1.4May 22, 2019Group: Data collection / Refinement description / Category: refine / Item: _refine.pdbx_ls_cross_valid_method
Revision 1.5Jul 29, 2020Group: Data collection / Derived calculations ...Data collection / Derived calculations / Other / Structure summary
Category: chem_comp / entity ...chem_comp / entity / pdbx_chem_comp_identifier / pdbx_database_status / pdbx_entity_nonpoly / pdbx_struct_conn_angle / struct_conn / struct_site / struct_site_gen
Item: _chem_comp.name / _chem_comp.type ..._chem_comp.name / _chem_comp.type / _entity.pdbx_description / _pdbx_database_status.status_code_sf / _pdbx_entity_nonpoly.name / _pdbx_struct_conn_angle.ptnr1_auth_comp_id / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr1_label_asym_id / _pdbx_struct_conn_angle.ptnr1_label_atom_id / _pdbx_struct_conn_angle.ptnr1_label_comp_id / _pdbx_struct_conn_angle.ptnr1_label_seq_id / _pdbx_struct_conn_angle.ptnr3_auth_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_asym_id / _pdbx_struct_conn_angle.ptnr3_label_atom_id / _pdbx_struct_conn_angle.ptnr3_label_comp_id / _pdbx_struct_conn_angle.ptnr3_label_seq_id / _pdbx_struct_conn_angle.value / _struct_conn.pdbx_dist_value / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id / _struct_conn.ptnr2_label_seq_id
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 1.6Dec 13, 2023Group: Advisory / Data collection ...Advisory / Data collection / Database references / Refinement description / Structure summary
Category: chem_comp / chem_comp_atom ...chem_comp / chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model / pdbx_unobs_or_zero_occ_atoms
Item: _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession
Remark 700 SHEET THE SHEET STRUCTURE OF THIS MOLECULE IS BIFURCATED. IN ORDER TO REPRESENT THIS FEATURE IN ... SHEET THE SHEET STRUCTURE OF THIS MOLECULE IS BIFURCATED. IN ORDER TO REPRESENT THIS FEATURE IN THE SHEET RECORDS BELOW, TWO SHEETS ARE DEFINED.

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: EXO-ALPHA-SIALIDASE
hetero molecules


Theoretical massNumber of molelcules
Total (without water)50,6656
Polymers50,0911
Non-polymers5745
Water8,737485
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
MethodPQS
Unit cell
Length a, b, c (Å)96.981, 69.413, 72.694
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number19
Space group name H-MP212121

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Components

#1: Protein EXO-ALPHA-SIALIDASE / SIALIDASE


Mass: 50091.492 Da / Num. of mol.: 1 / Fragment: RESIDUES 243-691
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Clostridium perfringens (bacteria) / Production host: Escherichia coli BL21(DE3) (bacteria) / Variant (production host): Rosetta pLySS / References: UniProt: Q59310, exo-alpha-sialidase
#2: Sugar ChemComp-SIA / N-acetyl-alpha-neuraminic acid / N-acetylneuraminic acid / sialic acid / alpha-sialic acid / O-SIALIC ACID


Type: D-saccharide, alpha linking / Mass: 309.270 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Formula: C11H19NO9
IdentifierTypeProgram
DNeup5AcaCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-a-D-neuraminic acidCOMMON NAMEGMML 1.0
a-D-Neup5AcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
Neu5AcSNFG CARBOHYDRATE SYMBOLGMML 1.0
#3: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Ca
#4: Chemical ChemComp-GOL / GLYCEROL / GLYCERIN / PROPANE-1,2,3-TRIOL


Mass: 92.094 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C3H8O3
#5: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 485 / Source method: isolated from a natural source / Formula: H2O

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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: 2.5 Å3/Da / Density % sol: 49 %
Crystal growpH: 7 / Details: 20 % PEG 3350, 0.2M POTASSIUM NITRATE, pH 7.00

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: ESRF / Beamline: ID14-1 / Wavelength: 0.934
DetectorType: ADSC CCD / Detector: CCD / Date: Feb 20, 2004 / Details: MIRRORS
RadiationMonochromator: DIAMOND (111), GE(220) / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.934 Å / Relative weight: 1
ReflectionResolution: 0.97→57 Å / Num. obs: 290992 / % possible obs: 91 % / Redundancy: 3.8 % / Rmerge(I) obs: 0.1 / Net I/σ(I): 11.8
Reflection shellResolution: 0.97→1.03 Å / Redundancy: 3.1 % / Rmerge(I) obs: 0.19 / Mean I/σ(I) obs: 5 / % possible all: 87

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Processing

Software
NameClassification
SHELXL-97refinement
MOSFLMdata reduction
SCALAdata scaling
CNSphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 1SLL

1sll


Resolution: 0.97→57 Å / Num. parameters: 36804 / Num. restraintsaints: 44962 / Cross valid method: FREE R-VALUE / σ(F): 0 / Stereochemistry target values: ENGH AND HUBER
Details: ANISOTROPIC REFINEMENT REDUCED FREE R (NO CUTOFF) BY 2.0
RfactorNum. reflection% reflectionSelection details
Rfree0.1331 13089 4.9 %RANDOM
all0.1133 264777 --
obs0.1134 -91.8 %-
Refine analyzeNum. disordered residues: 11 / Occupancy sum hydrogen: 3285.2 / Occupancy sum non hydrogen: 4037.5
Refinement stepCycle: LAST / Resolution: 0.97→57 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3524 0 35 485 4044
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONs_bond_d0.016
X-RAY DIFFRACTIONs_angle_d0.031
X-RAY DIFFRACTIONs_similar_dist0
X-RAY DIFFRACTIONs_from_restr_planes0.0348
X-RAY DIFFRACTIONs_zero_chiral_vol0.103
X-RAY DIFFRACTIONs_non_zero_chiral_vol0.11
X-RAY DIFFRACTIONs_anti_bump_dis_restr0.081
X-RAY DIFFRACTIONs_rigid_bond_adp_cmpnt0.006
X-RAY DIFFRACTIONs_similar_adp_cmpnt0.032
X-RAY DIFFRACTIONs_approx_iso_adps0.092

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