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- PDB-3ij9: Directed 'in situ' Elongation as a Strategy to Characterize the C... -

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Basic information

Entry
Database: PDB / ID: 3ij9
TitleDirected 'in situ' Elongation as a Strategy to Characterize the Covalent Glycosyl-Enzyme Catalytic Intermediate of Human Pancreatic a-Amylase
ComponentsPancreatic alpha-amylase
KeywordsHYDROLASE / amylase / covalent intermediate / hydrolytic cleavage / catalysis / inhibitor synthesis / enzyme kinetics / human digestion / diabetes / obesity / Carbohydrate metabolism / Chloride / Disulfide bond / Glycoprotein / Glycosidase / Metal-binding / Pyrrolidone carboxylic acid / Secreted
Function / homology
Function and homology information


polysaccharide digestion / Digestion of dietary carbohydrate / alpha-amylase / carbohydrate catabolic process / alpha-amylase activity / chloride ion binding / carbohydrate metabolic process / calcium ion binding / extracellular space / extracellular exosome / extracellular region
Similarity search - Function
Alpha-amylase, C-terminal domain / Aamy_C / Alpha-amylase/branching enzyme, C-terminal all beta / Alpha amylase, C-terminal all-beta domain / Alpha amylase / Alpha amylase, catalytic domain / Glycosyl hydrolase, family 13, catalytic domain / Alpha-amylase domain / Golgi alpha-mannosidase II / Glycosyl hydrolase, all-beta ...Alpha-amylase, C-terminal domain / Aamy_C / Alpha-amylase/branching enzyme, C-terminal all beta / Alpha amylase, C-terminal all-beta domain / Alpha amylase / Alpha amylase, catalytic domain / Glycosyl hydrolase, family 13, catalytic domain / Alpha-amylase domain / Golgi alpha-mannosidase II / Glycosyl hydrolase, all-beta / Glycosidases / Glycoside hydrolase superfamily / TIM Barrel / Alpha-Beta Barrel / Immunoglobulin-like / Sandwich / Mainly Beta / Alpha Beta
Similarity search - Domain/homology
Chem-B0D / Pancreatic alpha-amylase
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.85 Å
AuthorsLi, C. / Zhang, R. / Withers, S.G. / Brayer, G.D.
CitationJournal: Biochemistry / Year: 2009
Title: Directed "in situ" inhibitor elongation as a strategy to structurally characterize the covalent glycosyl-enzyme intermediate of human pancreatic alpha-amylase
Authors: Zhang, R. / Li, C. / Williams, L.K. / Rempel, B.P. / Brayer, G.D. / Withers, S.G.
History
DepositionAug 4, 2009Deposition site: RCSB / Processing site: RCSB
Revision 1.0Oct 27, 2009Provider: repository / Type: Initial release
Revision 1.1Jul 13, 2011Group: Version format compliance
Revision 1.2Jan 24, 2018Group: Structure summary / Category: audit_author / Item: _audit_author.name
Revision 2.0Dec 25, 2019Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Polymer sequence
Category: chem_comp / entity_poly ...chem_comp / entity_poly / pdbx_struct_mod_residue / struct_conn / struct_ref_seq_dif
Item: _chem_comp.type / _entity_poly.pdbx_seq_one_letter_code_can ..._chem_comp.type / _entity_poly.pdbx_seq_one_letter_code_can / _pdbx_struct_mod_residue.parent_comp_id / _struct_conn.pdbx_leaving_atom_flag
Revision 3.0Jul 29, 2020Group: Advisory / Atomic model ...Advisory / Atomic model / Data collection / Derived calculations / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / database_PDB_caveat / entity / pdbx_branch_scheme / pdbx_chem_comp_identifier / pdbx_entity_branch / pdbx_entity_branch_descriptor / pdbx_entity_branch_link / pdbx_entity_branch_list / pdbx_entity_nonpoly / pdbx_nonpoly_scheme / pdbx_struct_assembly_gen / pdbx_struct_conn_angle / pdbx_validate_chiral / struct_asym / struct_conn / struct_site / struct_site_gen
Item: _atom_site.auth_asym_id / _atom_site.auth_atom_id ..._atom_site.auth_asym_id / _atom_site.auth_atom_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _atom_site.label_atom_id / _atom_site.label_entity_id / _chem_comp.name / _chem_comp.type / _pdbx_struct_assembly_gen.asym_id_list / _pdbx_struct_conn_angle.ptnr1_label_asym_id / _pdbx_struct_conn_angle.ptnr2_label_asym_id / _pdbx_struct_conn_angle.ptnr3_label_asym_id / _pdbx_validate_chiral.auth_asym_id / _pdbx_validate_chiral.auth_seq_id / _struct_conn.conn_type_id / _struct_conn.id / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.ptnr1_auth_asym_id / _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_asym_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
Description: Carbohydrate remediation / Provider: repository / Type: Remediation

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Pancreatic alpha-amylase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)56,7676
Polymers55,9311
Non-polymers8365
Water5,531307
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
MethodPISA
Unit cell
Length a, b, c (Å)52.380, 68.000, 129.950
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number19
Space group name H-MP212121

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Components

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Protein , 1 types, 1 molecules A

#1: Protein Pancreatic alpha-amylase / PA / 1 / 4-alpha-D-glucan glucanohydrolase


Mass: 55931.305 Da / Num. of mol.: 1 / Fragment: human pancreatic alpha-amylase
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: AMY2A / Production host: PICHIA PASTORIS (fungus) / References: UniProt: P04746, alpha-amylase

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Sugars , 2 types, 3 molecules

#2: Polysaccharide beta-D-glucopyranose-(1-2)-5-fluoro-alpha-L-idopyranose


Type: oligosaccharide / Mass: 360.287 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
WURCS=2.0/2,2,1/[a2125h-1a_1-5_5*F][a2122h-1b_1-5]/1-2/a4-b1WURCSPDB2Glycan 1.1.0
[][L-1-deoxy-Idop]{[(4+1)][a-D-Glcp]{}}LINUCSPDB-CARE
#3: Sugar ChemComp-B0D / (2R,3S,4R,5R,6R)-2,6-difluoro-2-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol


Type: L-saccharide / Mass: 200.137 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Formula: C6H10F2O5

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Non-polymers , 3 types, 309 molecules

#4: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Ca
#5: Chemical ChemComp-CL / CHLORIDE ION / Chloride


Mass: 35.453 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Cl
#6: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 307 / 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: 2.07 Å3/Da / Density % sol: 40.55 %
Crystal growTemperature: 298 K / Method: vapor diffusion, hanging drop / pH: 7.5
Details: 60% 2-methylpentane-2, 4-diol and 100 mM cacodylate, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 298.0K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: SSRL / Beamline: BL11-1 / Wavelength: 0.98 Å
DetectorType: ADSC QUANTUM 315r / Detector: CCD
RadiationMonochromator: Flat mirror (vertical focusing); single crystal Si(111) bent monochromator (horizontal focusing)
Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.98 Å / Relative weight: 1
ReflectionResolution: 1.85→33.38 Å / Num. all: 40467 / Num. obs: 40346 / % possible obs: 99.7 % / Observed criterion σ(F): 3 / Observed criterion σ(I): 3 / Rmerge(I) obs: 0.07

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Processing

Software
NameClassification
HKL-2000data collection
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling
CNSphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT / Resolution: 1.85→33.38 Å / σ(F): 3 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.207 2017 -RANDOM
Rwork0.184 ---
all-40467 --
obs-40346 99.7 %-
Refinement stepCycle: LAST / Resolution: 1.85→33.38 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3946 0 51 307 4304
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.006
X-RAY DIFFRACTIONc_angle_deg1.02

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