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- PDB-1kgu: THREE DIMENSIONAL STRUCTURE ANALYSIS OF THE R337A VARIANT OF HUMA... -

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Basic information

Entry
Database: PDB / ID: 1kgu
TitleTHREE DIMENSIONAL STRUCTURE ANALYSIS OF THE R337A VARIANT OF HUMAN PANCREATIC ALPHA-AMYLASE
ComponentsALPHA-AMYLASE, PANCREATIC
KeywordsHYDROLASE / ALPHA-AMYLASE / CHLORIDE BINDING / PICHIA PASTORIS / MUTAGENESIS / CATALYSIS / PANCREATIC / ENZYME / HUMAN
Function / homology
Function and homology information


polysaccharide digestion / Digestion of dietary carbohydrate / alpha-amylase / Developmental Lineage of Pancreatic Acinar Cells / alpha-amylase activity / carbohydrate catabolic process / chloride ion binding / carbohydrate metabolic process / calcium ion binding / extracellular space ...polysaccharide digestion / Digestion of dietary carbohydrate / alpha-amylase / Developmental Lineage of Pancreatic Acinar Cells / alpha-amylase activity / carbohydrate catabolic process / 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
Pancreatic alpha-amylase
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 2 Å
AuthorsNumao, S. / Maurus, R. / Sidhu, G. / Wang, Y. / Overall, C.M. / Brayer, G.D. / Withers, S.G.
CitationJournal: Biochemistry / Year: 2002
Title: Probing the role of the chloride ion in the mechanism of human pancreatic alpha-amylase.
Authors: Numao, S. / Maurus, R. / Sidhu, G. / Wang, Y. / Overall, C.M. / Brayer, G.D. / Withers, S.G.
History
DepositionNov 28, 2001Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jan 16, 2002Provider: repository / Type: Initial release
Revision 1.1Apr 27, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 2.0Dec 25, 2019Group: Database references / Derived calculations / Polymer sequence
Category: entity_poly / pdbx_struct_mod_residue ...entity_poly / pdbx_struct_mod_residue / struct_conn / struct_ref_seq_dif
Item: _entity_poly.pdbx_seq_one_letter_code_can / _pdbx_struct_mod_residue.parent_comp_id / _struct_conn.pdbx_leaving_atom_flag
Revision 2.1Oct 27, 2021Group: Database references / Derived calculations
Category: database_2 / pdbx_struct_conn_angle ...database_2 / pdbx_struct_conn_angle / struct_conn / struct_ref_seq_dif / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _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 / _struct_ref_seq_dif.details / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id
Revision 2.2Aug 16, 2023Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model
Revision 2.3Oct 16, 2024Group: Structure summary / Category: pdbx_entry_details / pdbx_modification_feature

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: ALPHA-AMYLASE, PANCREATIC
hetero molecules


Theoretical massNumber of molelcules
Total (without water)55,8852
Polymers55,8451
Non-polymers401
Water3,963220
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)53.062, 74.984, 137.108
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 ALPHA-AMYLASE, PANCREATIC / 1 / 4-ALPHA-D-GLUCAN GLUCANOHYDROLASE / PANCREATIC ALPHA-AMYLASE / PA


Mass: 55845.188 Da / Num. of mol.: 1 / Mutation: R377A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Pichia pastoris (fungus) / References: UniProt: P04746, alpha-amylase
#2: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Ca
#3: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 220 / Source method: isolated from a natural source / Formula: H2O
Has protein modificationY

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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: 2.44 Å3/Da / Density % sol: 49.61 %
Crystal growTemperature: 298 K / Method: vapor diffusion, hanging drop / Details: VAPOR DIFFUSION, HANGING DROP, temperature 298K
Crystal grow
*PLUS
pH: 7.5 / Details: Brayer, G.D., (2000) Biochemistry, 39, 4778.
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-ID
160 %MPD1reservoir
2100 mMcacodylate1reservoir
32 mg/mlprotein1drop

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Data collection

DiffractionMean temperature: 298 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RU300 / Wavelength: 1.5418 / Wavelength: 1.5418 Å
DetectorType: RIGAKU RAXIS IIC / Detector: IMAGE PLATE / Date: Jul 9, 1999 / Details: MIRRORS
RadiationMonochromator: MIRRORS / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 1.9→30 Å / Num. all: 44090 / Num. obs: 44090 / % possible obs: 93 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 3.7 % / Rmerge(I) obs: 0.071 / Net I/σ(I): 19.4
Reflection
*PLUS
Highest resolution: 1.9 Å / Lowest resolution: 30 Å / % possible obs: 93 % / Redundancy: 3.7 % / Num. measured all: 285470
Reflection shell
*PLUS
Highest resolution: 2 Å / Lowest resolution: 2.07 Å / Redundancy: 1.9 % / Rmerge(I) obs: 0.108 / Mean I/σ(I) obs: 9.3

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Processing

Software
NameVersionClassification
DENZOdata reduction
SCALEPACKdata scaling
X-PLORmodel building
X-PLOR3.851refinement
X-PLORphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 1BSI

1bsi


Resolution: 2→10 Å / Isotropic thermal model: ISOTROPIC / σ(F): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflection
Rwork0.193 --
all0.193 36985 -
obs0.193 36985 93 %
Displacement parametersBiso mean: 20.9 Å2
Refine analyzeLuzzati coordinate error obs: 0.21 Å
Refinement stepCycle: LAST / Resolution: 2→10 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3940 0 1 220 4161
Software
*PLUS
Name: X-PLOR / Version: 3.851 / Classification: refinement
Refinement
*PLUS
Solvent computation
*PLUS
Displacement parameters
*PLUS
Biso mean: 20.9 Å2
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_bond_d0.005
X-RAY DIFFRACTIONx_angle_d
X-RAY DIFFRACTIONx_angle_deg1.004

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