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- PDB-1dhk: STRUCTURE OF PORCINE PANCREATIC ALPHA-AMYLASE -

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Basic information

Entry
Database: PDB / ID: 1dhk
TitleSTRUCTURE OF PORCINE PANCREATIC ALPHA-AMYLASE
Components
  • BEAN LECTIN-LIKE INHIBITOR
  • PORCINE PANCREATIC ALPHA-AMYLASE
KeywordsCOMPLEX (HYDROLASE/INHIBITOR) / PANCREATIC ALPHA-AMYLASE / PORCINE / LECTIN-LIKE INHIBITOR / COMPLEX (HYDROLASE-INHIBITOR) / COMPLEX (HYDROLASE-INHIBITOR) complex
Function / homology
Function and homology information


alpha-amylase inhibitor activity / alpha-amylase / alpha-amylase activity / carbohydrate catabolic process / chloride ion binding / carbohydrate binding / carbohydrate metabolic process / calcium ion binding / extracellular space
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 / Legume lectin / Legume lectin, alpha chain, conserved site / Legume lectins alpha-chain signature. / Legume lectins beta-chain signature. / Legume lectin domain ...Alpha-amylase, C-terminal domain / Aamy_C / Alpha-amylase/branching enzyme, C-terminal all beta / Alpha amylase, C-terminal all-beta domain / Alpha amylase / Legume lectin / Legume lectin, alpha chain, conserved site / Legume lectins alpha-chain signature. / Legume lectins beta-chain signature. / Legume lectin domain / Legume lectin domain / Legume lectin, beta chain, Mn/Ca-binding site / : / Alpha amylase, catalytic domain / Glycosyl hydrolase, family 13, catalytic domain / Alpha-amylase domain / Golgi alpha-mannosidase II / Jelly Rolls - #200 / Glycosyl hydrolase, all-beta / Glycosidases / Concanavalin A-like lectin/glucanase domain superfamily / Glycoside hydrolase superfamily / Jelly Rolls / TIM Barrel / Alpha-Beta Barrel / Immunoglobulin-like / Sandwich / Mainly Beta / Alpha Beta
Similarity search - Domain/homology
Pancreatic alpha-amylase / Alpha-amylase inhibitor 1
Similarity search - Component
Biological speciesSus scrofa (pig)
Phaseolus vulgaris (common bean)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.85 Å
AuthorsBompard-Gilles, C. / Payan, F.
Citation
Journal: Structure / Year: 1996
Title: Substrate mimicry in the active center of a mammalian alpha-amylase: structural analysis of an enzyme-inhibitor complex.
Authors: Bompard-Gilles, C. / Rousseau, P. / Rouge, P. / Payan, F.
#1: Journal: Acta Crystallogr.,Sect.D / Year: 1996
Title: Crystallization and Preliminary X-Ray Analysis of Pig Pancreatic Alpha-Amylase in Complex with a Bean Lectin-Like Inhibitor
Authors: Gilles, C. / Rousseau, P. / Rouge, P. / Payan, F.
#2: Journal: Biochemistry / Year: 1994
Title: The Active Center of a Mammalian Alpha-Amylase. Structure of the Complex of a Pancreatic Alpha-Amylase with a Carbohydrate Inhibitor Refined to 2.2-A Resolution
Authors: Qian, M. / Haser, R. / Buisson, G. / Duee, E. / Payan, F.
#3: Journal: J.Mol.Biol. / Year: 1993
Title: Structure and Molecular Model Refinement of Pig Pancreatic Alpha-Amylase at 2.1 A Resolution
Authors: Qian, M. / Haser, R. / Payan, F.
History
DepositionOct 14, 1996Processing site: BNL
Revision 1.0Dec 24, 1997Provider: repository / Type: Initial release
Revision 1.1Mar 24, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Non-polymer description / Version format compliance
Revision 2.0Dec 25, 2019Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Polymer sequence
Category: diffrn_source / entity_poly ...diffrn_source / entity_poly / pdbx_struct_mod_residue / struct_conn / struct_ref_seq_dif
Item: _diffrn_source.pdbx_synchrotron_site / _entity_poly.pdbx_seq_one_letter_code_can ..._diffrn_source.pdbx_synchrotron_site / _entity_poly.pdbx_seq_one_letter_code_can / _pdbx_struct_mod_residue.parent_comp_id / _struct_conn.pdbx_leaving_atom_flag / _struct_ref_seq_dif.details
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 / struct_asym / struct_conn / struct_site / struct_site_gen
Item: _atom_site.B_iso_or_equiv / _atom_site.Cartn_x ..._atom_site.B_iso_or_equiv / _atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_asym_id / _atom_site.auth_atom_id / _atom_site.auth_comp_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _atom_site.label_atom_id / _atom_site.label_comp_id / _atom_site.label_entity_id / _atom_site.type_symbol / _chem_comp.name / _chem_comp.type / _pdbx_entity_nonpoly.entity_id / _pdbx_entity_nonpoly.name / _pdbx_struct_assembly_gen.asym_id_list / _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.ptnr2_label_asym_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.conn_type_id / _struct_conn.id / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.pdbx_role / _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 / _struct_conn.ptnr2_label_seq_id
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 3.1Apr 3, 2024Group: Data collection / Database references ...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
Item: _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession
Revision 3.2Oct 23, 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: PORCINE PANCREATIC ALPHA-AMYLASE
B: BEAN LECTIN-LIKE INHIBITOR
hetero molecules


Theoretical massNumber of molelcules
Total (without water)81,4409
Polymers80,2142
Non-polymers1,2267
Water5,801322
1
A: PORCINE PANCREATIC ALPHA-AMYLASE
B: BEAN LECTIN-LIKE INHIBITOR
hetero molecules

A: PORCINE PANCREATIC ALPHA-AMYLASE
B: BEAN LECTIN-LIKE INHIBITOR
hetero molecules


Theoretical massNumber of molelcules
Total (without water)162,87918
Polymers160,4284
Non-polymers2,45114
Water724
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation2_655-x+1,y,-z1
Unit cell
Length a, b, c (Å)151.600, 79.400, 68.000
Angle α, β, γ (deg.)90.00, 91.54, 90.00
Int Tables number5
Space group name H-MC121
DetailsALPHA-AI IS A DIMERIC MOLECULE (I2) CONSISTING OF TWO IDENTICAL SUBUNITS. IT BINDS TWO AMYLASE MOLECULES (2E) TO FORM A DIMERIC COMPLEX E2I2. HOWEVER, THE CRYSTALLOGRAPHIC ASYMMETRIC UNIT CORRESPONDS TO HALF THE COMPLEX MOLECULE (EI). IN THIS ENTRY, COORDINATES FOR ALL ATOMS ARE PROVIDED FOR ONE CHAIN OF AMYLASE AND ONE CHAIN OF ALPHA-AI.

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Components

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Protein , 2 types, 2 molecules AB

#1: Protein PORCINE PANCREATIC ALPHA-AMYLASE / PPA


Mass: 55400.699 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / Organ: PANCREAS / References: UniProt: P00690, alpha-amylase
#2: Protein BEAN LECTIN-LIKE INHIBITOR


Mass: 24813.146 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Phaseolus vulgaris (common bean) / Organ: SEED / References: UniProt: P02873

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Sugars , 2 types, 3 molecules

#3: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}LINUCSPDB-CARE
#6: Sugar ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Non-polymers , 3 types, 326 molecules

#4: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: Ca
#5: Chemical ChemComp-CL / CHLORIDE ION


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


Mass: 18.015 Da / Num. of mol.: 322 / Source method: isolated from a natural source / Formula: H2O

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Details

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: 2.8 Å3/Da / Density % sol: 56 %
Crystal grow
*PLUS
pH: 5 / Method: vapor diffusion, hanging drop
Details: drop solution was mixed with an equal volume of reservoir solution
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-ID
115 mg/mlenzyme1drop
20.1 Msodium acetate1reservoir
320 %MPD1reservoir

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Data collection

DiffractionMean temperature: 293 K
Diffraction sourceSource: SYNCHROTRON / Site: EMBL/DESY, HAMBURG / Beamline: X11 / Wavelength: 0.928
DetectorType: MAR scanner 180 mm plate / Detector: IMAGE PLATE / Date: Oct 15, 1995
RadiationMonochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.928 Å / Relative weight: 1
ReflectionNum. obs: 66769 / % possible obs: 96.7 % / Observed criterion σ(I): 1 / Redundancy: 3 % / Rmerge(I) obs: 0.05 / Net I/σ(I): 14.8
Reflection shellResolution: 1.85→1.92 Å / Rmerge(I) obs: 0.406 / Mean I/σ(I) obs: 2 / % possible all: 98.4
Reflection
*PLUS
Highest resolution: 1.85 Å / Lowest resolution: 35 Å
Reflection shell
*PLUS
% possible obs: 98.4 %

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Processing

Software
NameVersionClassification
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
X-PLOR3.1refinement
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PPA NATIVE AND LECTIN FROM SEEDS OF LATHYRUS OCHRUS

Resolution: 1.85→8 Å / σ(F): 0
RfactorNum. reflection% reflection
Rfree0.22 -10 %
Rwork0.183 --
obs0.183 66557 -
Displacement parametersBiso mean: 23.7 Å2
Refine analyzeLuzzati coordinate error obs: 0.2 Å / Luzzati sigma a obs: 0.22 Å
Refinement stepCycle: LAST / Resolution: 1.85→8 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms5429 0 74 322 5825
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_bond_d0.01
X-RAY DIFFRACTIONx_bond_d_na
X-RAY DIFFRACTIONx_bond_d_prot
X-RAY DIFFRACTIONx_angle_d
X-RAY DIFFRACTIONx_angle_d_na
X-RAY DIFFRACTIONx_angle_d_prot
X-RAY DIFFRACTIONx_angle_deg1.48
X-RAY DIFFRACTIONx_angle_deg_na
X-RAY DIFFRACTIONx_angle_deg_prot
X-RAY DIFFRACTIONx_dihedral_angle_d
X-RAY DIFFRACTIONx_dihedral_angle_d_na
X-RAY DIFFRACTIONx_dihedral_angle_d_prot
X-RAY DIFFRACTIONx_improper_angle_d
X-RAY DIFFRACTIONx_improper_angle_d_na
X-RAY DIFFRACTIONx_improper_angle_d_prot
X-RAY DIFFRACTIONx_mcbond_it
X-RAY DIFFRACTIONx_mcangle_it
X-RAY DIFFRACTIONx_scbond_it
X-RAY DIFFRACTIONx_scangle_it

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