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- PDB-1mfu: Probing the role of a mobile loop in human salivary amylase: Stru... -

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Basic information

Entry
Database: PDB / ID: 1mfu
TitleProbing the role of a mobile loop in human salivary amylase: Structural studies on the loop-deleted mutant
Componentsalpha-amylase, Salivary
KeywordsHYDROLASE / amylase / acarbose complex / mutageneis / mobile loop / deletion mutant
Function / homology
Function and homology information


Digestion of dietary carbohydrate / oligosaccharide metabolic process / alpha-amylase / alpha-amylase activity / chloride ion binding / carbohydrate metabolic process / calcium ion binding / extracellular space / extracellular exosome
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
alpha-maltose / alpha-D-glucopyranose / 5-HYDROXYMETHYL-CHONDURITOL / Alpha-amylase 1B / Alpha-amylase 1C
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2 Å
AuthorsRamasubbu, N. / Ragunath, C. / Mishra, P.J.
CitationJournal: J.Mol.Biol. / Year: 2003
Title: Probing the role of a mobile loop in substrate binding and enzyme activity of human salivary amylase.
Authors: Ramasubbu, N. / Ragunath, C. / Mishra, P.J.
History
DepositionAug 13, 2002Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 20, 2002Provider: repository / Type: Initial release
Revision 1.1Apr 28, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Oct 11, 2017Group: Advisory / Data collection / Category: pdbx_unobs_or_zero_occ_atoms / reflns_shell
Item: _pdbx_unobs_or_zero_occ_atoms.label_asym_id / _reflns_shell.number_unique_all / _reflns_shell.percent_possible_all
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 / _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 / entity_name_com / 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_molecule_features / pdbx_nonpoly_scheme / pdbx_struct_assembly_gen / pdbx_struct_conn_angle / pdbx_unobs_or_zero_occ_atoms / pdbx_validate_chiral / 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_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 / _pdbx_unobs_or_zero_occ_atoms.auth_asym_id / _pdbx_unobs_or_zero_occ_atoms.auth_seq_id / _pdbx_unobs_or_zero_occ_atoms.label_asym_id / _pdbx_unobs_or_zero_occ_atoms.label_seq_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 / _struct_conn.ptnr2_label_seq_id
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 3.1Dec 21, 2022Group: Database references / Derived calculations / Structure summary
Category: chem_comp / database_2 ...chem_comp / database_2 / struct_conn / struct_ref_seq_dif
Item: _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI ..._chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_conn.pdbx_leaving_atom_flag / _struct_ref_seq_dif.details
Revision 3.2Sep 20, 2023Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model
Revision 3.3Oct 9, 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, Salivary
hetero molecules


Theoretical massNumber of molelcules
Total (without water)58,73213
Polymers55,6421
Non-polymers3,09012
Water5,224290
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)52.074, 73.815, 135.787
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 alpha-amylase, Salivary


Mass: 55641.945 Da / Num. of mol.: 1 / Mutation: deletion of residues 306 through 310
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Plasmid: pVL1392 / Production host: Spodoptera frugiperda (fall armyworm)
References: UniProt: P04745, UniProt: P0DTE8*PLUS, alpha-amylase

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Sugars , 4 types, 6 molecules

#2: Polysaccharide 4-amino-4,6-dideoxy-alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose


Type: oligosaccharide / Mass: 325.313 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DQuip[4N]a1-4DGlcpa1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/2,2,1/[a2122h-1a_1-5][a2122m-1a_1-5_4*N]/1-2/a4-b1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-Glcp]{[(4+1)][a-D-6-deoxy-Glcp4N]{}}LINUCSPDB-CARE
#3: Polysaccharide 4-amino-4,6-dideoxy-alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose


Type: oligosaccharide / Mass: 487.454 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DQuip[4N]a1-4DGlcpa1-4DGlcpa1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/2,3,2/[a2122h-1a_1-5][a2122m-1a_1-5_4*N]/1-1-2/a4-b1_b4-c1WURCSPDB2Glycan 1.1.0
[][b-D-Glcp]{[(4+1)][a-D-Glcp]{[(4+1)][a-D-6-deoxy-Glcp4N]{}}}LINUCSPDB-CARE
#4: Polysaccharide alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose / alpha-maltose


Type: oligosaccharide, Oligosaccharide / Class: Nutrient / Mass: 342.297 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Details: oligosaccharide / References: alpha-maltose
DescriptorTypeProgram
DGlcpa1-4DGlcpa1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1a_1-5]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-Glcp]{[(4+1)][a-D-Glcp]{}}LINUCSPDB-CARE
#6: Sugar ChemComp-GLC / alpha-D-glucopyranose / alpha-D-glucose / D-glucose / glucose


Type: D-saccharide, alpha linking / Mass: 180.156 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Formula: C6H12O6
IdentifierTypeProgram
DGlcpaCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
a-D-glucopyranoseCOMMON NAMEGMML 1.0
a-D-GlcpIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Non-polymers , 4 types, 296 molecules

#5: Chemical
ChemComp-HMC / 5-HYDROXYMETHYL-CHONDURITOL


Mass: 176.167 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Formula: C7H12O5
#7: Chemical ChemComp-CA / CALCIUM ION


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


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


Mass: 18.015 Da / Num. of mol.: 290 / 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: 2.34 Å3/Da / Density % sol: 47.53 %
Crystal growTemperature: 298 K
Method: soaking with acarbose at 1 mm concentration for 24 hours
pH: 9
Details: 40% mpd, pH 9.0, soaking with acarbose at 1 mM concentration for 24 hours, temperature 298K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: CHESS / Beamline: F1 / Wavelength: 0.91 Å
DetectorType: ADSC QUANTUM 4 / Detector: CCD / Date: Mar 31, 2002 / Details: monochromator
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.91 Å / Relative weight: 1
ReflectionResolution: 2→26.54 Å / Num. all: 35031 / Num. obs: 35031 / % possible obs: 96.8 % / Observed criterion σ(F): 1 / Observed criterion σ(I): 1 / Redundancy: 4.8 % / Biso Wilson estimate: 25.6 Å2 / Rmerge(I) obs: 0.06 / Rsym value: 0.06 / Net I/σ(I): 24.5
Reflection shellResolution: 2→2.07 Å / Rmerge(I) obs: 0.267 / Mean I/σ(I) obs: 7 / Num. unique all: 3488 / Rsym value: 0.267

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Processing

Software
NameVersionClassification
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
REFMAC5.1.24refinement
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB entry 1jxk

1jxk


Resolution: 2→26.54 Å / Cor.coef. Fo:Fc: 0.964 / Cor.coef. Fo:Fc free: 0.943 / Cross valid method: THROUGHOUT / σ(F): 0 / Stereochemistry target values: MAXIMUM LIKELIHOOD
RfactorNum. reflection% reflectionSelection details
Rfree0.20109 1746 5 %RANDOM
Rwork0.16011 ---
all0.1622 35031 --
obs0.16226 33226 96.86 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.4 Å / Solvent model: BABINET MODEL WITH MASK
Displacement parametersBiso mean: 25.789 Å2
Baniso -1Baniso -2Baniso -3
1-0 Å20 Å20 Å2
2--0 Å20 Å2
3---0 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.151 Å0.175 Å
Refinement stepCycle: LAST / Resolution: 2→26.54 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3924 0 199 290 4413
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0130.0214254
X-RAY DIFFRACTIONr_angle_refined_deg1.3681.9655775
X-RAY DIFFRACTIONr_dihedral_angle_1_deg6.2545490
X-RAY DIFFRACTIONr_chiral_restr0.0960.2625
X-RAY DIFFRACTIONr_gen_planes_refined0.0060.023236
X-RAY DIFFRACTIONr_nbd_refined0.20.22019
X-RAY DIFFRACTIONr_xyhbond_nbd_refined0.1390.2287
X-RAY DIFFRACTIONr_metal_ion_refined0.0770.24
X-RAY DIFFRACTIONr_symmetry_vdw_refined0.1990.245
X-RAY DIFFRACTIONr_symmetry_hbond_refined0.1420.218
X-RAY DIFFRACTIONr_mcbond_it0.6911.52430
X-RAY DIFFRACTIONr_mcangle_it1.26523911
X-RAY DIFFRACTIONr_scbond_it2.04131824
X-RAY DIFFRACTIONr_scangle_it2.9974.51864
LS refinement shellResolution: 2.001→2.052 Å / Total num. of bins used: 20 /
RfactorNum. reflection
Rfree0.258 111
Rwork0.189 2437

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