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- PDB-1am6: CARBONIC ANHYDRASE II INHIBITOR: ACETOHYDROXAMATE -

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Basic information

Entry
Database: PDB / ID: 1am6
TitleCARBONIC ANHYDRASE II INHIBITOR: ACETOHYDROXAMATE
ComponentsCARBONIC ANHYDRASE
KeywordsHYDROLASE / CO2 HYDRATION
Function / homology
Function and homology information


positive regulation of cellular pH reduction / positive regulation of dipeptide transmembrane transport / regulation of monoatomic anion transport / secretion / cyanamide hydratase / cyanamide hydratase activity / arylesterase activity / regulation of chloride transport / Reversible hydration of carbon dioxide / angiotensin-activated signaling pathway ...positive regulation of cellular pH reduction / positive regulation of dipeptide transmembrane transport / regulation of monoatomic anion transport / secretion / cyanamide hydratase / cyanamide hydratase activity / arylesterase activity / regulation of chloride transport / Reversible hydration of carbon dioxide / angiotensin-activated signaling pathway / positive regulation of synaptic transmission, GABAergic / regulation of intracellular pH / morphogenesis of an epithelium / carbonic anhydrase / carbonate dehydratase activity / carbon dioxide transport / Erythrocytes take up oxygen and release carbon dioxide / Erythrocytes take up carbon dioxide and release oxygen / neuron cellular homeostasis / one-carbon metabolic process / apical part of cell / myelin sheath / extracellular exosome / zinc ion binding / plasma membrane / cytosol / cytoplasm
Similarity search - Function
Carbonic Anhydrase II / Alpha carbonic anhydrase / Carbonic anhydrase, alpha-class, conserved site / Alpha-carbonic anhydrases signature. / Carbonic anhydrase, alpha-class / Alpha carbonic anhydrase domain / Alpha carbonic anhydrase domain superfamily / Eukaryotic-type carbonic anhydrase / Alpha-carbonic anhydrases profile. / Eukaryotic-type carbonic anhydrase ...Carbonic Anhydrase II / Alpha carbonic anhydrase / Carbonic anhydrase, alpha-class, conserved site / Alpha-carbonic anhydrases signature. / Carbonic anhydrase, alpha-class / Alpha carbonic anhydrase domain / Alpha carbonic anhydrase domain superfamily / Eukaryotic-type carbonic anhydrase / Alpha-carbonic anhydrases profile. / Eukaryotic-type carbonic anhydrase / Roll / Alpha Beta
Similarity search - Domain/homology
ACETOHYDROXAMIC ACID / : / Carbonic anhydrase 2
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / DIFFERENCE FOURIER / Resolution: 2 Å
AuthorsScolnick, L.R. / Clements, A.M. / Christianson, D.W.
CitationJournal: J.Am.Chem.Soc. / Year: 1997
Title: Novel Binding Mode of Hydroxamate Inhibitors to Human Carbonic Anhydrase II
Authors: Scolnick, L.R. / Clements, A.M. / Liao, J. / Crenshaw, L. / Hellberg, M. / May, J. / Dean, T.R. / Christianson, D.W.
History
DepositionJun 24, 1997Processing site: BNL
Revision 1.0Jun 24, 1998Provider: repository / Type: Initial release
Revision 1.1Mar 3, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Feb 7, 2024Group: Data collection / Database references / Derived calculations
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_struct_conn_angle / struct_conn / 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_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_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_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: CARBONIC ANHYDRASE
hetero molecules


Theoretical massNumber of molelcules
Total (without water)29,4994
Polymers29,1581
Non-polymers3413
Water2,036113
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)42.700, 41.700, 73.000
Angle α, β, γ (deg.)90.00, 92.00, 90.00
Int Tables number4
Space group name H-MP1211

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Components

#1: Protein CARBONIC ANHYDRASE /


Mass: 29157.863 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell: ERYTHROCYTES / Cellular location: CYTOPLASM / References: UniProt: P00918, carbonic anhydrase
#2: Chemical ChemComp-HG / MERCURY (II) ION / Mercury (element)


Mass: 200.590 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Hg
#3: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Zn
#4: Chemical ChemComp-HAE / ACETOHYDROXAMIC ACID / Acetohydroxamic acid


Mass: 75.067 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C2H5NO2 / Comment: inhibitor, medication*YM
#5: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 113 / Source method: isolated from a natural source / Formula: H2O
Nonpolymer detailsTHE STRUCTURE CONTAINS A NOVEL BINDING MODE FOR HYDROXAMATE BOUND TO ZINC.

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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: 2.2 Å3/Da / Density % sol: 55 %
Crystal growpH: 8
Details: PROTEIN WAS CRYSTALLIZED FROM 55 - 75% AMMONIUM SULFATE, 50 MM TRIS-HCL, PH = 8.0; INHIBITOR SOAKED INTO XTAL BY GRADUALLY TRANSFERRING INTO 820 MM
Crystal grow
*PLUS
Method: vapor diffusion, sitting drop
Details: drop solution was mixed with an equal volume of reservoir solution
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-ID
150 mMTris-HCl1drop
250 mMTris/HCl1reservoir
31.95-3.9 Mammonium sulfate1reservoir

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Data collection

DiffractionMean temperature: 298 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RUH2R / Wavelength: 1.5418
DetectorType: RIGAKU RAXIS / Detector: IMAGE PLATE / Date: Dec 1, 1995 / Details: MIRRORS
RadiationMonochromator: NI FILTER / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2.1→12 Å / Num. obs: 15080 / % possible obs: 93.1 % / Observed criterion σ(I): 2 / Redundancy: 2.4 % / Biso Wilson estimate: 16.2 Å2 / Rsym value: 0.045 / Net I/σ(I): 6.4
Reflection shellResolution: 2.1→2.15 Å / Redundancy: 1.6 % / Mean I/σ(I) obs: 5 / Rsym value: 0.11 / % possible all: 92
Reflection
*PLUS
Rmerge(I) obs: 0.045
Reflection shell
*PLUS
% possible obs: 92 % / Rmerge(I) obs: 0.11

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Processing

Software
NameVersionClassification
MOSFLMdata reduction
CCP4data reduction
X-PLOR3.1model building
X-PLOR3.1refinement
CCP4data scaling
X-PLOR3.1phasing
RefinementMethod to determine structure: DIFFERENCE FOURIER / Resolution: 2→6 Å / Rfactor Rfree error: 0.0001 / Data cutoff high absF: 100000 / Data cutoff low absF: 0.1 / Cross valid method: THROUGHOUT / σ(F): 2
RfactorNum. reflection% reflectionSelection details
Rfree0.22 1483 10 %RANDOM
Rwork0.16 ---
obs0.16 14513 93.1 %-
Refine analyzeLuzzati d res low obs: 12 Å / Luzzati sigma a obs: 0.25 Å
Refinement stepCycle: LAST / Resolution: 2→6 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms2640 0 7 148 2795
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_bond_d0.008
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_deg1.6
X-RAY DIFFRACTIONx_angle_deg_na
X-RAY DIFFRACTIONx_angle_deg_prot
X-RAY DIFFRACTIONx_dihedral_angle_d25.2
X-RAY DIFFRACTIONx_dihedral_angle_d_na
X-RAY DIFFRACTIONx_dihedral_angle_d_prot
X-RAY DIFFRACTIONx_improper_angle_d1.4
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
LS refinement shellResolution: 2→2.09 Å / Rfactor Rfree error: 0.003 / Total num. of bins used: 8
RfactorNum. reflection% reflection
Rfree0.267 87 0.085 %
Rwork0.205 933 -
obs--53.8 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PARHCSDX.PROTOPHCSDX.PRO
X-RAY DIFFRACTION2PARAM-CAL.JAN94TOPH-CAL.JAN94
X-RAY DIFFRACTION3TEST2_05_96.PARTEST2.TOP
Software
*PLUS
Name: X-PLOR / Version: 3.1 / Classification: refinement
Refinement
*PLUS
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_dihedral_angle_d
X-RAY DIFFRACTIONx_dihedral_angle_deg25.2
X-RAY DIFFRACTIONx_improper_angle_d
X-RAY DIFFRACTIONx_improper_angle_deg1.4
LS refinement shell
*PLUS
Rfactor obs: 0.205

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