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- PDB-9fpt: Crystal structure of carbonic anhydrase II with methyl 4-chloro-3... -

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Basic information

Entry
Database: PDB / ID: 9fpt
TitleCrystal structure of carbonic anhydrase II with methyl 4-chloro-3-sulfamoyl-benzoate
ComponentsCarbonic anhydrase 2
KeywordsLYASE / DRUG DESIGN / CARBONIC ANHYDRASE / BENZENESULFONAMIDE / LYASE-LYASE INHIBITOR COMPLEX
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 activity / cyanamide hydratase / arylesterase activity / regulation of chloride transport / Reversible hydration of carbon dioxide / morphogenesis of an epithelium ...positive regulation of cellular pH reduction / positive regulation of dipeptide transmembrane transport / regulation of monoatomic anion transport / secretion / cyanamide hydratase activity / cyanamide hydratase / arylesterase activity / regulation of chloride transport / Reversible hydration of carbon dioxide / morphogenesis of an epithelium / angiotensin-activated signaling pathway / regulation of intracellular pH / positive regulation of synaptic transmission, GABAergic / 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 / apical part of cell / myelin sheath / extracellular exosome / zinc ion binding / plasma membrane / cytosol / cytoplasm
Similarity search - Function
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
Similarity search - Domain/homology
: / Carbonic anhydrase 2
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.18 Å
AuthorsSmirnov, A. / Manakova, E.N. / Grazulis, S. / Paketuryte, V.
Funding support1items
OrganizationGrant numberCountry
Not funded
CitationJournal: J.Med.Chem. / Year: 2025
Title: Affinity and Selectivity of Protein-Ligand Recognition: A Minor Chemical Modification Changes Carbonic Anhydrase Binding Profile.
Authors: Zaksauskas, A. / Paketuryte-Latve, V. / Jankunaite, A. / Capkauskaite, E. / Becart, Y. / Smirnov, A. / Pospisilova, K. / Leitans, J. / Brynda, J. / Kazaks, A. / Baranauskiene, L. / Manakova, ...Authors: Zaksauskas, A. / Paketuryte-Latve, V. / Jankunaite, A. / Capkauskaite, E. / Becart, Y. / Smirnov, A. / Pospisilova, K. / Leitans, J. / Brynda, J. / Kazaks, A. / Baranauskiene, L. / Manakova, E. / Grazulis, S. / Kairys, V. / Tars, K. / Rezacova, P. / Matulis, D.
History
DepositionJun 13, 2024Deposition site: PDBE / Processing site: PDBE
Revision 1.0Jun 25, 2025Provider: repository / Type: Initial release
Revision 1.1Oct 8, 2025Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Carbonic anhydrase 2
hetero molecules


Theoretical massNumber of molelcules
Total (without water)29,8686
Polymers29,2891
Non-polymers5795
Water4,306239
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area600 Å2
ΔGint-4 kcal/mol
Surface area11330 Å2
MethodPISA
Unit cell
Length a, b, c (Å)42.126, 40.928, 71.710
Angle α, β, γ (deg.)90.00, 103.99, 90.00
Int Tables number4
Space group name H-MP1211

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Components

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Protein , 1 types, 1 molecules A

#1: Protein Carbonic anhydrase 2 / Carbonate dehydratase II / Carbonic anhydrase C / CAC / Carbonic anhydrase II / CA-II


Mass: 29289.062 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CA2 / Plasmid: pET15b / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: P00918, carbonic anhydrase

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Non-polymers , 6 types, 244 molecules

#2: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Zn
#3: Chemical ChemComp-A1IEO / methyl 4-chloranyl-3-sulfamoyl-benzoate


Mass: 249.671 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C8H8ClNO4S / Feature type: SUBJECT OF INVESTIGATION
#4: Chemical ChemComp-NA / SODIUM ION


Mass: 22.990 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Na
#5: Chemical ChemComp-DMS / DIMETHYL SULFOXIDE


Mass: 78.133 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C2H6OS / Comment: DMSO, precipitant*YM
#6: Chemical ChemComp-BCN / BICINE


Mass: 163.172 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C6H13NO4 / Comment: pH buffer*YM
#7: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 239 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestY
Has protein modificationN

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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 Å3/Da / Density % sol: 38 %
Crystal growTemperature: 291 K / Method: vapor diffusion, sitting drop
Details: 0.1M sodium bicine (pH 9) and 2M sodium malonate (pH 7)

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Data collection

DiffractionMean temperature: 100 K / Serial crystal experiment: N
Diffraction sourceSource: SYNCHROTRON / Site: PETRA III, EMBL c/o DESY / Beamline: P13 (MX1) / Wavelength: 0.9797 Å
DetectorType: DECTRIS PILATUS 6M / Detector: PIXEL / Date: Nov 22, 2018
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.9797 Å / Relative weight: 1
ReflectionResolution: 1.18→69.58 Å / Num. obs: 75321 / % possible obs: 96.7 % / Redundancy: 6.8 % / CC1/2: 0.999 / Rmerge(I) obs: 0.041 / Rpim(I) all: 0.019 / Rrim(I) all: 0.05 / Net I/σ(I): 16.9 / Num. measured all: 511224
Reflection shellResolution: 1.18→1.24 Å / % possible obs: 94 % / Redundancy: 6.7 % / Rmerge(I) obs: 0.384 / Num. measured all: 71440 / Num. unique obs: 10647 / CC1/2: 0.939 / Rpim(I) all: 0.173 / Rrim(I) all: 0.456 / Net I/σ(I) obs: 3.5

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Processing

Software
NameVersionClassification
REFMAC5.8.0232refinement
SCALAdata scaling
XDSdata reduction
Cootmodel building
MOLREPphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT / Resolution: 1.18→69.58 Å / Cor.coef. Fo:Fc: 0.98 / Cor.coef. Fo:Fc free: 0.973 / Cross valid method: THROUGHOUT / ESU R: 0.04 / ESU R Free: 0.04 / Stereochemistry target values: MAXIMUM LIKELIHOOD / Details: HYDROGENS HAVE BEEN USED IF PRESENT IN THE INPUT
RfactorNum. reflection% reflectionSelection details
Rfree0.17516 7625 10.1 %RANDOM
Rwork0.1439 ---
obs0.14705 67660 96.37 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.4 Å / Solvent model: MASK
Displacement parametersBiso mean: 22.688 Å2
Baniso -1Baniso -2Baniso -3
1--0.35 Å2-0 Å20.9 Å2
2---0.64 Å20 Å2
3---0.47 Å2
Refinement stepCycle: 1 / Resolution: 1.18→69.58 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms2038 0 32 239 2309
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0160.0122168
X-RAY DIFFRACTIONr_bond_other_d
X-RAY DIFFRACTIONr_angle_refined_deg2.1311.6432952
X-RAY DIFFRACTIONr_angle_other_deg
X-RAY DIFFRACTIONr_dihedral_angle_1_deg7.1865266
X-RAY DIFFRACTIONr_dihedral_angle_2_deg32.29123.679106
X-RAY DIFFRACTIONr_dihedral_angle_3_deg12.33215343
X-RAY DIFFRACTIONr_dihedral_angle_4_deg21.218157
X-RAY DIFFRACTIONr_chiral_restr0.4030.2263
X-RAY DIFFRACTIONr_gen_planes_refined0.0140.021701
X-RAY DIFFRACTIONr_gen_planes_other
X-RAY DIFFRACTIONr_nbd_refined
X-RAY DIFFRACTIONr_nbd_other
X-RAY DIFFRACTIONr_nbtor_refined
X-RAY DIFFRACTIONr_nbtor_other
X-RAY DIFFRACTIONr_xyhbond_nbd_refined
X-RAY DIFFRACTIONr_xyhbond_nbd_other
X-RAY DIFFRACTIONr_metal_ion_refined
X-RAY DIFFRACTIONr_metal_ion_other
X-RAY DIFFRACTIONr_symmetry_vdw_refined
X-RAY DIFFRACTIONr_symmetry_vdw_other
X-RAY DIFFRACTIONr_symmetry_hbond_refined
X-RAY DIFFRACTIONr_symmetry_hbond_other
X-RAY DIFFRACTIONr_symmetry_metal_ion_refined
X-RAY DIFFRACTIONr_symmetry_metal_ion_other
X-RAY DIFFRACTIONr_mcbond_it5.7571.8971055
X-RAY DIFFRACTIONr_mcbond_other
X-RAY DIFFRACTIONr_mcangle_it6.4962.8441324
X-RAY DIFFRACTIONr_mcangle_other
X-RAY DIFFRACTIONr_scbond_it8.6722.2691113
X-RAY DIFFRACTIONr_scbond_other
X-RAY DIFFRACTIONr_scangle_it
X-RAY DIFFRACTIONr_scangle_other
X-RAY DIFFRACTIONr_long_range_B_refined6.46427.1633372
X-RAY DIFFRACTIONr_long_range_B_other
X-RAY DIFFRACTIONr_rigid_bond_restr31.4432168
X-RAY DIFFRACTIONr_sphericity_free27.6845144
X-RAY DIFFRACTIONr_sphericity_bonded22.11652201
LS refinement shellResolution: 1.18→1.211 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.239 532 -
Rwork0.214 4821 -
obs--93.14 %

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