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- PDB-1dds: MOLECULE: DIHYDROFOLATE REDUCTASE (E.C.1.5.1.3) COMPLEXED WITH ME... -

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Basic information

Entry
Database: PDB / ID: 1dds
TitleMOLECULE: DIHYDROFOLATE REDUCTASE (E.C.1.5.1.3) COMPLEXED WITH METHOTREXATE
ComponentsDIHYDROFOLATE REDUCTASE
KeywordsOXIDOREDUCTASE / OXIDO-REDUCTASE
Function / homology
Function and homology information


methotrexate binding / dihydrofolic acid binding / 10-formyltetrahydrofolate biosynthetic process / response to methotrexate / NADP+ binding / folic acid biosynthetic process / folic acid binding / dihydrofolate metabolic process / dihydrofolate reductase / dihydrofolate reductase activity ...methotrexate binding / dihydrofolic acid binding / 10-formyltetrahydrofolate biosynthetic process / response to methotrexate / NADP+ binding / folic acid biosynthetic process / folic acid binding / dihydrofolate metabolic process / dihydrofolate reductase / dihydrofolate reductase activity / folic acid metabolic process / NADPH binding / tetrahydrofolate biosynthetic process / one-carbon metabolic process / NADP binding / response to xenobiotic stimulus / response to antibiotic / cytosol
Similarity search - Function
Dihydrofolate reductase / Dihydrofolate Reductase, subunit A / Dihydrofolate Reductase, subunit A / Dihydrofolate reductase conserved site / Dihydrofolate reductase (DHFR) domain signature. / Dihydrofolate reductase (DHFR) domain profile. / Dihydrofolate reductase domain / Dihydrofolate reductase / Dihydrofolate reductase-like domain superfamily / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
METHOTREXATE / Dihydrofolate reductase
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
MethodX-RAY DIFFRACTION / Resolution: 2.2 Å
AuthorsYennawar, H.P. / Farber, G.K.
CitationJournal: Protein Sci. / Year: 1997
Title: The effect of denaturants on protein structure.
Authors: Dunbar, J. / Yennawar, H.P. / Banerjee, S. / Luo, J. / Farber, G.K.
History
DepositionJun 29, 1995Processing site: BNL
Revision 1.0Oct 15, 1995Provider: repository / Type: Initial release
Revision 1.1Mar 24, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Feb 7, 2024Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Other / Structure summary
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_database_status / struct_conn / struct_keywords / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_database_status.process_site / _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.ptnr1_symmetry / _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 / _struct_conn.ptnr2_symmetry / _struct_keywords.text / _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

Downloads & links

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Assembly

Deposited unit
A: DIHYDROFOLATE REDUCTASE
B: DIHYDROFOLATE REDUCTASE
hetero molecules


Theoretical massNumber of molelcules
Total (without water)37,0597
Polymers36,0392
Non-polymers1,0205
Water2,180121
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)93.181, 93.185, 73.886
Angle α, β, γ (deg.)90.00, 90.00, 120.00
Int Tables number169
Space group name H-MP61
Atom site foot note1: GLY A 95 - GLY A 96 OMEGA = 359.57 PEPTIDE BOND DEVIATES SIGNIFICANTLY FROM TRANS CONFORMATION
2: GLY B 95 - GLY B 96 OMEGA = 1.14 PEPTIDE BOND DEVIATES SIGNIFICANTLY FROM TRANS CONFORMATION

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Components

#1: Protein DIHYDROFOLATE REDUCTASE


Mass: 18019.340 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli) / Strain (production host): B / References: UniProt: P0ABQ4, dihydrofolate reductase
#2: Chemical ChemComp-CL / CHLORIDE ION


Mass: 35.453 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Cl
#3: Chemical ChemComp-MTX / METHOTREXATE


Mass: 454.439 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C20H22N8O5
#4: Chemical ChemComp-CA / CALCIUM ION


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


Mass: 18.015 Da / Num. of mol.: 121 / Source method: isolated from a natural source / Formula: H2O

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION

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Sample preparation

CrystalDensity Matthews: 2.57 Å3/Da / Density % sol: 52.1 %
Crystal grow
*PLUS
Temperature: 4 ℃ / pH: 6.8 / Method: vapor diffusion, hanging drop
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-ID
10.5 ML-histidine1drop
20.5 Mcalcium acetate1drop
30.1 MTris1reservoir
46.5 %(v/v)ethanol1reservoir

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Data collection

Diffraction sourceWavelength: 1.54
DetectorType: RIGAKU AFC-6R / Detector: DIFFRACTOMETER / Date: Dec 1, 1993
RadiationMonochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.54 Å / Relative weight: 1
ReflectionResolution: 2.2→30 Å / Num. obs: 22503 / % possible obs: 100 % / Observed criterion σ(F): 0 / Redundancy: 1 % / Rmerge(I) obs: 0.072
Reflection
*PLUS
Num. all: 22503 / Num. obs: 11006 / Observed criterion σ(F): 2 / Rmerge(I) obs: 0.09

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Processing

Software
NameVersionClassification
X-PLOR3.1model building
X-PLOR3.1refinement
TEXSANdata reduction
X-PLOR3.1phasing
RefinementResolution: 2.2→30 Å / σ(F): 2
RfactorNum. reflection% reflection
Rfree0.2 --
Rwork0.177 --
obs0.177 10604 51.3 %
Displacement parametersBiso mean: 13.04 Å2
Refinement stepCycle: LAST / Resolution: 2.2→30 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms2503 0 69 121 2693
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_bond_d0.013
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_deg1.92
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
Software
*PLUS
Name: X-PLOR / Version: 3.1 / Classification: refinement
Refinement
*PLUS
Rfactor obs: 0.172 / Rfactor Rfree: 0.171 / % reflection Rfree: 10 %
Solvent computation
*PLUS
Displacement parameters
*PLUS

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