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- PDB-4erm: Crystal structure of the dATP inhibited E. coli class Ia ribonucl... -

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Basic information

Entry
Database: PDB / ID: 4erm
TitleCrystal structure of the dATP inhibited E. coli class Ia ribonucleotide reductase complex at 4 Angstroms resolution
Components(Ribonucleoside-diphosphate reductase 1 subunit ...) x 2
KeywordsOXIDOREDUCTASE / protein-protein complex / alpha/beta barrel / atp cone / di-iron center / RNR alpha / RNR beta / thioredoxin / Ribonucleotide reduction / Cytosol
Function / homology
Function and homology information


ribonucleoside diphosphate metabolic process / 2'-deoxyribonucleotide biosynthetic process / nucleobase-containing small molecule interconversion / ribonucleoside-diphosphate reductase complex / ribonucleoside-diphosphate reductase / ribonucleoside-diphosphate reductase activity, thioredoxin disulfide as acceptor / deoxyribonucleotide biosynthetic process / protein folding chaperone / iron ion binding / ATP binding ...ribonucleoside diphosphate metabolic process / 2'-deoxyribonucleotide biosynthetic process / nucleobase-containing small molecule interconversion / ribonucleoside-diphosphate reductase complex / ribonucleoside-diphosphate reductase / ribonucleoside-diphosphate reductase activity, thioredoxin disulfide as acceptor / deoxyribonucleotide biosynthetic process / protein folding chaperone / iron ion binding / ATP binding / identical protein binding / cytosol / cytoplasm
Similarity search - Function
ATP-cone domain / ATP cone domain / ATP-cone domain profile. / Anaerobic Ribonucleotide-triphosphate Reductase Large Chain / Anaerobic Ribonucleotide-triphosphate Reductase Large Chain - #20 / Ribonucleotide reductase, class I , alpha subunit / Ribonucleotide reductase large subunit signature. / Ribonucleoside-diphosphate reductase large subunit / Ribonucleotide reductase R1 subunit, N-terminal / Ribonucleotide reductase large subunit, N-terminal ...ATP-cone domain / ATP cone domain / ATP-cone domain profile. / Anaerobic Ribonucleotide-triphosphate Reductase Large Chain / Anaerobic Ribonucleotide-triphosphate Reductase Large Chain - #20 / Ribonucleotide reductase, class I , alpha subunit / Ribonucleotide reductase large subunit signature. / Ribonucleoside-diphosphate reductase large subunit / Ribonucleotide reductase R1 subunit, N-terminal / Ribonucleotide reductase large subunit, N-terminal / Ribonucleotide reductase, all-alpha domain / Ribonucleotide reductase large subunit, C-terminal / Ribonucleotide reductase, barrel domain / Ribonucleotide reductase small subunit, acitve site / Ribonucleotide reductase small subunit signature. / Ribonucleotide Reductase, subunit A / Ribonucleotide Reductase, subunit A / Ribonucleotide reductase small subunit / Ribonucleotide reductase small subunit family / Ribonucleotide reductase, small chain / Ribonucleotide reductase-like / Ferritin-like superfamily / Alpha-Beta Barrel / Orthogonal Bundle / Mainly Alpha / Alpha Beta
Similarity search - Domain/homology
2'-DEOXYADENOSINE-5'-DIPHOSPHATE / 2'-DEOXYADENOSINE 5'-TRIPHOSPHATE / MU-OXO-DIIRON / Ribonucleoside-diphosphate reductase 1 subunit alpha / Ribonucleoside-diphosphate reductase 1 subunit beta
Similarity search - Component
Biological speciesEscherichia coli K-12 (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / FOURIER SYNTHESIS / Resolution: 3.95 Å
AuthorsZimanyi, C.M. / Drennan, C.L.
CitationJournal: Structure / Year: 2012
Title: Tangled up in knots: structures of inactivated forms of E. coli class Ia ribonucleotide reductase.
Authors: Christina M Zimanyi / Nozomi Ando / Edward J Brignole / Francisco J Asturias / Joanne Stubbe / Catherine L Drennan /
Abstract: Ribonucleotide reductases (RNRs) provide the precursors for DNA biosynthesis and repair and are successful targets for anticancer drugs such as clofarabine and gemcitabine. Recently, we reported that ...Ribonucleotide reductases (RNRs) provide the precursors for DNA biosynthesis and repair and are successful targets for anticancer drugs such as clofarabine and gemcitabine. Recently, we reported that dATP inhibits E. coli class Ia RNR by driving formation of RNR subunits into α4β4 rings. Here, we present the first X-ray structure of a gemcitabine-inhibited E. coli RNR and show that the previously described α4β4 rings can interlock to form an unprecedented (α4β4)2 megacomplex. This complex is also seen in a higher-resolution dATP-inhibited RNR structure presented here, which employs a distinct crystal lattice from that observed in the gemcitabine-inhibited case. With few reported examples of protein catenanes, we use data from small-angle X-ray scattering and electron microscopy to both understand the solution conditions that contribute to concatenation in RNRs as well as present a mechanism for the formation of these unusual structures.
History
DepositionApr 20, 2012Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 4, 2012Provider: repository / Type: Initial release
Revision 1.1Oct 24, 2012Group: Database references
Revision 1.2Sep 13, 2023Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model / 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_asym_id / _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_auth_asym_id / _pdbx_struct_conn_angle.ptnr2_label_asym_id / _pdbx_struct_conn_angle.ptnr2_label_atom_id / _pdbx_struct_conn_angle.ptnr3_auth_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.pdbx_dist_value / _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_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: Ribonucleoside-diphosphate reductase 1 subunit alpha
B: Ribonucleoside-diphosphate reductase 1 subunit alpha
C: Ribonucleoside-diphosphate reductase 1 subunit alpha
D: Ribonucleoside-diphosphate reductase 1 subunit alpha
E: Ribonucleoside-diphosphate reductase 1 subunit beta
F: Ribonucleoside-diphosphate reductase 1 subunit beta
G: Ribonucleoside-diphosphate reductase 1 subunit beta
H: Ribonucleoside-diphosphate reductase 1 subunit beta
hetero molecules


Theoretical massNumber of molelcules
Total (without water)523,39828
Polymers517,2168
Non-polymers6,18220
Water1448
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area37220 Å2
ΔGint-213 kcal/mol
Surface area150470 Å2
MethodPISA
Unit cell
Length a, b, c (Å)280.471, 155.744, 166.919
Angle α, β, γ (deg.)90.00, 119.07, 90.00
Int Tables number5
Space group name H-MC121

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Components

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Ribonucleoside-diphosphate reductase 1 subunit ... , 2 types, 8 molecules ABCDEFGH

#1: Protein
Ribonucleoside-diphosphate reductase 1 subunit alpha / Protein B1 / Ribonucleoside-diphosphate reductase 1 R1 subunit / Ribonucleotide reductase 1


Mass: 85877.086 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli K-12 (bacteria) / Strain: K12 / Gene: b2234, dnaF, JW2228, nrdA / Production host: Escherichia coli (E. coli)
References: UniProt: P00452, ribonucleoside-diphosphate reductase
#2: Protein
Ribonucleoside-diphosphate reductase 1 subunit beta / Protein B2 / Protein R2 / Ribonucleotide reductase 1


Mass: 43426.863 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli K-12 (bacteria) / Strain: K12 / Gene: b2235, ftsB, JW2229, nrdB / Production host: Escherichia coli (E. coli)
References: UniProt: P69924, ribonucleoside-diphosphate reductase

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Non-polymers , 5 types, 28 molecules

#3: Chemical
ChemComp-DTP / 2'-DEOXYADENOSINE 5'-TRIPHOSPHATE


Mass: 491.182 Da / Num. of mol.: 8 / Source method: obtained synthetically / Formula: C10H16N5O12P3
#4: Chemical
ChemComp-DAT / 2'-DEOXYADENOSINE-5'-DIPHOSPHATE / DADP


Mass: 411.202 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C10H15N5O9P2
#5: Chemical
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Mg
#6: Chemical
ChemComp-FEO / MU-OXO-DIIRON


Mass: 127.689 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Fe2O
#7: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 8 / Source method: isolated from a natural source / Formula: H2O

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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: 3.08 Å3/Da / Density % sol: 60.07 %
Crystal growTemperature: 298 K / Method: vapor diffusion, hanging drop / pH: 7.5
Details: Precipitant conditions: 10% PEG 3350, 0.1 M MOPS pH 7.5, 0.2 M Magnesium Acetate, 0.025 M Magnesium Chloride, 0.006 M n-Nonyl-beta-D-maltopyranoside, and 5% glycerol. Mixed 1:1 with protein. ...Details: Precipitant conditions: 10% PEG 3350, 0.1 M MOPS pH 7.5, 0.2 M Magnesium Acetate, 0.025 M Magnesium Chloride, 0.006 M n-Nonyl-beta-D-maltopyranoside, and 5% glycerol. Mixed 1:1 with protein., VAPOR DIFFUSION, HANGING DROP, temperature 298K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: APS / Beamline: 24-ID-C / Wavelength: 0.9794 Å
DetectorType: ADSC QUANTUM 315 / Detector: CCD / Date: Feb 25, 2011
RadiationMonochromator: Si(111) / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.9794 Å / Relative weight: 1
ReflectionResolution: 3.95→30 Å / Num. all: 55058 / Num. obs: 53173 / % possible obs: 96.6 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 2.9 % / Rsym value: 0.161 / Net I/σ(I): 5
Reflection shellResolution: 3.95→4.09 Å / Redundancy: 2.9 % / Mean I/σ(I) obs: 2.3 / Num. unique all: 5306 / Rsym value: 0.457 / % possible all: 96.5

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Processing

Software
NameClassification
HKL-2000data collection
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling
CNSphasing
RefinementMethod to determine structure: FOURIER SYNTHESIS
Starting model: 3UUS

3uus


Resolution: 3.95→30 Å / σ(F): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.284 2513 -Selected the same set used in starting model plus another set chosen from the new reflections to give a total of 5% free reflections.
Rwork0.259 ---
all-55058 --
obs-52934 96.1 %-
Refinement stepCycle: LAST / Resolution: 3.95→30 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms34977 0 360 8 35345
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.02
X-RAY DIFFRACTIONc_angle_d0.74
X-RAY DIFFRACTIONc_mcbond_it2.372
X-RAY DIFFRACTIONc_mcangle_it3.677
LS refinement shellResolution: 3.95→4.09 Å
RfactorNum. reflection
Rfree0.329 246
Rwork0.333 -
obs-5156

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