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- PDB-1kjx: IMP Complex of E. Coli Adenylosuccinate Synthetase -

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Basic information

Entry
Database: PDB / ID: 1kjx
TitleIMP Complex of E. Coli Adenylosuccinate Synthetase
ComponentsAdenylosuccinate SynthetaseAdenylosuccinate synthase
KeywordsLIGASE / GTP-HYDROLYSING ENZYMES / PURINE NUCLEOTIDE BIOSYNTHESIS / INDUCED FIT / IMP
Function / homology
Function and homology information


adenylosuccinate synthase / adenylosuccinate synthase activity / adenosine biosynthetic process / IMP metabolic process / 'de novo' AMP biosynthetic process / nucleobase-containing small molecule interconversion / purine nucleotide biosynthetic process / guanosine tetraphosphate binding / cellular response to DNA damage stimulus / GTP binding ...adenylosuccinate synthase / adenylosuccinate synthase activity / adenosine biosynthetic process / IMP metabolic process / 'de novo' AMP biosynthetic process / nucleobase-containing small molecule interconversion / purine nucleotide biosynthetic process / guanosine tetraphosphate binding / cellular response to DNA damage stimulus / GTP binding / magnesium ion binding / membrane / cytosol / cytoplasm
Similarity search - Function
Adenylosuccinate Synthetase, subunit A, domain 3 / Adenylosuccinate Synthetase; Chain A, domain 3 / Adenylosuccinate Synthetase, subunit A; domain 2 / Adenylosuccinate Synthetase, subunit A, domain 2 / Adenylosuccinate Synthetase; Chain A, domain 1 / Adenylosuccinate Synthetase, subunit A, domain 1 / Adenylosuccinate synthetase active site. / Adenylosuccinate synthase, active site / Adenylosuccinate synthase, GTP-binding site / Adenylosuccinate synthetase GTP-binding site. ...Adenylosuccinate Synthetase, subunit A, domain 3 / Adenylosuccinate Synthetase; Chain A, domain 3 / Adenylosuccinate Synthetase, subunit A; domain 2 / Adenylosuccinate Synthetase, subunit A, domain 2 / Adenylosuccinate Synthetase; Chain A, domain 1 / Adenylosuccinate Synthetase, subunit A, domain 1 / Adenylosuccinate synthetase active site. / Adenylosuccinate synthase, active site / Adenylosuccinate synthase, GTP-binding site / Adenylosuccinate synthetase GTP-binding site. / Adenylosuccinate synthetase, domain 2 / Adenylosuccinate synthetase, domain 3 / Adenylosuccinate synthetase, domain 1 / Adenylosuccinate synthetase / Adenylosuccinate synthetase / Adenylosuccinate synthetase / Alpha-Beta Complex / P-loop containing nucleoside triphosphate hydrolase / Orthogonal Bundle / 3-Layer(aba) Sandwich / Mainly Alpha / Alpha Beta
Similarity search - Domain/homology
INOSINIC ACID / Adenylosuccinate synthetase
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 2.6 Å
AuthorsHou, Z. / Wang, W. / Fromm, H.J. / Honzatko, R.B.
CitationJournal: J.Biol.Chem. / Year: 2002
Title: IMP Alone Organizes the Active Site of Adenylosuccinate Synthetase from Escherichia coli.
Authors: Hou, Z. / Wang, W. / Fromm, H.J. / Honzatko, R.B.
History
DepositionDec 5, 2001Deposition site: RCSB / Processing site: RCSB
Revision 1.0Mar 20, 2002Provider: repository / Type: Initial release
Revision 1.1Apr 27, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Derived calculations / Version format compliance
Revision 1.3Jun 1, 2016Group: Source and taxonomy
Revision 1.4Oct 11, 2017Group: Refinement description / Category: software / Item: _software.name

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Adenylosuccinate Synthetase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)47,7492
Polymers47,4011
Non-polymers3481
Water5,621312
1
A: Adenylosuccinate Synthetase
hetero molecules

A: Adenylosuccinate Synthetase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)95,4984
Polymers94,8022
Non-polymers6962
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation6_555-x,-x+y,-z+2/31
Buried area6990 Å2
ΔGint-14 kcal/mol
Surface area29330 Å2
MethodPISA, PQS
Unit cell
Length a, b, c (Å)80.6, 80.6, 158.65
Angle α, β, γ (deg.)90., 90., 120.
Int Tables number154
Space group name H-MP3221

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Components

#1: Protein Adenylosuccinate Synthetase / Adenylosuccinate synthase


Mass: 47400.793 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli) / Strain: K-12 / Production host: Escherichia coli (E. coli) / Strain (production host): PUR A H1238 / References: UniProt: P0A7D4, adenylosuccinate synthase
#2: Chemical ChemComp-IMP / INOSINIC ACID / Inosinic acid


Mass: 348.206 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C10H13N4O8P
#3: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 312 / 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: 3.14 Å3/Da / Density % sol: 60.79 %
Crystal growTemperature: 293 K / Method: vapor diffusion, hanging drop / pH: 6.8
Details: PEG 8000, HEPES, magnesium acetate, IMP, pH 6.8, VAPOR DIFFUSION, HANGING DROP, temperature 293K

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Data collection

DiffractionMean temperature: 120 K
Diffraction sourceSource: ROTATING ANODE / Type: SIEMENS / Wavelength: 1.54178 Å
DetectorType: SIEMENS / Detector: AREA DETECTOR / Date: Jan 1, 1998 / Details: Graphite monochromator
RadiationMonochromator: Graphite / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.54178 Å / Relative weight: 1
ReflectionResolution: 2.6→25 Å / Num. all: 20293 / Num. obs: 20293 / % possible obs: 98 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 5 % / Rsym value: 0.11
Reflection shellResolution: 2.6→2.8 Å / % possible all: 96

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Processing

Software
NameVersionClassification
X-PLORmodel building
X-PLOR3.1refinement
X-GENdata reduction
X-GENdata scaling
X-PLORphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT / Resolution: 2.6→8 Å / Cross valid method: THROUGHOUT / σ(F): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.283 1349 10 %Random
Rwork0.196 ---
all-13495 --
obs-13495 --
Refinement stepCycle: LAST / Resolution: 2.6→8 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3321 0 23 312 3656
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONbond lengths0.01
X-RAY DIFFRACTIONbond angles1.71
X-RAY DIFFRACTIONdihedral angles24.6
X-RAY DIFFRACTIONimproper angles1.53

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