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- PDB-2kq3: Solution structure of SNase140 -

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Basic information

Entry
Database: PDB / ID: 2kq3
TitleSolution structure of SNase140
ComponentsThermonucleaseMicrococcal nuclease
KeywordsHYDROLASE / Nuclease
Function / homology
Function and homology information


endonuclease activity, active with either ribo- or deoxyribonucleic acids and producing 3'-phosphomonoesters / micrococcal nuclease / nucleic acid binding
Similarity search - Function
Thermonuclease family signature 1. / OB fold (Dihydrolipoamide Acetyltransferase, E2P) - #90 / Thermonuclease active site / Thermonuclease family signature 2. / Staphylococcal nuclease (SNase-like), OB-fold / Staphylococcal nuclease homologue / Thermonuclease domain profile. / Staphylococcal nuclease homologues / SNase-like, OB-fold superfamily / OB fold (Dihydrolipoamide Acetyltransferase, E2P) ...Thermonuclease family signature 1. / OB fold (Dihydrolipoamide Acetyltransferase, E2P) - #90 / Thermonuclease active site / Thermonuclease family signature 2. / Staphylococcal nuclease (SNase-like), OB-fold / Staphylococcal nuclease homologue / Thermonuclease domain profile. / Staphylococcal nuclease homologues / SNase-like, OB-fold superfamily / OB fold (Dihydrolipoamide Acetyltransferase, E2P) / Beta Barrel / Mainly Beta
Similarity search - Domain/homology
Biological speciesStaphylococcus aureus (bacteria)
MethodSOLUTION NMR / molecular dynamics, simulated annealing
Model detailslowest energy, model 1
AuthorsWang, M. / Feng, Y. / Yao, H. / Wang, J.
CitationJournal: Biochemistry / Year: 2010
Title: Importance of the C-Terminal Loop L137-S141 for the Folding and Folding Stability of Staphylococcal Nuclease
Authors: Wang, M. / Feng, Y. / Yao, H. / Wang, J.
History
DepositionOct 26, 2009Deposition site: BMRB / Processing site: PDBJ
Revision 1.0May 26, 2010Provider: repository / Type: Initial release
Revision 1.1Jul 13, 2011Group: Version format compliance
Revision 1.2Feb 26, 2020Group: Data collection / Derived calculations / Other
Category: pdbx_database_status / pdbx_nmr_software ...pdbx_database_status / pdbx_nmr_software / pdbx_struct_assembly / pdbx_struct_oper_list
Item: _pdbx_database_status.status_code_cs / _pdbx_nmr_software.name
Revision 1.3Jun 14, 2023Group: Database references / Other / Category: database_2 / pdbx_database_status
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_database_status.status_code_nmr_data

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Thermonuclease


Theoretical massNumber of molelcules
Total (without water)15,9151
Polymers15,9151
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_5551
NMR ensembles
DataCriteria
Number of conformers (submitted / calculated)20 / 100structures with the lowest energy
RepresentativeModel #1lowest energy

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Components

#1: Protein Thermonuclease / Micrococcal nuclease


Mass: 15914.532 Da / Num. of mol.: 1 / Fragment: residues in UNP 69-208
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Staphylococcus aureus (bacteria) / Production host: Escherichia coli (E. coli) / References: UniProt: A5A523, micrococcal nuclease

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Experimental details

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Experiment

ExperimentMethod: SOLUTION NMR
NMR experiment
Conditions-IDExperiment-IDSolution-IDType
1112D 1H-15N HSQC
1213D HNCA
1313D HN(CA)CB
1413D HNCO
1513D CBCA(CO)NH
1613D C(CO)NH
1713D HBHA(CO)NH
1813D (H)CCH-TOCSY
1913D (H)CCH-COSY
11013D 1H-15N TOCSY
11113D 1H-15N NOESY
11213D 1H-13C NOESY

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Sample preparation

DetailsContents: 50mM [U-2H] sodium acetate-1, 250mM potassium chloride-2, 1mM EDTA-3, 0.02% sodium azide-4, 0.2mM DSS-5, 90% H2O/10% D2O
Solvent system: 90% H2O/10% D2O
Sample
Conc. (mg/ml)ComponentIsotopic labelingSolution-ID
50 mMsodium acetate-1[U-2H]1
250 mMpotassium chloride-21
1 mMEDTA-31
0.02 %sodium azide-41
0.2 mMDSS-51
Sample conditionsIonic strength: 250 / pH: 5.0 / Pressure: ambient / Temperature: 300 K

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NMR measurement

NMR spectrometerType: Bruker DMX / Manufacturer: Bruker / Model: DMX / Field strength: 600 MHz

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Processing

NMR software
NameDeveloperClassification
XwinNMRBruker Biospincollection
FelixAccelrys Software Inc.processing
FelixAccelrys Software Inc.peak picking
FelixAccelrys Software Inc.chemical shift assignment
FelixAccelrys Software Inc.data analysis
CNSBrunger, Adams, Clore, Gros, Nilges and Readstructure solution
CNSBrunger, Adams, Clore, Gros, Nilges and Readrefinement
RefinementMethod: molecular dynamics, simulated annealing / Software ordinal: 1
NMR representativeSelection criteria: lowest energy
NMR ensembleConformer selection criteria: structures with the lowest energy
Conformers calculated total number: 100 / Conformers submitted total number: 20 / Representative conformer: 1

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