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- PDB-4tx5: Crystal structure of Smac-DIABLO (in space group P65) -

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Basic information

Entry
Database: PDB / ID: 4tx5
TitleCrystal structure of Smac-DIABLO (in space group P65)
ComponentsDiablo homolog, mitochondrial
KeywordsAPOPTOSIS / Smac-DIABLO
Function / homology
Function and homology information


Release of apoptotic factors from the mitochondria / CD40 receptor complex / SMAC, XIAP-regulated apoptotic response / Regulation of the apoptosome activity / SMAC (DIABLO) binds to IAPs / SMAC(DIABLO)-mediated dissociation of IAP:caspase complexes / intrinsic apoptotic signaling pathway in response to oxidative stress / extrinsic apoptotic signaling pathway via death domain receptors / intrinsic apoptotic signaling pathway / mitochondrial intermembrane space ...Release of apoptotic factors from the mitochondria / CD40 receptor complex / SMAC, XIAP-regulated apoptotic response / Regulation of the apoptosome activity / SMAC (DIABLO) binds to IAPs / SMAC(DIABLO)-mediated dissociation of IAP:caspase complexes / intrinsic apoptotic signaling pathway in response to oxidative stress / extrinsic apoptotic signaling pathway via death domain receptors / intrinsic apoptotic signaling pathway / mitochondrial intermembrane space / cytoplasmic side of plasma membrane / neuron apoptotic process / positive regulation of apoptotic process / apoptotic process / mitochondrion / cytosol
Similarity search - Function
Methane Monooxygenase Hydroxylase; Chain G, domain 1 - #70 / Smac/DIABLO-like superfamily / Smac/DIABLO protein / Second Mitochondria-derived Activator of Caspases / Methane Monooxygenase Hydroxylase; Chain G, domain 1 / Up-down Bundle / Mainly Alpha
Similarity search - Domain/homology
ACETATE ION / Diablo IAP-binding mitochondrial protein
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.8 Å
AuthorsMilani, M. / Mastangelo, E. / Cossu, F.
CitationJournal: Biophys.J. / Year: 2015
Title: The activator of apoptosis Smac-DIABLO acts as a tetramer in solution.
Authors: Mastrangelo, E. / Vachette, P. / Cossu, F. / Malvezzi, F. / Bolognesi, M. / Milani, M.
History
DepositionJul 2, 2014Deposition site: RCSB / Processing site: PDBE
Revision 1.0Jul 15, 2015Provider: repository / Type: Initial release
Revision 1.1Dec 20, 2023Group: Data collection / Database references / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Diablo homolog, mitochondrial
B: Diablo homolog, mitochondrial
hetero molecules


Theoretical massNumber of molelcules
Total (without water)44,66212
Polymers43,7172
Non-polymers94510
Water4,071226
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area3980 Å2
ΔGint-73 kcal/mol
Surface area20840 Å2
MethodPISA
Unit cell
Length a, b, c (Å)90.999, 90.999, 113.802
Angle α, β, γ (deg.)90.00, 90.00, 120.00
Int Tables number170
Space group name H-MP65

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Components

#1: Protein Diablo homolog, mitochondrial / Direct IAP-binding protein with low pI / Second mitochondria-derived activator of caspase / Smac / Smac-DIABLO


Mass: 21858.252 Da / Num. of mol.: 2 / Fragment: UNP Residues 56-239
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: DIABLO, SMAC / Production host: Escherichia coli (E. coli) / References: UniProt: Q9NR28
#2: Chemical
ChemComp-MPD / (4S)-2-METHYL-2,4-PENTANEDIOL


Mass: 118.174 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: C6H14O2 / Comment: precipitant*YM
#3: Chemical
ChemComp-ACT / ACETATE ION


Mass: 59.044 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C2H3O2
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 226 / 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: 3.11 Å3/Da / Density % sol: 60.47 %
Crystal growTemperature: 293 K / Method: vapor diffusion, sitting drop / pH: 4.6
Details: 30% MPD, 0.1 M Sodium Acetate, 0.02 M Calcium Chloride.

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: ESRF / Beamline: ID14-4 / Wavelength: 0.979 Å
DetectorType: ADSC QUANTUM 315 / Detector: CCD / Date: Jul 19, 2009
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.979 Å / Relative weight: 1
ReflectionResolution: 1.8→45.5 Å / Num. obs: 49249 / % possible obs: 99.6 % / Redundancy: 7.5 % / Rmerge(I) obs: 0.056 / Net I/σ(I): 18.6
Reflection shellResolution: 1.8→1.9 Å / Redundancy: 7.6 % / Rmerge(I) obs: 0.57 / Mean I/σ(I) obs: 3.2 / Num. unique all: 7211 / % possible all: 100

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Processing

Software
NameVersionClassification
REFMAC5.8.0069refinement
iMOSFLMdata reduction
SCALAdata scaling
MOLREPphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 1FEW

1few


Resolution: 1.8→45.5 Å / Cor.coef. Fo:Fc: 0.968 / Cor.coef. Fo:Fc free: 0.956 / SU B: 2.193 / SU ML: 0.067 / Cross valid method: THROUGHOUT / ESU R: 0.094 / ESU R Free: 0.096 / Stereochemistry target values: MAXIMUM LIKELIHOOD / Details: HYDROGENS HAVE BEEN USED IF PRESENT IN THE INPUT
RfactorNum. reflection% reflectionSelection details
Rfree0.20217 2491 5.1 %RANDOM
Rwork0.16941 ---
obs0.17109 46705 99.55 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK
Displacement parametersBiso mean: 41.197 Å2
Baniso -1Baniso -2Baniso -3
1-0.72 Å20.36 Å20 Å2
2--0.72 Å20 Å2
3----2.33 Å2
Refinement stepCycle: 1 / Resolution: 1.8→45.5 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms2701 0 64 225 2990
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0120.0192946
X-RAY DIFFRACTIONr_bond_other_d
X-RAY DIFFRACTIONr_angle_refined_deg1.3431.9824022
X-RAY DIFFRACTIONr_angle_other_deg
X-RAY DIFFRACTIONr_dihedral_angle_1_deg
X-RAY DIFFRACTIONr_dihedral_angle_2_deg
X-RAY DIFFRACTIONr_dihedral_angle_3_deg
X-RAY DIFFRACTIONr_dihedral_angle_4_deg
X-RAY DIFFRACTIONr_chiral_restr0.0880.2481
X-RAY DIFFRACTIONr_gen_planes_refined0.0050.022168
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_it4.123.3931414
X-RAY DIFFRACTIONr_mcbond_other
X-RAY DIFFRACTIONr_mcangle_it4.5565.0131772
X-RAY DIFFRACTIONr_mcangle_other
X-RAY DIFFRACTIONr_scbond_it8.364.3551532
X-RAY DIFFRACTIONr_scbond_other
X-RAY DIFFRACTIONr_scangle_it
X-RAY DIFFRACTIONr_scangle_other
X-RAY DIFFRACTIONr_long_range_B_refined10.70536.423870
X-RAY DIFFRACTIONr_long_range_B_other
X-RAY DIFFRACTIONr_rigid_bond_restr
X-RAY DIFFRACTIONr_sphericity_free
X-RAY DIFFRACTIONr_sphericity_bonded
LS refinement shellResolution: 1.8→1.847 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.306 169 -
Rwork0.281 3459 -
obs--100 %

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