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- PDB-3ibf: Crystal structure of unliganded caspase-7 -

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Basic information

Entry
Database: PDB / ID: 3ibf
TitleCrystal structure of unliganded caspase-7
Components(Caspase-7) x 2
KeywordsHYDROLASE / protein structure / Alternative splicing / Apoptosis / Cytoplasm / Polymorphism / Protease / Thiol protease / Zymogen
Function / homology
Function and homology information


caspase-7 / lymphocyte apoptotic process / positive regulation of plasma membrane repair / cellular response to staurosporine / SMAC, XIAP-regulated apoptotic response / Activation of caspases through apoptosome-mediated cleavage / SMAC (DIABLO) binds to IAPs / SMAC(DIABLO)-mediated dissociation of IAP:caspase complexes / fibroblast apoptotic process / execution phase of apoptosis ...caspase-7 / lymphocyte apoptotic process / positive regulation of plasma membrane repair / cellular response to staurosporine / SMAC, XIAP-regulated apoptotic response / Activation of caspases through apoptosome-mediated cleavage / SMAC (DIABLO) binds to IAPs / SMAC(DIABLO)-mediated dissociation of IAP:caspase complexes / fibroblast apoptotic process / execution phase of apoptosis / Apoptotic cleavage of cellular proteins / Caspase-mediated cleavage of cytoskeletal proteins / response to UV / striated muscle cell differentiation / cysteine-type peptidase activity / protein maturation / protein catabolic process / protein processing / fibrillar center / peptidase activity / positive regulation of neuron apoptotic process / heart development / cellular response to lipopolysaccharide / neuron apoptotic process / aspartic-type endopeptidase activity / defense response to bacterium / cysteine-type endopeptidase activity / apoptotic process / proteolysis / extracellular space / RNA binding / nucleoplasm / nucleus / plasma membrane / cytoplasm / cytosol
Similarity search - Function
Caspase-like / Rossmann fold - #1460 / Peptidase C14 family / Peptidase family C14A, His active site / Caspase family histidine active site. / Peptidase C14, caspase non-catalytic subunit p10 / Peptidase family C14A, cysteine active site / Caspase family cysteine active site. / Caspase family p10 domain profile. / Peptidase C14A, caspase catalytic domain ...Caspase-like / Rossmann fold - #1460 / Peptidase C14 family / Peptidase family C14A, His active site / Caspase family histidine active site. / Peptidase C14, caspase non-catalytic subunit p10 / Peptidase family C14A, cysteine active site / Caspase family cysteine active site. / Caspase family p10 domain profile. / Peptidase C14A, caspase catalytic domain / Caspase, interleukin-1 beta converting enzyme (ICE) homologues / Peptidase C14, p20 domain / Caspase family p20 domain profile. / : / Caspase domain / Caspase-like domain superfamily / Alpha-Beta Plaits / Rossmann fold / 2-Layer Sandwich / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.5 Å
AuthorsAgniswamy, J.
CitationJournal: Apoptosis / Year: 2009
Title: Conformational similarity in the activation of caspase-3 and -7 revealed by the unliganded and inhibited structures of caspase-7.
Authors: Agniswamy, J. / Fang, B. / Weber, I.T.
History
DepositionJul 15, 2009Deposition site: RCSB / Processing site: RCSB
Revision 1.0Sep 1, 2009Provider: repository / Type: Initial release
Revision 1.1Jul 13, 2011Group: Version format compliance
Revision 1.2Sep 6, 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: Caspase-7
B: Caspase-7
C: Caspase-7
D: Caspase-7


Theoretical massNumber of molelcules
Total (without water)61,8354
Polymers61,8354
Non-polymers00
Water79344
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area13690 Å2
ΔGint-75 kcal/mol
Surface area18320 Å2
MethodPISA
Unit cell
Length a, b, c (Å)89.197, 89.197, 185.365
Angle α, β, γ (deg.)90.00, 90.00, 120.00
Int Tables number154
Space group name H-MP3221

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Components

#1: Protein Caspase-7 / CASP-7 / ICE-like apoptotic protease 3 / ICE-LAP3 / Apoptotic protease Mch-3 / CMH-1 / Caspase-7 ...CASP-7 / ICE-like apoptotic protease 3 / ICE-LAP3 / Apoptotic protease Mch-3 / CMH-1 / Caspase-7 subunit p20 / Caspase-7 subunit p11


Mass: 19564.598 Da / Num. of mol.: 2 / Fragment: P20 subunit
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CASP7, MCH3 / Production host: Escherichia coli (E. coli) / References: UniProt: P55210, caspase-7
#2: Protein Caspase-7 / CASP-7 / ICE-like apoptotic protease 3 / ICE-LAP3 / Apoptotic protease Mch-3 / CMH-1 / Caspase-7 ...CASP-7 / ICE-like apoptotic protease 3 / ICE-LAP3 / Apoptotic protease Mch-3 / CMH-1 / Caspase-7 subunit p20 / Caspase-7 subunit p11


Mass: 11352.862 Da / Num. of mol.: 2 / Fragment: P10 subunit
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CASP7, MCH3 / Production host: Escherichia coli (E. coli) / References: UniProt: P55210, caspase-7
#3: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 44 / 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: 3.44 Å3/Da / Density % sol: 64.27 %
Crystal growTemperature: 298 K / Method: vapor diffusion, hanging drop / pH: 5.5
Details: 2.1M Sodium formate, 0.1M Sodium citrate pH 5.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: APS / Beamline: 22-ID / Wavelength: 1 Å
DetectorType: MARMOSAIC 300 mm CCD / Detector: CCD / Date: Jul 25, 2007
RadiationMonochromator: Si 220 / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 2.5→50 Å / Num. all: 27744 / Num. obs: 25693 / % possible obs: 92.6 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 2 / Redundancy: 3.5 % / Rmerge(I) obs: 0.07
Reflection shellResolution: 2.5→2.59 Å / Redundancy: 2.3 % / Rmerge(I) obs: 0.375 / Mean I/σ(I) obs: 17.3 / Num. unique all: 1659 / % possible all: 55.7

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Processing

Software
NameVersionClassification
HKL-2000data collection
PHASERphasing
CNS1refinement
HKL-2000data reduction
HKL-2000data scaling
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 1F1J

1f1j


Resolution: 2.5→50 Å / Cross valid method: THROUGHOUT / σ(F): 0 / σ(I): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.235 2559 -Random
Rwork0.204 ---
all0.218 27744 --
obs0.219 25693 92.6 %-
Refinement stepCycle: LAST / Resolution: 2.5→50 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3760 0 0 44 3804

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