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- PDB-1k88: Crystal structure of procaspase-7 -

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Basic information

Entry
Database: PDB / ID: 1k88
TitleCrystal structure of procaspase-7
Componentsprocaspase-7
KeywordsAPOPTOSIS / procaspase activation / protease / substrate binding
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 / : ...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 / protein maturation / Caspase-mediated cleavage of cytoskeletal proteins / response to UV / cysteine-type peptidase activity / striated muscle cell differentiation / protein catabolic process / protein processing / positive regulation of neuron apoptotic process / peptidase activity / heart development / cellular response to lipopolysaccharide / neuron apoptotic process / aspartic-type endopeptidase activity / defense response to bacterium / cysteine-type endopeptidase activity / apoptotic process / proteolysis / RNA binding / extracellular space / nucleoplasm / nucleus / cytosol / cytoplasm
Similarity search - Function
Rossmann fold - #1460 / 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 ...Rossmann fold - #1460 / 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 / Rossmann fold / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.7 Å
AuthorsChai, J. / Wu, Q. / Shiozaki, E. / Srinivasa, S.M. / Alnemri, E.S. / Shi, Y.
CitationJournal: Cell(Cambridge,Mass.) / Year: 2001
Title: Crystal structure of a procaspase-7 zymogen: mechanisms of activation and substrate binding
Authors: Chai, J. / Wu, Q. / Shiozaki, E. / Srinivasula, S.M. / Alnemri, E.S. / Shi, Y.
History
DepositionOct 23, 2001Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 21, 2001Provider: repository / Type: Initial release
Revision 1.1Apr 27, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Oct 27, 2021Group: Database references / Category: database_2 / struct_ref_seq_dif
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_ref_seq_dif.details
Revision 1.4Feb 7, 2024Group: Data collection / Category: chem_comp_atom / chem_comp_bond

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: procaspase-7
B: procaspase-7


Theoretical massNumber of molelcules
Total (without water)57,4752
Polymers57,4752
Non-polymers00
Water1,33374
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area2880 Å2
ΔGint-12 kcal/mol
Surface area20230 Å2
MethodPISA
Unit cell
Length a, b, c (Å)91.2, 91.2, 185.2
Angle α, β, γ (deg.)90, 90, 120
Int Tables number154
Space group name H-MP3221

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Components

#1: Protein procaspase-7


Mass: 28737.670 Da / Num. of mol.: 2 / Fragment: procaspase-7 / Mutation: C186A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli)
References: UniProt: P55210, Hydrolases; Acting on peptide bonds (peptidases); Cysteine endopeptidases
#2: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 74 / 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: 3.87 Å3/Da / Density % sol: 68.19 %
Crystal growTemperature: 296 K / Method: vapor diffusion, hanging drop / pH: 5.8
Details: lithium sulfate, sodium chloride, pH 5.8, VAPOR DIFFUSION, HANGING DROP, temperature 296K
Crystal grow
*PLUS
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDChemical formula
1100 mMcitrate1reservoir
21.0 Mlithium sulfate1reservoir
31.0 M1reservoirNaCl

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: NSLS / Beamline: X25 / Wavelength: 1.1 Å
DetectorType: FUJI / Detector: IMAGE PLATE / Date: Jul 26, 2001
RadiationMonochromator: GRAPHITE / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.1 Å / Relative weight: 1
ReflectionResolution: 2.7→99 Å / Num. all: 23464 / Num. obs: 21329 / % possible obs: 90.9 % / Observed criterion σ(F): 2 / Observed criterion σ(I): 2
Reflection shellResolution: 2.7→2.8 Å / % possible all: 47
Reflection
*PLUS
Highest resolution: 2.7 Å / Num. measured all: 97318 / Rmerge(I) obs: 0.048
Reflection shell
*PLUS
Rmerge(I) obs: 0.27

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Processing

Software
NameClassification
AMoREphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
RefinementMethod to determine structure: MOLECULAR REPLACEMENT / Resolution: 2.7→20 Å / σ(F): 0.5 / Stereochemistry target values: Engh & Huber
RfactorNum. reflectionSelection details
Rfree0.253 1008 random
Rwork0.227 --
all0.234 24772 -
obs0.231 21329 -
Refinement stepCycle: LAST / Resolution: 2.7→20 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3692 0 0 74 3766
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.008
X-RAY DIFFRACTIONc_angle_deg1.62
LS refinement shellResolution: 2.7→2.75 Å / Rfactor Rfree error: 0.012
RfactorNum. reflection% reflection
Rfree0.48 5 -
Rwork0.35 --
obs-149 50 %
Software
*PLUS
Name: CNS / Classification: refinement
Refinement
*PLUS
Highest resolution: 2.7 Å / Lowest resolution: 20 Å / σ(F): 0.5 / Rfactor obs: 0.227
Solvent computation
*PLUS
Displacement parameters
*PLUS
LS refinement shell
*PLUS
Highest resolution: 2.7 Å / Rfactor Rfree: 0.48 / Rfactor Rwork: 0.35

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