2p2c

Inhibition of caspase-2 by a designed ankyrin repeat protein (DARPin)

Method: X-RAY DIFFRACTION D_max: 161.7 Å Quality: GOOD

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1. Protein Identity and Related Structures Protein Identity & Related Structures

Caspase-2

OrganismNot specified

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Protein heterocomplex Heteromer Protein × 6 PDB declaration: hexameric（6） Consistent with protein copy count	Chain A； UniProt 167–333 Chain B； UniProt 348–452 Chain C； UniProt 167–333 Chain D； UniProt 348–452	Fragment：Residues 167-333 Fragment：Residues 348-452	Caspase-2 × 2	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 7.2；293 K；17% PEG 5000-MME, 0.1 M Tris-HOAc, 0.1 M KSCN, 30% ethylene glycol, pH 7.2, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 3.24 Å R-free 0.305
2	Protein heterocomplex Heteromer Protein × 6 PDB declaration: hexameric（6） Consistent with protein copy count	Chain E； UniProt 167–333 Chain F； UniProt 348–452 Chain G； UniProt 167–333 Chain H； UniProt 348–452	Fragment：Residues 167-333 Fragment：Residues 348-452	Caspase-2 × 2	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 7.2；293 K；17% PEG 5000-MME, 0.1 M Tris-HOAc, 0.1 M KSCN, 30% ethylene glycol, pH 7.2, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 3.24 Å R-free 0.305
3	Protein heterocomplex Heteromer Protein × 6 PDB declaration: hexameric（6） Consistent with protein copy count	Chain I； UniProt 167–333 Chain J； UniProt 348–452 Chain K； UniProt 167–333 Chain L； UniProt 348–452	Fragment：Residues 167-333 Fragment：Residues 348-452	Caspase-2 × 2	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 7.2；293 K；17% PEG 5000-MME, 0.1 M Tris-HOAc, 0.1 M KSCN, 30% ethylene glycol, pH 7.2, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 3.24 Å R-free 0.305

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB	Difference from Current Entry 2P2C	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1PYO Crystal Structure of Human Caspase-2 in Complex with Acetyl-Leu-Asp-Glu-Ser-Asp-cho Deposited 2003-07-09	Different construct Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain A 167–333（167 aa） Fragment：subunit p18, sequence database residues 151-316 Chain B 348–452（105 aa） Fragment：subunit p12, sequence database residues 331-435 Chain C 167–333（167 aa） Fragment：subunit p18, sequence database residues 151-316 Chain D 348–452（105 aa） Fragment：subunit p12, sequence database residues 331-435	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；277 K；PEG 6000, MOPS, DTT, SUCROSE, pH 7.0, VAPOR DIFFUSION, SITTING DROP, temperature 277K	Resolution 1.65 Å R-free 0.213
3R5J Crystal structure of active caspase-2 bound with Ac-ADVAD-CHO Deposited 2011-03-18	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 175–333（159 aa） Chain B 349–452（104 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；0.1M HEPES, 15% PEG 3350, 3mM DTT, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 1.77 Å R-free 0.218
3R5J Crystal structure of active caspase-2 bound with Ac-ADVAD-CHO Deposited 2011-03-18	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain C 175–333（159 aa） Chain D 349–452（104 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；0.1M HEPES, 15% PEG 3350, 3mM DTT, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 1.77 Å R-free 0.218
3R5J Crystal structure of active caspase-2 bound with Ac-ADVAD-CHO Deposited 2011-03-18	Different construct Different experimental conditions Different structure-quality metrics	Assembly 3 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain A 175–333（159 aa） Chain B 349–452（104 aa） Chain C 175–333（159 aa） Chain D 349–452（104 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；0.1M HEPES, 15% PEG 3350, 3mM DTT, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 1.77 Å R-free 0.218
3R6G Crystal structure of active caspase-2 bound with Ac-VDVAD-CHO Deposited 2011-03-21	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 175–333（159 aa） Chain B 349–452（104 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；0.1M HEPES, 15% PEG 3350, 3mM DTT, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.07 Å R-free 0.210
3R6G Crystal structure of active caspase-2 bound with Ac-VDVAD-CHO Deposited 2011-03-21	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain C 175–333（159 aa） Chain D 349–452（104 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；0.1M HEPES, 15% PEG 3350, 3mM DTT, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.07 Å R-free 0.210
3R6G Crystal structure of active caspase-2 bound with Ac-VDVAD-CHO Deposited 2011-03-21	Different construct Different experimental conditions Different structure-quality metrics	Assembly 3 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain A 175–333（159 aa） Chain B 349–452（104 aa） Chain C 175–333（159 aa） Chain D 349–452（104 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；0.1M HEPES, 15% PEG 3350, 3mM DTT, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.07 Å R-free 0.210
3R6L Caspase-2 T380A bound with Ac-VDVAD-CHO Deposited 2011-03-21	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 175–333（159 aa） Chain B 349–452（104 aa）	Mutation：T380A	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；0.1M HEPES, 15% PEG 3350, 3mM DTT, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 1.90 Å R-free 0.194
3R6L Caspase-2 T380A bound with Ac-VDVAD-CHO Deposited 2011-03-21	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain C 175–333（159 aa） Chain D 349–452（104 aa）	Mutation：T380A	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；0.1M HEPES, 15% PEG 3350, 3mM DTT, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 1.90 Å R-free 0.194
3R6L Caspase-2 T380A bound with Ac-VDVAD-CHO Deposited 2011-03-21	Different construct Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 3 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain A 175–333（159 aa） Chain B 349–452（104 aa） Chain C 175–333（159 aa） Chain D 349–452（104 aa）	Mutation：T380A Mutation：T380A	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；0.1M HEPES, 15% PEG 3350, 3mM DTT, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 1.90 Å R-free 0.194
3R7B Caspase-2 bound to one copy of Ac-DVAD-CHO Deposited 2011-03-22	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric	Chain A 175–333（159 aa） Chain B 349–452（104 aa） Chain C 175–333（159 aa） Chain D 349–452（104 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；0.1M HEPES (pH 7.0), 15% PEG 3350, 3mM DTT, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 1.80 Å R-free 0.217
3R7N Caspase-2 bound with two copies of Ac-DVAD-CHO Deposited 2011-03-22	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 175–333（159 aa） Chain B 349–452（104 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；0.1M HEPES, 15% PEG 3350, 3mM DTT, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.33 Å R-free 0.227
3R7N Caspase-2 bound with two copies of Ac-DVAD-CHO Deposited 2011-03-22	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain C 175–333（159 aa） Chain D 349–452（104 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；0.1M HEPES, 15% PEG 3350, 3mM DTT, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.33 Å R-free 0.227
3R7N Caspase-2 bound with two copies of Ac-DVAD-CHO Deposited 2011-03-22	Different construct Different experimental conditions Different structure-quality metrics	Assembly 3 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain A 175–333（159 aa） Chain B 349–452（104 aa） Chain C 175–333（159 aa） Chain D 349–452（104 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；0.1M HEPES, 15% PEG 3350, 3mM DTT, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.33 Å R-free 0.227
3R7S Crystal Structure of Apo Caspase2 Deposited 2011-03-22	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 175–333（159 aa） Fragment：UNP residues 175-333 Chain B 349–452（104 aa） Fragment：UNP residues 349-452	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；0.1M HEPES, 15% PEG 3350, 3mM DTT, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.25 Å R-free 0.226
3R7S Crystal Structure of Apo Caspase2 Deposited 2011-03-22	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain C 175–333（159 aa） Fragment：UNP residues 175-333 Chain D 349–452（104 aa） Fragment：UNP residues 349-452	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；0.1M HEPES, 15% PEG 3350, 3mM DTT, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.25 Å R-free 0.226
3R7S Crystal Structure of Apo Caspase2 Deposited 2011-03-22	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 3 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 175–333（159 aa） Fragment：UNP residues 175-333 Chain B 349–452（104 aa） Fragment：UNP residues 349-452 Chain C 175–333（159 aa） Fragment：UNP residues 175-333 Chain D 349–452（104 aa） Fragment：UNP residues 349-452	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；0.1M HEPES, 15% PEG 3350, 3mM DTT, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.25 Å R-free 0.226
3RJM CASPASE2 IN COMPLEX WITH CHDI LIGAND 33c Deposited 2011-04-15	Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain A 167–333（167 aa） Fragment：Residues 167-333 Chain B 348–452（105 aa） Fragment：Residues 348-452 Chain C 167–333（167 aa） Fragment：Residues 167-333 Chain D 348–452（105 aa） Fragment：Residues 348-452	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；290 K；26% PEG 3500, 100MM MES PH 6.5 - PH 7.0, SITTING DROP, VAPOR DIFFUSION, TEMPERATURE 290K, VAPOR DIFFUSION, SITTING DROP	Resolution 2.55 Å R-free 0.249
6S9K Structure of 14-3-3 gamma in complex with caspase-2 peptide containing 14-3-3 binding motif Ser139 and NLS Deposited 2019-07-15	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain B 135–168（34 aa）	Non-standard monomer：Yes (specific site not provided by mmCIF)	CFH 1,1,1,3,3,3-hexafluoropropan-2-ol × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；293.15 K；PEG 400, calcium chloride, HEPES, 1,1,1,3,3,3-hexafluoropropan-2-ol	Resolution 1.60 Å R-free 0.221
6SAD Structure of 14-3-3 gamma in complex with double phosphorylated caspase-2 peptide on Ser139 and Ser164 Deposited 2019-07-16	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain C 135–168（34 aa）	Non-standard monomer：Yes (specific site not provided by mmCIF)	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；293.15 K；PEG 400, magnesium chloride, HEPES, 1,1,1,3,3,3-hexafluoropropan-2-ol	Resolution 2.75 Å R-free 0.271
8VP4 Crystal Structure of JF1cpCasp2 with Peptide Inhibitor AcVDVAD-CHO Deposited 2024-01-16	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain A 334–448（115 aa） Chain A 176–333（158 aa） Chain B 334–448（115 aa） Chain B 176–333（158 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 8；293 K；0.1 M Tris, pH 8.0, 0.2 M Sodium chloride, 20% w/v PEG 6000	Resolution 1.51 Å R-free 0.214
9C2Y Crystal Structure of JF1cpCasp2 in complex with MUR-65 Deposited 2024-05-31	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain A 334–448（115 aa） Chain A 177–333（157 aa） Chain B 334–448（115 aa） Chain B 177–333（157 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；298 K；0.1 M Tris, pH 8.0, 0.2 M Sodium chloride, 20% w/v PEG 6000	Resolution 1.96 Å R-free 0.248
9C2Y Crystal Structure of JF1cpCasp2 in complex with MUR-65 Deposited 2024-05-31	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain C 334–448（115 aa） Chain C 177–333（157 aa） Chain D 334–448（115 aa） Chain D 177–333（157 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；298 K；0.1 M Tris, pH 8.0, 0.2 M Sodium chloride, 20% w/v PEG 6000	Resolution 1.96 Å R-free 0.248

12 other PDB entries and 23 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	CASP2_HUMAN
Isoform	—
PDB entities	1, 2
Chains and sequence ranges	Author chain A； PDBConstruct 3–169； UniProt 167–333 Author chain C； PDBConstruct 3–169； UniProt 167–333 Author chain E； PDBConstruct 3–169； UniProt 167–333 Author chain G； PDBConstruct 3–169； UniProt 167–333 Author chain I； PDBConstruct 3–169； UniProt 167–333 Author chain K； PDBConstruct 3–169； UniProt 167–333 Author chain B； PDBConstruct 2–106； UniProt 348–452 Author chain D； PDBConstruct 2–106； UniProt 348–452 Author chain F； PDBConstruct 2–106； UniProt 348–452 Author chain H； PDBConstruct 2–106； UniProt 348–452 Author chain J； PDBConstruct 2–106； UniProt 348–452 Author chain L； PDBConstruct 2–106； UniProt 348–452

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

Download Download SAXS (.dat) P(r) (.pr.out) CIF

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	2p2c
Deposition date deposition_date	2007-03-07
Structure title title	Inhibition of caspase-2 by a designed ankyrin repeat protein (DARPin)
Keywords keywords	;apoptosis, caspase, caspase-2, inhibition, protein design, protein libraries, designed ankyrin repeat proteins, ribosome display, HYDROLASE ;; HYDROLASE
Experimental Method method	X-RAY DIFFRACTION

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3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier	51.74 Å
Radius of gyration Rg (electron density) rg_electron	51.59 Å
Forward intensity I(0) i0	1107290000.00
Molecular weight molecular_weight	273930.0 kDa
Excluded volume excluded_volume	341010 Å³
Envelope volume envelope_volume	505130 Å³
Hydration-shell volume shell_volume	80140 Å³
Envelope diameter envelope_diameter	169.1 Å
Shell Rg shell_rg	57.28 Å
Envelope Rg envelope_rg	49.84 Å
Shape Rg shape_rg	51.62 Å
Total Rg total_rg	51.67 Å
Total atoms total_atoms	19256
Residues n_residues	2464
Spherical-harmonic order n_harmonics	20
q range q_range	— – 0.5000 Å⁻¹
Data points n_points	101
Shell type shell_type	directional
Solvent electron density solvent_density	0.3340 e/Å³
Shell contrast contrast_shell	0.0300 e/Å³
CRYSOL version crysol_version	4.1.3

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4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax	161.7 Å
Rg (real space) rg_real	51.63 Å
Rg uncertainty (real space) rg_real_error	1.39 Å
I(0) (real space) i0_real	1.1070e+09
I(0) uncertainty (real space) i0_real_error	2.1100e+07
Rg (reciprocal space) rg_reciprocal	51.82 Å
I(0) (reciprocal space) i0_reciprocal	1108000000.0000
Solution quality estimate total_estimate	0.8692
Solution quality rating solution_quality	GOOD a GOOD solution
P(r) peaks n_peaks	1
Primary peak position r_peak_primary	75.5 Å
Skewness Skewness skewness	0.108
Kurtosis Kurtosis kurtosis	-0.682
Angular range angular_range	— – 0.1500 Å⁻¹
Current regularization parameter α current_alpha	0.0000
Highest regularization parameter α highest_alpha	84950000.0000
Real-space data points n_real_points	31
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.949; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.998; Smooth: 0.449

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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (4)

Entity 1 Entity 1 polymer

Description description	Caspase-2
Molecular weight formula_weight	19006.6 kDa
EC 编号 ec_number	3.4.22.-
Source method src_method	nat
Copy count entity_count	6

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,C,E,G,I,K
Atom count atom_count	19285

MANKDGPLCLQVKPCTPEFYQTHFQLAYRLQSRPRGLALVLSNVHFTGEKELEFRSGGDVDHSTLVTLFKLLGYDVHVLCDQTAQEMQEKLQNFAQLPAHRVTDSCIVALLSHGVEGAIYGVDGKLLQLQEVFQLFDNANCPSLQNKPKMFFIQACRGDETDRGVDQQD

Entity 2 Entity 2 polymer

Description description	Caspase-2
Molecular weight formula_weight	12052.2 kDa
EC 编号 ec_number	3.4.22.-
Source method src_method	man
Copy count entity_count	6

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B,D,F,H,J,L

MAGKEKLPKMRLPTRSDMICGYACLKGTAAMRNTKRGSWYIEALAQVFSERACDMHVADMLVKVNALIKDREGYAPGTEFHRCKEMSEYCSTLCRHLYLFPGHPPT

来源 Source

来源生物 organism	Homo sapiens
通用名 common_name	human
NCBI Class编号 ncbi_taxonomy_id	9606

Entity 3 Entity 3 polymer

Description description	Caspase-2
Molecular weight formula_weight	18444.6 kDa
EC 编号 ec_number	3.4.22.-
Source method src_method	man
Copy count entity_count	6

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	P,Q,R,S,T,U

MRGSHHHHHHGSDLGKKLLEAARAGQDDEVRILMANGADVNATDWLGHTPLHLAAKTGHLEIVEVLLKYGADVNAWDNYGATPLHLAADNGHLEIVEVLLKHGADVNAKDYEGFTPLHLAAYDGHLEIVEVLLKYGADVNAQDKFGKTAFDISIDNGNEDLAEILQKLN

来源 Source

来源生物 organism	Homo sapiens
通用名 common_name	human
NCBI Class编号 ncbi_taxonomy_id	9606

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	29

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7. Fold Classification (SCOP + CATH) 18 domains

CATH v4.4 (18 domains)

Domain ID domain_id	2p2cA00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1460 —

Domain ID domain_id	2p2cB00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	1470 — Caspase-like

Domain ID domain_id	2p2cC00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1460 —

Domain ID domain_id	2p2cD00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	1470 — Caspase-like

Domain ID domain_id	2p2cE00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1460 —

Domain ID domain_id	2p2cF00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	1470 — Caspase-like

Domain ID domain_id	2p2cG00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1460 —

Domain ID domain_id	2p2cH00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	1470 — Caspase-like

Domain ID domain_id	2p2cI00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1460 —

Domain ID domain_id	2p2cJ00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	1470 — Caspase-like

Domain ID domain_id	2p2cK00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1460 —

Domain ID domain_id	2p2cL00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	1470 — Caspase-like

Domain ID domain_id	2p2cP00
Class class	1 — Mainly Alpha
Architecture architecture	25 — Alpha Horseshoe
Topology topology	40 — Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat
Homologous superfamily homologous superfamily	20 — Ankyrin repeat-containing domain

Domain ID domain_id	2p2cQ00
Class class	1 — Mainly Alpha
Architecture architecture	25 — Alpha Horseshoe
Topology topology	40 — Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat
Homologous superfamily homologous superfamily	20 — Ankyrin repeat-containing domain

Domain ID domain_id	2p2cR00
Class class	1 — Mainly Alpha
Architecture architecture	25 — Alpha Horseshoe
Topology topology	40 — Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat
Homologous superfamily homologous superfamily	20 — Ankyrin repeat-containing domain

Domain ID domain_id	2p2cS00
Class class	1 — Mainly Alpha
Architecture architecture	25 — Alpha Horseshoe
Topology topology	40 — Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat
Homologous superfamily homologous superfamily	20 — Ankyrin repeat-containing domain

Domain ID domain_id	2p2cT00
Class class	1 — Mainly Alpha
Architecture architecture	25 — Alpha Horseshoe
Topology topology	40 — Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat
Homologous superfamily homologous superfamily	20 — Ankyrin repeat-containing domain

Domain ID domain_id	2p2cU00
Class class	1 — Mainly Alpha
Architecture architecture	25 — Alpha Horseshoe
Topology topology	40 — Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat
Homologous superfamily homologous superfamily	20 — Ankyrin repeat-containing domain

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8. Citations (1)

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Unit-cell length a length_a	58.020 Å
Unit-cell length b length_b	229.210 Å
Unit-cell length c length_c	114.930 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.11 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	12

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	3.240 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	—
R_work r_work	0.2620
R_free r_free	0.3050

fit	/app/data/saxs_computation/p2/2p2c/2p2c.fit
pddf	/app/data/pr_computation/p2/2p2c/2p2c.pr.out
profile	/app/data/saxs_computation/p2/2p2c/2p2c.dat

Inhibition of caspase-2 by a designed ankyrin repeat protein (DARPin)

1. Protein Identity and Related Structures Protein Identity & Related Structures

Caspase-2

State in the Current Structure

Other States of the Same Protein in the Database

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

2. Structure Basics 2. Structure Basics

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

5. Crystallography and Experiment 5. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

6. Entities and Polymers Entities & Polymers (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

来源 Source

Entity 3 Entity 3 polymer

Polymer Polymer

来源 Source

Entity 4 Entity 4 water

7. Fold Classification (SCOP + CATH) 18 domains

CATH v4.4 (18 domains)

8. Citations (1)

9. Files and Curves (10)

Files (7)

Curves (3)