SAXSdb — 6mc6

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

DNA repair protein PprA

Deinococcus radiodurans R1

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 homooligomer Homooligomer Protein × 16 PDB declaration: hexadecameric（16） Consistent with protein copy count	Chain A； UniProt 25–300 Chain B； UniProt 25–300	Mutation：D180K, D184K	No other associated polymer	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 8；293.15 K；Protein at 4.5 mg/mL in 150 mM KCl, 20 mM Tris, pH 7.5 was mixed in 1:1 volume ratio with Wizard Classic 1 (Rigaku) #46 - a solution of 200 mM Lithium sulfate, 10% (w/v) PEG 8000 and 100 mM Imidazole/ HCl at pH 8.0. The drop was suspended over a 1.5M Ammonium sulfate dehydrating solution and incubated for about 5 weeks.	Resolution 2.75 Å R-free 0.260

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 6MC6	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
6A27 Crystal structure of PprA W183R mutant form 1 Deposited 2018-06-09	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 17–300（284 aa） Chain B 17–300（284 aa）	Mutation：W183R Mutation：W183R	SO4 SULFATE ION × 1 GOL GLYCEROL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；293 K；0.1 M Tris buffer (pH 8.5) containing 0.2 M LiSO4 and 30% PEG4000	Resolution 1.35 Å R-free 0.202
6A28 Crystal structure of PprA W183R mutant form 2 Deposited 2018-06-09	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 17–300（284 aa） Chain B 17–300（284 aa）	Mutation：W183R Non-standard monomer：Yes (specific site not provided by mmCIF) Mutation：W183R Non-standard monomer：Yes (specific site not provided by mmCIF)	SO4 SULFATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；293 K；0.1 M Tris buffer (pH 8.5) containing 0.2 M LiSO4 and 30% PEG4000	Resolution 2.19 Å R-free 0.235
6A29 Crystal structure of PprA A139R mutant Deposited 2018-06-09	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 17–300（284 aa） Chain B 17–300（284 aa）	Mutation：A139R Mutation：A139R	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；293 K；0.1 M Tris buffer (pH 8.5) containing 0.2 M LiSO4 and 30% PEG3350	Resolution 2.40 Å R-free 0.271
6A29 Crystal structure of PprA A139R mutant Deposited 2018-06-09	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 17–300（284 aa） Chain D 17–300（284 aa）	Mutation：A139R Mutation：A139R	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；293 K；0.1 M Tris buffer (pH 8.5) containing 0.2 M LiSO4 and 30% PEG3350	Resolution 2.40 Å R-free 0.271
6A29 Crystal structure of PprA A139R mutant Deposited 2018-06-09	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 3 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain E 17–300（284 aa） Chain F 17–300（284 aa）	Mutation：A139R Mutation：A139R	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；293 K；0.1 M Tris buffer (pH 8.5) containing 0.2 M LiSO4 and 30% PEG3350	Resolution 2.40 Å R-free 0.271
6A29 Crystal structure of PprA A139R mutant Deposited 2018-06-09	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 4 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain G 17–300（284 aa） Chain H 17–300（284 aa）	Mutation：A139R Mutation：A139R	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；293 K；0.1 M Tris buffer (pH 8.5) containing 0.2 M LiSO4 and 30% PEG3350	Resolution 2.40 Å R-free 0.271
6BDU Crystal structure of PprA from Deinococcus radiodurans Deposited 2017-10-24	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 25–300（276 aa） Chain B 25–300（276 aa）	Mutation：D180K, D184K Non-standard monomer：Yes (specific site not provided by mmCIF) Mutation：D180K, D184K 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 8；293.15 K；Protein at 2.4mg/mL in 150mM KCl, 20mM Tris, pH 7.5 was mixed in 1:1 volume ratio with a solution of 0.2 M Lithium Citrate Tribasic and 20 % (w/v) PEG 3350. The drop was suspended over 1.5M Ammonium sulfate.	Resolution 2.00 Å R-free 0.236
6NEO Crystal structure of PprA filament from Deinococcus radiodurans Deposited 2018-12-18	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 12 PDB declaration: dodecameric	Chain B 25–300（276 aa）	Mutation：D180K, D184K	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；293.15 K；1:1 4.9 mg/mL protein in 150 mM potassium chloride, 20 mM Tris, pH 8.0 + Morpheus II-FX96 (Molecular Dimensions) condition H2 - 40 mM polyamines (spermine tetrahydrochloride, spermidine trihydrochloride, 1,4-diaminobutane dihydrochloride, DL-ornithine monohydrochloride), 50% v/v Precipitant Mix 6 (25% w/v PEG4000, 40% w/v 1,2,6-hexanetriol), 0.1 M Buffer System 4 (Gly-Gly, AMPD) at pH 6.5. The drop was suspended over a 1.5 M ammonium sulfate dehydrating solution and incubated at 20 degrees C for about 5 months.	Resolution 5.94 Å R-free 0.309
9OM8 Crystal structure of PprA S-F filament from Deinococcus radiodurans Deposited 2025-05-13	Different construct Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 16 PDB declaration: hexadecameric	Chain A 25–300（276 aa） Chain B 25–300（276 aa） Chain C 25–300（276 aa） Chain D 25–300（276 aa）	Mutation：D180K, D184K Mutation：D180K, D184K Mutation：D180K, D184K Mutation：D180K, D184K	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293.15 K；1.0 ul of protein solution was mixed with 1.0 uL of crystallization solution and hung upside-down in a sealed chamber containing 1mL of well solution. \| Protein solution: 3.5 mg/mL PprA (117 uM), 150mM KCl, 20mM Tris, pH 7.5 \| Crystallization solution: 0.2M LiCl, 20% (w/v) PEG 3350 \| Well solution: 1.4 M (NH4)2SO4	Resolution 2.83 Å R-free 0.275
9OR6 Crystal structure of PprA S-F-S tetramer from Deinococcus radiodurans Deposited 2025-05-21	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 25–300（276 aa） Chain B 25–300（276 aa）	Mutation：D180K, D184K Mutation：D180K, D184K	SPD SPERMIDINE × 6	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293.15 K；1.5 ul of protein solution was mixed with 1.0 uL of crystallization solution and hung upside-down in a sealed chamber containing 1mL of well solution. \| Protein solution: 5.0 mg/mL PprA (168 uM), 43bp dsDNA (101 uM), 150mM KCl, 20mM Tris, pH 7.5, 1 mM MgCl2. \| Crystallization solution (Molecular Dimensions - Morpheus 2 #94): 10 mM Spermine tetrahydrochloride, 10 mM Spermidine trihydrochloride, 10 mM 1,4 Diaminobutane dihydrochloride, 10 mM DL Ornithine monohydrochloride 0.1M Gly-Gly, AMPD, pH 8.5, 13% w/v PEG 4000, 21% w/v 1,2,6 Hexanetriol. \| Well solution: 2.0 M Ammonium sulfate.	Resolution 2.90 Å R-free 0.248
9YI3 Crystal structure of PprA S-F filament from Deinococcus radiodurans Deposited 2025-10-01	Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 10 PDB declaration: decameric	Chain A 25–300（276 aa） Chain B 25–300（276 aa）	Mutation：D180K, D184K Non-standard monomer：Yes (specific site not provided by mmCIF) Mutation：D180K, D184K 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；293.15 K；1.0 ul of protein solution was mixed with 2.0 uL of crystallization solution and hung upside-down in a sealed chamber containing 1mL of well solution. \| Protein solution: 2.98 mg/mL PprA (100 uM), 150mM KCl, 20mM Tris, pH 7.5 \| Crystallization solution: 800 mM LiCl, 32% (w/v) PEG 4000, 100 mM HEPES, pH 8.0 \| Well solution: 0.8 M Ammonium sulfate	Resolution 1.82 Å R-free 0.275
9YL4 Crystal structure of PprA S-F filament from Deinococcus radiodurans Deposited 2025-10-08	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 18 PDB declaration: octadecameric	Chain A 25–300（276 aa） Chain B 25–300（276 aa） Chain C 25–300（276 aa） Chain D 25–300（276 aa） Chain E 25–300（276 aa） Chain F 25–300（276 aa）	Mutation：D180K, D184K Non-standard monomer：Yes (specific site not provided by mmCIF) Mutation：D180K, D184K Non-standard monomer：Yes (specific site not provided by mmCIF) Mutation：D180K, D184K Non-standard monomer：Yes (specific site not provided by mmCIF) Mutation：D180K, D184K Non-standard monomer：Yes (specific site not provided by mmCIF) Mutation：D180K, D184K Non-standard monomer：Yes (specific site not provided by mmCIF) Mutation：D180K, D184K 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；293.15 K；2.0 ul of protein solution was mixed with 1.0 uL of crystallization solution and hung upside-down in a sealed chamber containing 1mL of well solution. \| Protein solution: 6.4 mg/mL PprA (214 uM), 150mM KCl, 20mM Tris, pH 7.5 \| Crystallization solution (Molecular Dimensions - MCSG2 #82): 200 mM NaCl, 20% (w/v) PEG 8000, 100 mM CAPS:NaOH, pH 10.5 \| Well solution: 1.25 M Ammonium sulfate	Resolution 3.70 Å R-free 0.283
9YL4 Crystal structure of PprA S-F filament from Deinococcus radiodurans Deposited 2025-10-08	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 18 PDB declaration: octadecameric	Chain G 25–300（276 aa） Chain H 25–300（276 aa） Chain I 25–300（276 aa） Chain J 25–300（276 aa） Chain K 25–300（276 aa） Chain L 25–300（276 aa）	Mutation：D180K, D184K Non-standard monomer：Yes (specific site not provided by mmCIF) Mutation：D180K, D184K Non-standard monomer：Yes (specific site not provided by mmCIF) Mutation：D180K, D184K Non-standard monomer：Yes (specific site not provided by mmCIF) Mutation：D180K, D184K Non-standard monomer：Yes (specific site not provided by mmCIF) Mutation：D180K, D184K Non-standard monomer：Yes (specific site not provided by mmCIF) Mutation：D180K, D184K 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；293.15 K；2.0 ul of protein solution was mixed with 1.0 uL of crystallization solution and hung upside-down in a sealed chamber containing 1mL of well solution. \| Protein solution: 6.4 mg/mL PprA (214 uM), 150mM KCl, 20mM Tris, pH 7.5 \| Crystallization solution (Molecular Dimensions - MCSG2 #82): 200 mM NaCl, 20% (w/v) PEG 8000, 100 mM CAPS:NaOH, pH 10.5 \| Well solution: 1.25 M Ammonium sulfate	Resolution 3.70 Å R-free 0.283
9YUP Crystal structure of PprA S-F-S tetramer from Deinococcus radiodurans Deposited 2025-10-22	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 25–300（276 aa） Chain B 25–300（276 aa） Chain C 25–300（276 aa） Chain D 25–300（276 aa）	Mutation：D180K, D184K Non-standard monomer：Yes (specific site not provided by mmCIF) Mutation：D180K, D184K Non-standard monomer：Yes (specific site not provided by mmCIF) Mutation：D180K, D184K Non-standard monomer：Yes (specific site not provided by mmCIF) Mutation：D180K, D184K Non-standard monomer：Yes (specific site not provided by mmCIF)	FLC CITRATE ANION × 3	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；293.15 K；1.0 ul of protein solution was mixed with 1.0 uL of crystallization solution and hung upside-down in a sealed chamber containing 1mL of well solution. \| Protein solution: 2.4 mg/mL PprA (73 uM), 150mM KCl, 20mM Tris, pH 7.5 \| Crystallization solution: 400 mM Lithium citrate, 20% (w/v) PEG 3350 \| Well solution: 1.5 M Ammonium sulfate	Resolution 2.07 Å R-free 0.236

10 other PDB entries and 14 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	PPRA_DEIRA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 3–278； UniProt 25–300 Author chain B； PDBConstruct 3–278； UniProt 25–300

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.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	6mc6
Deposition date deposition_date	2018-08-30
Structure title title	Crystal structure of PprA filament from Deinococcus radiodurans
Keywords keywords	DNA damage repair, Radiation induced, Genome segregation, Filment formation, DNA BINDING PROTEIN; DNA BINDING PROTEIN
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	34.42 Å
Radius of gyration Rg (electron density) rg_electron	34.60 Å
Forward intensity I(0) i0	56078000.00
Molecular weight molecular_weight	57547.0 kDa
Excluded volume excluded_volume	71300 Å³
Envelope volume envelope_volume	97356 Å³
Hydration-shell volume shell_volume	25905 Å³
Envelope diameter envelope_diameter	128.3 Å
Shell Rg shell_rg	36.83 Å
Envelope Rg envelope_rg	34.90 Å
Shape Rg shape_rg	34.53 Å
Total Rg total_rg	35.00 Å
Total atoms total_atoms	4061
Residues n_residues	540
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	125.3 Å
Rg (real space) rg_real	34.92 Å
Rg uncertainty (real space) rg_real_error	1.53 Å
I(0) (real space) i0_real	5.6080e+07
I(0) uncertainty (real space) i0_real_error	9.8790e+05
Rg (reciprocal space) rg_reciprocal	34.61 Å
I(0) (reciprocal space) i0_reciprocal	56060000.0000
Solution quality estimate total_estimate	0.7517
Solution quality rating solution_quality	GOOD a GOOD solution
P(r) peaks n_peaks	1
Primary peak position r_peak_primary	27.2 Å
Skewness Skewness skewness	0.632
Kurtosis Kurtosis kurtosis	-0.193
Angular range angular_range	— – 0.2300 Å⁻¹
Current regularization parameter α current_alpha	0.0000
Highest regularization parameter α highest_alpha	6756000.0000
Real-space data points n_real_points	47
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.557; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.427; Smooth: 0.670

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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (2)

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8. Citations (1)

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Unit-cell length a length_a	56.780 Å
Unit-cell length b length_b	90.950 Å
Unit-cell length c length_c	121.110 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	P 2 21 21
Space-group number int_tables_number	18
Crystal system crystal_system	orthorhombic

Resolution resolution	2.747 Å
Low-resolution limit resolution_low	51.410 Å
R factor r_factor	0.2136
R_work r_work	0.2112
R_free r_free	0.2600

Description description	DNA repair protein PprA
Molecular weight formula_weight	29919.5 kDa
Mutation mutation	D180K, D184K
Source method src_method	man
Copy count entity_count	2

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	4105

Crystal structure of PprA filament from Deinococcus radiodurans

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

DNA repair protein PprA

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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

来源 Source

Entity 2 Entity 2 water

8. Citations (1)

9. Files and Curves (10)

Files (7)

Curves (3)

来源生物 organism	Deinococcus radiodurans R1
NCBI Class编号 ncbi_taxonomy_id	243230
宿主生物 host_organism	Escherichia coli BL21(DE3)

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	44

fit	/app/data/saxs_computation/mc/6mc6/6mc6.fit
pddf	/app/data/pr_computation/mc/6mc6/6mc6.pr.out
profile	/app/data/saxs_computation/mc/6mc6/6mc6.dat