1ir1

Crystal Structure of Spinach Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase (Rubisco) Complexed with CO2, Mg2+ and 2-Carboxyarabinitol-1,5-Bisphosphate

Method: X-RAY DIFFRACTION D_max: 136.7 Å Quality: GOOD

▼

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

Large subunit of Rubisco

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 × 16 PDB declaration: hexadecameric（16） Consistent with protein copy count	Chain A； UniProt 1–475 Chain B； UniProt 1–475 Chain C； UniProt 1–475 Chain D； UniProt 1–475	Non-standard monomer：Yes (specific site not provided by mmCIF)	Small subunit of Rubisco × 8 （Q43832） MG MAGNESIUM ION × 8 CAP 2-CARBOXYARABINITOL-1,5-DIPHOSPHATE × 8	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION；pH 7.9；293 K；PEG4000, MgCl2, NaHCO3, DTT, 2-carboxyarabinitol-1,5-bisphosphate, Bicine, pH 7.9, VAPOR DIFFUSION, temperature 293K	Resolution 1.80 Å R-free 0.179

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 1IR1	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1AA1 ACTIVATED SPINACH RUBISCO IN COMPLEX WITH THE PRODUCT 3-PHOSPHOGLYCERATE Deposited 1997-01-20	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric	Chain B 1–475（475 aa） Chain E 1–475（475 aa） Chain H 1–475（475 aa） Chain L 1–475（475 aa）	Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF)	MG MAGNESIUM ION × 8 3PG 3-PHOSPHOGLYCERIC ACID × 16	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.2；14% PEG 4000, 0.2 M NACL, 25 MM HEPES PH 7.8 10 MM MGCL2, 100 MM 3-PHOSPHOGLYCERATE, pH 7.2	Resolution 2.20 Å R-free 0.224
1AUS ACTIVATED UNLIGANDED SPINACH RUBISCO Deposited 1995-06-21	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric	Chain L 1–475（475 aa） Chain M 1–475（475 aa） Chain N 1–475（475 aa） Chain O 1–475（475 aa）	Not recorded	MG MAGNESIUM ION × 8 FMT FORMIC ACID × 8	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 2.20 Å R-free 0.239
1RBO SPINACH RUBISCO IN COMPLEX WITH THE INHIBITOR 2-CARBOXYARABINITOL-1,5-DIPHOSPHATE Deposited 1996-10-31	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric	Chain B 1–475（475 aa） Chain E 1–475（475 aa） Chain H 1–475（475 aa） Chain L 1–475（475 aa）	Not recorded	CAP 2-CARBOXYARABINITOL-1,5-DIPHOSPHATE × 8	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.4；1.7 M (NH4)2SO4, 50 MM PHOSPHATE, PH 7.4 3 MM MGCL2, 25 MM NAHCO3, 10 MM 4CABP	Resolution 2.30 Å R-free 0.171
1RCO SPINACH RUBISCO IN COMPLEX WITH THE INHIBITOR D-XYLULOSE-2,2-DIOL-1,5-BISPHOSPHATE Deposited 1996-10-31	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric	Chain B 1–475（475 aa） Chain E 1–475（475 aa） Chain H 1–475（475 aa） Chain K 1–475（475 aa） Chain L 1–475（475 aa） Chain O 1–475（475 aa） Chain R 1–475（475 aa） Chain V 1–475（475 aa）	Not recorded	XDP D-XYLULOSE-2,2-DIOL-1,5-BISPHOSPHATE × 8	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.8；15% PEG 4000, 25 MM HEPES PH 7.8, 10 MM CACL2, 0.2 M NACL, 50 MM NAHCO3, 20 MM XUBP	Resolution 2.30 Å R-free 0.246
1RCX NON-ACTIVATED SPINACH RUBISCO IN COMPLEX WITH ITS SUBSTRATE RIBULOSE-1,5-BISPHOSPHATE Deposited 1996-12-06	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric	Chain B 1–475（475 aa） Chain E 1–475（475 aa） Chain H 1–475（475 aa） Chain K 1–475（475 aa） Chain L 1–475（475 aa） Chain O 1–475（475 aa） Chain R 1–475（475 aa） Chain V 1–475（475 aa）	Not recorded	RUB RIBULOSE-1,5-DIPHOSPHATE × 8	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.8；12% PEG 4000, 25 MM HEPES PH 7.8, 0.2 M NACL, 20 MM RUBP	Resolution 2.40 Å R-free 0.237
1RXO ACTIVATED SPINACH RUBISCO IN COMPLEX WITH ITS SUBSTRATE RIBULOSE-1,5-BISPHOSPHATE AND CALCIUM Deposited 1996-12-06	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric	Chain B 1–475（475 aa） Chain E 1–475（475 aa） Chain H 1–475（475 aa） Chain L 1–475（475 aa）	Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF)	RUB RIBULOSE-1,5-DIPHOSPHATE × 8 CA CALCIUM ION × 8	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.8；14% PEG4000, 25 MM HEPES PH 7.8, 0.2 M NACL, 10 MM CACL2; SOAKED WITH 20 MM RUBP FOR 5 DAYS	Resolution 2.20 Å R-free 0.229
1UPM ACTIVATED SPINACH RUBISCO COMPLEXED WITH 2-CARBOXYARABINITOL 2 BISPHOSPHAT AND CA2+. Deposited 2003-10-08	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric	Chain B 1–475（475 aa） Chain E 1–475（475 aa） Chain H 1–475（475 aa） Chain K 1–475（475 aa） Chain L 1–475（475 aa） Chain O 1–475（475 aa） Chain R 1–475（475 aa） Chain V 1–475（475 aa）	Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF)	CA CALCIUM ION × 8 CAP 2-CARBOXYARABINITOL-1,5-DIPHOSPHATE × 8	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.8；10% PEG 4000, 0.1 M HEPES PH 7.8, 10 MM CACL2, 0.2 M NACL, 50 MM NAHCO3, 1MM 2-CABP	Resolution 2.30 Å R-free 0.200
1UPP SPINACH RUBISCO IN COMPLEX WITH 2-CARBOXYARABINITOL 2 BISPHOSPHATE and Calcium. Deposited 2003-10-09	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric	Chain A 1–475（475 aa） Chain C 1–475（475 aa） Chain E 1–475（475 aa） Chain G 1–475（475 aa）	Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF)	CA CALCIUM ION × 8 CAP 2-CARBOXYARABINITOL-1,5-DIPHOSPHATE × 8	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.8；10% PEG 4000, 0.1M HEPES PH 7.8, 10 MM CACL2, 0.2 M NACL, 50 MM NAHCO3, 0.1 M 3PGA THEN SOAKED IN 2-CABP	Resolution 2.30 Å R-free 0.307
8QJ0 Room-temperature Serial Synchrotron Crystallography structure of Spinacia oleracea RuBisCO Deposited 2023-09-12	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric	Chain L 1–475（475 aa） Chain M 1–475（475 aa） Chain N 1–475（475 aa） Chain O 1–475（475 aa）	Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF)	MG MAGNESIUM ION × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293 K；SpRub solution at a concentration of 15 mg/mL (in a buffer of 20 mM HEPES, 5 mM MgCl2, pH 8.0), combined reservoir solution (0.2 M MgCl2x6H2O, 0.1 M Tris pH 7.0, 12% w/v PEG 8000	Resolution 2.30 Å R-free 0.227
8RUC ACTIVATED SPINACH RUBISCO COMPLEXED WITH 2-CARBOXYARABINITOL BISPHOSPHATE Deposited 1996-02-22	Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric	Chain A 1–475（475 aa） Chain C 1–475（475 aa） Chain E 1–475（475 aa） Chain G 1–475（475 aa）	Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF)	MG MAGNESIUM ION × 8 CAP 2-CARBOXYARABINITOL-1,5-DIPHOSPHATE × 8	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.5；pH 7.5	Resolution 1.60 Å
9CQ5 Mn-bound RuBisCO from spinach with CABP inhibitor Deposited 2024-07-19	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric	Chain A 1–475（475 aa） Chain B 1–475（475 aa） Chain C 1–475（475 aa） Chain D 1–475（475 aa） Chain E 1–475（475 aa） Chain F 1–475（475 aa） Chain G 1–475（475 aa） Chain H 1–475（475 aa）	Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF)	MN MANGANESE (II) ION × 8 CAP 2-CARBOXYARABINITOL-1,5-DIPHOSPHATE × 8	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.3；298 K；PEG 3350, lithium acetate, potassium phosphate	Resolution 2.50 Å R-free 0.242

11 other PDB entries and 11 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	RBL_SPIOL
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–475； UniProt 1–475 Author chain B； PDBConstruct 1–475； UniProt 1–475 Author chain C； PDBConstruct 1–475； UniProt 1–475 Author chain D； PDBConstruct 1–475； UniProt 1–475

Small subunit of Rubisco

OrganismNot specified

UniProt Q43832

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 × 16 PDB declaration: hexadecameric（16） Consistent with protein copy count	Chain S； UniProt 58–180 Chain T； UniProt 58–180 Chain U； UniProt 58–180 Chain V； UniProt 58–180	Non-standard monomer：Yes (specific site not provided by mmCIF)	Large subunit of Rubisco × 8 （P00875） MG MAGNESIUM ION × 8 CAP 2-CARBOXYARABINITOL-1,5-DIPHOSPHATE × 8	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION；pH 7.9；293 K；PEG4000, MgCl2, NaHCO3, DTT, 2-carboxyarabinitol-1,5-bisphosphate, Bicine, pH 7.9, VAPOR DIFFUSION, temperature 293K	Resolution 1.80 Å R-free 0.179

Other States of the Same Protein in the Database

Other PDB	Difference from Current Entry 1IR1	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1AA1 ACTIVATED SPINACH RUBISCO IN COMPLEX WITH THE PRODUCT 3-PHOSPHOGLYCERATE Deposited 1997-01-20	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric	Chain C 58–180（123 aa） Chain F 58–180（123 aa） Chain I 58–180（123 aa） Chain S 58–180（123 aa）	Not recorded	MG MAGNESIUM ION × 8 3PG 3-PHOSPHOGLYCERIC ACID × 16	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.2；14% PEG 4000, 0.2 M NACL, 25 MM HEPES PH 7.8 10 MM MGCL2, 100 MM 3-PHOSPHOGLYCERATE, pH 7.2	Resolution 2.20 Å R-free 0.224
1AUS ACTIVATED UNLIGANDED SPINACH RUBISCO Deposited 1995-06-21	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric	Chain S 58–180（123 aa） Chain T 58–180（123 aa） Chain U 58–180（123 aa） Chain V 58–180（123 aa）	Not recorded	MG MAGNESIUM ION × 8 FMT FORMIC ACID × 8	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 2.20 Å R-free 0.239
1UPM ACTIVATED SPINACH RUBISCO COMPLEXED WITH 2-CARBOXYARABINITOL 2 BISPHOSPHAT AND CA2+. Deposited 2003-10-08	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric	Chain C 58–180（123 aa） Chain F 58–180（123 aa） Chain I 58–180（123 aa） Chain M 58–180（123 aa） Chain P 58–180（123 aa） Chain S 58–180（123 aa） Chain T 58–180（123 aa） Chain W 58–180（123 aa）	Not recorded	CA CALCIUM ION × 8 CAP 2-CARBOXYARABINITOL-1,5-DIPHOSPHATE × 8	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.8；10% PEG 4000, 0.1 M HEPES PH 7.8, 10 MM CACL2, 0.2 M NACL, 50 MM NAHCO3, 1MM 2-CABP	Resolution 2.30 Å R-free 0.200
1UPP SPINACH RUBISCO IN COMPLEX WITH 2-CARBOXYARABINITOL 2 BISPHOSPHATE and Calcium. Deposited 2003-10-09	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric	Chain I 58–180（123 aa） Chain J 58–180（123 aa） Chain K 58–180（123 aa） Chain L 58–180（123 aa）	Not recorded	CA CALCIUM ION × 8 CAP 2-CARBOXYARABINITOL-1,5-DIPHOSPHATE × 8	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.8；10% PEG 4000, 0.1M HEPES PH 7.8, 10 MM CACL2, 0.2 M NACL, 50 MM NAHCO3, 0.1 M 3PGA THEN SOAKED IN 2-CABP	Resolution 2.30 Å R-free 0.307
1UZD Chlamydomonas,Spinach Chimeric Rubisco Deposited 2004-03-11	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 16 PDB declaration: hexadecameric	Chain C 103–121（19 aa） Chain F 103–121（19 aa） Chain I 103–121（19 aa） Chain J 103–121（19 aa） Chain M 103–121（19 aa） Chain P 103–121（19 aa） Chain T 103–121（19 aa） Chain W 103–121（19 aa）	Not recorded	MG MAGNESIUM ION × 8 CAP 2-CARBOXYARABINITOL-1,5-DIPHOSPHATE × 8 EDO 1,2-ETHANEDIOL × 54	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.5；291 K；50 MM HEPES PH 7.5, 8-12% PEG 4 50 MM NAHCO3, 5 MM MGCL2, 50 UM 2-CABP, 18 DEG C, 10-15 MG PROTEIN	Resolution 2.40 Å R-free 0.230
8QJ0 Room-temperature Serial Synchrotron Crystallography structure of Spinacia oleracea RuBisCO Deposited 2023-09-12	Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric	Chain S 58–180（123 aa） Chain T 58–180（123 aa） Chain U 58–180（123 aa） Chain V 58–180（123 aa）	Not recorded	MG MAGNESIUM ION × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293 K；SpRub solution at a concentration of 15 mg/mL (in a buffer of 20 mM HEPES, 5 mM MgCl2, pH 8.0), combined reservoir solution (0.2 M MgCl2x6H2O, 0.1 M Tris pH 7.0, 12% w/v PEG 8000	Resolution 2.30 Å R-free 0.227
9CQ5 Mn-bound RuBisCO from spinach with CABP inhibitor Deposited 2024-07-19	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 16 PDB declaration: hexadecameric	Chain I 58–180（123 aa） Chain J 58–180（123 aa） Chain K 58–180（123 aa） Chain L 58–180（123 aa） Chain M 58–180（123 aa） Chain N 58–180（123 aa） Chain O 58–180（123 aa） Chain P 58–180（123 aa）	Not recorded	MN MANGANESE (II) ION × 8 CAP 2-CARBOXYARABINITOL-1,5-DIPHOSPHATE × 8	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.3；298 K；PEG 3350, lithium acetate, potassium phosphate	Resolution 2.50 Å R-free 0.242

7 other PDB entries and 7 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	RBS2_SPIOL
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain S； PDBConstruct 1–123； UniProt 58–180 Author chain T； PDBConstruct 1–123； UniProt 58–180 Author chain U； PDBConstruct 1–123； UniProt 58–180 Author chain V； PDBConstruct 1–123； UniProt 58–180

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

▼

2. Structure Basics 2. Structure Basics

Entry ID entry_id	1ir1
Deposition date deposition_date	2001-08-31
Structure title title	Crystal Structure of Spinach Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase (Rubisco) Complexed with CO2, Mg2+ and 2-Carboxyarabinitol-1,5-Bisphosphate
Keywords keywords	ALPHA/BETA BARREL, LYASE; LYASE
Experimental Method method	X-RAY DIFFRACTION

▼

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

Radius of gyration Rg (Guinier) rg_guinier	43.41 Å
Radius of gyration Rg (electron density) rg_electron	43.03 Å
Forward intensity I(0) i0	1049100000.00
Molecular weight molecular_weight	266670.0 kDa
Excluded volume excluded_volume	332510 Å³
Envelope volume envelope_volume	437960 Å³
Hydration-shell volume shell_volume	79895 Å³
Envelope diameter envelope_diameter	134.8 Å
Shell Rg shell_rg	51.67 Å
Envelope Rg envelope_rg	43.10 Å
Shape Rg shape_rg	43.03 Å
Total Rg total_rg	43.36 Å
Total atoms total_atoms	18784
Residues n_residues	2340
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

▼

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

Maximum dimension Dmax dmax	136.7 Å
Rg (real space) rg_real	43.18 Å
Rg uncertainty (real space) rg_real_error	1.11 Å
I(0) (real space) i0_real	1.0490e+09
I(0) uncertainty (real space) i0_real_error	2.0730e+07
Rg (reciprocal space) rg_reciprocal	43.41 Å
I(0) (reciprocal space) i0_reciprocal	1049000000.0000
Solution quality estimate total_estimate	0.8970
Solution quality rating solution_quality	GOOD a GOOD solution
P(r) peaks n_peaks	1
Primary peak position r_peak_primary	60.8 Å
Skewness Skewness skewness	0.088
Kurtosis Kurtosis kurtosis	-0.563
Angular range angular_range	— – 0.1800 Å⁻¹
Current regularization parameter α current_alpha	0.0000
Highest regularization parameter α highest_alpha	279300000.0000
Real-space data points n_real_points	37
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.915; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.988; Smooth: 0.923

▶

5. Crystallography and Experiment 5. Crystallography & Experiment

▶

6. Entities and Polymers Entities & Polymers (5)

Entity 1 Entity 1 polymer

Description description	Large subunit of Rubisco
Molecular weight formula_weight	52849.7 kDa
EC 编号 ec_number	4.1.1.39
Source method src_method	nat
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	21056

MSPQTETKASVEFKAGVKDYKLTYYTPEYETLDTDILAAFRVSPQPGVPPEEAGAAVAAESSTGTWTTVWTDGLTNLDRYKGRCYHIEPVAGEENQYICYVAYPLDLFEEGSVTNMFTSIVGNVFGFKALRALRLEDLRIPVAYVKTFQGPPHGIQVERDKLNKYGRPLLGCTIKPKLGLSAKNYGRAVYECLRGGLDFTKDDENVNSQPFMRWRDRFLFCAEALYKAQAETGEIKGHYLNATAGTCEDMMKRAVFARELGVPIVMHDYLTGGFTANTTLSHYCRDNGLLLHIHRAMHAVIDRQKNHGMHFRVLAKALRLSGGDHIHSGTVVGKLEGERDITLGFVDLLRDDYTEKDRSRGIYFTQSWVSTPGVLPVASGGIHVWHMPALTEIFGDDSVLQFGGGTLGHPWGNAPGAVANRVALEACVQARNEGRDLAREGNTIIREATKWSPELAAACEVWKEIKFEFPAMDTV

Entity 2 Entity 2 polymer

Description description	Small subunit of Rubisco
Molecular weight formula_weight	14687.7 kDa
EC 编号 ec_number	4.1.1.39
Source method src_method	nat
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	S,T,U,V

MKVWPTQNMKRYETLSYLPPLTTDQLARQVDYLLNNKWVPCLEFETDHGFVYREHHNSPGYYDGRYWTMWKLPMFGCTDPAQVLNELEECKKEYPNAFIRIIGFDSNRQVQCVSFIAYKPAGY

Entity 3 Entity 3 non-polymer

Description description	MAGNESIUM ION
Molecular weight formula_weight	24.3 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 4 Entity 4 non-polymer

Description description	2-CARBOXYARABINITOL-1,5-DIPHOSPHATE
Molecular weight formula_weight	356.1 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	2272

▼

7. Fold Classification (SCOP + CATH) 24 domains

SCOP 2.08 (12 domains)

Domain ID domain_id	d1ir1a1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.14 — RuBisCo, C-terminal domain
Family Family family	c.1.14.1 — RuBisCo, large subunit, C-terminal domain

Domain ID domain_id	d1ir1a2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.9 — RuBisCO, large subunit, small (N-terminal) domain
Family Family family	d.58.9.1 — Ribulose 1,5-bisphosphate carboxylase-oxygenase

Domain ID domain_id	d1ir1b1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.14 — RuBisCo, C-terminal domain
Family Family family	c.1.14.1 — RuBisCo, large subunit, C-terminal domain

Domain ID domain_id	d1ir1b2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.9 — RuBisCO, large subunit, small (N-terminal) domain
Family Family family	d.58.9.1 — Ribulose 1,5-bisphosphate carboxylase-oxygenase

Domain ID domain_id	d1ir1c1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.14 — RuBisCo, C-terminal domain
Family Family family	c.1.14.1 — RuBisCo, large subunit, C-terminal domain

Domain ID domain_id	d1ir1c2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.9 — RuBisCO, large subunit, small (N-terminal) domain
Family Family family	d.58.9.1 — Ribulose 1,5-bisphosphate carboxylase-oxygenase

Domain ID domain_id	d1ir1d1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.14 — RuBisCo, C-terminal domain
Family Family family	c.1.14.1 — RuBisCo, large subunit, C-terminal domain

Domain ID domain_id	d1ir1d2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.9 — RuBisCO, large subunit, small (N-terminal) domain
Family Family family	d.58.9.1 — Ribulose 1,5-bisphosphate carboxylase-oxygenase

Domain ID domain_id	d1ir1s_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.73 — RuBisCO, small subunit
Superfamily Superfamily superfamily	d.73.1 — RuBisCO, small subunit
Family Family family	d.73.1.1 — RuBisCO, small subunit

Domain ID domain_id	d1ir1t_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.73 — RuBisCO, small subunit
Superfamily Superfamily superfamily	d.73.1 — RuBisCO, small subunit
Family Family family	d.73.1.1 — RuBisCO, small subunit

Domain ID domain_id	d1ir1u_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.73 — RuBisCO, small subunit
Superfamily Superfamily superfamily	d.73.1 — RuBisCO, small subunit
Family Family family	d.73.1.1 — RuBisCO, small subunit

Domain ID domain_id	d1ir1v_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.73 — RuBisCO, small subunit
Superfamily Superfamily superfamily	d.73.1 — RuBisCO, small subunit
Family Family family	d.73.1.1 — RuBisCO, small subunit

CATH v4.4 (12 domains)

Domain ID domain_id	1ir1A01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	150 — RuBisCO large subunit, N-terminal domain

Domain ID domain_id	1ir1A02
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	110 — Ribulose bisphosphate carboxylase, large subunit, C-terminal domain

Domain ID domain_id	1ir1B01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	150 — RuBisCO large subunit, N-terminal domain

Domain ID domain_id	1ir1B02
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	110 — Ribulose bisphosphate carboxylase, large subunit, C-terminal domain

Domain ID domain_id	1ir1C01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	150 — RuBisCO large subunit, N-terminal domain

Domain ID domain_id	1ir1C02
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	110 — Ribulose bisphosphate carboxylase, large subunit, C-terminal domain

Domain ID domain_id	1ir1D01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	150 — RuBisCO large subunit, N-terminal domain

Domain ID domain_id	1ir1D02
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	110 — Ribulose bisphosphate carboxylase, large subunit, C-terminal domain

Domain ID domain_id	1ir1S00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	190 — Ribulose 1,5 Bisphosphate Carboxylase/Oxygenase
Homologous superfamily homologous superfamily	10 — Ribulose bisphosphate carboxylase, small subunit

Domain ID domain_id	1ir1T00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	190 — Ribulose 1,5 Bisphosphate Carboxylase/Oxygenase
Homologous superfamily homologous superfamily	10 — Ribulose bisphosphate carboxylase, small subunit

Domain ID domain_id	1ir1U00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	190 — Ribulose 1,5 Bisphosphate Carboxylase/Oxygenase
Homologous superfamily homologous superfamily	10 — Ribulose bisphosphate carboxylase, small subunit

Domain ID domain_id	1ir1V00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	190 — Ribulose 1,5 Bisphosphate Carboxylase/Oxygenase
Homologous superfamily homologous superfamily	10 — Ribulose bisphosphate carboxylase, small subunit

▶

8. Citations (1)

▶

Unit-cell length a length_a	157.800 Å
Unit-cell length b length_b	157.800 Å
Unit-cell length c length_c	200.900 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	32

Space group space_group	C 2 2 21
Space-group number int_tables_number	20
Crystal system crystal_system	—

Resolution resolution	1.800 Å
Low-resolution limit resolution_low	10.000 Å
R factor r_factor	—
R_work r_work	0.1550
R_free r_free	0.1790

fit	/app/data/saxs_computation/ir/1ir1/1ir1.fit
pddf	/app/data/pr_computation/ir/1ir1/1ir1.pr.out
profile	/app/data/saxs_computation/ir/1ir1/1ir1.dat

Crystal Structure of Spinach Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase (Rubisco) Complexed with CO2, Mg2+ and 2-Carboxyarabinitol-1,5-Bisphosphate

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

Large subunit of Rubisco

State in the Current Structure

Other States of the Same Protein in the Database

Small subunit of Rubisco

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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

7. Fold Classification (SCOP + CATH) 24 domains

SCOP 2.08 (12 domains)

CATH v4.4 (12 domains)

8. Citations (1)

9. Files and Curves (10)

Files (7)

Curves (3)