SAXSdb — 2x31

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

MAGNESIUM-CHELATASE 60 KDA SUBUNIT

RHODOBACTER CAPSULATUS

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 12	MAGNESIUM-CHELATASE 38 KDA SUBUNIT × 6 （P26239）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	BCHD_RHOCA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–189； UniProt 373–561 Author chain B； PDBConstruct 1–189； UniProt 373–561 Author chain C； PDBConstruct 1–189； UniProt 373–561 Author chain D； PDBConstruct 1–189； UniProt 373–561 Author chain E； PDBConstruct 1–189； UniProt 373–561 Author chain F； PDBConstruct 1–189； UniProt 373–561

MAGNESIUM-CHELATASE 38 KDA SUBUNIT

RHODOBACTER CAPSULATUS

UniProt P26239

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 12	MAGNESIUM-CHELATASE 60 KDA SUBUNIT × 6 （P26175）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	BCHI_RHOCA
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain G； PDBConstruct 1–350； UniProt 1–350 Author chain H； PDBConstruct 1–350； UniProt 1–350 Author chain I； PDBConstruct 1–350； UniProt 1–350 Author chain J； PDBConstruct 1–350； UniProt 1–350 Author chain K； PDBConstruct 1–350； UniProt 1–350 Author chain L； PDBConstruct 1–350； UniProt 1–350

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	2x31
Deposition date deposition_date	2010-01-19
Structure title title	Modelling of the complex between subunits BchI and BchD of magnesium chelatase based on single-particle cryo-EM reconstruction at 7.5 ang
Keywords keywords	LIGASE, BACTERIOCHLOROPHYLL BIOSYNTHESIS, PHOTOSYNTHESIS; LIGASE
Experimental Method method	ELECTRON MICROSCOPY

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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

2x31__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

2x31__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2x31__assembly_1__model_1 | P(r) · Pending

P(r) will be calculated and displayed separately for the same assembly/model.

Rg（Guinier）	52.64 Å
Rg (electron density)	52.03 Å
Total Rg	52.33 Å
Atom count	22890
Residues	3060
Excluded volume	408180 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2x31__assembly_1__model_1`	dodecameric （12）	Success	4.1.3-1-20251215 (887e7ef)	View Download

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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (2)

Entity 1 Entity 1 polymer

Description description	MAGNESIUM-CHELATASE 60 KDA SUBUNIT
Molecular weight formula_weight	19666.8 kDa
EC 编号 ec_number	6.6.1.1
Source method src_method	man
Copy count entity_count	6

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F
Atom count atom_count	22890

KEMSDRVLIFAVDASGSAAVARLSEAKGAVELLLGRAYAARDHVSLITFRGTAAQVLLQPSRSLTQTKRQLQGLPGGGGTPLASGMEMAMVTAKQARSRGMTPTIALLTDGRGNIALDGTANRELAGEQATKVARAIRASGMPAVIIDTAMRPNPALVDLARTMDAHYIALPRATAHKMADVLGAALEA

Source Source

Source organism organism	RHODOBACTER CAPSULATUS
NCBI taxonomy ID ncbi_taxonomy_id	1061
Host organism host_organism	ESCHERICHIA COLI

Entity 2 Entity 2 polymer

Description description	MAGNESIUM-CHELATASE 38 KDA SUBUNIT
Molecular weight formula_weight	37946.3 kDa
EC 编号 ec_number	6.6.1.1
Source method src_method	man
Copy count entity_count	6

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	G,H,I,J,K,L

MTTAVARLQPSASGAKTRPVFPFSAIVGQEDMKLALLLTAVDPGIGGVLVFGDRGTGKSTAVRALAALLPEIEAVEGCPVSSPNVEMIPDWATVLSTNVIRKPTPVVDLPLGVSEDRVVGALDIERAISKGEKAFEPGLLARANRGYLYIDECNLLEDHIVDLLLDVAQSGENVVERDGLSIRHPARFVLVGSGNPEEGDLRPQLLDRFGLSVEVLSPRDVETRVEVIRRRDTYDADPKAFLEEWRPKDMDIRNQILEARERLPKVEAPNTALYDCAALCIALGSDGLRGELTLLRSARALAALEGATAVGRDHLKRVATMALSHRLRRDPLDEAGSTARVARTVEETLP

Source Source

Source organism organism	RHODOBACTER CAPSULATUS
NCBI taxonomy ID ncbi_taxonomy_id	1061
Host organism host_organism	ESCHERICHIA COLI

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Unit-cell length a length_a	1.000 Å
Unit-cell length b length_b	1.000 Å
Unit-cell length c length_c	1.000 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	1

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

Resolution resolution	7.500 Å
Low-resolution limit resolution_low	— Å
R factor r_factor	—
R_work r_work	—
R_free r_free	—

Resolution resolution	7.50 Å
Resolution测定Method resolution_method	—
颗粒数 num_particles	29400

Modelling of the complex between subunits BchI and BchD of magnesium chelatase based on single-particle cryo-EM reconstruction at 7.5 ang

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

MAGNESIUM-CHELATASE 60 KDA SUBUNIT

State in the Current Structure

Other States of the Same Protein in the Database

MAGNESIUM-CHELATASE 38 KDA SUBUNIT

State in the Current Structure

Other States of the Same Protein in the Database

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

2x31__assembly_1__model_1

2x31__assembly_1__model_1 | I(q)

2x31__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

冷冻电镜 EM 3D

5. Entities and Polymers Entities & Polymers (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

7. Citations (1)

Modelling of the complex between subunits BchI and BchD of magnesium chelatase based on single-particle cryo-EM reconstruction at 7.5 ang

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

MAGNESIUM-CHELATASE 60 KDA SUBUNIT

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

MAGNESIUM-CHELATASE 38 KDA SUBUNIT

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

2x31__assembly_1__model_1

2x31__assembly_1__model_1 | I(q)

2x31__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

冷冻电镜 EM 3D

5. Entities and Polymers Entities & Polymers (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

7. Citations (1)