SAXSdb — 3pxi

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

Adapter protein mecA 1

Bacillus subtilis

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 6	Negative regulator of genetic competence ClpC/MecB × 3 （P37571）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	MECA1_BACSU
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain a； PDBConstruct 1–111； UniProt 108–218 Author chain b； PDBConstruct 1–111； UniProt 108–218 Author chain c； PDBConstruct 1–111； UniProt 108–218

Negative regulator of genetic competence ClpC/MecB

Bacillus subtilis

UniProt P37571

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 6	Adapter protein mecA 1 × 3 （P37958）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CLPC_BACSU
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain A； PDBConstruct 1–758； UniProt 1–810 Author chain B； PDBConstruct 1–758； UniProt 1–810 Author chain C； PDBConstruct 1–758； UniProt 1–810

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	3pxi
Deposition date deposition_date	2010-12-09
Structure title title	Structure of MecA108:ClpC
Keywords keywords	ClpB, proteolysis, ClpC, ClpX, Hsp100/Clp, AAA+ proteins, PROTEIN BINDING; PROTEIN BINDING
Experimental Method method	X-RAY DIFFRACTION

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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.

3pxi__assembly_1__model_1

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

Download this curve (.dat)

3pxi__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3pxi__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	52.15 Å
Rg (electron density)	51.80 Å
Total Rg	51.93 Å
Atom count	18645
Residues	2405
Excluded volume	331690 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3pxi__assembly_1__model_1`	hexameric （6）	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	Adapter protein mecA 1
Molecular weight formula_weight	13080.5 kDa
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	a,b,c
Atom count atom_count	18645

LDDFQKEEQAVNQEEKEQKLQFVLRFGDFEDVISLSKLNVNGSKTTLYSFENRYYLYVDFCNMTDEEVENQLSILLEYATESSISIHRLEEYGKLIISEHALETIKKHFAS

Source Source

Source organism organism	Bacillus subtilis
NCBI taxonomy ID ncbi_taxonomy_id	1423
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 polymer

Description description	Negative regulator of genetic competence ClpC/MecB
Molecular weight formula_weight	84586.4 kDa
Mutation mutation	E280A, E618A
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C

MMFGRFTERAQKVLALAQEEALRLGHNNIGTEHILLGLVREGEGIAAKALQALGLGSEKIQKEVESLIGRGQEMSQTIHYTPRAKKVIELSMDEARKLGHSYVGTEHILLGLIREGEGVAARVLNNLGVSLNKARQQVLQLLGSNETGSSAAGTNSNANTPTLDSLARDLTAIAKEDSLDPVIGRSKEIQRVIEVLSRRTKNNPVLIGEPGVGKTAIAEGLAQQIINNEVPEILRDKRVMTLDMGTKYRGEFEDRLKKVMDEIRQAGNIILFIDAAIDASNILKPSLARGELQCIGATTLDEYRKYIEKDAALERRFQPIQVDQPSVDESIQILQGLRDRYEAHHRVSITDDAIEAAVKLSDRYISDRFLPDKAIDLIDEAGSKVRLRSFTTPPNLKELEQKLDEVRKEKDAAVQSQEFEKAASLRDTEQRLREQVEDTKKSWKEKQGQENSEVTVDDIAMVVSSWTGVPVSKIAQTETDKLLNMENILHSRVIGQDEAVVAVAKAVRRARAGLKDPKRPIGSFIFLGPTGVGKTELARALAESIFGDEESMIRIDMSEYMEKHSTSGGQLTEKVRRKPYSVVLLDAIEKAHPDVFNILLQVLEDGRLTDSKGRTVDFRNTILIMTSNVGASEKDKVMGELKRAFRPEFINRIDEIIVFHSLEKKHLTEIVSLMSDQLTKRLKEQDLSIELTDAAKAKVAEEGVDLEYGARPLRRAIQKHVEDRLSEELLRGNIHKGQHIVLDVEDGEFVVKTTAKTN

Source Source

Source organism organism	Bacillus subtilis
NCBI taxonomy ID ncbi_taxonomy_id	1423
Host organism host_organism	Escherichia coli

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Unit-cell length a length_a	141.806 Å
Unit-cell length b length_b	141.806 Å
Unit-cell length c length_c	656.078 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	36

Space group space_group	P 65 2 2
Space-group number int_tables_number	179
Crystal system crystal_system	—

Resolution resolution	6.926 Å
Low-resolution limit resolution_low	49.153 Å
R factor r_factor	0.4081
R_work r_work	0.4074
R_free r_free	0.4219

Structure of MecA108:ClpC

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

Adapter protein mecA 1

State in the Current Structure

Other States of the Same Protein in the Database

Negative regulator of genetic competence ClpC/MecB

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

3pxi__assembly_1__model_1

3pxi__assembly_1__model_1 | I(q)

3pxi__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

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)

Structure of MecA108:ClpC

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

Adapter protein mecA 1

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Negative regulator of genetic competence ClpC/MecB

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

3pxi__assembly_1__model_1

3pxi__assembly_1__model_1 | I(q)

3pxi__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

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)