1mgq

CRYSTAL STRUCTURE OF A HEPTAMERIC SM-LIKE PROTEIN FROM METHANOBACTERIUM THERMOAUTOTROPHICUM

Method: X-RAY DIFFRACTION

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

SM-LIKE PROTEIN

Methanothermobacter thermautotrophicus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 7	water × 7	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RUXX_METTH
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 4–83； UniProt 2–81 Author chain B； PDBConstruct 4–83； UniProt 2–81 Author chain C； PDBConstruct 4–83； UniProt 2–81 Author chain D； PDBConstruct 4–83； UniProt 2–81 Author chain E； PDBConstruct 4–83； UniProt 2–81 Author chain F； PDBConstruct 4–83； UniProt 2–81 Author chain G； PDBConstruct 4–83； UniProt 2–81

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	1mgq
Deposition date deposition_date	2002-08-16
Structure title title	CRYSTAL STRUCTURE OF A HEPTAMERIC SM-LIKE PROTEIN FROM METHANOBACTERIUM THERMOAUTOTROPHICUM
Keywords keywords	LSM, RNA-BINDING, ARCHEA, RNA BINDING PROTEIN; RNA BINDING PROTEIN
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.

1mgq__assembly_1__model_1

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

Download this curve (.dat)

1mgq__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1mgq__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	25.70 Å
Rg (electron density)	24.45 Å
Total Rg	25.29 Å
Atom count	4022
Residues	511
Excluded volume	71794 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1mgq__assembly_1__model_1`	heptameric （7）	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)

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6. Fold Classification (SCOP + CATH) 14 domains

SCOP 2.08 (7 domains)

Domain ID domain_id	d1mgqa_
Class class	b — All beta proteins
Fold Fold fold	b.38 — Sm-like fold
Superfamily Superfamily superfamily	b.38.1 — Sm-like ribonucleoproteins
Family Family family	b.38.1.1 — Sm motif of small nuclear ribonucleoproteins, SNRNP

Domain ID domain_id	d1mgqb_
Class class	b — All beta proteins
Fold Fold fold	b.38 — Sm-like fold
Superfamily Superfamily superfamily	b.38.1 — Sm-like ribonucleoproteins
Family Family family	b.38.1.1 — Sm motif of small nuclear ribonucleoproteins, SNRNP

Domain ID domain_id	d1mgqc_
Class class	b — All beta proteins
Fold Fold fold	b.38 — Sm-like fold
Superfamily Superfamily superfamily	b.38.1 — Sm-like ribonucleoproteins
Family Family family	b.38.1.1 — Sm motif of small nuclear ribonucleoproteins, SNRNP

Domain ID domain_id	d1mgqd_
Class class	b — All beta proteins
Fold Fold fold	b.38 — Sm-like fold
Superfamily Superfamily superfamily	b.38.1 — Sm-like ribonucleoproteins
Family Family family	b.38.1.1 — Sm motif of small nuclear ribonucleoproteins, SNRNP

Domain ID domain_id	d1mgqe_
Class class	b — All beta proteins
Fold Fold fold	b.38 — Sm-like fold
Superfamily Superfamily superfamily	b.38.1 — Sm-like ribonucleoproteins
Family Family family	b.38.1.1 — Sm motif of small nuclear ribonucleoproteins, SNRNP

Domain ID domain_id	d1mgqf_
Class class	b — All beta proteins
Fold Fold fold	b.38 — Sm-like fold
Superfamily Superfamily superfamily	b.38.1 — Sm-like ribonucleoproteins
Family Family family	b.38.1.1 — Sm motif of small nuclear ribonucleoproteins, SNRNP

Domain ID domain_id	d1mgqg_
Class class	b — All beta proteins
Fold Fold fold	b.38 — Sm-like fold
Superfamily Superfamily superfamily	b.38.1 — Sm-like ribonucleoproteins
Family Family family	b.38.1.1 — Sm motif of small nuclear ribonucleoproteins, SNRNP

CATH v4.4 (7 domains)

Domain ID domain_id	1mgqA00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1mgqB00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1mgqC00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1mgqD00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1mgqE00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1mgqF00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1mgqG00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

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Unit-cell length a length_a	40.591 Å
Unit-cell length b length_b	71.883 Å
Unit-cell length c length_c	95.095 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	94.02 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	14

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

Resolution resolution	1.700 Å
Low-resolution limit resolution_low	14.890 Å
R factor r_factor	0.2309
R_work r_work	0.2292
R_free r_free	0.2612

Description description	SM-LIKE PROTEIN
Molecular weight formula_weight	9184.4 kDa
Source method src_method	man
Copy count entity_count	7

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F,G
Atom count atom_count	4273

CRYSTAL STRUCTURE OF A HEPTAMERIC SM-LIKE PROTEIN FROM METHANOBACTERIUM THERMOAUTOTROPHICUM

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

SM-LIKE PROTEIN

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

1mgq__assembly_1__model_1

1mgq__assembly_1__model_1 | I(q)

1mgq__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 water

6. Fold Classification (SCOP + CATH) 14 domains

SCOP 2.08 (7 domains)

CATH v4.4 (7 domains)

7. Citations (2)

Source organism organism	Methanothermobacter thermautotrophicus
NCBI taxonomy ID ncbi_taxonomy_id	145262
Host organism host_organism	Escherichia coli BL21

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	251

CRYSTAL STRUCTURE OF A HEPTAMERIC SM-LIKE PROTEIN FROM METHANOBACTERIUM THERMOAUTOTROPHICUM

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

SM-LIKE PROTEIN

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

1mgq__assembly_1__model_1

1mgq__assembly_1__model_1 | I(q)

1mgq__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 water

6. Fold Classification (SCOP + CATH) 14 domains

SCOP 2.08 (7 domains)

CATH v4.4 (7 domains)

7. Citations (2)