1h64

CRYSTAL STRUCTURE OF THE SM-RELATED PROTEIN OF P. ABYSSI: THE BIOLOGICAL UNIT IS A HEPTAMER

Method: X-RAY DIFFRACTION

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

SNRNP SM-LIKE PROTEIN

PYROCOCCUS ABYSSI

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
2	Protein homooligomer	Homooligomer	Protein 7	water × 7	Consistent with protein count
3	Protein homooligomer	Homooligomer	Protein 7	water × 7	Consistent with protein count
4	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_PYRAB
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain 1； PDBConstruct 1–75； UniProt 1–75 Author chain 2； PDBConstruct 1–75； UniProt 1–75 Author chain A； PDBConstruct 1–75； UniProt 1–75 Author chain B； PDBConstruct 1–75； UniProt 1–75 Author chain C； PDBConstruct 1–75； UniProt 1–75 Author chain D； PDBConstruct 1–75； UniProt 1–75 Author chain E； PDBConstruct 1–75； UniProt 1–75 Author chain F； PDBConstruct 1–75； UniProt 1–75 Author chain G； PDBConstruct 1–75； UniProt 1–75 Author chain H； PDBConstruct 1–75； UniProt 1–75 Author chain I； PDBConstruct 1–75； UniProt 1–75 Author chain J； PDBConstruct 1–75； UniProt 1–75 Author chain K； PDBConstruct 1–75； UniProt 1–75 Author chain L； PDBConstruct 1–75； UniProt 1–75 Author chain M； PDBConstruct 1–75； UniProt 1–75 Author chain N； PDBConstruct 1–75； UniProt 1–75 Author chain O； PDBConstruct 1–75； UniProt 1–75 Author chain P； PDBConstruct 1–75； UniProt 1–75 Author chain Q； PDBConstruct 1–75； UniProt 1–75 Author chain R； PDBConstruct 1–75； UniProt 1–75 Author chain S； PDBConstruct 1–75； UniProt 1–75 Author chain T； PDBConstruct 1–75； UniProt 1–75 Author chain U； PDBConstruct 1–75； UniProt 1–75 Author chain V； PDBConstruct 1–75； UniProt 1–75 Author chain W； PDBConstruct 1–75； UniProt 1–75 Author chain X； PDBConstruct 1–75； UniProt 1–75 Author chain Y； PDBConstruct 1–75； UniProt 1–75 Author chain Z； PDBConstruct 1–75； UniProt 1–75

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	1h64
Deposition date deposition_date	2001-06-05
Structure title title	CRYSTAL STRUCTURE OF THE SM-RELATED PROTEIN OF P. ABYSSI: THE BIOLOGICAL UNIT IS A HEPTAMER
Keywords keywords	SM-LIKE PROTEIN, SM FOLD, SPLICEOSOME, SNRNP CORE; SM-LIKE 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.

1h64__assembly_1__model_1

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

Download this curve (.dat)

1h64__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1h64__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	25.88 Å
Rg (electron density)	24.46 Å
Total Rg	25.31 Å
Atom count	3955
Residues	497
Excluded volume	71559 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1h64__assembly_1__model_1`	heptameric （7）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1h64__assembly_2__model_1`	heptameric （7）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1h64__assembly_3__model_1`	heptameric （7）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`1h64__assembly_4__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) 56 domains

SCOP 2.08 (28 domains)

Domain ID domain_id	d1h641_
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	d1h642_
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	d1h64a_
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	d1h64b_
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	d1h64c_
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	d1h64d_
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	d1h64e_
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	d1h64f_
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	d1h64g_
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	d1h64h_
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	d1h64i_
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	d1h64j_
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	d1h64k_
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	d1h64l_
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	d1h64m_
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	d1h64n_
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	d1h64o_
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	d1h64p_
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	d1h64q_
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	d1h64r_
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	d1h64s_
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	d1h64t_
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	d1h64u_
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	d1h64v_
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	d1h64w_
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	d1h64x_
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	d1h64y_
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	d1h64z_
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 (28 domains)

Domain ID domain_id	1h64100
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64200
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64A00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64B00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64C00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64D00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64E00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64F00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64G00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64H00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64I00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64J00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64K00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64L00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64M00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64N00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64O00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64P00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64Q00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64R00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64S00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64T00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64U00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64V00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64W00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64X00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64Y00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	100 —

Domain ID domain_id	1h64Z00
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	69.330 Å
Unit-cell length b length_b	70.160 Å
Unit-cell length c length_c	116.010 Å
Unit-cell angle α angle_alpha	90.21 °
Unit-cell angle β angle_beta	97.70 °
Unit-cell angle γ angle_gamma	107.48 °
Molecules per unit cell Z z_pdb	28

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

Resolution resolution	1.900 Å
Low-resolution limit resolution_low	30.000 Å
R factor r_factor	0.2370
R_work r_work	0.2370
R_free r_free	0.2810

Description description	SNRNP SM-LIKE PROTEIN
Molecular weight formula_weight	8501.9 kDa
Source method src_method	man
Copy count entity_count	28

Polymer type type	polypeptide(L)
Chain IDs strand_id	1,2,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z
Atom count atom_count	17161

CRYSTAL STRUCTURE OF THE SM-RELATED PROTEIN OF P. ABYSSI: THE BIOLOGICAL UNIT IS A HEPTAMER

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

SNRNP 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

1h64__assembly_1__model_1

1h64__assembly_1__model_1 | I(q)

1h64__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) 56 domains

SCOP 2.08 (28 domains)

CATH v4.4 (28 domains)

7. Citations (1)

Source organism organism	PYROCOCCUS ABYSSI
NCBI taxonomy ID ncbi_taxonomy_id	29292
Host organism host_organism	ESCHERICHIA COLI

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	1341

CRYSTAL STRUCTURE OF THE SM-RELATED PROTEIN OF P. ABYSSI: THE BIOLOGICAL UNIT IS A HEPTAMER

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

SNRNP 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

1h64__assembly_1__model_1

1h64__assembly_1__model_1 | I(q)

1h64__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) 56 domains

SCOP 2.08 (28 domains)

CATH v4.4 (28 domains)

7. Citations (1)