SAXSdb — 4c31

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

NUCLEAR MRNA EXPORT PROTEIN SAC3

SACCHAROMYCES CEREVISIAE

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 8	PROTEIN SUS1 × 2 （Q6WNK7） NUCLEOPORIN NUP1 × 4 （P20676）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SAC3_YEAST
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 3–33； UniProt 757–787 Author chain D； PDBConstruct 3–33； UniProt 757–787

PROTEIN SUS1

SACCHAROMYCES CEREVISIAE

UniProt Q6WNK7

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 8	NUCLEAR MRNA EXPORT PROTEIN SAC3 × 2 （P46674） NUCLEOPORIN NUP1 × 4 （P20676）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SUS1_YEAST
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–96； UniProt 1–96 Author chain E； PDBConstruct 1–96； UniProt 1–96

NUCLEOPORIN NUP1

SACCHAROMYCES CEREVISIAE

UniProt P20676

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 8	NUCLEAR MRNA EXPORT PROTEIN SAC3 × 2 （P46674） PROTEIN SUS1 × 2 （Q6WNK7）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	NUP1_YEAST
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain C； PDBConstruct 3–36； UniProt 322–355 Author chain F； PDBConstruct 3–36； UniProt 322–355 Author chain X； PDBConstruct 3–36； UniProt 322–355 Author chain Y； PDBConstruct 3–36； UniProt 322–355

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	4c31
Deposition date deposition_date	2013-08-21
Structure title title	Nup1:Sac3:Sus1 complex
Keywords keywords	TRANSPORT PROTEIN, NUCLEAR TRANSPORT, MRNA EXPORT, GENE EXPRESSION PATHWAY INTEGRATION, NUCLEAR PORE; TRANSPORT 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.

4c31__assembly_1__model_1

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

Download this curve (.dat)

4c31__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

4c31__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	21.49 Å
Rg (electron density)	20.10 Å
Total Rg	21.12 Å
Atom count	2340
Residues	286
Excluded volume	41996 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4c31__assembly_1__model_1`	octameric （8）	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 (3)

Entity 1 Entity 1 polymer

Description description	NUCLEAR MRNA EXPORT PROTEIN SAC3
Molecular weight formula_weight	4062.6 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,D
Atom count atom_count	2340

GSRKDFIDTMTRELYDAFLHERLYLIYMDSRAE

Source Source

Source organism organism	SACCHAROMYCES CEREVISIAE
Common name common_name	;BAKER'S YEAST ;
NCBI taxonomy ID ncbi_taxonomy_id	4932
Host organism host_organism	ESCHERICHIA COLI

Entity 2 Entity 2 polymer

Description description	PROTEIN SUS1
Molecular weight formula_weight	11094.5 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B,E

MTMDTAQLKSQIQQYLVESGNYELISNELKARLLQEGWVDKVKDLTKSEMNINESTNFTQILSTVEPKALEMVSDSTRETVLKQIREFLEEIVDTQ

Source Source

Source organism organism	SACCHAROMYCES CEREVISIAE
Common name common_name	;BAKER'S YEAST ;
NCBI taxonomy ID ncbi_taxonomy_id	4932
Host organism host_organism	ESCHERICHIA COLI

Entity 3 Entity 3 polymer

Description description	NUCLEOPORIN NUP1
Molecular weight formula_weight	3885.4 kDa
Source method src_method	man
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C,F,X,Y

GSPKKDKESIVLPTVGFDFIKDNETPSKKTSPKATS

Source Source

Source organism organism	SACCHAROMYCES CEREVISIAE
Common name common_name	;BAKER'S YEAST ;
NCBI taxonomy ID ncbi_taxonomy_id	4932
Host organism host_organism	ESCHERICHIA COLI

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d4c31b_
Class class	a — All alpha proteins
Fold Fold fold	a.301 — Sus1-like
Superfamily Superfamily superfamily	a.301.1 — Sus1-like
Family Family family	a.301.1.1 — Sus1-like

Domain ID domain_id	d4c31e_
Class class	a — All alpha proteins
Fold Fold fold	a.301 — Sus1-like
Superfamily Superfamily superfamily	a.301.1 — Sus1-like
Family Family family	a.301.1.1 — Sus1-like

CATH v4.4 (2 domains)

Domain ID domain_id	4c31B00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	246 — Serum Albumin; Chain A, Domain 1
Homologous superfamily homologous superfamily	140 — ENY2/SUS1

Domain ID domain_id	4c31E00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	246 — Serum Albumin; Chain A, Domain 1
Homologous superfamily homologous superfamily	140 — ENY2/SUS1

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Unit-cell length a length_a	95.550 Å
Unit-cell length b length_b	95.550 Å
Unit-cell length c length_c	105.660 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	24

Space group space_group	P 32 2 1
Space-group number int_tables_number	154
Crystal system crystal_system	—

Resolution resolution	3.000 Å
Low-resolution limit resolution_low	47.775 Å
R factor r_factor	0.2086
R_work r_work	0.2068
R_free r_free	0.2435

Nup1:Sac3:Sus1 complex

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

NUCLEAR MRNA EXPORT PROTEIN SAC3

State in the Current Structure

Other States of the Same Protein in the Database

PROTEIN SUS1

State in the Current Structure

Other States of the Same Protein in the Database

NUCLEOPORIN NUP1

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

4c31__assembly_1__model_1

4c31__assembly_1__model_1 | I(q)

4c31__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Nup1:Sac3:Sus1 complex

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

NUCLEAR MRNA EXPORT PROTEIN SAC3

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

PROTEIN SUS1

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

NUCLEOPORIN NUP1

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

4c31__assembly_1__model_1

4c31__assembly_1__model_1 | I(q)

4c31__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)