SAXSdb — 5z1p

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

Monellin chain B,Monellin chain A

Dioscoreophyllum cumminsii

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Insufficient information	Monomer	Protein 1	water × 1	Consistent with protein count
2	Insufficient information	Monomer	Protein 1	water × 1	Consistent with protein count
3	Insufficient information	Monomer	Protein 1	water × 1	Consistent with protein count
4	Insufficient information	Monomer	Protein 1	water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	MONA_DIOCU
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 53–97； UniProt 1–45 Author chain B； PDBConstruct 53–97； UniProt 1–45 Author chain C； PDBConstruct 53–97； UniProt 1–45 Author chain D； PDBConstruct 53–97； UniProt 1–45

Monellin chain B,Monellin chain A

Dioscoreophyllum cumminsii

UniProt P02882

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Insufficient information	Monomer	Protein 1	water × 1	Consistent with protein count
2	Insufficient information	Monomer	Protein 1	water × 1	Consistent with protein count
3	Insufficient information	Monomer	Protein 1	water × 1	Consistent with protein count
4	Insufficient information	Monomer	Protein 1	water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	MONB_DIOCU
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–49； UniProt 1–48 Author chain B； PDBConstruct 2–49； UniProt 1–48 Author chain C； PDBConstruct 2–49； UniProt 1–48 Author chain D； PDBConstruct 2–49； UniProt 1–48

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	5z1p
Deposition date deposition_date	2017-12-27
Structure title title	Structural basis of the improved sweetness and stability of the single-chain sweet-tasting protein monellin (MNEI)
Keywords keywords	monellin, PLANT PROTEIN; PLANT 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.

5z1p__assembly_1__model_1

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

Download this curve (.dat)

5z1p__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

5z1p__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	15.28 Å
Rg (electron density)	14.09 Å
Total Rg	15.25 Å
Atom count	789
Residues	95
Excluded volume	14115 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`5z1p__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`5z1p__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`5z1p__assembly_3__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`5z1p__assembly_4__model_1`	monomeric （1）	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) 4 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d5z1pa_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.17 — Cystatin-like
Superfamily Superfamily superfamily	d.17.1 — Cystatin/monellin
Family Family family	d.17.1.1 — Monellin

Domain ID domain_id	d5z1pb_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.17 — Cystatin-like
Superfamily Superfamily superfamily	d.17.1 — Cystatin/monellin
Family Family family	d.17.1.1 — Monellin

Domain ID domain_id	d5z1pc_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.17 — Cystatin-like
Superfamily Superfamily superfamily	d.17.1 — Cystatin/monellin
Family Family family	d.17.1.1 — Monellin

Domain ID domain_id	d5z1pd_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.17 — Cystatin-like
Superfamily Superfamily superfamily	d.17.1 — Cystatin/monellin
Family Family family	d.17.1.1 — Monellin

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Unit-cell length a length_a	35.603 Å
Unit-cell length b length_b	46.126 Å
Unit-cell length c length_c	70.176 Å
Unit-cell angle α angle_alpha	71.22 °
Unit-cell angle β angle_beta	79.00 °
Unit-cell angle γ angle_gamma	67.32 °
Molecules per unit cell Z z_pdb	4

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

Resolution resolution	1.890 Å
Low-resolution limit resolution_low	40.930 Å
R factor r_factor	0.2181
R_work r_work	0.2155
R_free r_free	0.2658

Description description	Monellin chain B,Monellin chain A
Molecular weight formula_weight	11346.0 kDa
Mutation mutation	E2N, E23A
Source method src_method	man
Copy count entity_count	4

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	3315

Structural basis of the improved sweetness and stability of the single-chain sweet-tasting protein monellin (MNEI)

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

Monellin chain B,Monellin chain A

State in the Current Structure

Other States of the Same Protein in the Database

Monellin chain B,Monellin chain A

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

5z1p__assembly_1__model_1

5z1p__assembly_1__model_1 | I(q)

5z1p__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) 4 domains

SCOP 2.08 (4 domains)

7. Citations (1)

Source organism organism	Dioscoreophyllum cumminsii
Common name common_name	Serendipity berry
NCBI taxonomy ID ncbi_taxonomy_id	3457
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	277

Structural basis of the improved sweetness and stability of the single-chain sweet-tasting protein monellin (MNEI)

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

Monellin chain B,Monellin chain A

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Monellin chain B,Monellin chain A

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

5z1p__assembly_1__model_1

5z1p__assembly_1__model_1 | I(q)

5z1p__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) 4 domains

SCOP 2.08 (4 domains)

7. Citations (1)