SAXSdb — 2ags

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

sialidase

Trypanosoma rangeli

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	SULFATE ION × 2 3-deoxy-3-fluoro-D-erythro-alpha-L-manno-non-2-ulopyranosonic acid × 1 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	O44049_TRYRA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 15–652； UniProt 23–660

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	2ags
Deposition date deposition_date	2005-07-27
Structure title title	Trypanosoma rangeli Sialidase in Complex with 2-Keto-3-deoxy-D-glycero-D-galacto-2,3-difluoro-nononic acid (2,3-difluoro-KDN)
Keywords keywords	beta-propeller, covalent enzyme-intermediate complex, beta-sandwich, HYDROLASE; HYDROLASE
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.

2ags__assembly_1__model_1

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

Download this curve (.dat)

2ags__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2ags__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	27.84 Å
Rg (electron density)	27.12 Å
Total Rg	27.84 Å
Atom count	4909
Residues	634
Excluded volume	86787 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2ags__assembly_1__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 (4)

Entity 1 Entity 1 polymer

Description description	sialidase
Molecular weight formula_weight	71205.2 kDa
EC 编号 ec_number	3.2.1.18
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	5767

MGGSHHHHHHGMASLAPGSSRVELFKRKNSTVPFEESNGTIRERVVHSFRIPTIVNVDGVMVAIADARYETSFDNSFIETAVKYSVDDGATWNTQIAIKNSRASSVSRVMDATVIVKGNKLYILVGSFNKTRNSWTQHRDGSDWEPLLVVGEVTKSAANGKTTATISWGKPVSLKPLFPAEFDGILTKEFIGGVGAAIVASNGNLVYPVQIADMGGRVFTKIMYSEDDGNTWKFAEGRSKFGCSEPAVLEWEGKLIINNRVDGNRRLVYESSDMGKTWVEALGTLSHVWTNSPTSNQQDCQSSFVAVTIEGKRVMLFTHPLNLKGRWMRDRLHLWMTDNQRIFDVGQISIGDENSGYSSVLYKDDKLYSLHEINTNDVYSLVFVRLIGELQLMKSVVRTWKEEDNHLASICTPVVPATPPSKGGCGAAVPTAGLVGFLSHSANGSVWEDVYRCVDANVANAERVPNGLKFNGVGGGAVWPVARQGQTRRYQFANYRFTLVATVTIDELPKGTSPLLGAGLEGPGDAKLLGLSYDKNRQWRPLYGAAPASPTGSWELHKKYHVVLTMADRQGSVYVDGQPLAGSGNTVVRGATLPDISHFYIGGPRSKGAPTDSRVTVTNVVLYNRRLNSSEIRTLFLSQDMIGTDGGAGTAA

Source Source

Source organism organism	Trypanosoma rangeli
NCBI taxonomy ID ncbi_taxonomy_id	5698
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 non-polymer

Description description	3-deoxy-3-fluoro-D-erythro-alpha-L-manno-non-2-ulopyranosonic acid
Molecular weight formula_weight	286.2 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	805

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6. Fold Classification (SCOP + CATH) 5 domains

SCOP 2.08 (3 domains)

Domain ID domain_id	d2agsa1
Class class	b — All beta proteins
Fold Fold fold	b.29 — Concanavalin A-like lectins/glucanases
Superfamily Superfamily superfamily	b.29.1 — Concanavalin A-like lectins/glucanases
Family Family family	b.29.1.0 — automated matches

Domain ID domain_id	d2agsa2
Class class	b — All beta proteins
Fold Fold fold	b.68 — 6-bladed beta-propeller
Superfamily Superfamily superfamily	b.68.1 — Sialidases
Family Family family	b.68.1.1 — Sialidases (neuraminidases)

Domain ID domain_id	d2agsa3
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

CATH v4.4 (2 domains)

Domain ID domain_id	2agsA01
Class class	2 — Mainly Beta
Architecture architecture	120 — 6 Propeller
Topology topology	10 — Neuraminidase
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	2agsA02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	200 —

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Unit-cell length a length_a	73.672 Å
Unit-cell length b length_b	95.569 Å
Unit-cell length c length_c	105.816 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	1.700 Å
Low-resolution limit resolution_low	35.000 Å
R factor r_factor	0.1540
R_work r_work	0.1540
R_free r_free	0.1890

Trypanosoma rangeli Sialidase in Complex with 2-Keto-3-deoxy-D-glycero-D-galacto-2,3-difluoro-nononic acid (2,3-difluoro-KDN)

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

sialidase

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

2ags__assembly_1__model_1

2ags__assembly_1__model_1 | I(q)

2ags__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 5 domains

SCOP 2.08 (3 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Trypanosoma rangeli Sialidase in Complex with 2-Keto-3-deoxy-D-glycero-D-galacto-2,3-difluoro-nononic acid (2,3-difluoro-KDN)

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

sialidase

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

2ags__assembly_1__model_1

2ags__assembly_1__model_1 | I(q)

2ags__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 5 domains

SCOP 2.08 (3 domains)

CATH v4.4 (2 domains)

7. Citations (1)