2vot

Structural and biochemical evidence for a boat-like transition state in beta-mannosidases

Method: X-RAY DIFFRACTION

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

BETA-MANNOSIDASE

BACTEROIDES THETAIOTAOMICRON

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	(5R,6R,7S,8R)-6,7,8-trihydroxy-5-(hydroxymethyl)-2-[(phenylamino)methyl]-5,6,7,8-tetrahydro-1H-imidazo[1,2-a]pyridin-4-ium × 1 1,2-ETHANEDIOL × 25 BROMIDE ION × 5 water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	(5R,6R,7S,8R)-6,7,8-trihydroxy-5-(hydroxymethyl)-2-[(phenylamino)methyl]-5,6,7,8-tetrahydro-1H-imidazo[1,2-a]pyridin-4-ium × 1 1,2-ETHANEDIOL × 27 BROMIDE ION × 3 CHLORIDE ION × 5 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q8AAK6_BACTN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–839； UniProt 26–864 Author chain B； PDBConstruct 1–839； UniProt 26–864

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	2vot
Deposition date deposition_date	2008-02-20
Structure title title	Structural and biochemical evidence for a boat-like transition state in beta-mannosidases
Keywords keywords	LINEAR FREE ENERGY RELATIONSHIP, HYDROLASE, TRANSITION STATE MIMIC, MANNOSIDASE, GLYCOSIDE 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.

2vot__assembly_1__model_1

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

Download this curve (.dat)

2vot__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2vot__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	29.37 Å
Rg (electron density)	28.55 Å
Total Rg	29.45 Å
Atom count	6885
Residues	837
Excluded volume	122410 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2vot__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2vot__assembly_2__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 (6)

Entity 1 Entity 1 polymer

Description description	BETA-MANNOSIDASE
Molecular weight formula_weight	97989.7 kDa
EC 编号 ec_number	3.2.1.25
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	15345

QGNDTSEVMLLDTGWEFSQSGTEKWMPATVPGTVHQDLISHELLPNPFYGMNEKKIQWVENEDWEYRTSFIVSEEQLNRDGIQLIFEGLDTYADVYLNGSLLLKADNMFVGYTLPVKSVLRKGENHLYIYFHSPIRQTLPQYASNGFNYPADNDHHEKHLSVFSRKAPYSYGWDWGIRMVTSGVWRPVTLRFYDIATISDYYVRQLSLTDENARLSNELIVNQIVPQKIPAEVRVNVSLNGTTVTEVKQQVTLQPGINHITLPAEVTNPVRWMPNGWGTPTLYDFSAQIACGDRIVAEQSHRIGLRTIRVVNEKDKDGESFYFEVNGIPMFAKGANYIPQDALLPNVTTERYQTLFRDMKEANMNMVRIWGGGTYENNLFYDLADENGILVWQDFMFACTPYPSDPTFLKRVEAEAVYNIRRLRNHASLAMWCGNNEILEALKYWGFEKKFTPEVYQGLMHGYDKLFRELLPSTVKEFDSDRFYVHSSPYLANWGRPESWGTGDSHNWGVWYGKKPFESLDTDLPRFMSEFGFQSFPEMKTIAAFAAPEDYQIESEVMNAHQKSSIGNSLIRTYMERDYIIPESFEDFVYVGLVLQGQGMRHGLEAHRRNRPYCMGTLYWQLNDSWPVVSWSSIDYYGNWKALHYQAKRAFAPVLINPIQQNDSLSVYLISDRLDTMEQMTLEMKVVDFDGKTLGKKIQVHSLEVPANTSKCVYRAKLDGWLTPEDCRRSFLKLILKDKSGHQVAESVHFFRKTKDLQLPPTSVSYQMKQTDGKCELTLFSSMLAKDIFIETPLQGARYSDNFFDLLPGERKKVIITSPRIKKGEELPVNIKHIRETYKEHHHHHH

Source Source

Source organism organism	BACTEROIDES THETAIOTAOMICRON
NCBI taxonomy ID ncbi_taxonomy_id	226186
Host organism host_organism	ESCHERICHIA COLI

Entity 2 Entity 2 non-polymer

Description description	(5R,6R,7S,8R)-6,7,8-trihydroxy-5-(hydroxymethyl)-2-[(phenylamino)methyl]-5,6,7,8-tetrahydro-1H-imidazo[1,2-a]pyridin-4-ium
Molecular weight formula_weight	306.3 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 non-polymer

Description description	1,2-ETHANEDIOL
Molecular weight formula_weight	62.1 kDa
Source method src_method	syn
Copy count entity_count	52

Entity 4 Entity 4 non-polymer

Description description	BROMIDE ION
Molecular weight formula_weight	79.9 kDa
Source method src_method	syn
Copy count entity_count	8

Entity 5 Entity 5 non-polymer

Description description	CHLORIDE ION
Molecular weight formula_weight	35.5 kDa
Source method src_method	syn
Copy count entity_count	5

Entity 6 Entity 6 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	1149

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6. Fold Classification (SCOP + CATH) 21 domains

SCOP 2.08 (11 domains)

Domain ID domain_id	d2vota1
Class class	b — All beta proteins
Fold Fold fold	b.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamily	b.1.4 — beta-Galactosidase/glucuronidase domain
Family Family family	b.1.4.0 — automated matches

Domain ID domain_id	d2vota2
Class class	b — All beta proteins
Fold Fold fold	b.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamily	b.1.4 — beta-Galactosidase/glucuronidase domain
Family Family family	b.1.4.0 — automated matches

Domain ID domain_id	d2vota3
Class class	b — All beta proteins
Fold Fold fold	b.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamily	b.1.4 — beta-Galactosidase/glucuronidase domain
Family Family family	b.1.4.0 — automated matches

Domain ID domain_id	d2vota4
Class class	b — All beta proteins
Fold Fold fold	b.18 — Galactose-binding domain-like
Superfamily Superfamily superfamily	b.18.1 — Galactose-binding domain-like
Family Family family	b.18.1.0 — automated matches

Domain ID domain_id	d2vota5
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.8 — (Trans)glycosidases
Family Family family	c.1.8.3 — beta-glycanases

Domain ID domain_id	d2votb1
Class class	b — All beta proteins
Fold Fold fold	b.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamily	b.1.4 — beta-Galactosidase/glucuronidase domain
Family Family family	b.1.4.0 — automated matches

Domain ID domain_id	d2votb2
Class class	b — All beta proteins
Fold Fold fold	b.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamily	b.1.4 — beta-Galactosidase/glucuronidase domain
Family Family family	b.1.4.0 — automated matches

Domain ID domain_id	d2votb3
Class class	b — All beta proteins
Fold Fold fold	b.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamily	b.1.4 — beta-Galactosidase/glucuronidase domain
Family Family family	b.1.4.0 — automated matches

Domain ID domain_id	d2votb4
Class class	b — All beta proteins
Fold Fold fold	b.18 — Galactose-binding domain-like
Superfamily Superfamily superfamily	b.18.1 — Galactose-binding domain-like
Family Family family	b.18.1.0 — automated matches

Domain ID domain_id	d2votb5
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.8 — (Trans)glycosidases
Family Family family	c.1.8.3 — beta-glycanases

Domain ID domain_id	d2votb6
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 (10 domains)

Domain ID domain_id	2votA01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	260 — Galactose-binding domain-like

Domain ID domain_id	2votA02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	10 — Immunoglobulins

Domain ID domain_id	2votA03
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	80 — Glycosidases

Domain ID domain_id	2votA04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	10 — Immunoglobulins

Domain ID domain_id	2votA05
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	10 — Immunoglobulins

Domain ID domain_id	2votB01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	260 — Galactose-binding domain-like

Domain ID domain_id	2votB02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	10 — Immunoglobulins

Domain ID domain_id	2votB03
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	80 — Glycosidases

Domain ID domain_id	2votB04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	10 — Immunoglobulins

Domain ID domain_id	2votB05
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	10 — Immunoglobulins

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Unit-cell length a length_a	91.315 Å
Unit-cell length b length_b	115.289 Å
Unit-cell length c length_c	99.400 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	113.14 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

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

Resolution resolution	1.950 Å
Low-resolution limit resolution_low	20.030 Å
R factor r_factor	0.1680
R_work r_work	0.1660
R_free r_free	0.2210

Structural and biochemical evidence for a boat-like transition state in beta-mannosidases

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

BETA-MANNOSIDASE

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

2vot__assembly_1__model_1

2vot__assembly_1__model_1 | I(q)

2vot__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 (6)

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 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 21 domains

SCOP 2.08 (11 domains)

CATH v4.4 (10 domains)

7. Citations (1)

Structural and biochemical evidence for a boat-like transition state in beta-mannosidases

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

BETA-MANNOSIDASE

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

2vot__assembly_1__model_1

2vot__assembly_1__model_1 | I(q)

2vot__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 (6)

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 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 21 domains

SCOP 2.08 (11 domains)

CATH v4.4 (10 domains)

7. Citations (1)