2g3n

Crystal structure of the Sulfolobus solfataricus alpha-glucosidase MalA in complex with beta-octyl-glucopyranoside

Method: X-RAY DIFFRACTION

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

Alpha-glucosidase

Sulfolobus solfataricus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 6	octyl beta-D-glucopyranoside × 6 water × 6	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	AGLU_SULSO
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 5–693； UniProt 5–693 Author chain B； PDBConstruct 5–693； UniProt 5–693 Author chain C； PDBConstruct 5–693； UniProt 5–693 Author chain D； PDBConstruct 5–693； UniProt 5–693 Author chain E； PDBConstruct 5–693； UniProt 5–693 Author chain F； PDBConstruct 5–693； UniProt 5–693

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	2g3n
Deposition date deposition_date	2006-02-20
Structure title title	Crystal structure of the Sulfolobus solfataricus alpha-glucosidase MalA in complex with beta-octyl-glucopyranoside
Keywords keywords	;hydrolase, alpha-glucosidase, enzyme-carbohydrate complex, glycoside hydrolase family 31, multidomain protein, (beta/alpha)8 barrel, retaining mechanism ;; 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.

2g3n__assembly_1__model_1

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

Download this curve (.dat)

2g3n__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2g3n__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	51.29 Å
Rg (electron density)	50.88 Å
Total Rg	51.28 Å
Atom count	34140
Residues	4146
Excluded volume	614050 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2g3n__assembly_1__model_1`	hexameric （6）	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	Alpha-glucosidase
Molecular weight formula_weight	80580.2 kDa
EC 编号 ec_number	3.2.1.20
Source method src_method	man
Copy count entity_count	6

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F
Atom count atom_count	34797

MRILKIYENKGVYKVVIGEPFPPIEFPLEQKISSNKSLSELGLTIVQQGNKVIVEKSLDLKEHIIGLGEKAFELDRKRKRYVMYNVDAGAYKKYQDPLYVSIPLFISVKDGVATGYFFNSASKVIFDVGLEEYDKVIVTIPEDSVEFYVIEGPRIEDVLEKYTELTGKPFLPPMWAFGYMISRYSYYPQDKVVELVDIMQKEGFRVAGVFLDIHYMDSYKLFTWHPYRFPEPKKLIDELHKRNVKLITIVDHGIRVDQNYSPFLSGMGKFCEIESGELFVGKMWPGTTVYPDFFREDTREWWAGLISEWLSQGVDGIWLDMNEPTDFSRAIEIRDVLSSLPVQFRDDRLVTTFPDNVVHYLRGKRVKHEKVRNAYPLYEAMATFKGFRTSHRNEIFILSRAGYAGIQRYAFIWTGDNTPSWDDLKLQLQLVLGLSISGVPFVGCDIGGFQGRNFAEIDNSMDLLVKYYALALFFPFYRSHKATDGIDTEPVFLPDYYKEKVKEIVELRYKFLPYIYSLALEASEKGHPVIRPLFYEFQDDDDMYRIEDEYMVGKYLLYAPIVSKEESRLVTLPRGKWYNYWNGEIINGKSVVKSTHELPIYLREGSIIPLEGDELIVYGETSFKRYDNAEITSSSNEIKFSREIYVSKLTITSEKPVSKIIVDDSKEIQVEKTMQNTYVAKINQKIRGKINLE

Source Source

Source organism organism	Sulfolobus solfataricus
NCBI taxonomy ID ncbi_taxonomy_id	2287
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	octyl beta-D-glucopyranoside
Molecular weight formula_weight	292.4 kDa
Source method src_method	man
Copy count entity_count	6

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	615

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6. Fold Classification (SCOP + CATH) 54 domains

SCOP 2.08 (30 domains)

Domain ID domain_id	d2g3na1
Class class	b — All beta proteins
Fold Fold fold	b.30 — Supersandwich
Superfamily Superfamily superfamily	b.30.5 — Galactose mutarotase-like
Family Family family	b.30.5.11 — Glycosyl hydrolase family 31, N-terminal domain-like

Domain ID domain_id	d2g3na2
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.1.8.13 — Glycosyl hydrolase family 31 catalytic domain

Domain ID domain_id	d2g3na3
Class class	b — All beta proteins
Fold Fold fold	b.71 — Glycosyl hydrolase domain
Superfamily Superfamily superfamily	b.71.1 — Glycosyl hydrolase domain
Family Family family	b.71.1.4 — Glycosyl hydrolase family 31, domain 3

Domain ID domain_id	d2g3na4
Class class	b — All beta proteins
Fold Fold fold	b.150 — Glycolsyl hydrolase family 31 C-terminal domain-like
Superfamily Superfamily superfamily	b.150.1 — Glycolsyl hydrolase family 31 C-terminal domain
Family Family family	b.150.1.1 — Glycolsyl hydrolase family 31 C-terminal domain

Domain ID domain_id	d2g3na5
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

Domain ID domain_id	d2g3nb1
Class class	b — All beta proteins
Fold Fold fold	b.30 — Supersandwich
Superfamily Superfamily superfamily	b.30.5 — Galactose mutarotase-like
Family Family family	b.30.5.11 — Glycosyl hydrolase family 31, N-terminal domain-like

Domain ID domain_id	d2g3nb2
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.1.8.13 — Glycosyl hydrolase family 31 catalytic domain

Domain ID domain_id	d2g3nb3
Class class	b — All beta proteins
Fold Fold fold	b.71 — Glycosyl hydrolase domain
Superfamily Superfamily superfamily	b.71.1 — Glycosyl hydrolase domain
Family Family family	b.71.1.4 — Glycosyl hydrolase family 31, domain 3

Domain ID domain_id	d2g3nb4
Class class	b — All beta proteins
Fold Fold fold	b.150 — Glycolsyl hydrolase family 31 C-terminal domain-like
Superfamily Superfamily superfamily	b.150.1 — Glycolsyl hydrolase family 31 C-terminal domain
Family Family family	b.150.1.1 — Glycolsyl hydrolase family 31 C-terminal domain

Domain ID domain_id	d2g3nb5
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

Domain ID domain_id	d2g3nc1
Class class	b — All beta proteins
Fold Fold fold	b.30 — Supersandwich
Superfamily Superfamily superfamily	b.30.5 — Galactose mutarotase-like
Family Family family	b.30.5.11 — Glycosyl hydrolase family 31, N-terminal domain-like

Domain ID domain_id	d2g3nc2
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.1.8.13 — Glycosyl hydrolase family 31 catalytic domain

Domain ID domain_id	d2g3nc3
Class class	b — All beta proteins
Fold Fold fold	b.71 — Glycosyl hydrolase domain
Superfamily Superfamily superfamily	b.71.1 — Glycosyl hydrolase domain
Family Family family	b.71.1.4 — Glycosyl hydrolase family 31, domain 3

Domain ID domain_id	d2g3nc4
Class class	b — All beta proteins
Fold Fold fold	b.150 — Glycolsyl hydrolase family 31 C-terminal domain-like
Superfamily Superfamily superfamily	b.150.1 — Glycolsyl hydrolase family 31 C-terminal domain
Family Family family	b.150.1.1 — Glycolsyl hydrolase family 31 C-terminal domain

Domain ID domain_id	d2g3nc5
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

Domain ID domain_id	d2g3nd1
Class class	b — All beta proteins
Fold Fold fold	b.30 — Supersandwich
Superfamily Superfamily superfamily	b.30.5 — Galactose mutarotase-like
Family Family family	b.30.5.11 — Glycosyl hydrolase family 31, N-terminal domain-like

Domain ID domain_id	d2g3nd2
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.1.8.13 — Glycosyl hydrolase family 31 catalytic domain

Domain ID domain_id	d2g3nd3
Class class	b — All beta proteins
Fold Fold fold	b.71 — Glycosyl hydrolase domain
Superfamily Superfamily superfamily	b.71.1 — Glycosyl hydrolase domain
Family Family family	b.71.1.4 — Glycosyl hydrolase family 31, domain 3

Domain ID domain_id	d2g3nd4
Class class	b — All beta proteins
Fold Fold fold	b.150 — Glycolsyl hydrolase family 31 C-terminal domain-like
Superfamily Superfamily superfamily	b.150.1 — Glycolsyl hydrolase family 31 C-terminal domain
Family Family family	b.150.1.1 — Glycolsyl hydrolase family 31 C-terminal domain

Domain ID domain_id	d2g3nd5
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

Domain ID domain_id	d2g3ne1
Class class	b — All beta proteins
Fold Fold fold	b.30 — Supersandwich
Superfamily Superfamily superfamily	b.30.5 — Galactose mutarotase-like
Family Family family	b.30.5.11 — Glycosyl hydrolase family 31, N-terminal domain-like

Domain ID domain_id	d2g3ne2
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.1.8.13 — Glycosyl hydrolase family 31 catalytic domain

Domain ID domain_id	d2g3ne3
Class class	b — All beta proteins
Fold Fold fold	b.71 — Glycosyl hydrolase domain
Superfamily Superfamily superfamily	b.71.1 — Glycosyl hydrolase domain
Family Family family	b.71.1.4 — Glycosyl hydrolase family 31, domain 3

Domain ID domain_id	d2g3ne4
Class class	b — All beta proteins
Fold Fold fold	b.150 — Glycolsyl hydrolase family 31 C-terminal domain-like
Superfamily Superfamily superfamily	b.150.1 — Glycolsyl hydrolase family 31 C-terminal domain
Family Family family	b.150.1.1 — Glycolsyl hydrolase family 31 C-terminal domain

Domain ID domain_id	d2g3ne5
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

Domain ID domain_id	d2g3nf1
Class class	b — All beta proteins
Fold Fold fold	b.30 — Supersandwich
Superfamily Superfamily superfamily	b.30.5 — Galactose mutarotase-like
Family Family family	b.30.5.11 — Glycosyl hydrolase family 31, N-terminal domain-like

Domain ID domain_id	d2g3nf2
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.1.8.13 — Glycosyl hydrolase family 31 catalytic domain

Domain ID domain_id	d2g3nf3
Class class	b — All beta proteins
Fold Fold fold	b.71 — Glycosyl hydrolase domain
Superfamily Superfamily superfamily	b.71.1 — Glycosyl hydrolase domain
Family Family family	b.71.1.4 — Glycosyl hydrolase family 31, domain 3

Domain ID domain_id	d2g3nf4
Class class	b — All beta proteins
Fold Fold fold	b.150 — Glycolsyl hydrolase family 31 C-terminal domain-like
Superfamily Superfamily superfamily	b.150.1 — Glycolsyl hydrolase family 31 C-terminal domain
Family Family family	b.150.1.1 — Glycolsyl hydrolase family 31 C-terminal domain

Domain ID domain_id	d2g3nf5
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 (24 domains)

Domain ID domain_id	2g3nA01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1760 — glycosyl hydrolase (family 31)

Domain ID domain_id	2g3nA02
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	2g3nA03
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1180 — Golgi alpha-mannosidase II

Domain ID domain_id	2g3nA04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1180 — Golgi alpha-mannosidase II

Domain ID domain_id	2g3nB01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1760 — glycosyl hydrolase (family 31)

Domain ID domain_id	2g3nB02
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	2g3nB03
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1180 — Golgi alpha-mannosidase II

Domain ID domain_id	2g3nB04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1180 — Golgi alpha-mannosidase II

Domain ID domain_id	2g3nC01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1760 — glycosyl hydrolase (family 31)

Domain ID domain_id	2g3nC02
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	2g3nC03
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1180 — Golgi alpha-mannosidase II

Domain ID domain_id	2g3nC04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1180 — Golgi alpha-mannosidase II

Domain ID domain_id	2g3nD01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1760 — glycosyl hydrolase (family 31)

Domain ID domain_id	2g3nD02
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	2g3nD03
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1180 — Golgi alpha-mannosidase II

Domain ID domain_id	2g3nD04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1180 — Golgi alpha-mannosidase II

Domain ID domain_id	2g3nE01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1760 — glycosyl hydrolase (family 31)

Domain ID domain_id	2g3nE02
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	2g3nE03
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1180 — Golgi alpha-mannosidase II

Domain ID domain_id	2g3nE04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1180 — Golgi alpha-mannosidase II

Domain ID domain_id	2g3nF01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1760 — glycosyl hydrolase (family 31)

Domain ID domain_id	2g3nF02
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	2g3nF03
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1180 — Golgi alpha-mannosidase II

Domain ID domain_id	2g3nF04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1180 — Golgi alpha-mannosidase II

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Unit-cell length a length_a	100.090 Å
Unit-cell length b length_b	174.430 Å
Unit-cell length c length_c	144.030 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	109.05 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	12

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

Resolution resolution	2.550 Å
Low-resolution limit resolution_low	24.160 Å
R factor r_factor	0.1910
R_work r_work	0.1910
R_free r_free	0.2130

Crystal structure of the Sulfolobus solfataricus alpha-glucosidase MalA in complex with beta-octyl-glucopyranoside

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

Alpha-glucosidase

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

2g3n__assembly_1__model_1

2g3n__assembly_1__model_1 | I(q)

2g3n__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 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 54 domains

SCOP 2.08 (30 domains)

CATH v4.4 (24 domains)

7. Citations (2)

Crystal structure of the Sulfolobus solfataricus alpha-glucosidase MalA in complex with beta-octyl-glucopyranoside

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

Alpha-glucosidase

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

2g3n__assembly_1__model_1

2g3n__assembly_1__model_1 | I(q)

2g3n__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 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 54 domains

SCOP 2.08 (30 domains)

CATH v4.4 (24 domains)

7. Citations (2)