SAXSdb — 1xnk

▼

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

endoxylanase 11A

Chaetomium thermophilum

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Other combination	Monomer	Protein 1 其他Polymer 1	4-thio-beta-D-xylopyranose-(1-4)-4-thio-beta-D-xylopyranose-(1-4)-methyl 4-thio-alpha-D-xylopyranoside × 1 SULFATE ION × 1 water × 1	Consistent with protein count
2	Other combination	Monomer	Protein 1 其他Polymer 1	4-thio-beta-D-xylopyranose-(1-4)-4-thio-beta-D-xylopyranose-(1-4)-methyl 4-thio-alpha-D-xylopyranoside × 1 SULFATE ION × 2 water × 1	Consistent with protein count
3	Other combination	Homooligomer	Protein 4 其他Polymer 4	4-thio-beta-D-xylopyranose-(1-4)-4-thio-beta-D-xylopyranose-(1-4)-methyl 4-thio-alpha-D-xylopyranoside × 4 SULFATE ION × 6 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q8J1V6_9PEZI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–196； UniProt 27–222 Author chain B； PDBConstruct 1–196； UniProt 27–222

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.

▼

2. Structure Basics 2. Structure Basics

Entry ID entry_id	1xnk
Deposition date deposition_date	2004-10-05
Structure title title	Beta-1,4-xylanase from Chaetomium thermophilum complexed with methyl thioxylopentoside
Keywords keywords	xylanase, glycoside hydrolase, family 11, glycosidase, thioinhibitor, sulphur containing inhibitor, HYDROLASE; HYDROLASE
Experimental Method method	X-RAY DIFFRACTION

▼

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.

1xnk__assembly_3__model_1

Assembly 3 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

1xnk__assembly_3__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1xnk__assembly_3__model_1 | P(r) · Pending

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

Rg（Guinier）	29.36 Å
Rg (electron density)	28.63 Å
Total Rg	29.34 Å
Atom count	6120
Residues	760
Excluded volume	105910 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1xnk__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1xnk__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1xnk__assembly_3__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download

▶

4. Crystallography and Experiment 4. Crystallography & Experiment

▶

5. Entities and Polymers Entities & Polymers (4)

Entity 1 Entity 1 polymer

Description description	endoxylanase 11A
Molecular weight formula_weight	21494.1 kDa
EC 编号 ec_number	3.2.1.8
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	3531

QTLTSSATGTHNGYYYSFWTDGQGNIRFNLESGGQYSVTWSGNGNWVGGKGWNPGTDNRVINYTADYRPNGNSYLAVYGWTRNPLIEYYVVESFGTYDPSTGATRMGSVTTDGGTYNIYRTQRVNAPSIEGTKTFYQYWSVRTSKRTGGTVTMANHFNAWRQAGLQLGSHDYQIVATEGYYSSGSATVNVGGSTTG

Source Source

Source organism organism	Chaetomium thermophilum
NCBI taxonomy ID ncbi_taxonomy_id	209285
Host organism host_organism	Hypocrea jecorina

Entity 2 Entity 2 branched

Description description	4-thio-beta-D-xylopyranose-(1-4)-4-thio-beta-D-xylopyranose-(1-4)-methyl 4-thio-alpha-D-xylopyranoside
Molecular weight formula_weight	476.6 kDa
Source method src_method	man
Copy count entity_count	2

Entity 3 Entity 3 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	449

▼

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1xnka_
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.29.1.11 — Xylanase/endoglucanase 11/12

Domain ID domain_id	d1xnkb_
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.29.1.11 — Xylanase/endoglucanase 11/12

CATH v4.4 (2 domains)

Domain ID domain_id	1xnkA00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	180 — Glycoside hydrolase family 11/12, catalytic domain

Domain ID domain_id	1xnkB00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	180 — Glycoside hydrolase family 11/12, catalytic domain

▶

Unit-cell length a length_a	108.241 Å
Unit-cell length b length_b	57.593 Å
Unit-cell length c length_c	66.205 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	8

Space group space_group	P 21 21 2
Space-group number int_tables_number	18
Crystal system crystal_system	—

Resolution resolution	1.550 Å
Low-resolution limit resolution_low	99.000 Å
R factor r_factor	0.1974
R_work r_work	0.1974
R_free r_free	0.2236

Beta-1,4-xylanase from Chaetomium thermophilum complexed with methyl thioxylopentoside

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

endoxylanase 11A

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

1xnk__assembly_3__model_1

1xnk__assembly_3__model_1 | I(q)

1xnk__assembly_3__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 branched

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Beta-1,4-xylanase from Chaetomium thermophilum complexed with methyl thioxylopentoside

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

endoxylanase 11A

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

1xnk__assembly_3__model_1

1xnk__assembly_3__model_1 | I(q)

1xnk__assembly_3__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 branched

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)