SAXSdb — 2afw

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

Glutaminyl-peptide cyclotransferase

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	ZINC ION × 1 SULFATE ION × 1 N-[2-(1H-IMIDAZOL-4-YL)ETHYL]ACETAMIDE × 1 water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	ZINC ION × 1 SULFATE ION × 1 N-[2-(1H-IMIDAZOL-4-YL)ETHYL]ACETAMIDE × 1 water × 1	Consistent with protein count
3	Protein homooligomer	Homooligomer	Protein 6	ZINC ION × 6 SULFATE ION × 6 N-[2-(1H-IMIDAZOL-4-YL)ETHYL]ACETAMIDE × 6 water × 6	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	QPCT_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–329； UniProt 33–361 Author chain B； PDBConstruct 1–329； UniProt 33–361

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	2afw
Deposition date deposition_date	2005-07-26
Structure title title	Crystal structure of human glutaminyl cyclase in complex with N-acetylhistamine
Keywords keywords	alpha-beta protein, metalloprotein, TRANSFERASE; TRANSFERASE
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.

2afw__assembly_3__model_1

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

Download this curve (.dat)

2afw__assembly_3__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2afw__assembly_3__model_1 | P(r) · Pending

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

Rg（Guinier）	37.99 Å
Rg (electron density)	37.03 Å
Total Rg	37.65 Å
Atom count	15762
Residues	1938
Excluded volume	279150 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2afw__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2afw__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`2afw__assembly_3__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 (5)

Entity 1 Entity 1 polymer

Description description	Glutaminyl-peptide cyclotransferase
Molecular weight formula_weight	37557.4 kDa
EC 编号 ec_number	2.3.2.5
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	5845

ASAWPEEKNYHQPAILNSSALRQIAEGTSISEMWQNDLQPLLIERYPGSPGSYAARQHIMQRIQRLQADWVLEIDTFLSQTPYGYRSFSNIISTLNPTAKRHLVLACHYDSKYFSHWNNRVFVGATDSAVPCAMMLELARALDKKLLSLKTVSDSKPDLSLQLIFFDGEEAFLHWSPQDSLYGSRHLAAKMASTPHPPGARGTSQLHGMDLLVLLDLIGAPNPTFPNFFPNSARWFERLQAIEHELHELGLLKDHSLEGRYFQNYSYGGVIQDDHIPFLRRGVPVLHLIPSPFPEVWHTMDDNEENLDESTIDNLNKILQVFVLEYLHL

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
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	2

Entity 4 Entity 4 non-polymer

Description description	N-[2-(1H-IMIDAZOL-4-YL)ETHYL]ACETAMIDE
Molecular weight formula_weight	153.2 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	591

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d2afwa_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.56 — Phosphorylase/hydrolase-like
Superfamily Superfamily superfamily	c.56.5 — Zn-dependent exopeptidases
Family Family family	c.56.5.8 — Glutaminyl-peptide cyclotransferase-like

Domain ID domain_id	d2afwb_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.56 — Phosphorylase/hydrolase-like
Superfamily Superfamily superfamily	c.56.5 — Zn-dependent exopeptidases
Family Family family	c.56.5.8 — Glutaminyl-peptide cyclotransferase-like

CATH v4.4 (2 domains)

Domain ID domain_id	2afwA00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	630 — Aminopeptidase
Homologous superfamily homologous superfamily	10 — Zn peptidases

Domain ID domain_id	2afwB00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	630 — Aminopeptidase
Homologous superfamily homologous superfamily	10 — Zn peptidases

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Unit-cell length a length_a	119.132 Å
Unit-cell length b length_b	119.132 Å
Unit-cell length c length_c	332.826 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	36

Space group space_group	H 3 2
Space-group number int_tables_number	155
Crystal system crystal_system	—

Resolution resolution	1.560 Å
Low-resolution limit resolution_low	50.000 Å
R factor r_factor	0.1990
R_work r_work	0.1890
R_free r_free	0.2130

Crystal structure of human glutaminyl cyclase in complex with N-acetylhistamine

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

Glutaminyl-peptide cyclotransferase

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

2afw__assembly_3__model_1

2afw__assembly_3__model_1 | I(q)

2afw__assembly_3__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (5)

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 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Crystal structure of human glutaminyl cyclase in complex with N-acetylhistamine

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

Glutaminyl-peptide cyclotransferase

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

2afw__assembly_3__model_1

2afw__assembly_3__model_1 | I(q)

2afw__assembly_3__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (5)

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 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)