8qfx

Human Angiotensin-1 converting enzyme N-domain in complex with the lactotripeptide IPP

Method: X-RAY DIFFRACTION

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

Angiotensin-converting enzyme, soluble form

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Other combination	Heteromer	Protein 2 其他Polymer 2	ILE-PRO-PRO × 1 alpha-L-fucopyranose-(1-6)-2-acetamido-2-deoxy-beta-D-glucopyranose × 2 ZINC ION × 1 CHLORIDE ION × 1 MAGNESIUM ION × 1 TRIETHYLENE GLYCOL × 2 DODECAETHYLENE GLYCOL × 1 3,6,9,12,15,18,21,24,27-NONAOXANONACOSANE-1,29-DIOL × 1 DI(HYDROXYETHYL)ETHER × 4 1,2-ETHANEDIOL × 5 2-acetamido-2-deoxy-beta-D-glucopyranose × 4 beta-D-mannopyranose × 1 water × 2	Consistent with protein count
2	Other combination	Heteromer	Protein 2 其他Polymer 2	ILE-PRO-PRO × 1 alpha-L-fucopyranose-(1-6)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 ZINC ION × 1 CHLORIDE ION × 1 MAGNESIUM ION × 1 TRIETHYLENE GLYCOL × 1 DI(HYDROXYETHYL)ETHER × 4 1,2-ETHANEDIOL × 4 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 beta-D-mannopyranose × 1 ACETATE ION × 1 alpha-L-fucopyranose × 1 water × 2	Consistent with protein count
3	Other combination	Heteromer	Protein 2 其他Polymer 2	ILE-PRO-PRO × 1 alpha-L-fucopyranose-(1-6)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose × 1 ZINC ION × 1 CHLORIDE ION × 1 MAGNESIUM ION × 1 TRIETHYLENE GLYCOL × 1 DI(HYDROXYETHYL)ETHER × 1 1,2-ETHANEDIOL × 5 2-acetamido-2-deoxy-beta-D-glucopyranose × 3 beta-D-mannopyranose × 1 ACETATE ION × 1 TETRAETHYLENE GLYCOL × 1 PENTAETHYLENE GLYCOL × 1 water × 2	Consistent with protein count
4	Other combination	Heteromer	Protein 2 其他Polymer 1	ILE-PRO-PRO × 1 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 ZINC ION × 1 CHLORIDE ION × 1 MAGNESIUM ION × 1 TRIETHYLENE GLYCOL × 1 3,6,9,12,15,18,21,24,27-NONAOXANONACOSANE-1,29-DIOL × 1 DI(HYDROXYETHYL)ETHER × 2 1,2-ETHANEDIOL × 4 2-acetamido-2-deoxy-beta-D-glucopyranose × 4 beta-D-mannopyranose × 1 ACETATE ION × 1 alpha-L-fucopyranose × 1 TETRAETHYLENE GLYCOL × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ACE_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–628； UniProt 30–657 Author chain B； PDBConstruct 1–628； UniProt 30–657 Author chain C； PDBConstruct 1–628； UniProt 30–657 Author chain D； PDBConstruct 1–628； UniProt 30–657

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	8qfx
Deposition date deposition_date	2023-09-05
Structure title title	Human Angiotensin-1 converting enzyme N-domain in complex with the lactotripeptide IPP
Keywords keywords	inhibitor, complex, angiotensin I coverting enzyme, metalloprotease, lactotripeptide, 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.

8qfx__assembly_1__model_1

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

Download this curve (.dat)

8qfx__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

8qfx__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	26.11 Å
Rg (electron density)	24.90 Å
Total Rg	25.89 Å
Atom count	5251
Residues	612
Excluded volume	93346 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`8qfx__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`8qfx__assembly_2__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`8qfx__assembly_3__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`8qfx__assembly_4__model_1`	dimeric （2）	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 (20)

Entity 1 Entity 1 polymer

Description description	Angiotensin-converting enzyme, soluble form
Molecular weight formula_weight	72493.4 kDa
Source method src_method	man
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	23659

LDPGLQPGQFSADEAGAQLFAQSYQSSAEQVLFQSVAASWAHDTNITAENARRQEEAALLSQEFAEAWGQKAKELYEPIWQQFTDPQLRRIIGAVRTLGSANLPLAKRQQYNALLSQMSRIYSTAKVCLPQKTATCWSLDPDLTNILASSRSYAMLLFAWEGWHNAAGIPLKPLYEDFTALSNEAYKQDGFTDTGAYWRSWYNSPTFEDDLEHLYQQLEPLYLNLHAFVRRALHRRYGDRYINLRGPIPAHLLGDMWAQSWENIYDMVVPFPDKPNLDVTSTMLQQGWQATHMFRVAEEFFTSLELSPMPPEFWEGSMLEKPADGREVVCHASAWDFYNRKDFRIKQCTRVTMDQLSTVHHEMGHIQYYLQYKDLPVSLRRGANPGFHEAIGDVLALSVSTPEHLHKIGLLDRVTNDTESDINYLLKMALEKIAFLPFGYLVDQWRWGVFSGRTPPSRYNFDWWYLRTKYQGICPPVTRNETHFDAGAKFHVPNVTPYIRYFVSFVLQFQFHEALCKEAGYEGPLHQCDIYRSTKAGAKLRKVLRAGSSRPWQEVLKDMVGLDALDAQPLLKYFQLVTQWLQEQNQQNGEVLGWPEYQWHPPLPDNYPEGIDLVTDEAEASKFVEEYD

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Cricetulus griseus

Entity 2 Entity 2 polymer

Description description	ILE-PRO-PRO
Molecular weight formula_weight	325.4 kDa
Source method src_method	syn
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	E,F,G,H

IPP

Entity 3 Entity 3 branched

Description description	alpha-L-fucopyranose-(1-6)-2-acetamido-2-deoxy-beta-D-glucopyranose
Molecular weight formula_weight	367.3 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 4 Entity 4 branched

Description description	2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose
Molecular weight formula_weight	570.5 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 5 Entity 5 branched

Description description	2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
Molecular weight formula_weight	424.4 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 6 Entity 6 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 7 Entity 7 non-polymer

Description description	CHLORIDE ION
Molecular weight formula_weight	35.5 kDa
Source method src_method	nat
Copy count entity_count	4

Entity 8 Entity 8 non-polymer

Description description	MAGNESIUM ION
Molecular weight formula_weight	24.3 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 9 Entity 9 non-polymer

Description description	TRIETHYLENE GLYCOL
Molecular weight formula_weight	150.2 kDa
Source method src_method	syn
Copy count entity_count	5

Entity 10 Entity 10 non-polymer

Description description	DODECAETHYLENE GLYCOL
Molecular weight formula_weight	546.6 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 11 Entity 11 non-polymer

Description description	3,6,9,12,15,18,21,24,27-NONAOXANONACOSANE-1,29-DIOL
Molecular weight formula_weight	458.5 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 12 Entity 12 non-polymer

Description description	DI(HYDROXYETHYL)ETHER
Molecular weight formula_weight	106.1 kDa
Source method src_method	nat
Copy count entity_count	11

Entity 13 Entity 13 non-polymer

Description description	1,2-ETHANEDIOL
Molecular weight formula_weight	62.1 kDa
Source method src_method	syn
Copy count entity_count	18

Entity 14 Entity 14 non-polymer

Description description	2-acetamido-2-deoxy-beta-D-glucopyranose
Molecular weight formula_weight	221.2 kDa
Source method src_method	syn
Copy count entity_count	13

Entity 15 Entity 15 non-polymer

Description description	beta-D-mannopyranose
Molecular weight formula_weight	180.2 kDa
Source method src_method	nat
Copy count entity_count	4

Entity 16 Entity 16 non-polymer

Description description	ACETATE ION
Molecular weight formula_weight	59.0 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 17 Entity 17 non-polymer

Description description	alpha-L-fucopyranose
Molecular weight formula_weight	164.2 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 18 Entity 18 non-polymer

Description description	TETRAETHYLENE GLYCOL
Molecular weight formula_weight	194.2 kDa
Source method src_method	nat
Copy count entity_count	2

Entity 19 Entity 19 non-polymer

Description description	PENTAETHYLENE GLYCOL
Molecular weight formula_weight	238.3 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 20 Entity 20 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	2325

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Unit-cell length a length_a	74.229 Å
Unit-cell length b length_b	103.395 Å
Unit-cell length c length_c	115.416 Å
Unit-cell angle α angle_alpha	84.95 °
Unit-cell angle β angle_beta	85.49 °
Unit-cell angle γ angle_gamma	81.55 °
Molecules per unit cell Z z_pdb	4

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

Resolution resolution	1.600 Å
Low-resolution limit resolution_low	79.452 Å
R factor r_factor	—
R_work r_work	0.1808
R_free r_free	0.2109

Human Angiotensin-1 converting enzyme N-domain in complex with the lactotripeptide IPP

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

Angiotensin-converting enzyme, soluble form

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

8qfx__assembly_1__model_1

8qfx__assembly_1__model_1 | I(q)

8qfx__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 (20)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 branched

Entity 4 Entity 4 branched

Entity 5 Entity 5 branched

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 non-polymer

Entity 8 Entity 8 non-polymer

Entity 9 Entity 9 non-polymer

Entity 10 Entity 10 non-polymer

Entity 11 Entity 11 non-polymer

Entity 12 Entity 12 non-polymer

Entity 13 Entity 13 non-polymer

Entity 14 Entity 14 non-polymer

Entity 15 Entity 15 non-polymer

Entity 16 Entity 16 non-polymer

Entity 17 Entity 17 non-polymer

Entity 18 Entity 18 non-polymer

Entity 19 Entity 19 non-polymer

Entity 20 Entity 20 water

7. Citations (1)

Human Angiotensin-1 converting enzyme N-domain in complex with the lactotripeptide IPP

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

Angiotensin-converting enzyme, soluble form

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

8qfx__assembly_1__model_1

8qfx__assembly_1__model_1 | I(q)

8qfx__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 (20)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 branched

Entity 4 Entity 4 branched

Entity 5 Entity 5 branched

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 non-polymer

Entity 8 Entity 8 non-polymer

Entity 9 Entity 9 non-polymer

Entity 10 Entity 10 non-polymer

Entity 11 Entity 11 non-polymer

Entity 12 Entity 12 non-polymer

Entity 13 Entity 13 non-polymer

Entity 14 Entity 14 non-polymer

Entity 15 Entity 15 non-polymer

Entity 16 Entity 16 non-polymer

Entity 17 Entity 17 non-polymer

Entity 18 Entity 18 non-polymer

Entity 19 Entity 19 non-polymer

Entity 20 Entity 20 water

7. Citations (1)