SAXSdb — 1q2l

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

Protease III

Escherichia coli str. K12 substr.

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 PLATINUM (II) ION × 6 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PTRA_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–939； UniProt 24–962

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	1q2l
Deposition date deposition_date	2003-07-25
Structure title title	Crystal Structure of pitrilysin
Keywords keywords	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.

1q2l__assembly_1__model_1

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

Download this curve (.dat)

1q2l__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1q2l__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	34.41 Å
Rg (electron density)	33.48 Å
Total Rg	34.24 Å
Atom count	7376
Residues	937
Excluded volume	131260 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1q2l__assembly_1__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 (4)

Entity 1 Entity 1 polymer

Description description	Protease III
Molecular weight formula_weight	105229.0 kDa
EC 编号 ec_number	3.4.24.55
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	8967

ETGWQPIQETIRKSDKDNRQYQAIRLDNGMVVLLVSDPQAVKSLSALVVPVGSLEDPEAYQGLAHYLEHMSLMGSKKYPQADSLAEYLKMHGGSHNASTAPYRTAFYLEVENDALPGAVDRLADAIAEPLLDKKYAERERNAVNAELTMARTRDGMRMAQVSAETINPAHPGSKFSGGNLETLSDKPGNPVQQALKDFHEKYYSANLMKAVIYSNKPLPELAKMAADTFGRVPNKESKKPEITVPVVTDAQKGIIIHYVPALPRKVLRVEFRIDNNSAKFRSKTDELITYLIGNRSPGTLSDWLQKQGLVEGISANSDPIVNGNSGVLAISASLTDKGLANRDQVVAAIFSYLNLLREKGIDKQYFDELANVLDIDFRYPSITRDMDYVEWLADTMIRVPVEHTLDAVNIADRYDAKAVKERLAMMTPQNARIWYISPKEPHNKTAYFVDAPYQVDKISAQTFADWQKKAADIALSLPELNPYIPDDFSLIKSEKKYDHPELIVDESNLRVVYAPSRYFASEPKADVSLILRNPKAMDSARNQVMFALNDYLAGLALDQLSNQASVGGISFSTNANNGLMVNANGYTQRLPQLFQALLEGYFSYTATEDQLEQAKSWYNQMMDSAEKGKAFEQAIMPAQMLSQVPYFSRDERRKILPSITLKEVLAYRDALKSGARPEFMVIGNMTEAQATTLARDVQKQLGADGSEWCRNKDVVVDKKQSVIFEKAGNSTDSALAAVFVPTGYDEYTSSAYSSLLGQIVQPWFYNQLRTEEQLGYAVFAFPMSVGRQWGMGFLLQSNDKQPSFLWERYKAFFPTAEAKLRAMKPDEFAQIQQAVITQMLQAPQTLGEEASKLSKDFDRGNMRFDSRDKIVAQIKLLTPQKLADFFHQAVVEPQGMAILSQISGSQNGKAEYVHPEGWKVWENVSALQQTMPLMSEKNE

Source Source

Source organism organism	Escherichia coli str. K12 substr.
NCBI taxonomy ID ncbi_taxonomy_id	316407
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	1

Entity 3 Entity 3 non-polymer

Description description	PLATINUM (II) ION
Molecular weight formula_weight	195.1 kDa
Source method src_method	syn
Copy count entity_count	6

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	1591

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d1q2la1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.185 — LuxS/MPP-like metallohydrolase
Superfamily Superfamily superfamily	d.185.1 — LuxS/MPP-like metallohydrolase
Family Family family	d.185.1.1 — MPP-like

Domain ID domain_id	d1q2la2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.185 — LuxS/MPP-like metallohydrolase
Superfamily Superfamily superfamily	d.185.1 — LuxS/MPP-like metallohydrolase
Family Family family	d.185.1.1 — MPP-like

Domain ID domain_id	d1q2la3
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.185 — LuxS/MPP-like metallohydrolase
Superfamily Superfamily superfamily	d.185.1 — LuxS/MPP-like metallohydrolase
Family Family family	d.185.1.1 — MPP-like

Domain ID domain_id	d1q2la4
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.185 — LuxS/MPP-like metallohydrolase
Superfamily Superfamily superfamily	d.185.1 — LuxS/MPP-like metallohydrolase
Family Family family	d.185.1.1 — MPP-like

CATH v4.4 (4 domains)

Domain ID domain_id	1q2lA01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	830 — Cytochrome Bc1 Complex; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Metalloenzyme, LuxS/M16 peptidase-like

Domain ID domain_id	1q2lA02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	830 — Cytochrome Bc1 Complex; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Metalloenzyme, LuxS/M16 peptidase-like

Domain ID domain_id	1q2lA03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	830 — Cytochrome Bc1 Complex; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Metalloenzyme, LuxS/M16 peptidase-like

Domain ID domain_id	1q2lA04
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	830 — Cytochrome Bc1 Complex; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Metalloenzyme, LuxS/M16 peptidase-like

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Unit-cell length a length_a	115.200 Å
Unit-cell length b length_b	115.200 Å
Unit-cell length c length_c	178.500 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	6

Space group space_group	P 32 2 1
Space-group number int_tables_number	154
Crystal system crystal_system	—

Resolution resolution	2.200 Å
Low-resolution limit resolution_low	12.000 Å
R factor r_factor	—
R_work r_work	0.2100
R_free r_free	0.2500

Crystal Structure of pitrilysin

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

Protease III

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

1q2l__assembly_1__model_1

1q2l__assembly_1__model_1 | I(q)

1q2l__assembly_1__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 (4)

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 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Crystal Structure of pitrilysin

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

Protease III

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

1q2l__assembly_1__model_1

1q2l__assembly_1__model_1 | I(q)

1q2l__assembly_1__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 (4)

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 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)