SAXSdb — 1smp

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

SERRATIA METALLO PROTEINASE

Serratia marcescens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 2	ERWINIA CHRYSANTHEMI INHIBITOR × 1 （P18958） ZINC ION × 1 CALCIUM ION × 7 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PRZN_SERMA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–471； UniProt 17–487

ERWINIA CHRYSANTHEMI INHIBITOR

Erwinia chrysanthemi

UniProt P18958

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 2	SERRATIA METALLO PROTEINASE × 1 （P23694） ZINC ION × 1 CALCIUM ION × 7 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	INH_ERWCH
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain I； PDBConstruct 1–101； UniProt 20–120

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	1smp
Deposition date deposition_date	1995-01-13
Structure title title	CRYSTAL STRUCTURE OF A COMPLEX BETWEEN SERRATIA MARCESCENS METALLO-PROTEASE AND AN INHIBITOR FROM ERWINIA CHRYSANTHEMI
Keywords keywords	COMPLEX (METALLOPROTEASE-INHIBITOR), COMPLEX (METALLOPROTEASE-INHIBITOR) complex; COMPLEX (METALLOPROTEASE/INHIBITOR)
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.

1smp__assembly_1__model_1

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

Download this curve (.dat)

1smp__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1smp__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	26.96 Å
Rg (electron density)	26.54 Å
Total Rg	27.13 Å
Atom count	4314
Residues	568
Excluded volume	75312 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1smp__assembly_1__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 (5)

Entity 1 Entity 1 polymer

Description description	SERRATIA METALLO PROTEINASE
Molecular weight formula_weight	50439.2 kDa
EC 编号 ec_number	3.4.24.40
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	4535

AATTGYDAVDDLLHYHERGNGIQINGKDSFSNEQAGLFITRENQTWNGYKVFGQPVKLTFSFPDYKFSSTNVAGDTGLSKFSAEQQQQAKLSLQSWADVANITFTEVAAGQKANITFGNYSQDRPGHYDYGTQAYAFLPNTIWQGQDLGGQTWYNVNQSNVKHPATEDYGRQTFTHEIGHALGLSHPGDYNAGEGNPTYNDVTYAEDTRQFSLMSYWSETNTGGDNGGHYAAAPLLDDIAAIQHLYGANLSTRTGDTVYGFNSNTGRDFLSTTSNSQKVIFAAWDAGGNDTFDFSGYTANQRINLNEKSFSDVGGLKGNVSIAAGVTIENAIGGSGNDVIVGNAANNVLKGGAGNDVLFGGGGADELWGGAGKDIFVFSAASDSAPGASDWIRDFQKGIDKIDLSFFNKEANSSDFIHFVDHFSGTAGEALLSYNASSNVTDLSVNIGGHQAPDFLVKIVGQVDVATDFIV

Source Source

Source organism organism	Serratia marcescens
NCBI taxonomy ID ncbi_taxonomy_id	615
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 polymer

Description description	ERWINIA CHRYSANTHEMI INHIBITOR
Molecular weight formula_weight	11020.4 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	I

SSLRLPSAAELSGQWVLSGAEQHCDIRLNTDVLDGTTWKLAGDTACLQKLLPEAPVGWRPTPDGLTLTQADGSAVAFFSRNRDRYEHKLVDGSVRTLKKKA

Source Source

Source organism organism	Erwinia chrysanthemi
NCBI taxonomy ID ncbi_taxonomy_id	556
Host organism host_organism	Escherichia coli

Entity 3 Entity 3 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 4 Entity 4 non-polymer

Description description	CALCIUM ION
Molecular weight formula_weight	40.1 kDa
Source method src_method	syn
Copy count entity_count	7

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	221

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

Domain ID domain_id	d1smpa1
Class class	b — All beta proteins
Fold Fold fold	b.80 — Single-stranded right-handed beta-helix
Superfamily Superfamily superfamily	b.80.7 — beta-Roll
Family Family family	b.80.7.1 — Serralysin-like metalloprotease, C-terminal domain

Domain ID domain_id	d1smpa2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.92 — Zincin-like
Superfamily Superfamily superfamily	d.92.1 — Metalloproteases ('zincins'), catalytic domain
Family Family family	d.92.1.6 — Serralysin-like metalloprotease, catalytic (N-terminal) domain

Domain ID domain_id	d1smpi_
Class class	b — All beta proteins
Fold Fold fold	b.61 — Streptavidin-like
Superfamily Superfamily superfamily	b.61.2 — beta-Barrel protease inhibitors
Family Family family	b.61.2.1 — Metalloprotease inhibitor

CATH v4.4 (3 domains)

Domain ID domain_id	1smpA01
Class class	2 — Mainly Beta
Architecture architecture	150 — 2 Solenoid
Topology topology	10 — Alkaline Protease, subunit P, domain 1
Homologous superfamily homologous superfamily	10 — Serralysin-like metalloprotease, C-terminal

Domain ID domain_id	1smpA02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	390 — Collagenase (Catalytic Domain)
Homologous superfamily homologous superfamily	10 — Collagenase (Catalytic Domain)

Domain ID domain_id	1smpI00
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	128 — Lipocalin
Homologous superfamily homologous superfamily	10 —

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Unit-cell length a length_a	108.830 Å
Unit-cell length b length_b	108.830 Å
Unit-cell length c length_c	87.950 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	4

Space group space_group	P 43
Space-group number int_tables_number	78
Crystal system crystal_system	—

Resolution resolution	2.300 Å
Low-resolution limit resolution_low	8.000 Å
R factor r_factor	0.1950
R_work r_work	0.1950
R_free r_free	0.2470

CRYSTAL STRUCTURE OF A COMPLEX BETWEEN SERRATIA MARCESCENS METALLO-PROTEASE AND AN INHIBITOR FROM ERWINIA CHRYSANTHEMI

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

SERRATIA METALLO PROTEINASE

State in the Current Structure

Other States of the Same Protein in the Database

ERWINIA CHRYSANTHEMI INHIBITOR

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

1smp__assembly_1__model_1

1smp__assembly_1__model_1 | I(q)

1smp__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (2)

CRYSTAL STRUCTURE OF A COMPLEX BETWEEN SERRATIA MARCESCENS METALLO-PROTEASE AND AN INHIBITOR FROM ERWINIA CHRYSANTHEMI

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

SERRATIA METALLO PROTEINASE

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

ERWINIA CHRYSANTHEMI INHIBITOR

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

1smp__assembly_1__model_1

1smp__assembly_1__model_1 | I(q)

1smp__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (2)