SAXSdb — 2b01

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

Phospholipase A2, major isoenzyme

Sus scrofa

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	CALCIUM ION × 3 CHLORIDE ION × 4 TAUROCHENODEOXYCHOLIC ACID × 1 water × 1	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	CALCIUM ION × 6 CHLORIDE ION × 8 TAUROCHENODEOXYCHOLIC ACID × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PA21B_PIG
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–124； UniProt 23–146

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	2b01
Deposition date deposition_date	2005-09-12
Structure title title	Crystal Structure of Porcine Pancreatic Phospholipase A2 in Complex with Taurochenodeoxycholate
Keywords keywords	Bile Salt, Taurochenodeoxycholate, Carboxylic ester hydrolase, PLA2, Pancreatic Enzyme, 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.

2b01__assembly_1__model_1

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

Download this curve (.dat)

2b01__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2b01__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	15.71 Å
Rg (electron density)	14.66 Å
Total Rg	15.77 Å
Atom count	1012
Residues	124
Excluded volume	17912 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2b01__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2b01__assembly_2__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	Phospholipase A2, major isoenzyme
Molecular weight formula_weight	14009.7 kDa
EC 编号 ec_number	3.1.1.4
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	1126

ALWQFRSMIKCAIPGSHPLMDFNNYGCYCGLGGSGTPVDELDRCCETHDNCYRDAKNLDSCKFLVDNPYTESYSYSCSNTEITCNSKNNACEAFICNCDRNAAICFSKAPYNKEHKNLDTKKYC

Source Source

Source organism organism	Sus scrofa
Common name common_name	pig
NCBI taxonomy ID ncbi_taxonomy_id	9823
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	CALCIUM ION
Molecular weight formula_weight	40.1 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 3 Entity 3 non-polymer

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

Entity 4 Entity 4 non-polymer

Description description	TAUROCHENODEOXYCHOLIC ACID
Molecular weight formula_weight	499.7 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	114

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6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_id	d2b01a_
Class class	a — All alpha proteins
Fold Fold fold	a.133 — Phospholipase A2, PLA2
Superfamily Superfamily superfamily	a.133.1 — Phospholipase A2, PLA2
Family Family family	a.133.1.2 — Vertebrate phospholipase A2

CATH v4.4 (1 domains)

Domain ID domain_id	2b01A00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	90 — Phospholipase A2
Homologous superfamily homologous superfamily	10 — Phospholipase A2 domain

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Unit-cell length a length_a	68.346 Å
Unit-cell length b length_b	68.346 Å
Unit-cell length c length_c	67.070 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 31 2 1
Space-group number int_tables_number	152
Crystal system crystal_system	—

Resolution resolution	2.200 Å
Low-resolution limit resolution_low	27.080 Å
R factor r_factor	0.2030
R_work r_work	0.2030
R_free r_free	0.2330

Crystal Structure of Porcine Pancreatic Phospholipase A2 in Complex with Taurochenodeoxycholate

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

Phospholipase A2, major isoenzyme

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

2b01__assembly_1__model_1

2b01__assembly_1__model_1 | I(q)

2b01__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 (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) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (1)

Crystal Structure of Porcine Pancreatic Phospholipase A2 in Complex with Taurochenodeoxycholate

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

Phospholipase A2, major isoenzyme

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

2b01__assembly_1__model_1

2b01__assembly_1__model_1 | I(q)

2b01__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 (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) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (1)