SAXSdb — 1psh

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

PHOSPHOLIPASE A2

Naja naja

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 3	CALCIUM ION × 3 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PA2_NAJNA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–119； UniProt 1–119 Author chain B； PDBConstruct 1–119； UniProt 1–119 Author chain C； PDBConstruct 1–119； UniProt 1–119

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	1psh
Deposition date deposition_date	1992-07-28
Structure title title	CRYSTAL STRUCTURE OF PHOSPHOLIPASE A2 FROM INDIAN COBRA REVEALS A TRIMERIC ASSOCIATION
Keywords keywords	CARBOXYLIC ESTER HYDROLASE; CARBOXYLIC ESTER 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.

1psh__assembly_1__model_1

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

Download this curve (.dat)

1psh__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1psh__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	21.54 Å
Rg (electron density)	20.34 Å
Total Rg	21.27 Å
Atom count	2787
Residues	357
Excluded volume	48449 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1psh__assembly_1__model_1`	trimeric （3）	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 (3)

Entity 1 Entity 1 polymer

Description description	PHOSPHOLIPASE A2
Molecular weight formula_weight	13357.9 kDa
EC 编号 ec_number	3.1.1.4
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	2935

NLYQFKNMIKCTVPSRSWWDFADYGCYCGRGGSGTPVDDLDRCCQVHDNCYNEAEKISGCWPYFKTYSYECSQGTLTCKGDNNACAASVCDCDRLAAICFAGAPYNDNNYNIDLKARCQ

Source Source

Source organism organism	Naja naja
Common name common_name	Indian cobra
NCBI taxonomy ID ncbi_taxonomy_id	35670

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 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	148

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

Domain ID domain_id	d1psha_
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

Domain ID domain_id	d1pshb_
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

Domain ID domain_id	d1pshc_
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 (3 domains)

Domain ID domain_id	1pshA00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	90 — Phospholipase A2
Homologous superfamily homologous superfamily	10 — Phospholipase A2 domain

Domain ID domain_id	1pshB00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	90 — Phospholipase A2
Homologous superfamily homologous superfamily	10 — Phospholipase A2 domain

Domain ID domain_id	1pshC00
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	88.600 Å
Unit-cell length b length_b	88.600 Å
Unit-cell length c length_c	107.400 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	24

Space group space_group	P 43 21 2
Space-group number int_tables_number	96
Crystal system crystal_system	—

Resolution resolution	2.300 Å
Low-resolution limit resolution_low	6.000 Å
R factor r_factor	0.1740
R_work r_work	0.1740
R_free r_free	—

CRYSTAL STRUCTURE OF PHOSPHOLIPASE A2 FROM INDIAN COBRA REVEALS A TRIMERIC ASSOCIATION

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

PHOSPHOLIPASE A2

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

1psh__assembly_1__model_1

1psh__assembly_1__model_1 | I(q)

1psh__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (1)

CRYSTAL STRUCTURE OF PHOSPHOLIPASE A2 FROM INDIAN COBRA REVEALS A TRIMERIC ASSOCIATION

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

PHOSPHOLIPASE A2

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

1psh__assembly_1__model_1

1psh__assembly_1__model_1 | I(q)

1psh__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (1)