SAXSdb — 2v8a

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

ALLOPHYCOCYANIN ALPHA CHAIN

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 6	ALLOPHYCOCYANIN BETA CHAIN × 3 （P50031） PHYCOCYANOBILIN × 6	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PHAA_SYNEL
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–161； UniProt 1–161

ALLOPHYCOCYANIN BETA CHAIN

OrganismNot specified

UniProt P50031

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 6	ALLOPHYCOCYANIN ALPHA CHAIN × 3 （P50030） PHYCOCYANOBILIN × 6	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PHAB_SYNEL
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–161； UniProt 1–161

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	2v8a
Deposition date deposition_date	2007-08-06
Structure title title	The structure of Thermosynechococcus elongatus allophycocyanin at 3.5 Angstroems.
Keywords keywords	ANTENNA, TRANSPORT, CHROMOPHORE, METHYLATION, BILE PIGMENT, PHYCOBILISOME, PHOTOSYNTHESIS, LIGHT-HARVESTING, ELECTRON TRANSPORT; ELECTRON TRANSPORT
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.

2v8a__assembly_1__model_1

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

Download this curve (.dat)

2v8a__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2v8a__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	39.18 Å
Rg (electron density)	38.43 Å
Total Rg	38.93 Å
Atom count	7569
Residues	960
Excluded volume	135400 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2v8a__assembly_1__model_1`	hexameric （6）	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	ALLOPHYCOCYANIN ALPHA CHAIN
Molecular weight formula_weight	17555.9 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	2523

MSVVTKSIVNADAEARYLSPGELDRIKNFVSTGERRLRIAQTLTENRERIVKQAGDQLFQKRPDVVSPGGNAYGEEMTATCLRDLDYYLRLVTYGIVAGDVTPIEEIGLVGVREMYNSLGTPIPAVAEGIRAMKNVACSLLSAEDAAEAGSYFDFVIGAMQ

Entity 2 Entity 2 polymer

Description description	ALLOPHYCOCYANIN BETA CHAIN
Molecular weight formula_weight	17388.9 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

MQDAITAVINASDVQGKYLDTAAMEKLKAYFATGELRVRAASVISANAANIVKEAVAKSLLYSDITRPGGNMYTTRRYAACIRDLDYYLRYATYAMLAGDPSILDERVLNGLKETYNSLGVPIAATVQAIQAMKEVTASLVGADAGKEMGIYFDYICSGLS

Entity 3 Entity 3 non-polymer

Description description	PHYCOCYANOBILIN
Molecular weight formula_weight	588.7 kDa
Source method src_method	syn
Copy count entity_count	2

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6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id	2v8aA00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	490 — Globin-like
Homologous superfamily homologous superfamily	20 — Phycocyanins

Domain ID domain_id	2v8aB00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	490 — Globin-like
Homologous superfamily homologous superfamily	20 — Phycocyanins

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Unit-cell length a length_a	102.177 Å
Unit-cell length b length_b	102.177 Å
Unit-cell length c length_c	193.984 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	18

Space group space_group	H 3 2
Space-group number int_tables_number	155
Crystal system crystal_system	—

Resolution resolution	3.500 Å
Low-resolution limit resolution_low	43.150 Å
R factor r_factor	0.2610
R_work r_work	0.2600
R_free r_free	0.2850

The structure of Thermosynechococcus elongatus allophycocyanin at 3.5 Angstroems.

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

ALLOPHYCOCYANIN ALPHA CHAIN

State in the Current Structure

Other States of the Same Protein in the Database

ALLOPHYCOCYANIN BETA CHAIN

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

2v8a__assembly_1__model_1

2v8a__assembly_1__model_1 | I(q)

2v8a__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 non-polymer

6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)

The structure of Thermosynechococcus elongatus allophycocyanin at 3.5 Angstroems.

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

ALLOPHYCOCYANIN ALPHA CHAIN

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

ALLOPHYCOCYANIN BETA CHAIN

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

2v8a__assembly_1__model_1

2v8a__assembly_1__model_1 | I(q)

2v8a__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 non-polymer

6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)