1c51

PHOTOSYNTHETIC REACTION CENTER AND CORE ANTENNA SYSTEM (TRIMERIC), ALPHA CARBON ONLY

Method: X-RAY DIFFRACTION

▼

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

No usable UniProt protein identity is available for this entry.

The relationship tables retain this entry's assembly and composition data, but cross-PDB links for the same protein cannot be established reliably without a unified protein identity.

Assembly Composition of the Current Entry

Assembly	Physical composition	Protein state	蛋白 / DNA / RNA / 其他Polymer	Data consistency
1	Protein heterocomplex	Heteromer	24 / 0 / 0 / 0	Consistent with protein count

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.

▼

2. Structure Basics 2. Structure Basics

Entry ID entry_id	1c51
Deposition date deposition_date	1999-10-21
Structure title title	PHOTOSYNTHETIC REACTION CENTER AND CORE ANTENNA SYSTEM (TRIMERIC), ALPHA CARBON ONLY
Keywords keywords	;PHOTOSYNTHESIS, PHOTOSYNTHETIC REACTION CENTER, OXYGENIC PHOTOSYNTHESIS, CORE- ANTENNA LIGHT-HARVESTING SYSTEM, THERMOPHILIC CYANOBACTERIUM, HELIX-BUNDLE MEMBRANE PROTEIN, PHOTOSYNTHESIS-ELECTRON TRANSPORT COMPLEX ;; PHOTOSYNTHESIS/ELECTRON TRANSPORT
Experimental Method method	X-RAY DIFFRACTION

▼

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.

1c51__assembly_1__model_1

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

Download this curve (.dat)

1c51__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1c51__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	67.62 Å
Rg (electron density)	67.44 Å
Total Rg	67.68 Å
Atom count	5484
Residues	0
Excluded volume	1303000 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1c51__assembly_1__model_1`	24-meric （24）	Success	4.1.3-1-20251215 (887e7ef)	View Download

▶

4. Crystallography and Experiment 4. Crystallography & Experiment

▶

5. Entities and Polymers Entities & Polymers (11)

Entity 1 Entity 1 polymer

Description description	PROTEIN (PHOTOSYSTEM I: SUBUNIT PSAA)
Molecular weight formula_weight	50825.8 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	3672

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Entity 2 Entity 2 polymer

Description description	PROTEIN (PHOTOSYSTEM I: SUBUNIT PSAB )
Molecular weight formula_weight	52698.1 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

Entity 3 Entity 3 polymer

Description description	PROTEIN (PHOTOSYSTEM I: SUBUNIT PSAC)
Molecular weight formula_weight	6571.1 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Entity 4 Entity 4 polymer

Description description	PROTEIN (PHOTOSYSTEM I: SUBUNIT PSAD)
Molecular weight formula_weight	10656.1 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Entity 5 Entity 5 polymer

Description description	PROTEIN (PHOTOSYSTEM I: SUBUNIT PSAE)
Molecular weight formula_weight	6400.9 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	E

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Entity 6 Entity 6 polymer

Description description	PROTEIN (PHOTOSYSTEM I: SUBUNIT PSAF)
Molecular weight formula_weight	13039.1 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	F

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Entity 7 Entity 7 polymer

Description description	PROTEIN (PHOTOSYSTEM I: SUBUNIT PSAK)
Molecular weight formula_weight	6656.2 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	K

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Entity 8 Entity 8 polymer

Description description	PROTEIN (PHOTOSYSTEM I: SUBUNIT PSAL)
Molecular weight formula_weight	10230.6 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	L

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Entity 9 Entity 9 non-polymer

Description description	CHLOROPHYLL A
Molecular weight formula_weight	893.5 kDa
Source method src_method	syn
Copy count entity_count	72

Entity 10 Entity 10 non-polymer

Description description	PHYLLOQUINONE
Molecular weight formula_weight	450.7 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 11 Entity 11 non-polymer

Description description	IRON/SULFUR CLUSTER
Molecular weight formula_weight	351.6 kDa
Source method src_method	syn
Copy count entity_count	3

▼

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d1c51a_
Class class	i — Low resolution protein structures
Fold Fold fold	i.5 — Photosystems
Superfamily Superfamily superfamily	i.5.1 — Photosystems
Family Family family	i.5.1.1 — Photosystems

Domain ID domain_id	d1c51b_
Class class	i — Low resolution protein structures
Fold Fold fold	i.5 — Photosystems
Superfamily Superfamily superfamily	i.5.1 — Photosystems
Family Family family	i.5.1.1 — Photosystems

Domain ID domain_id	d1c51c_
Class class	i — Low resolution protein structures
Fold Fold fold	i.5 — Photosystems
Superfamily Superfamily superfamily	i.5.1 — Photosystems
Family Family family	i.5.1.1 — Photosystems

Domain ID domain_id	d1c51d_
Class class	i — Low resolution protein structures
Fold Fold fold	i.5 — Photosystems
Superfamily Superfamily superfamily	i.5.1 — Photosystems
Family Family family	i.5.1.1 — Photosystems

Domain ID domain_id	d1c51e_
Class class	i — Low resolution protein structures
Fold Fold fold	i.5 — Photosystems
Superfamily Superfamily superfamily	i.5.1 — Photosystems
Family Family family	i.5.1.1 — Photosystems

Domain ID domain_id	d1c51f_
Class class	i — Low resolution protein structures
Fold Fold fold	i.5 — Photosystems
Superfamily Superfamily superfamily	i.5.1 — Photosystems
Family Family family	i.5.1.1 — Photosystems

Domain ID domain_id	d1c51k_
Class class	i — Low resolution protein structures
Fold Fold fold	i.5 — Photosystems
Superfamily Superfamily superfamily	i.5.1 — Photosystems
Family Family family	i.5.1.1 — Photosystems

Domain ID domain_id	d1c51l_
Class class	i — Low resolution protein structures
Fold Fold fold	i.5 — Photosystems
Superfamily Superfamily superfamily	i.5.1 — Photosystems
Family Family family	i.5.1.1 — Photosystems

▶

Unit-cell length a length_a	286.000 Å
Unit-cell length b length_b	286.000 Å
Unit-cell length c length_c	167.000 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 63
Space-group number int_tables_number	173
Crystal system crystal_system	—

Resolution resolution	4.000 Å
Low-resolution limit resolution_low	60.000 Å
R factor r_factor	—
R_work r_work	—
R_free r_free	—

PHOTOSYNTHETIC REACTION CENTER AND CORE ANTENNA SYSTEM (TRIMERIC), ALPHA CARBON ONLY

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

Assembly Composition of the Current Entry

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

1c51__assembly_1__model_1

1c51__assembly_1__model_1 | I(q)

1c51__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 (11)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 polymer

Polymer Polymer

Entity 4 Entity 4 polymer

Polymer Polymer

Entity 5 Entity 5 polymer

Polymer Polymer

Entity 6 Entity 6 polymer

Polymer Polymer

Entity 7 Entity 7 polymer

Polymer Polymer

Entity 8 Entity 8 polymer

Polymer Polymer

Entity 9 Entity 9 non-polymer

Entity 10 Entity 10 non-polymer

Entity 11 Entity 11 non-polymer

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (8 domains)

7. Citations (6)