1qov

PHOTOSYNTHETIC REACTION CENTER MUTANT WITH ALA M260 REPLACED WITH TRP (CHAIN M, A260W)

Method: X-RAY DIFFRACTION

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

PHOTOSYNTHETIC REACTION CENTER

RHODOBACTER SPHAEROIDES

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	PHOTOSYNTHETIC REACTION CENTER × 1 （P02954） PHOTOSYNTHETIC REACTION CENTER × 1 （P02953） BACTERIOCHLOROPHYLL A × 4 UBIQUINONE-10 × 1 BACTERIOPHEOPHYTIN A × 2 FE (II) ION × 1 SPEROIDENONE × 1 CARDIOLIPIN × 1 CHLORIDE ION × 1 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RCEH_RHOSH
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain H； PDBConstruct 1–260； UniProt 1–260

PHOTOSYNTHETIC REACTION CENTER

RHODOBACTER SPHAEROIDES

UniProt P02954

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	PHOTOSYNTHETIC REACTION CENTER × 1 （P11846） PHOTOSYNTHETIC REACTION CENTER × 1 （P02953） BACTERIOCHLOROPHYLL A × 4 UBIQUINONE-10 × 1 BACTERIOPHEOPHYTIN A × 2 FE (II) ION × 1 SPEROIDENONE × 1 CARDIOLIPIN × 1 CHLORIDE ION × 1 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RCEL_RHOSH
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain L； PDBConstruct 1–281； UniProt 1–281

PHOTOSYNTHETIC REACTION CENTER

RHODOBACTER SPHAEROIDES

UniProt P02953

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	PHOTOSYNTHETIC REACTION CENTER × 1 （P11846） PHOTOSYNTHETIC REACTION CENTER × 1 （P02954） BACTERIOCHLOROPHYLL A × 4 UBIQUINONE-10 × 1 BACTERIOPHEOPHYTIN A × 2 FE (II) ION × 1 SPEROIDENONE × 1 CARDIOLIPIN × 1 CHLORIDE ION × 1 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RCEM_RHOSH
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain M； PDBConstruct 1–307； UniProt 1–307

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	1qov
Deposition date deposition_date	1999-11-17
Structure title title	PHOTOSYNTHETIC REACTION CENTER MUTANT WITH ALA M260 REPLACED WITH TRP (CHAIN M, A260W)
Keywords keywords	PHOTOSYNTHETIC REACTION CENTER, TRANSMEMBRANE, ELECTRON TRANSPORT, PHOTOSYNTHESIS, CARDIOLIPIN, MEMBRANE PROTEIN; PHOTOSYNTHETIC REACTION CENTER
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.

1qov__assembly_1__model_1

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

Download this curve (.dat)

1qov__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1qov__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	29.75 Å
Rg (electron density)	28.46 Å
Total Rg	29.35 Å
Atom count	7046
Residues	823
Excluded volume	128770 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1qov__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 (11)

Entity 1 Entity 1 polymer

Description description	PHOTOSYNTHETIC REACTION CENTER
Molecular weight formula_weight	28066.3 kDa
Mutation mutation	YES
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	H
Atom count atom_count	7312

MVGVTAFGNFDLASLAIYSFWIFLAGLIYYLQTENMREGYPLENEDGTPAANQGPFPLPKPKTFILPHGRGTLTVPGPESEDRPIALARTAVSEGFPHAPTGDPMKDGVGPASWVARRDLPELDGHGHNKIKPMKAAAGFHVSAGKNPIGLPVRGCDLEIAGKVVDIWVDIPEQMARFLEVELKDGSTRLLPMQMVKVQSNRVHVNALSSDLFAGIPTIKSPTEVTLLEEDKICGYVAGGLMYAAPKRKSVVAAMLAEYA

Source Source

Source organism organism	RHODOBACTER SPHAEROIDES
NCBI taxonomy ID ncbi_taxonomy_id	1063
Host organism host_organism	RHODOBACTER SPHAEROIDES

Entity 2 Entity 2 polymer

Description description	PHOTOSYNTHETIC REACTION CENTER
Molecular weight formula_weight	31346.4 kDa
Mutation mutation	YES
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	L

ALLSFERKYRVPGGTLVGGNLFDFWVGPFYVGFFGVATFFFAALGIILIAWSAVLQGTWNPQLISVYPPALEYGLGGAPLAKGGLWQIITICATGAFVSWALREVEICRKLGIGYHIPFAFAFAILAYLTLVLFRPVMMGAWGYAFPYGIWTHLDWVSNTGYTYGNFHYNPAHMIAISFFFTNALALALHGALVLSAANPEKGKEMRTPDHEDTFFRDLVGYSIGTLGIHRLGLLLSLSAVFFSALCMIITGTIWFDQWVDWWQWWVKLPWWANIPGGING

Source Source

Source organism organism	RHODOBACTER SPHAEROIDES
NCBI taxonomy ID ncbi_taxonomy_id	1063
Host organism host_organism	RHODOBACTER SPHAEROIDES

Entity 3 Entity 3 polymer

Description description	PHOTOSYNTHETIC REACTION CENTER
Molecular weight formula_weight	34513.7 kDa
Mutation mutation	YES
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	M

AEYQNIFSQVQVRGPADLGMTEDVNLANRSGVGPFSTLLGWFGNAQLGPIYLGSLGVLSLFSGLMWFFTIGIWFWYQAGWNPAVFLRDLFFFSLEPPAPEYGLSFAAPLKEGGLWLIASFFMFVAVWSWWGRTYLRAQALGMGKHTAWAFLSAIWLWMVLGFIRPILMGSWSEAVPYGIFSHLDWTNNFSLVHGNLFYNPFHGLSIAFLYGSALLFAMHGATILAVSRFGGERELEQIADRGTAAERAALFWRWTMGFNWTMEGIHRWAIWMAVLVTLTGGIGILLSGTVVDNWYVWGQNHGMAPLN

Source Source

Source organism organism	RHODOBACTER SPHAEROIDES
NCBI taxonomy ID ncbi_taxonomy_id	1063
Host organism host_organism	RHODOBACTER SPHAEROIDES

Entity 4 Entity 4 non-polymer

Description description	BACTERIOCHLOROPHYLL A
Molecular weight formula_weight	911.5 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 5 Entity 5 non-polymer

Description description	UBIQUINONE-10
Molecular weight formula_weight	863.3 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 6 Entity 6 non-polymer

Description description	BACTERIOPHEOPHYTIN A
Molecular weight formula_weight	889.2 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 7 Entity 7 non-polymer

Description description	FE (II) ION
Molecular weight formula_weight	55.8 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 8 Entity 8 non-polymer

Description description	SPEROIDENONE
Molecular weight formula_weight	595.0 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 9 Entity 9 non-polymer

Description description	CARDIOLIPIN
Molecular weight formula_weight	1464.0 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 10 Entity 10 non-polymer

Description description	CHLORIDE ION
Molecular weight formula_weight	35.5 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 11 Entity 11 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	250

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6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d1qovh1
Class class	b — All beta proteins
Fold Fold fold	b.41 — PRC-barrel domain
Superfamily Superfamily superfamily	b.41.1 — PRC-barrel domain
Family Family family	b.41.1.1 — Photosynthetic reaction centre, H-chain, cytoplasmic domain

Domain ID domain_id	d1qovh2
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.23 — Single transmembrane helix
Superfamily Superfamily superfamily	f.23.10 — Photosystem II reaction centre subunit H, transmembrane region
Family Family family	f.23.10.1 — Photosystem II reaction centre subunit H, transmembrane region

Domain ID domain_id	d1qovl_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.26 — Bacterial photosystem II reaction centre, L and M subunits
Superfamily Superfamily superfamily	f.26.1 — Bacterial photosystem II reaction centre, L and M subunits
Family Family family	f.26.1.1 — Bacterial photosystem II reaction centre, L and M subunits

Domain ID domain_id	d1qovm_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.26 — Bacterial photosystem II reaction centre, L and M subunits
Superfamily Superfamily superfamily	f.26.1 — Bacterial photosystem II reaction centre, L and M subunits
Family Family family	f.26.1.1 — Bacterial photosystem II reaction centre, L and M subunits

CATH v4.4 (6 domains)

Domain ID domain_id	1qovH01
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	540 — Photosynthetic Reaction Center; Chain H, domain 1
Homologous superfamily homologous superfamily	10 — Photosynthetic reaction centre, H subunit, N-terminal domain

Domain ID domain_id	1qovH02
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	50 — Photosynthetic Reaction Center; Chain H, domain 2
Homologous superfamily homologous superfamily	10 — Photosynthetic Reaction Center, subunit H, domain 2

Domain ID domain_id	1qovL01
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	85 — Photosynthetic Reaction Center, subunit M; domain 1
Homologous superfamily homologous superfamily	10 — Photosystem II protein D1-like

Domain ID domain_id	1qovL02
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	85 — Photosynthetic Reaction Center, subunit M; domain 1
Homologous superfamily homologous superfamily	10 — Photosystem II protein D1-like

Domain ID domain_id	1qovM01
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	85 — Photosynthetic Reaction Center, subunit M; domain 1
Homologous superfamily homologous superfamily	10 — Photosystem II protein D1-like

Domain ID domain_id	1qovM02
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	85 — Photosynthetic Reaction Center, subunit M; domain 1
Homologous superfamily homologous superfamily	10 — Photosystem II protein D1-like

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Unit-cell length a length_a	142.050 Å
Unit-cell length b length_b	142.050 Å
Unit-cell length c length_c	186.810 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	2.100 Å
Low-resolution limit resolution_low	30.000 Å
R factor r_factor	—
R_work r_work	0.1690
R_free r_free	0.1860

PHOTOSYNTHETIC REACTION CENTER MUTANT WITH ALA M260 REPLACED WITH TRP (CHAIN M, A260W)

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

PHOTOSYNTHETIC REACTION CENTER

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

PHOTOSYNTHETIC REACTION CENTER

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

PHOTOSYNTHETIC REACTION CENTER

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

1qov__assembly_1__model_1

1qov__assembly_1__model_1 | I(q)

1qov__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

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 non-polymer

Entity 8 Entity 8 non-polymer

Entity 9 Entity 9 non-polymer

Entity 10 Entity 10 non-polymer

Entity 11 Entity 11 water

6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (4 domains)

CATH v4.4 (6 domains)

7. Citations (3)