7mh8

Crystal structure of R. sphaeroides Photosynthetic Reaction Center variant; Y(M210)3-methyltyrosine

Method: X-RAY DIFFRACTION

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

Reaction center protein H chain

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	Reaction center protein L chain × 1 （P0C0Y8） Reaction center protein M chain × 1 （P0C0Y9） LAURYL DIMETHYLAMINE-N-OXIDE × 5 BACTERIOCHLOROPHYLL A × 4 BACTERIOPHEOPHYTIN A × 2 UBIQUINONE-10 × 2 FE (III) ION × 1 SPHEROIDENE × 1 CARDIOLIPIN × 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 1–259； UniProt 1–259

Reaction center protein L chain

Rhodobacter sphaeroides

UniProt P0C0Y8

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	Reaction center protein H chain × 1 （P0C0Y7） Reaction center protein M chain × 1 （P0C0Y9） LAURYL DIMETHYLAMINE-N-OXIDE × 5 BACTERIOCHLOROPHYLL A × 4 BACTERIOPHEOPHYTIN A × 2 UBIQUINONE-10 × 2 FE (III) ION × 1 SPHEROIDENE × 1 CARDIOLIPIN × 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 1–282； UniProt 1–282

Reaction center protein M chain

Rhodobacter sphaeroides

UniProt P0C0Y9

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	Reaction center protein H chain × 1 （P0C0Y7） Reaction center protein L chain × 1 （P0C0Y8） LAURYL DIMETHYLAMINE-N-OXIDE × 5 BACTERIOCHLOROPHYLL A × 4 BACTERIOPHEOPHYTIN A × 2 UBIQUINONE-10 × 2 FE (III) ION × 1 SPHEROIDENE × 1 CARDIOLIPIN × 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 1–308； UniProt 1–308

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	7mh8
Deposition date deposition_date	2021-04-14
Structure title title	Crystal structure of R. sphaeroides Photosynthetic Reaction Center variant; Y(M210)3-methyltyrosine
Keywords keywords	photosynthetic, membrane protein, noncanonical amino acid, methyltyrosine, PHOTOSYNTHESIS; PHOTOSYNTHESIS
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.

7mh8__assembly_1__model_1

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

Download this curve (.dat)

7mh8__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

7mh8__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	29.77 Å
Rg (electron density)	28.42 Å
Total Rg	29.30 Å
Atom count	7086
Residues	820
Excluded volume	129730 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`7mh8__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	Reaction center protein H chain
Molecular weight formula_weight	28923.2 kDa
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	7221

MVGVTAFGNFDLASLAIYSFWIFLAGLIYYLQTENMREGYPLENEDGTPAANQGPFPLPKPKTFILPHGRGTLTVPGPESEDRPIALARTAVSEGFPHAPTGDPMKDGVGPASWVARRDLPELDGHGHNKIKPMKAAAGFHVSAGKNPIGLPVRGCDLEIAGKVVDIWVDIPEQMARFLEVELKDGSTRLLPMQMVKVQSNRVHVNALSSDLFAGIPTIKSPTEVTLLEEDKICGYVAGGLMYAAPKRKSVVAAMLAEYVHHHHHH

Source Source

Source organism organism	Rhodobacter sphaeroides
Common name common_name	Rhodopseudomonas sphaeroides
NCBI taxonomy ID ncbi_taxonomy_id	1063
Host organism host_organism	Luteovulum sphaeroides

Entity 2 Entity 2 polymer

Description description	Reaction center protein L chain
Molecular weight formula_weight	31477.6 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	L

MALLSFERKYRVPGGTLVGGNLFDFWVGPFYVGFFGVATFFFAALGIILIAWSAVLQGTWNPQLISVYPPALEYGLGGAPLAKGGLWQIITICATGAFVSWALREVEICRKLGIGYHIPFAFAFAILAYLTLVLFRPVMMGAWGYAFPYGIWTHLDWVSNTGYTYGNFHYNPAHMIAISFFFTNALALALHGALVLSAANPEKGKEMRTPDHEDTFFRDLVGYSIGTLGIHRLGLLLSLSAVFFSALCMIITGTIWFDQWVDWWQWWVKLPWWANIPGGING

Source Source

Source organism organism	Rhodobacter sphaeroides
Common name common_name	Rhodopseudomonas sphaeroides
NCBI taxonomy ID ncbi_taxonomy_id	1063
Host organism host_organism	Luteovulum sphaeroides

Entity 3 Entity 3 polymer

Description description	Reaction center protein M chain
Molecular weight formula_weight	34543.8 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	M

MAEYQNIFSQVQVRGPADLGMTEDVNLANRSGVGPFSTLLGWFGNAQLGPIYLGSLGVLSLFSGLMWFFTIGIWFWYQAGWNPAVFLRDLFFFSLEPPAPEYGLSFAAPLKEGGLWLIASFFMFVAVWSWWGRTYLRAQALGMGKHTAWAFLSAIWLWMVLGFIRPILMGSWSEAVPYGIFSHLDWTNNFSLVHGNLFYNPFHGLSIAFLYGSALLFAMHGATILAVSRFGGERELEQIADRGTAAERAALFWRWTMGFNATMEGIHRWAIWMAVLVTLTGGIGILLSGTVVDNWYVWGQNHGMAPLN

Source Source

Source organism organism	Rhodobacter sphaeroides
Common name common_name	Rhodopseudomonas sphaeroides
NCBI taxonomy ID ncbi_taxonomy_id	1063
Host organism host_organism	Luteovulum sphaeroides

Entity 4 Entity 4 non-polymer

Description description	LAURYL DIMETHYLAMINE-N-OXIDE
Molecular weight formula_weight	229.4 kDa
Source method src_method	syn
Copy count entity_count	5

Entity 5 Entity 5 non-polymer

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

Entity 6 Entity 6 non-polymer

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

Entity 7 Entity 7 non-polymer

Description description	UBIQUINONE-10
Molecular weight formula_weight	863.3 kDa
Source method src_method	nat
Copy count entity_count	2

Entity 8 Entity 8 non-polymer

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

Entity 9 Entity 9 non-polymer

Description description	SPHEROIDENE
Molecular weight formula_weight	568.9 kDa
Source method src_method	nat
Copy count entity_count	1

Entity 10 Entity 10 non-polymer

Description description	CARDIOLIPIN
Molecular weight formula_weight	1464.0 kDa
Source method src_method	nat
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	132

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6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id	7mh8H01
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	7mh8H02
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

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Unit-cell length a length_a	140.960 Å
Unit-cell length b length_b	140.960 Å
Unit-cell length c length_c	187.010 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	2.750 Å
Low-resolution limit resolution_low	38.960 Å
R factor r_factor	0.1799
R_work r_work	0.1788
R_free r_free	0.2014

Crystal structure of R. sphaeroides Photosynthetic Reaction Center variant; Y(M210)3-methyltyrosine

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

Reaction center protein H 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

Reaction center protein L 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

Reaction center protein M 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

7mh8__assembly_1__model_1

7mh8__assembly_1__model_1 | I(q)

7mh8__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) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)